root / htools / Ganeti / HTools / Cluster.hs @ 5f828ce4
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1 | e4f08c46 | Iustin Pop | {-| Implementation of cluster-wide logic. |
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2 | e4f08c46 | Iustin Pop | |
3 | e4f08c46 | Iustin Pop | This module holds all pure cluster-logic; I\/O related functionality |
4 | 525bfb36 | Iustin Pop | goes into the /Main/ module for the individual binaries. |
5 | e4f08c46 | Iustin Pop | |
6 | e4f08c46 | Iustin Pop | -} |
7 | e4f08c46 | Iustin Pop | |
8 | e2fa2baf | Iustin Pop | {- |
9 | e2fa2baf | Iustin Pop | |
10 | 4bc33d60 | Iustin Pop | Copyright (C) 2009, 2010, 2011 Google Inc. |
11 | e2fa2baf | Iustin Pop | |
12 | e2fa2baf | Iustin Pop | This program is free software; you can redistribute it and/or modify |
13 | e2fa2baf | Iustin Pop | it under the terms of the GNU General Public License as published by |
14 | e2fa2baf | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
15 | e2fa2baf | Iustin Pop | (at your option) any later version. |
16 | e2fa2baf | Iustin Pop | |
17 | e2fa2baf | Iustin Pop | This program is distributed in the hope that it will be useful, but |
18 | e2fa2baf | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | e2fa2baf | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
20 | e2fa2baf | Iustin Pop | General Public License for more details. |
21 | e2fa2baf | Iustin Pop | |
22 | e2fa2baf | Iustin Pop | You should have received a copy of the GNU General Public License |
23 | e2fa2baf | Iustin Pop | along with this program; if not, write to the Free Software |
24 | e2fa2baf | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
25 | e2fa2baf | Iustin Pop | 02110-1301, USA. |
26 | e2fa2baf | Iustin Pop | |
27 | e2fa2baf | Iustin Pop | -} |
28 | e2fa2baf | Iustin Pop | |
29 | 669d7e3d | Iustin Pop | module Ganeti.HTools.Cluster |
30 | e4f08c46 | Iustin Pop | ( |
31 | e4f08c46 | Iustin Pop | -- * Types |
32 | 85d0ddc3 | Iustin Pop | AllocSolution(..) |
33 | 47eed3f4 | Iustin Pop | , EvacSolution(..) |
34 | e4f08c46 | Iustin Pop | , Table(..) |
35 | 1a7eff0e | Iustin Pop | , CStats(..) |
36 | 9b8fac3d | Iustin Pop | , AllocStats |
37 | e86f7f65 | Iustin Pop | , AllocResult |
38 | 7eda951b | Iustin Pop | , AllocMethod |
39 | e4f08c46 | Iustin Pop | -- * Generic functions |
40 | e4f08c46 | Iustin Pop | , totalResources |
41 | 9b8fac3d | Iustin Pop | , computeAllocationDelta |
42 | e4f08c46 | Iustin Pop | -- * First phase functions |
43 | e4f08c46 | Iustin Pop | , computeBadItems |
44 | e4f08c46 | Iustin Pop | -- * Second phase functions |
45 | 7dfaafb1 | Iustin Pop | , printSolutionLine |
46 | 142538ff | Iustin Pop | , formatCmds |
47 | 0e8ae201 | Iustin Pop | , involvedNodes |
48 | 0e8ae201 | Iustin Pop | , splitJobs |
49 | 507fda3f | Iustin Pop | -- * Display functions |
50 | 507fda3f | Iustin Pop | , printNodes |
51 | 507fda3f | Iustin Pop | , printInsts |
52 | e4f08c46 | Iustin Pop | -- * Balacing functions |
53 | e4f08c46 | Iustin Pop | , checkMove |
54 | 5ad86777 | Iustin Pop | , doNextBalance |
55 | f25e5aac | Iustin Pop | , tryBalance |
56 | e4f08c46 | Iustin Pop | , compCV |
57 | 9bb5721c | Iustin Pop | , compCVNodes |
58 | 6bc39970 | Iustin Pop | , compDetailedCV |
59 | e4f08c46 | Iustin Pop | , printStats |
60 | 6b20875c | Iustin Pop | , iMoveToJob |
61 | 4a340313 | Iustin Pop | -- * IAllocator functions |
62 | 6cb1649f | Iustin Pop | , genAllocNodes |
63 | dbba5246 | Iustin Pop | , tryAlloc |
64 | 9b1584fc | Iustin Pop | , tryMGAlloc |
65 | dbba5246 | Iustin Pop | , tryReloc |
66 | 47eed3f4 | Iustin Pop | , tryNodeEvac |
67 | 20b376ff | Iustin Pop | , tryChangeGroup |
68 | 478df686 | Iustin Pop | , collapseFailures |
69 | 3ce8009a | Iustin Pop | -- * Allocation functions |
70 | 3ce8009a | Iustin Pop | , iterateAlloc |
71 | 3ce8009a | Iustin Pop | , tieredAlloc |
72 | 949397c8 | Iustin Pop | -- * Node group functions |
73 | 32b8d9c0 | Iustin Pop | , instanceGroup |
74 | 32b8d9c0 | Iustin Pop | , findSplitInstances |
75 | f4161783 | Iustin Pop | , splitCluster |
76 | e4f08c46 | Iustin Pop | ) where |
77 | e4f08c46 | Iustin Pop | |
78 | 63a78055 | Iustin Pop | import qualified Data.IntSet as IntSet |
79 | e4f08c46 | Iustin Pop | import Data.List |
80 | 129734d3 | Iustin Pop | import Data.Maybe (fromJust, isNothing) |
81 | 5182e970 | Iustin Pop | import Data.Ord (comparing) |
82 | e4f08c46 | Iustin Pop | import Text.Printf (printf) |
83 | e4f08c46 | Iustin Pop | |
84 | 669d7e3d | Iustin Pop | import qualified Ganeti.HTools.Container as Container |
85 | 669d7e3d | Iustin Pop | import qualified Ganeti.HTools.Instance as Instance |
86 | 669d7e3d | Iustin Pop | import qualified Ganeti.HTools.Node as Node |
87 | aec636b9 | Iustin Pop | import qualified Ganeti.HTools.Group as Group |
88 | e4c5beaf | Iustin Pop | import Ganeti.HTools.Types |
89 | 669d7e3d | Iustin Pop | import Ganeti.HTools.Utils |
90 | 1adec4be | Iustin Pop | import Ganeti.HTools.Compat |
91 | 6b20875c | Iustin Pop | import qualified Ganeti.OpCodes as OpCodes |
92 | e4f08c46 | Iustin Pop | |
93 | 9188aeef | Iustin Pop | -- * Types |
94 | 9188aeef | Iustin Pop | |
95 | 0c936d24 | Iustin Pop | -- | Allocation\/relocation solution. |
96 | 85d0ddc3 | Iustin Pop | data AllocSolution = AllocSolution |
97 | 129734d3 | Iustin Pop | { asFailures :: [FailMode] -- ^ Failure counts |
98 | 129734d3 | Iustin Pop | , asAllocs :: Int -- ^ Good allocation count |
99 | 129734d3 | Iustin Pop | , asSolution :: Maybe Node.AllocElement -- ^ The actual allocation result |
100 | 129734d3 | Iustin Pop | , asLog :: [String] -- ^ Informational messages |
101 | 85d0ddc3 | Iustin Pop | } |
102 | 85d0ddc3 | Iustin Pop | |
103 | 47eed3f4 | Iustin Pop | -- | Node evacuation/group change iallocator result type. This result |
104 | 47eed3f4 | Iustin Pop | -- type consists of actual opcodes (a restricted subset) that are |
105 | 47eed3f4 | Iustin Pop | -- transmitted back to Ganeti. |
106 | 47eed3f4 | Iustin Pop | data EvacSolution = EvacSolution |
107 | 5440c877 | Iustin Pop | { esMoved :: [(Idx, Gdx, [Ndx])] -- ^ Instances moved successfully |
108 | 5440c877 | Iustin Pop | , esFailed :: [(Idx, String)] -- ^ Instances which were not |
109 | 47eed3f4 | Iustin Pop | -- relocated |
110 | 1ab94e48 | Michael Hanselmann | , esOpCodes :: [[OpCodes.OpCode]] -- ^ List of jobs |
111 | 47eed3f4 | Iustin Pop | } |
112 | 47eed3f4 | Iustin Pop | |
113 | 40ee14bc | Iustin Pop | -- | Allocation results, as used in 'iterateAlloc' and 'tieredAlloc'. |
114 | 40ee14bc | Iustin Pop | type AllocResult = (FailStats, Node.List, Instance.List, |
115 | 40ee14bc | Iustin Pop | [Instance.Instance], [CStats]) |
116 | 40ee14bc | Iustin Pop | |
117 | 6cb1649f | Iustin Pop | -- | A type denoting the valid allocation mode/pairs. |
118 | 525bfb36 | Iustin Pop | -- |
119 | b0631f10 | Iustin Pop | -- For a one-node allocation, this will be a @Left ['Ndx']@, whereas |
120 | b0631f10 | Iustin Pop | -- for a two-node allocation, this will be a @Right [('Ndx', |
121 | b0631f10 | Iustin Pop | -- ['Ndx'])]@. In the latter case, the list is basically an |
122 | b0631f10 | Iustin Pop | -- association list, grouped by primary node and holding the potential |
123 | b0631f10 | Iustin Pop | -- secondary nodes in the sub-list. |
124 | b0631f10 | Iustin Pop | type AllocNodes = Either [Ndx] [(Ndx, [Ndx])] |
125 | 6cb1649f | Iustin Pop | |
126 | 525bfb36 | Iustin Pop | -- | The empty solution we start with when computing allocations. |
127 | 97936d51 | Iustin Pop | emptyAllocSolution :: AllocSolution |
128 | 97936d51 | Iustin Pop | emptyAllocSolution = AllocSolution { asFailures = [], asAllocs = 0 |
129 | 129734d3 | Iustin Pop | , asSolution = Nothing, asLog = [] } |
130 | 78694255 | Iustin Pop | |
131 | 47eed3f4 | Iustin Pop | -- | The empty evac solution. |
132 | 47eed3f4 | Iustin Pop | emptyEvacSolution :: EvacSolution |
133 | 47eed3f4 | Iustin Pop | emptyEvacSolution = EvacSolution { esMoved = [] |
134 | 47eed3f4 | Iustin Pop | , esFailed = [] |
135 | 47eed3f4 | Iustin Pop | , esOpCodes = [] |
136 | 47eed3f4 | Iustin Pop | } |
137 | 47eed3f4 | Iustin Pop | |
138 | 525bfb36 | Iustin Pop | -- | The complete state for the balancing solution. |
139 | 262a08a2 | Iustin Pop | data Table = Table Node.List Instance.List Score [Placement] |
140 | 6bc39970 | Iustin Pop | deriving (Show, Read) |
141 | e4f08c46 | Iustin Pop | |
142 | 179c0828 | Iustin Pop | -- | Cluster statistics data type. |
143 | 7034694d | Iustin Pop | data CStats = CStats { csFmem :: Integer -- ^ Cluster free mem |
144 | 7034694d | Iustin Pop | , csFdsk :: Integer -- ^ Cluster free disk |
145 | 7034694d | Iustin Pop | , csAmem :: Integer -- ^ Cluster allocatable mem |
146 | 7034694d | Iustin Pop | , csAdsk :: Integer -- ^ Cluster allocatable disk |
147 | 7034694d | Iustin Pop | , csAcpu :: Integer -- ^ Cluster allocatable cpus |
148 | 7034694d | Iustin Pop | , csMmem :: Integer -- ^ Max node allocatable mem |
149 | 7034694d | Iustin Pop | , csMdsk :: Integer -- ^ Max node allocatable disk |
150 | 7034694d | Iustin Pop | , csMcpu :: Integer -- ^ Max node allocatable cpu |
151 | 7034694d | Iustin Pop | , csImem :: Integer -- ^ Instance used mem |
152 | 7034694d | Iustin Pop | , csIdsk :: Integer -- ^ Instance used disk |
153 | 7034694d | Iustin Pop | , csIcpu :: Integer -- ^ Instance used cpu |
154 | 7034694d | Iustin Pop | , csTmem :: Double -- ^ Cluster total mem |
155 | 7034694d | Iustin Pop | , csTdsk :: Double -- ^ Cluster total disk |
156 | 7034694d | Iustin Pop | , csTcpu :: Double -- ^ Cluster total cpus |
157 | 7034694d | Iustin Pop | , csVcpu :: Integer -- ^ Cluster virtual cpus (if |
158 | 7034694d | Iustin Pop | -- node pCpu has been set, |
159 | 7034694d | Iustin Pop | -- otherwise -1) |
160 | 7034694d | Iustin Pop | , csXmem :: Integer -- ^ Unnacounted for mem |
161 | 7034694d | Iustin Pop | , csNmem :: Integer -- ^ Node own memory |
162 | 7034694d | Iustin Pop | , csScore :: Score -- ^ The cluster score |
163 | 7034694d | Iustin Pop | , csNinst :: Int -- ^ The total number of instances |
164 | 1a7eff0e | Iustin Pop | } |
165 | 6bc39970 | Iustin Pop | deriving (Show, Read) |
166 | 1a7eff0e | Iustin Pop | |
167 | 525bfb36 | Iustin Pop | -- | Currently used, possibly to allocate, unallocable. |
168 | 9b8fac3d | Iustin Pop | type AllocStats = (RSpec, RSpec, RSpec) |
169 | 9b8fac3d | Iustin Pop | |
170 | 7eda951b | Iustin Pop | -- | A simple type for allocation functions. |
171 | 7eda951b | Iustin Pop | type AllocMethod = Node.List -- ^ Node list |
172 | 7eda951b | Iustin Pop | -> Instance.List -- ^ Instance list |
173 | 7eda951b | Iustin Pop | -> Maybe Int -- ^ Optional allocation limit |
174 | 7eda951b | Iustin Pop | -> Instance.Instance -- ^ Instance spec for allocation |
175 | 7eda951b | Iustin Pop | -> AllocNodes -- ^ Which nodes we should allocate on |
176 | 7eda951b | Iustin Pop | -> [Instance.Instance] -- ^ Allocated instances |
177 | 7eda951b | Iustin Pop | -> [CStats] -- ^ Running cluster stats |
178 | 7eda951b | Iustin Pop | -> Result AllocResult -- ^ Allocation result |
179 | 7eda951b | Iustin Pop | |
180 | 9188aeef | Iustin Pop | -- * Utility functions |
181 | 9188aeef | Iustin Pop | |
182 | e4f08c46 | Iustin Pop | -- | Verifies the N+1 status and return the affected nodes. |
183 | e4f08c46 | Iustin Pop | verifyN1 :: [Node.Node] -> [Node.Node] |
184 | 9f6dcdea | Iustin Pop | verifyN1 = filter Node.failN1 |
185 | e4f08c46 | Iustin Pop | |
186 | 9188aeef | Iustin Pop | {-| Computes the pair of bad nodes and instances. |
187 | 9188aeef | Iustin Pop | |
188 | 9188aeef | Iustin Pop | The bad node list is computed via a simple 'verifyN1' check, and the |
189 | 9188aeef | Iustin Pop | bad instance list is the list of primary and secondary instances of |
190 | 9188aeef | Iustin Pop | those nodes. |
191 | 9188aeef | Iustin Pop | |
192 | 9188aeef | Iustin Pop | -} |
193 | 9188aeef | Iustin Pop | computeBadItems :: Node.List -> Instance.List -> |
194 | 9188aeef | Iustin Pop | ([Node.Node], [Instance.Instance]) |
195 | 9188aeef | Iustin Pop | computeBadItems nl il = |
196 | dbba5246 | Iustin Pop | let bad_nodes = verifyN1 $ getOnline nl |
197 | 5182e970 | Iustin Pop | bad_instances = map (`Container.find` il) . |
198 | 9f6dcdea | Iustin Pop | sort . nub $ |
199 | 2060348b | Iustin Pop | concatMap (\ n -> Node.sList n ++ Node.pList n) bad_nodes |
200 | 9188aeef | Iustin Pop | in |
201 | 9188aeef | Iustin Pop | (bad_nodes, bad_instances) |
202 | 9188aeef | Iustin Pop | |
203 | 525bfb36 | Iustin Pop | -- | Zero-initializer for the CStats type. |
204 | 1a7eff0e | Iustin Pop | emptyCStats :: CStats |
205 | 86ecce4a | Iustin Pop | emptyCStats = CStats 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 |
206 | 1a7eff0e | Iustin Pop | |
207 | 525bfb36 | Iustin Pop | -- | Update stats with data from a new node. |
208 | 1a7eff0e | Iustin Pop | updateCStats :: CStats -> Node.Node -> CStats |
209 | 1a7eff0e | Iustin Pop | updateCStats cs node = |
210 | f5b553da | Iustin Pop | let CStats { csFmem = x_fmem, csFdsk = x_fdsk, |
211 | f5b553da | Iustin Pop | csAmem = x_amem, csAcpu = x_acpu, csAdsk = x_adsk, |
212 | f5b553da | Iustin Pop | csMmem = x_mmem, csMdsk = x_mdsk, csMcpu = x_mcpu, |
213 | f5b553da | Iustin Pop | csImem = x_imem, csIdsk = x_idsk, csIcpu = x_icpu, |
214 | f5b553da | Iustin Pop | csTmem = x_tmem, csTdsk = x_tdsk, csTcpu = x_tcpu, |
215 | 86ecce4a | Iustin Pop | csVcpu = x_vcpu, |
216 | f5b553da | Iustin Pop | csXmem = x_xmem, csNmem = x_nmem, csNinst = x_ninst |
217 | 8c4c6a8a | Iustin Pop | } |
218 | 1a7eff0e | Iustin Pop | = cs |
219 | 2060348b | Iustin Pop | inc_amem = Node.fMem node - Node.rMem node |
220 | 1a7eff0e | Iustin Pop | inc_amem' = if inc_amem > 0 then inc_amem else 0 |
221 | 301789f4 | Iustin Pop | inc_adsk = Node.availDisk node |
222 | 2060348b | Iustin Pop | inc_imem = truncate (Node.tMem node) - Node.nMem node |
223 | 2060348b | Iustin Pop | - Node.xMem node - Node.fMem node |
224 | 2060348b | Iustin Pop | inc_icpu = Node.uCpu node |
225 | 2060348b | Iustin Pop | inc_idsk = truncate (Node.tDsk node) - Node.fDsk node |
226 | 86ecce4a | Iustin Pop | inc_vcpu = Node.hiCpu node |
227 | f52dadb2 | Iustin Pop | inc_acpu = Node.availCpu node |
228 | 8c4c6a8a | Iustin Pop | |
229 | 7034694d | Iustin Pop | in cs { csFmem = x_fmem + fromIntegral (Node.fMem node) |
230 | 7034694d | Iustin Pop | , csFdsk = x_fdsk + fromIntegral (Node.fDsk node) |
231 | 7034694d | Iustin Pop | , csAmem = x_amem + fromIntegral inc_amem' |
232 | 7034694d | Iustin Pop | , csAdsk = x_adsk + fromIntegral inc_adsk |
233 | 7034694d | Iustin Pop | , csAcpu = x_acpu + fromIntegral inc_acpu |
234 | 7034694d | Iustin Pop | , csMmem = max x_mmem (fromIntegral inc_amem') |
235 | 7034694d | Iustin Pop | , csMdsk = max x_mdsk (fromIntegral inc_adsk) |
236 | 7034694d | Iustin Pop | , csMcpu = max x_mcpu (fromIntegral inc_acpu) |
237 | 7034694d | Iustin Pop | , csImem = x_imem + fromIntegral inc_imem |
238 | 7034694d | Iustin Pop | , csIdsk = x_idsk + fromIntegral inc_idsk |
239 | 7034694d | Iustin Pop | , csIcpu = x_icpu + fromIntegral inc_icpu |
240 | f5b553da | Iustin Pop | , csTmem = x_tmem + Node.tMem node |
241 | f5b553da | Iustin Pop | , csTdsk = x_tdsk + Node.tDsk node |
242 | f5b553da | Iustin Pop | , csTcpu = x_tcpu + Node.tCpu node |
243 | 7034694d | Iustin Pop | , csVcpu = x_vcpu + fromIntegral inc_vcpu |
244 | 7034694d | Iustin Pop | , csXmem = x_xmem + fromIntegral (Node.xMem node) |
245 | 7034694d | Iustin Pop | , csNmem = x_nmem + fromIntegral (Node.nMem node) |
246 | f5b553da | Iustin Pop | , csNinst = x_ninst + length (Node.pList node) |
247 | de4ac2c2 | Iustin Pop | } |
248 | 1a7eff0e | Iustin Pop | |
249 | 9188aeef | Iustin Pop | -- | Compute the total free disk and memory in the cluster. |
250 | 1a7eff0e | Iustin Pop | totalResources :: Node.List -> CStats |
251 | de4ac2c2 | Iustin Pop | totalResources nl = |
252 | de4ac2c2 | Iustin Pop | let cs = foldl' updateCStats emptyCStats . Container.elems $ nl |
253 | f5b553da | Iustin Pop | in cs { csScore = compCV nl } |
254 | 9188aeef | Iustin Pop | |
255 | 9b8fac3d | Iustin Pop | -- | Compute the delta between two cluster state. |
256 | 9b8fac3d | Iustin Pop | -- |
257 | 9b8fac3d | Iustin Pop | -- This is used when doing allocations, to understand better the |
258 | e2436511 | Iustin Pop | -- available cluster resources. The return value is a triple of the |
259 | e2436511 | Iustin Pop | -- current used values, the delta that was still allocated, and what |
260 | e2436511 | Iustin Pop | -- was left unallocated. |
261 | 9b8fac3d | Iustin Pop | computeAllocationDelta :: CStats -> CStats -> AllocStats |
262 | 9b8fac3d | Iustin Pop | computeAllocationDelta cini cfin = |
263 | 9b8fac3d | Iustin Pop | let CStats {csImem = i_imem, csIdsk = i_idsk, csIcpu = i_icpu} = cini |
264 | 9b8fac3d | Iustin Pop | CStats {csImem = f_imem, csIdsk = f_idsk, csIcpu = f_icpu, |
265 | 9b8fac3d | Iustin Pop | csTmem = t_mem, csTdsk = t_dsk, csVcpu = v_cpu } = cfin |
266 | 7034694d | Iustin Pop | rini = RSpec (fromIntegral i_icpu) (fromIntegral i_imem) |
267 | 7034694d | Iustin Pop | (fromIntegral i_idsk) |
268 | 7034694d | Iustin Pop | rfin = RSpec (fromIntegral (f_icpu - i_icpu)) |
269 | 7034694d | Iustin Pop | (fromIntegral (f_imem - i_imem)) |
270 | 7034694d | Iustin Pop | (fromIntegral (f_idsk - i_idsk)) |
271 | 7034694d | Iustin Pop | un_cpu = fromIntegral (v_cpu - f_icpu)::Int |
272 | 7034694d | Iustin Pop | runa = RSpec un_cpu (truncate t_mem - fromIntegral f_imem) |
273 | 7034694d | Iustin Pop | (truncate t_dsk - fromIntegral f_idsk) |
274 | 9b8fac3d | Iustin Pop | in (rini, rfin, runa) |
275 | 9b8fac3d | Iustin Pop | |
276 | 525bfb36 | Iustin Pop | -- | The names and weights of the individual elements in the CV list. |
277 | 8a3b30ca | Iustin Pop | detailedCVInfo :: [(Double, String)] |
278 | 8a3b30ca | Iustin Pop | detailedCVInfo = [ (1, "free_mem_cv") |
279 | 8a3b30ca | Iustin Pop | , (1, "free_disk_cv") |
280 | 8a3b30ca | Iustin Pop | , (1, "n1_cnt") |
281 | 8a3b30ca | Iustin Pop | , (1, "reserved_mem_cv") |
282 | 8a3b30ca | Iustin Pop | , (4, "offline_all_cnt") |
283 | 8a3b30ca | Iustin Pop | , (16, "offline_pri_cnt") |
284 | 8a3b30ca | Iustin Pop | , (1, "vcpu_ratio_cv") |
285 | 8a3b30ca | Iustin Pop | , (1, "cpu_load_cv") |
286 | 8a3b30ca | Iustin Pop | , (1, "mem_load_cv") |
287 | 8a3b30ca | Iustin Pop | , (1, "disk_load_cv") |
288 | 8a3b30ca | Iustin Pop | , (1, "net_load_cv") |
289 | 306cccd5 | Iustin Pop | , (2, "pri_tags_score") |
290 | 8a3b30ca | Iustin Pop | ] |
291 | 8a3b30ca | Iustin Pop | |
292 | 179c0828 | Iustin Pop | -- | Holds the weights used by 'compCVNodes' for each metric. |
293 | 8a3b30ca | Iustin Pop | detailedCVWeights :: [Double] |
294 | 8a3b30ca | Iustin Pop | detailedCVWeights = map fst detailedCVInfo |
295 | fca250e9 | Iustin Pop | |
296 | 9188aeef | Iustin Pop | -- | Compute the mem and disk covariance. |
297 | 9bb5721c | Iustin Pop | compDetailedCV :: [Node.Node] -> [Double] |
298 | 9bb5721c | Iustin Pop | compDetailedCV all_nodes = |
299 | 9188aeef | Iustin Pop | let |
300 | 9188aeef | Iustin Pop | (offline, nodes) = partition Node.offline all_nodes |
301 | 2060348b | Iustin Pop | mem_l = map Node.pMem nodes |
302 | 2060348b | Iustin Pop | dsk_l = map Node.pDsk nodes |
303 | daee4bed | Iustin Pop | -- metric: memory covariance |
304 | 4715711d | Iustin Pop | mem_cv = stdDev mem_l |
305 | daee4bed | Iustin Pop | -- metric: disk covariance |
306 | 4715711d | Iustin Pop | dsk_cv = stdDev dsk_l |
307 | c3c7a0c1 | Iustin Pop | -- metric: count of instances living on N1 failing nodes |
308 | c3c7a0c1 | Iustin Pop | n1_score = fromIntegral . sum . map (\n -> length (Node.sList n) + |
309 | c3c7a0c1 | Iustin Pop | length (Node.pList n)) . |
310 | c3c7a0c1 | Iustin Pop | filter Node.failN1 $ nodes :: Double |
311 | 2060348b | Iustin Pop | res_l = map Node.pRem nodes |
312 | daee4bed | Iustin Pop | -- metric: reserved memory covariance |
313 | 4715711d | Iustin Pop | res_cv = stdDev res_l |
314 | e4d31268 | Iustin Pop | -- offline instances metrics |
315 | e4d31268 | Iustin Pop | offline_ipri = sum . map (length . Node.pList) $ offline |
316 | e4d31268 | Iustin Pop | offline_isec = sum . map (length . Node.sList) $ offline |
317 | e4d31268 | Iustin Pop | -- metric: count of instances on offline nodes |
318 | e4d31268 | Iustin Pop | off_score = fromIntegral (offline_ipri + offline_isec)::Double |
319 | 673f0f00 | Iustin Pop | -- metric: count of primary instances on offline nodes (this |
320 | 673f0f00 | Iustin Pop | -- helps with evacuation/failover of primary instances on |
321 | 673f0f00 | Iustin Pop | -- 2-node clusters with one node offline) |
322 | 673f0f00 | Iustin Pop | off_pri_score = fromIntegral offline_ipri::Double |
323 | 2060348b | Iustin Pop | cpu_l = map Node.pCpu nodes |
324 | daee4bed | Iustin Pop | -- metric: covariance of vcpu/pcpu ratio |
325 | 4715711d | Iustin Pop | cpu_cv = stdDev cpu_l |
326 | daee4bed | Iustin Pop | -- metrics: covariance of cpu, memory, disk and network load |
327 | ee9724b9 | Iustin Pop | (c_load, m_load, d_load, n_load) = unzip4 $ |
328 | ee9724b9 | Iustin Pop | map (\n -> |
329 | ee9724b9 | Iustin Pop | let DynUtil c1 m1 d1 n1 = Node.utilLoad n |
330 | ee9724b9 | Iustin Pop | DynUtil c2 m2 d2 n2 = Node.utilPool n |
331 | ee9724b9 | Iustin Pop | in (c1/c2, m1/m2, d1/d2, n1/n2) |
332 | ee9724b9 | Iustin Pop | ) nodes |
333 | d844fe88 | Iustin Pop | -- metric: conflicting instance count |
334 | d844fe88 | Iustin Pop | pri_tags_inst = sum $ map Node.conflictingPrimaries nodes |
335 | d844fe88 | Iustin Pop | pri_tags_score = fromIntegral pri_tags_inst::Double |
336 | 673f0f00 | Iustin Pop | in [ mem_cv, dsk_cv, n1_score, res_cv, off_score, off_pri_score, cpu_cv |
337 | 4715711d | Iustin Pop | , stdDev c_load, stdDev m_load , stdDev d_load, stdDev n_load |
338 | d844fe88 | Iustin Pop | , pri_tags_score ] |
339 | 9188aeef | Iustin Pop | |
340 | 9188aeef | Iustin Pop | -- | Compute the /total/ variance. |
341 | 9bb5721c | Iustin Pop | compCVNodes :: [Node.Node] -> Double |
342 | 9bb5721c | Iustin Pop | compCVNodes = sum . zipWith (*) detailedCVWeights . compDetailedCV |
343 | 9bb5721c | Iustin Pop | |
344 | 9bb5721c | Iustin Pop | -- | Wrapper over 'compCVNodes' for callers that have a 'Node.List'. |
345 | 9188aeef | Iustin Pop | compCV :: Node.List -> Double |
346 | 9bb5721c | Iustin Pop | compCV = compCVNodes . Container.elems |
347 | 9bb5721c | Iustin Pop | |
348 | 525bfb36 | Iustin Pop | -- | Compute online nodes from a 'Node.List'. |
349 | dbba5246 | Iustin Pop | getOnline :: Node.List -> [Node.Node] |
350 | dbba5246 | Iustin Pop | getOnline = filter (not . Node.offline) . Container.elems |
351 | dbba5246 | Iustin Pop | |
352 | 525bfb36 | Iustin Pop | -- * Balancing functions |
353 | 9188aeef | Iustin Pop | |
354 | 9188aeef | Iustin Pop | -- | Compute best table. Note that the ordering of the arguments is important. |
355 | 9188aeef | Iustin Pop | compareTables :: Table -> Table -> Table |
356 | 9188aeef | Iustin Pop | compareTables a@(Table _ _ a_cv _) b@(Table _ _ b_cv _ ) = |
357 | 9188aeef | Iustin Pop | if a_cv > b_cv then b else a |
358 | 9188aeef | Iustin Pop | |
359 | 9188aeef | Iustin Pop | -- | Applies an instance move to a given node list and instance. |
360 | 262a08a2 | Iustin Pop | applyMove :: Node.List -> Instance.Instance |
361 | 8880d889 | Iustin Pop | -> IMove -> OpResult (Node.List, Instance.Instance, Ndx, Ndx) |
362 | 00b51a14 | Iustin Pop | -- Failover (f) |
363 | e4f08c46 | Iustin Pop | applyMove nl inst Failover = |
364 | 2060348b | Iustin Pop | let old_pdx = Instance.pNode inst |
365 | 2060348b | Iustin Pop | old_sdx = Instance.sNode inst |
366 | e4f08c46 | Iustin Pop | old_p = Container.find old_pdx nl |
367 | e4f08c46 | Iustin Pop | old_s = Container.find old_sdx nl |
368 | e4f08c46 | Iustin Pop | int_p = Node.removePri old_p inst |
369 | e4f08c46 | Iustin Pop | int_s = Node.removeSec old_s inst |
370 | 2cae47e9 | Iustin Pop | force_p = Node.offline old_p |
371 | b161386d | Iustin Pop | new_nl = do -- Maybe monad |
372 | 2cae47e9 | Iustin Pop | new_p <- Node.addPriEx force_p int_s inst |
373 | b161386d | Iustin Pop | new_s <- Node.addSec int_p inst old_sdx |
374 | 8880d889 | Iustin Pop | let new_inst = Instance.setBoth inst old_sdx old_pdx |
375 | 8880d889 | Iustin Pop | return (Container.addTwo old_pdx new_s old_sdx new_p nl, |
376 | 8880d889 | Iustin Pop | new_inst, old_sdx, old_pdx) |
377 | 8880d889 | Iustin Pop | in new_nl |
378 | e4f08c46 | Iustin Pop | |
379 | 00b51a14 | Iustin Pop | -- Replace the primary (f:, r:np, f) |
380 | e4f08c46 | Iustin Pop | applyMove nl inst (ReplacePrimary new_pdx) = |
381 | 2060348b | Iustin Pop | let old_pdx = Instance.pNode inst |
382 | 2060348b | Iustin Pop | old_sdx = Instance.sNode inst |
383 | e4f08c46 | Iustin Pop | old_p = Container.find old_pdx nl |
384 | e4f08c46 | Iustin Pop | old_s = Container.find old_sdx nl |
385 | e4f08c46 | Iustin Pop | tgt_n = Container.find new_pdx nl |
386 | e4f08c46 | Iustin Pop | int_p = Node.removePri old_p inst |
387 | e4f08c46 | Iustin Pop | int_s = Node.removeSec old_s inst |
388 | 2cae47e9 | Iustin Pop | force_p = Node.offline old_p |
389 | b161386d | Iustin Pop | new_nl = do -- Maybe monad |
390 | 70db354e | Iustin Pop | -- check that the current secondary can host the instance |
391 | 70db354e | Iustin Pop | -- during the migration |
392 | 2cae47e9 | Iustin Pop | tmp_s <- Node.addPriEx force_p int_s inst |
393 | 70db354e | Iustin Pop | let tmp_s' = Node.removePri tmp_s inst |
394 | 2cae47e9 | Iustin Pop | new_p <- Node.addPriEx force_p tgt_n inst |
395 | 2cae47e9 | Iustin Pop | new_s <- Node.addSecEx force_p tmp_s' inst new_pdx |
396 | 8880d889 | Iustin Pop | let new_inst = Instance.setPri inst new_pdx |
397 | 8880d889 | Iustin Pop | return (Container.add new_pdx new_p $ |
398 | 8880d889 | Iustin Pop | Container.addTwo old_pdx int_p old_sdx new_s nl, |
399 | 8880d889 | Iustin Pop | new_inst, new_pdx, old_sdx) |
400 | 8880d889 | Iustin Pop | in new_nl |
401 | e4f08c46 | Iustin Pop | |
402 | 00b51a14 | Iustin Pop | -- Replace the secondary (r:ns) |
403 | e4f08c46 | Iustin Pop | applyMove nl inst (ReplaceSecondary new_sdx) = |
404 | 2060348b | Iustin Pop | let old_pdx = Instance.pNode inst |
405 | 2060348b | Iustin Pop | old_sdx = Instance.sNode inst |
406 | e4f08c46 | Iustin Pop | old_s = Container.find old_sdx nl |
407 | e4f08c46 | Iustin Pop | tgt_n = Container.find new_sdx nl |
408 | e4f08c46 | Iustin Pop | int_s = Node.removeSec old_s inst |
409 | 2cae47e9 | Iustin Pop | force_s = Node.offline old_s |
410 | 8880d889 | Iustin Pop | new_inst = Instance.setSec inst new_sdx |
411 | 2cae47e9 | Iustin Pop | new_nl = Node.addSecEx force_s tgt_n inst old_pdx >>= |
412 | 8880d889 | Iustin Pop | \new_s -> return (Container.addTwo new_sdx |
413 | 8880d889 | Iustin Pop | new_s old_sdx int_s nl, |
414 | 8880d889 | Iustin Pop | new_inst, old_pdx, new_sdx) |
415 | 8880d889 | Iustin Pop | in new_nl |
416 | e4f08c46 | Iustin Pop | |
417 | 00b51a14 | Iustin Pop | -- Replace the secondary and failover (r:np, f) |
418 | 79ac6b6f | Iustin Pop | applyMove nl inst (ReplaceAndFailover new_pdx) = |
419 | 2060348b | Iustin Pop | let old_pdx = Instance.pNode inst |
420 | 2060348b | Iustin Pop | old_sdx = Instance.sNode inst |
421 | 79ac6b6f | Iustin Pop | old_p = Container.find old_pdx nl |
422 | 79ac6b6f | Iustin Pop | old_s = Container.find old_sdx nl |
423 | 79ac6b6f | Iustin Pop | tgt_n = Container.find new_pdx nl |
424 | 79ac6b6f | Iustin Pop | int_p = Node.removePri old_p inst |
425 | 79ac6b6f | Iustin Pop | int_s = Node.removeSec old_s inst |
426 | 2cae47e9 | Iustin Pop | force_s = Node.offline old_s |
427 | b161386d | Iustin Pop | new_nl = do -- Maybe monad |
428 | b161386d | Iustin Pop | new_p <- Node.addPri tgt_n inst |
429 | 2cae47e9 | Iustin Pop | new_s <- Node.addSecEx force_s int_p inst new_pdx |
430 | 8880d889 | Iustin Pop | let new_inst = Instance.setBoth inst new_pdx old_pdx |
431 | 8880d889 | Iustin Pop | return (Container.add new_pdx new_p $ |
432 | 8880d889 | Iustin Pop | Container.addTwo old_pdx new_s old_sdx int_s nl, |
433 | 8880d889 | Iustin Pop | new_inst, new_pdx, old_pdx) |
434 | 8880d889 | Iustin Pop | in new_nl |
435 | 79ac6b6f | Iustin Pop | |
436 | 19493d33 | Iustin Pop | -- Failver and replace the secondary (f, r:ns) |
437 | 19493d33 | Iustin Pop | applyMove nl inst (FailoverAndReplace new_sdx) = |
438 | 2060348b | Iustin Pop | let old_pdx = Instance.pNode inst |
439 | 2060348b | Iustin Pop | old_sdx = Instance.sNode inst |
440 | 19493d33 | Iustin Pop | old_p = Container.find old_pdx nl |
441 | 19493d33 | Iustin Pop | old_s = Container.find old_sdx nl |
442 | 19493d33 | Iustin Pop | tgt_n = Container.find new_sdx nl |
443 | 19493d33 | Iustin Pop | int_p = Node.removePri old_p inst |
444 | 19493d33 | Iustin Pop | int_s = Node.removeSec old_s inst |
445 | 2cae47e9 | Iustin Pop | force_p = Node.offline old_p |
446 | b161386d | Iustin Pop | new_nl = do -- Maybe monad |
447 | 2cae47e9 | Iustin Pop | new_p <- Node.addPriEx force_p int_s inst |
448 | 2cae47e9 | Iustin Pop | new_s <- Node.addSecEx force_p tgt_n inst old_sdx |
449 | 8880d889 | Iustin Pop | let new_inst = Instance.setBoth inst old_sdx new_sdx |
450 | 8880d889 | Iustin Pop | return (Container.add new_sdx new_s $ |
451 | 8880d889 | Iustin Pop | Container.addTwo old_sdx new_p old_pdx int_p nl, |
452 | 8880d889 | Iustin Pop | new_inst, old_sdx, new_sdx) |
453 | 8880d889 | Iustin Pop | in new_nl |
454 | 19493d33 | Iustin Pop | |
455 | 9188aeef | Iustin Pop | -- | Tries to allocate an instance on one given node. |
456 | 0d66ea67 | Iustin Pop | allocateOnSingle :: Node.List -> Instance.Instance -> Ndx |
457 | 1fe81531 | Iustin Pop | -> OpResult Node.AllocElement |
458 | 0d66ea67 | Iustin Pop | allocateOnSingle nl inst new_pdx = |
459 | 0d66ea67 | Iustin Pop | let p = Container.find new_pdx nl |
460 | 8880d889 | Iustin Pop | new_inst = Instance.setBoth inst new_pdx Node.noSecondary |
461 | 7d3f4253 | Iustin Pop | in Node.addPri p inst >>= \new_p -> do |
462 | 7d3f4253 | Iustin Pop | let new_nl = Container.add new_pdx new_p nl |
463 | 7d3f4253 | Iustin Pop | new_score = compCV nl |
464 | 7d3f4253 | Iustin Pop | return (new_nl, new_inst, [new_p], new_score) |
465 | 5e15f460 | Iustin Pop | |
466 | 9188aeef | Iustin Pop | -- | Tries to allocate an instance on a given pair of nodes. |
467 | 0d66ea67 | Iustin Pop | allocateOnPair :: Node.List -> Instance.Instance -> Ndx -> Ndx |
468 | 1fe81531 | Iustin Pop | -> OpResult Node.AllocElement |
469 | 0d66ea67 | Iustin Pop | allocateOnPair nl inst new_pdx new_sdx = |
470 | 0d66ea67 | Iustin Pop | let tgt_p = Container.find new_pdx nl |
471 | 0d66ea67 | Iustin Pop | tgt_s = Container.find new_sdx nl |
472 | 7d3f4253 | Iustin Pop | in do |
473 | 7d3f4253 | Iustin Pop | new_p <- Node.addPri tgt_p inst |
474 | 7d3f4253 | Iustin Pop | new_s <- Node.addSec tgt_s inst new_pdx |
475 | 7d3f4253 | Iustin Pop | let new_inst = Instance.setBoth inst new_pdx new_sdx |
476 | 7d3f4253 | Iustin Pop | new_nl = Container.addTwo new_pdx new_p new_sdx new_s nl |
477 | 7d3f4253 | Iustin Pop | return (new_nl, new_inst, [new_p, new_s], compCV new_nl) |
478 | 4a340313 | Iustin Pop | |
479 | 9188aeef | Iustin Pop | -- | Tries to perform an instance move and returns the best table |
480 | 9188aeef | Iustin Pop | -- between the original one and the new one. |
481 | e4f08c46 | Iustin Pop | checkSingleStep :: Table -- ^ The original table |
482 | e4f08c46 | Iustin Pop | -> Instance.Instance -- ^ The instance to move |
483 | e4f08c46 | Iustin Pop | -> Table -- ^ The current best table |
484 | e4f08c46 | Iustin Pop | -> IMove -- ^ The move to apply |
485 | e4f08c46 | Iustin Pop | -> Table -- ^ The final best table |
486 | e4f08c46 | Iustin Pop | checkSingleStep ini_tbl target cur_tbl move = |
487 | e4f08c46 | Iustin Pop | let |
488 | e4f08c46 | Iustin Pop | Table ini_nl ini_il _ ini_plc = ini_tbl |
489 | 8880d889 | Iustin Pop | tmp_resu = applyMove ini_nl target move |
490 | e4f08c46 | Iustin Pop | in |
491 | 8880d889 | Iustin Pop | case tmp_resu of |
492 | f2280553 | Iustin Pop | OpFail _ -> cur_tbl |
493 | 3173c987 | Iustin Pop | OpGood (upd_nl, new_inst, pri_idx, sec_idx) -> |
494 | f2280553 | Iustin Pop | let tgt_idx = Instance.idx target |
495 | f2280553 | Iustin Pop | upd_cvar = compCV upd_nl |
496 | f2280553 | Iustin Pop | upd_il = Container.add tgt_idx new_inst ini_il |
497 | 3173c987 | Iustin Pop | upd_plc = (tgt_idx, pri_idx, sec_idx, move, upd_cvar):ini_plc |
498 | f2280553 | Iustin Pop | upd_tbl = Table upd_nl upd_il upd_cvar upd_plc |
499 | f2280553 | Iustin Pop | in |
500 | f2280553 | Iustin Pop | compareTables cur_tbl upd_tbl |
501 | e4f08c46 | Iustin Pop | |
502 | c0501c69 | Iustin Pop | -- | Given the status of the current secondary as a valid new node and |
503 | c0501c69 | Iustin Pop | -- the current candidate target node, generate the possible moves for |
504 | c0501c69 | Iustin Pop | -- a instance. |
505 | c0501c69 | Iustin Pop | possibleMoves :: Bool -- ^ Whether the secondary node is a valid new node |
506 | e08424a8 | Guido Trotter | -> Bool -- ^ Whether we can change the primary node |
507 | c0501c69 | Iustin Pop | -> Ndx -- ^ Target node candidate |
508 | c0501c69 | Iustin Pop | -> [IMove] -- ^ List of valid result moves |
509 | e08424a8 | Guido Trotter | |
510 | e08424a8 | Guido Trotter | possibleMoves _ False tdx = |
511 | e08424a8 | Guido Trotter | [ReplaceSecondary tdx] |
512 | e08424a8 | Guido Trotter | |
513 | e08424a8 | Guido Trotter | possibleMoves True True tdx = |
514 | 40d4eba0 | Iustin Pop | [ReplaceSecondary tdx, |
515 | 40d4eba0 | Iustin Pop | ReplaceAndFailover tdx, |
516 | 40d4eba0 | Iustin Pop | ReplacePrimary tdx, |
517 | 40d4eba0 | Iustin Pop | FailoverAndReplace tdx] |
518 | 40d4eba0 | Iustin Pop | |
519 | e08424a8 | Guido Trotter | possibleMoves False True tdx = |
520 | 40d4eba0 | Iustin Pop | [ReplaceSecondary tdx, |
521 | 40d4eba0 | Iustin Pop | ReplaceAndFailover tdx] |
522 | 40d4eba0 | Iustin Pop | |
523 | 40d4eba0 | Iustin Pop | -- | Compute the best move for a given instance. |
524 | c0501c69 | Iustin Pop | checkInstanceMove :: [Ndx] -- ^ Allowed target node indices |
525 | c0501c69 | Iustin Pop | -> Bool -- ^ Whether disk moves are allowed |
526 | e08424a8 | Guido Trotter | -> Bool -- ^ Whether instance moves are allowed |
527 | c0501c69 | Iustin Pop | -> Table -- ^ Original table |
528 | c0501c69 | Iustin Pop | -> Instance.Instance -- ^ Instance to move |
529 | c0501c69 | Iustin Pop | -> Table -- ^ Best new table for this instance |
530 | e08424a8 | Guido Trotter | checkInstanceMove nodes_idx disk_moves inst_moves ini_tbl target = |
531 | 4e25d1c2 | Iustin Pop | let |
532 | 2060348b | Iustin Pop | opdx = Instance.pNode target |
533 | 2060348b | Iustin Pop | osdx = Instance.sNode target |
534 | 9dc6023f | Iustin Pop | nodes = filter (\idx -> idx /= opdx && idx /= osdx) nodes_idx |
535 | e08424a8 | Guido Trotter | use_secondary = elem osdx nodes_idx && inst_moves |
536 | 40d4eba0 | Iustin Pop | aft_failover = if use_secondary -- if allowed to failover |
537 | 40d4eba0 | Iustin Pop | then checkSingleStep ini_tbl target ini_tbl Failover |
538 | 40d4eba0 | Iustin Pop | else ini_tbl |
539 | c0501c69 | Iustin Pop | all_moves = if disk_moves |
540 | e08424a8 | Guido Trotter | then concatMap |
541 | e08424a8 | Guido Trotter | (possibleMoves use_secondary inst_moves) nodes |
542 | c0501c69 | Iustin Pop | else [] |
543 | 4e25d1c2 | Iustin Pop | in |
544 | 4e25d1c2 | Iustin Pop | -- iterate over the possible nodes for this instance |
545 | 9dc6023f | Iustin Pop | foldl' (checkSingleStep ini_tbl target) aft_failover all_moves |
546 | 4e25d1c2 | Iustin Pop | |
547 | e4f08c46 | Iustin Pop | -- | Compute the best next move. |
548 | 608efcce | Iustin Pop | checkMove :: [Ndx] -- ^ Allowed target node indices |
549 | c0501c69 | Iustin Pop | -> Bool -- ^ Whether disk moves are allowed |
550 | e08424a8 | Guido Trotter | -> Bool -- ^ Whether instance moves are allowed |
551 | 256810de | Iustin Pop | -> Table -- ^ The current solution |
552 | e4f08c46 | Iustin Pop | -> [Instance.Instance] -- ^ List of instances still to move |
553 | 256810de | Iustin Pop | -> Table -- ^ The new solution |
554 | e08424a8 | Guido Trotter | checkMove nodes_idx disk_moves inst_moves ini_tbl victims = |
555 | 4e25d1c2 | Iustin Pop | let Table _ _ _ ini_plc = ini_tbl |
556 | a3eee4ad | Iustin Pop | -- we're using rwhnf from the Control.Parallel.Strategies |
557 | a3eee4ad | Iustin Pop | -- package; we don't need to use rnf as that would force too |
558 | a3eee4ad | Iustin Pop | -- much evaluation in single-threaded cases, and in |
559 | a3eee4ad | Iustin Pop | -- multi-threaded case the weak head normal form is enough to |
560 | a3eee4ad | Iustin Pop | -- spark the evaluation |
561 | e08424a8 | Guido Trotter | tables = parMap rwhnf (checkInstanceMove nodes_idx disk_moves |
562 | e08424a8 | Guido Trotter | inst_moves ini_tbl) |
563 | a3eee4ad | Iustin Pop | victims |
564 | 4e25d1c2 | Iustin Pop | -- iterate over all instances, computing the best move |
565 | 2a8e2dc9 | Iustin Pop | best_tbl = foldl' compareTables ini_tbl tables |
566 | aaaa0e43 | Iustin Pop | Table _ _ _ best_plc = best_tbl |
567 | a804261a | Iustin Pop | in if length best_plc == length ini_plc |
568 | a804261a | Iustin Pop | then ini_tbl -- no advancement |
569 | a804261a | Iustin Pop | else best_tbl |
570 | e4f08c46 | Iustin Pop | |
571 | 525bfb36 | Iustin Pop | -- | Check if we are allowed to go deeper in the balancing. |
572 | 3fea6959 | Iustin Pop | doNextBalance :: Table -- ^ The starting table |
573 | 3fea6959 | Iustin Pop | -> Int -- ^ Remaining length |
574 | 3fea6959 | Iustin Pop | -> Score -- ^ Score at which to stop |
575 | 3fea6959 | Iustin Pop | -> Bool -- ^ The resulting table and commands |
576 | 5ad86777 | Iustin Pop | doNextBalance ini_tbl max_rounds min_score = |
577 | 5ad86777 | Iustin Pop | let Table _ _ ini_cv ini_plc = ini_tbl |
578 | 5ad86777 | Iustin Pop | ini_plc_len = length ini_plc |
579 | 5ad86777 | Iustin Pop | in (max_rounds < 0 || ini_plc_len < max_rounds) && ini_cv > min_score |
580 | 5ad86777 | Iustin Pop | |
581 | 525bfb36 | Iustin Pop | -- | Run a balance move. |
582 | f25e5aac | Iustin Pop | tryBalance :: Table -- ^ The starting table |
583 | f25e5aac | Iustin Pop | -> Bool -- ^ Allow disk moves |
584 | e08424a8 | Guido Trotter | -> Bool -- ^ Allow instance moves |
585 | 2e28ac32 | Iustin Pop | -> Bool -- ^ Only evacuate moves |
586 | 848b65c9 | Iustin Pop | -> Score -- ^ Min gain threshold |
587 | 848b65c9 | Iustin Pop | -> Score -- ^ Min gain |
588 | f25e5aac | Iustin Pop | -> Maybe Table -- ^ The resulting table and commands |
589 | e08424a8 | Guido Trotter | tryBalance ini_tbl disk_moves inst_moves evac_mode mg_limit min_gain = |
590 | 5ad86777 | Iustin Pop | let Table ini_nl ini_il ini_cv _ = ini_tbl |
591 | 5ad86777 | Iustin Pop | all_inst = Container.elems ini_il |
592 | 2e28ac32 | Iustin Pop | all_inst' = if evac_mode |
593 | 2e28ac32 | Iustin Pop | then let bad_nodes = map Node.idx . filter Node.offline $ |
594 | 2e28ac32 | Iustin Pop | Container.elems ini_nl |
595 | 77ecfa82 | Iustin Pop | in filter (any (`elem` bad_nodes) . Instance.allNodes) |
596 | 2e28ac32 | Iustin Pop | all_inst |
597 | 2e28ac32 | Iustin Pop | else all_inst |
598 | c424cdc8 | Iustin Pop | reloc_inst = filter Instance.movable all_inst' |
599 | 5ad86777 | Iustin Pop | node_idx = map Node.idx . filter (not . Node.offline) $ |
600 | 5ad86777 | Iustin Pop | Container.elems ini_nl |
601 | e08424a8 | Guido Trotter | fin_tbl = checkMove node_idx disk_moves inst_moves ini_tbl reloc_inst |
602 | 5ad86777 | Iustin Pop | (Table _ _ fin_cv _) = fin_tbl |
603 | f25e5aac | Iustin Pop | in |
604 | 848b65c9 | Iustin Pop | if fin_cv < ini_cv && (ini_cv > mg_limit || ini_cv - fin_cv >= min_gain) |
605 | 5ad86777 | Iustin Pop | then Just fin_tbl -- this round made success, return the new table |
606 | f25e5aac | Iustin Pop | else Nothing |
607 | f25e5aac | Iustin Pop | |
608 | 478df686 | Iustin Pop | -- * Allocation functions |
609 | 478df686 | Iustin Pop | |
610 | 525bfb36 | Iustin Pop | -- | Build failure stats out of a list of failures. |
611 | 478df686 | Iustin Pop | collapseFailures :: [FailMode] -> FailStats |
612 | 478df686 | Iustin Pop | collapseFailures flst = |
613 | b4bae394 | Iustin Pop | map (\k -> (k, foldl' (\a e -> if e == k then a + 1 else a) 0 flst)) |
614 | b4bae394 | Iustin Pop | [minBound..maxBound] |
615 | 478df686 | Iustin Pop | |
616 | d7339c99 | Iustin Pop | -- | Compares two Maybe AllocElement and chooses the besst score. |
617 | d7339c99 | Iustin Pop | bestAllocElement :: Maybe Node.AllocElement |
618 | d7339c99 | Iustin Pop | -> Maybe Node.AllocElement |
619 | d7339c99 | Iustin Pop | -> Maybe Node.AllocElement |
620 | d7339c99 | Iustin Pop | bestAllocElement a Nothing = a |
621 | d7339c99 | Iustin Pop | bestAllocElement Nothing b = b |
622 | d7339c99 | Iustin Pop | bestAllocElement a@(Just (_, _, _, ascore)) b@(Just (_, _, _, bscore)) = |
623 | d7339c99 | Iustin Pop | if ascore < bscore then a else b |
624 | d7339c99 | Iustin Pop | |
625 | 478df686 | Iustin Pop | -- | Update current Allocation solution and failure stats with new |
626 | 525bfb36 | Iustin Pop | -- elements. |
627 | 1fe81531 | Iustin Pop | concatAllocs :: AllocSolution -> OpResult Node.AllocElement -> AllocSolution |
628 | 85d0ddc3 | Iustin Pop | concatAllocs as (OpFail reason) = as { asFailures = reason : asFailures as } |
629 | 478df686 | Iustin Pop | |
630 | d7339c99 | Iustin Pop | concatAllocs as (OpGood ns) = |
631 | 7d3f4253 | Iustin Pop | let -- Choose the old or new solution, based on the cluster score |
632 | 85d0ddc3 | Iustin Pop | cntok = asAllocs as |
633 | 129734d3 | Iustin Pop | osols = asSolution as |
634 | d7339c99 | Iustin Pop | nsols = bestAllocElement osols (Just ns) |
635 | fbb95f28 | Iustin Pop | nsuc = cntok + 1 |
636 | 478df686 | Iustin Pop | -- Note: we force evaluation of nsols here in order to keep the |
637 | 478df686 | Iustin Pop | -- memory profile low - we know that we will need nsols for sure |
638 | 478df686 | Iustin Pop | -- in the next cycle, so we force evaluation of nsols, since the |
639 | 478df686 | Iustin Pop | -- foldl' in the caller will only evaluate the tuple, but not the |
640 | 7d11799b | Iustin Pop | -- elements of the tuple |
641 | 129734d3 | Iustin Pop | in nsols `seq` nsuc `seq` as { asAllocs = nsuc, asSolution = nsols } |
642 | dbba5246 | Iustin Pop | |
643 | f828f4aa | Iustin Pop | -- | Sums two 'AllocSolution' structures. |
644 | f828f4aa | Iustin Pop | sumAllocs :: AllocSolution -> AllocSolution -> AllocSolution |
645 | f828f4aa | Iustin Pop | sumAllocs (AllocSolution aFails aAllocs aSols aLog) |
646 | f828f4aa | Iustin Pop | (AllocSolution bFails bAllocs bSols bLog) = |
647 | f828f4aa | Iustin Pop | -- note: we add b first, since usually it will be smaller; when |
648 | f828f4aa | Iustin Pop | -- fold'ing, a will grow and grow whereas b is the per-group |
649 | f828f4aa | Iustin Pop | -- result, hence smaller |
650 | f828f4aa | Iustin Pop | let nFails = bFails ++ aFails |
651 | f828f4aa | Iustin Pop | nAllocs = aAllocs + bAllocs |
652 | f828f4aa | Iustin Pop | nSols = bestAllocElement aSols bSols |
653 | f828f4aa | Iustin Pop | nLog = bLog ++ aLog |
654 | f828f4aa | Iustin Pop | in AllocSolution nFails nAllocs nSols nLog |
655 | f828f4aa | Iustin Pop | |
656 | 525bfb36 | Iustin Pop | -- | Given a solution, generates a reasonable description for it. |
657 | 859fc11d | Iustin Pop | describeSolution :: AllocSolution -> String |
658 | 859fc11d | Iustin Pop | describeSolution as = |
659 | 859fc11d | Iustin Pop | let fcnt = asFailures as |
660 | 129734d3 | Iustin Pop | sols = asSolution as |
661 | 859fc11d | Iustin Pop | freasons = |
662 | 859fc11d | Iustin Pop | intercalate ", " . map (\(a, b) -> printf "%s: %d" (show a) b) . |
663 | 859fc11d | Iustin Pop | filter ((> 0) . snd) . collapseFailures $ fcnt |
664 | 129734d3 | Iustin Pop | in case sols of |
665 | 129734d3 | Iustin Pop | Nothing -> "No valid allocation solutions, failure reasons: " ++ |
666 | 129734d3 | Iustin Pop | (if null fcnt then "unknown reasons" else freasons) |
667 | 129734d3 | Iustin Pop | Just (_, _, nodes, cv) -> |
668 | 129734d3 | Iustin Pop | printf ("score: %.8f, successes %d, failures %d (%s)" ++ |
669 | 129734d3 | Iustin Pop | " for node(s) %s") cv (asAllocs as) (length fcnt) freasons |
670 | 129734d3 | Iustin Pop | (intercalate "/" . map Node.name $ nodes) |
671 | 859fc11d | Iustin Pop | |
672 | 525bfb36 | Iustin Pop | -- | Annotates a solution with the appropriate string. |
673 | 859fc11d | Iustin Pop | annotateSolution :: AllocSolution -> AllocSolution |
674 | 859fc11d | Iustin Pop | annotateSolution as = as { asLog = describeSolution as : asLog as } |
675 | 859fc11d | Iustin Pop | |
676 | 47eed3f4 | Iustin Pop | -- | Reverses an evacuation solution. |
677 | 47eed3f4 | Iustin Pop | -- |
678 | 47eed3f4 | Iustin Pop | -- Rationale: we always concat the results to the top of the lists, so |
679 | 47eed3f4 | Iustin Pop | -- for proper jobset execution, we should reverse all lists. |
680 | 47eed3f4 | Iustin Pop | reverseEvacSolution :: EvacSolution -> EvacSolution |
681 | 47eed3f4 | Iustin Pop | reverseEvacSolution (EvacSolution f m o) = |
682 | 47eed3f4 | Iustin Pop | EvacSolution (reverse f) (reverse m) (reverse o) |
683 | 47eed3f4 | Iustin Pop | |
684 | 6cb1649f | Iustin Pop | -- | Generate the valid node allocation singles or pairs for a new instance. |
685 | 6d0bc5ca | Iustin Pop | genAllocNodes :: Group.List -- ^ Group list |
686 | 6d0bc5ca | Iustin Pop | -> Node.List -- ^ The node map |
687 | 6cb1649f | Iustin Pop | -> Int -- ^ The number of nodes required |
688 | 6d0bc5ca | Iustin Pop | -> Bool -- ^ Whether to drop or not |
689 | 6d0bc5ca | Iustin Pop | -- unallocable nodes |
690 | 6cb1649f | Iustin Pop | -> Result AllocNodes -- ^ The (monadic) result |
691 | 6d0bc5ca | Iustin Pop | genAllocNodes gl nl count drop_unalloc = |
692 | 6d0bc5ca | Iustin Pop | let filter_fn = if drop_unalloc |
693 | e4491427 | Iustin Pop | then filter (Group.isAllocable . |
694 | e4491427 | Iustin Pop | flip Container.find gl . Node.group) |
695 | 6d0bc5ca | Iustin Pop | else id |
696 | 6d0bc5ca | Iustin Pop | all_nodes = filter_fn $ getOnline nl |
697 | b0631f10 | Iustin Pop | all_pairs = [(Node.idx p, |
698 | b0631f10 | Iustin Pop | [Node.idx s | s <- all_nodes, |
699 | b0631f10 | Iustin Pop | Node.idx p /= Node.idx s, |
700 | b0631f10 | Iustin Pop | Node.group p == Node.group s]) | |
701 | b0631f10 | Iustin Pop | p <- all_nodes] |
702 | 6cb1649f | Iustin Pop | in case count of |
703 | 0d66ea67 | Iustin Pop | 1 -> Ok (Left (map Node.idx all_nodes)) |
704 | b0631f10 | Iustin Pop | 2 -> Ok (Right (filter (not . null . snd) all_pairs)) |
705 | 6cb1649f | Iustin Pop | _ -> Bad "Unsupported number of nodes, only one or two supported" |
706 | 6cb1649f | Iustin Pop | |
707 | dbba5246 | Iustin Pop | -- | Try to allocate an instance on the cluster. |
708 | dbba5246 | Iustin Pop | tryAlloc :: (Monad m) => |
709 | dbba5246 | Iustin Pop | Node.List -- ^ The node list |
710 | dbba5246 | Iustin Pop | -> Instance.List -- ^ The instance list |
711 | dbba5246 | Iustin Pop | -> Instance.Instance -- ^ The instance to allocate |
712 | 6cb1649f | Iustin Pop | -> AllocNodes -- ^ The allocation targets |
713 | 78694255 | Iustin Pop | -> m AllocSolution -- ^ Possible solution list |
714 | 1bf6d813 | Iustin Pop | tryAlloc _ _ _ (Right []) = fail "Not enough online nodes" |
715 | 6cb1649f | Iustin Pop | tryAlloc nl _ inst (Right ok_pairs) = |
716 | b0631f10 | Iustin Pop | let psols = parMap rwhnf (\(p, ss) -> |
717 | b0631f10 | Iustin Pop | foldl' (\cstate -> |
718 | b0631f10 | Iustin Pop | concatAllocs cstate . |
719 | b0631f10 | Iustin Pop | allocateOnPair nl inst p) |
720 | b0631f10 | Iustin Pop | emptyAllocSolution ss) ok_pairs |
721 | f828f4aa | Iustin Pop | sols = foldl' sumAllocs emptyAllocSolution psols |
722 | 1bf6d813 | Iustin Pop | in return $ annotateSolution sols |
723 | dbba5246 | Iustin Pop | |
724 | 1bf6d813 | Iustin Pop | tryAlloc _ _ _ (Left []) = fail "No online nodes" |
725 | 6cb1649f | Iustin Pop | tryAlloc nl _ inst (Left all_nodes) = |
726 | 6cb1649f | Iustin Pop | let sols = foldl' (\cstate -> |
727 | 2485487d | Iustin Pop | concatAllocs cstate . allocateOnSingle nl inst |
728 | 97936d51 | Iustin Pop | ) emptyAllocSolution all_nodes |
729 | 1bf6d813 | Iustin Pop | in return $ annotateSolution sols |
730 | dbba5246 | Iustin Pop | |
731 | 525bfb36 | Iustin Pop | -- | Given a group/result, describe it as a nice (list of) messages. |
732 | aec636b9 | Iustin Pop | solutionDescription :: Group.List -> (Gdx, Result AllocSolution) -> [String] |
733 | aec636b9 | Iustin Pop | solutionDescription gl (groupId, result) = |
734 | 9b1584fc | Iustin Pop | case result of |
735 | 73206d0a | Iustin Pop | Ok solution -> map (printf "Group %s (%s): %s" gname pol) (asLog solution) |
736 | aec636b9 | Iustin Pop | Bad message -> [printf "Group %s: error %s" gname message] |
737 | 73206d0a | Iustin Pop | where grp = Container.find groupId gl |
738 | 73206d0a | Iustin Pop | gname = Group.name grp |
739 | 5f828ce4 | Agata Murawska | pol = allocPolicyToRaw (Group.allocPolicy grp) |
740 | 9b1584fc | Iustin Pop | |
741 | 9b1584fc | Iustin Pop | -- | From a list of possibly bad and possibly empty solutions, filter |
742 | 88253d03 | Iustin Pop | -- only the groups with a valid result. Note that the result will be |
743 | 525bfb36 | Iustin Pop | -- reversed compared to the original list. |
744 | 73206d0a | Iustin Pop | filterMGResults :: Group.List |
745 | 73206d0a | Iustin Pop | -> [(Gdx, Result AllocSolution)] |
746 | 73206d0a | Iustin Pop | -> [(Gdx, AllocSolution)] |
747 | 88253d03 | Iustin Pop | filterMGResults gl = foldl' fn [] |
748 | 88253d03 | Iustin Pop | where unallocable = not . Group.isAllocable . flip Container.find gl |
749 | 88253d03 | Iustin Pop | fn accu (gdx, rasol) = |
750 | 88253d03 | Iustin Pop | case rasol of |
751 | 88253d03 | Iustin Pop | Bad _ -> accu |
752 | 129734d3 | Iustin Pop | Ok sol | isNothing (asSolution sol) -> accu |
753 | 88253d03 | Iustin Pop | | unallocable gdx -> accu |
754 | 88253d03 | Iustin Pop | | otherwise -> (gdx, sol):accu |
755 | 9b1584fc | Iustin Pop | |
756 | 525bfb36 | Iustin Pop | -- | Sort multigroup results based on policy and score. |
757 | 73206d0a | Iustin Pop | sortMGResults :: Group.List |
758 | 73206d0a | Iustin Pop | -> [(Gdx, AllocSolution)] |
759 | 73206d0a | Iustin Pop | -> [(Gdx, AllocSolution)] |
760 | 73206d0a | Iustin Pop | sortMGResults gl sols = |
761 | 2a8e2dc9 | Iustin Pop | let extractScore (_, _, _, x) = x |
762 | 73206d0a | Iustin Pop | solScore (gdx, sol) = (Group.allocPolicy (Container.find gdx gl), |
763 | 129734d3 | Iustin Pop | (extractScore . fromJust . asSolution) sol) |
764 | 73206d0a | Iustin Pop | in sortBy (comparing solScore) sols |
765 | 73206d0a | Iustin Pop | |
766 | 8fd09137 | Iustin Pop | -- | Finds the best group for an instance on a multi-group cluster. |
767 | d72ff6c3 | Iustin Pop | -- |
768 | d72ff6c3 | Iustin Pop | -- Only solutions in @preferred@ and @last_resort@ groups will be |
769 | d72ff6c3 | Iustin Pop | -- accepted as valid, and additionally if the allowed groups parameter |
770 | d72ff6c3 | Iustin Pop | -- is not null then allocation will only be run for those group |
771 | d72ff6c3 | Iustin Pop | -- indices. |
772 | 8fd09137 | Iustin Pop | findBestAllocGroup :: Group.List -- ^ The group list |
773 | 8fd09137 | Iustin Pop | -> Node.List -- ^ The node list |
774 | 8fd09137 | Iustin Pop | -> Instance.List -- ^ The instance list |
775 | d72ff6c3 | Iustin Pop | -> Maybe [Gdx] -- ^ The allowed groups |
776 | 8fd09137 | Iustin Pop | -> Instance.Instance -- ^ The instance to allocate |
777 | 8fd09137 | Iustin Pop | -> Int -- ^ Required number of nodes |
778 | 8fd09137 | Iustin Pop | -> Result (Gdx, AllocSolution, [String]) |
779 | d72ff6c3 | Iustin Pop | findBestAllocGroup mggl mgnl mgil allowed_gdxs inst cnt = |
780 | 9b1584fc | Iustin Pop | let groups = splitCluster mgnl mgil |
781 | d72ff6c3 | Iustin Pop | groups' = maybe groups (\gs -> filter ((`elem` gs) . fst) groups) |
782 | d72ff6c3 | Iustin Pop | allowed_gdxs |
783 | 9b1584fc | Iustin Pop | sols = map (\(gid, (nl, il)) -> |
784 | 6d0bc5ca | Iustin Pop | (gid, genAllocNodes mggl nl cnt False >>= |
785 | 6d0bc5ca | Iustin Pop | tryAlloc nl il inst)) |
786 | d72ff6c3 | Iustin Pop | groups'::[(Gdx, Result AllocSolution)] |
787 | aec636b9 | Iustin Pop | all_msgs = concatMap (solutionDescription mggl) sols |
788 | 73206d0a | Iustin Pop | goodSols = filterMGResults mggl sols |
789 | 73206d0a | Iustin Pop | sortedSols = sortMGResults mggl goodSols |
790 | 9b1584fc | Iustin Pop | in if null sortedSols |
791 | 9b1584fc | Iustin Pop | then Bad $ intercalate ", " all_msgs |
792 | 9b1584fc | Iustin Pop | else let (final_group, final_sol) = head sortedSols |
793 | 8fd09137 | Iustin Pop | in return (final_group, final_sol, all_msgs) |
794 | 8fd09137 | Iustin Pop | |
795 | 8fd09137 | Iustin Pop | -- | Try to allocate an instance on a multi-group cluster. |
796 | 8fd09137 | Iustin Pop | tryMGAlloc :: Group.List -- ^ The group list |
797 | 8fd09137 | Iustin Pop | -> Node.List -- ^ The node list |
798 | 8fd09137 | Iustin Pop | -> Instance.List -- ^ The instance list |
799 | 8fd09137 | Iustin Pop | -> Instance.Instance -- ^ The instance to allocate |
800 | 8fd09137 | Iustin Pop | -> Int -- ^ Required number of nodes |
801 | 8fd09137 | Iustin Pop | -> Result AllocSolution -- ^ Possible solution list |
802 | 8fd09137 | Iustin Pop | tryMGAlloc mggl mgnl mgil inst cnt = do |
803 | 8fd09137 | Iustin Pop | (best_group, solution, all_msgs) <- |
804 | d72ff6c3 | Iustin Pop | findBestAllocGroup mggl mgnl mgil Nothing inst cnt |
805 | 8fd09137 | Iustin Pop | let group_name = Group.name $ Container.find best_group mggl |
806 | 8fd09137 | Iustin Pop | selmsg = "Selected group: " ++ group_name |
807 | 8fd09137 | Iustin Pop | return $ solution { asLog = selmsg:all_msgs } |
808 | 9b1584fc | Iustin Pop | |
809 | 9b1584fc | Iustin Pop | -- | Try to relocate an instance on the cluster. |
810 | dbba5246 | Iustin Pop | tryReloc :: (Monad m) => |
811 | 78694255 | Iustin Pop | Node.List -- ^ The node list |
812 | 78694255 | Iustin Pop | -> Instance.List -- ^ The instance list |
813 | 78694255 | Iustin Pop | -> Idx -- ^ The index of the instance to move |
814 | 478df686 | Iustin Pop | -> Int -- ^ The number of nodes required |
815 | 78694255 | Iustin Pop | -> [Ndx] -- ^ Nodes which should not be used |
816 | 78694255 | Iustin Pop | -> m AllocSolution -- ^ Solution list |
817 | dbba5246 | Iustin Pop | tryReloc nl il xid 1 ex_idx = |
818 | dbba5246 | Iustin Pop | let all_nodes = getOnline nl |
819 | dbba5246 | Iustin Pop | inst = Container.find xid il |
820 | 2060348b | Iustin Pop | ex_idx' = Instance.pNode inst:ex_idx |
821 | dbba5246 | Iustin Pop | valid_nodes = filter (not . flip elem ex_idx' . Node.idx) all_nodes |
822 | dbba5246 | Iustin Pop | valid_idxes = map Node.idx valid_nodes |
823 | 478df686 | Iustin Pop | sols1 = foldl' (\cstate x -> |
824 | fbb95f28 | Iustin Pop | let em = do |
825 | 478df686 | Iustin Pop | (mnl, i, _, _) <- |
826 | 478df686 | Iustin Pop | applyMove nl inst (ReplaceSecondary x) |
827 | 7d3f4253 | Iustin Pop | return (mnl, i, [Container.find x mnl], |
828 | 7d3f4253 | Iustin Pop | compCV mnl) |
829 | fbb95f28 | Iustin Pop | in concatAllocs cstate em |
830 | 97936d51 | Iustin Pop | ) emptyAllocSolution valid_idxes |
831 | dbba5246 | Iustin Pop | in return sols1 |
832 | dbba5246 | Iustin Pop | |
833 | dbba5246 | Iustin Pop | tryReloc _ _ _ reqn _ = fail $ "Unsupported number of relocation \ |
834 | 9f6dcdea | Iustin Pop | \destinations required (" ++ show reqn ++ |
835 | dbba5246 | Iustin Pop | "), only one supported" |
836 | e4f08c46 | Iustin Pop | |
837 | 47eed3f4 | Iustin Pop | -- | Function which fails if the requested mode is change secondary. |
838 | 47eed3f4 | Iustin Pop | -- |
839 | 47eed3f4 | Iustin Pop | -- This is useful since except DRBD, no other disk template can |
840 | 47eed3f4 | Iustin Pop | -- execute change secondary; thus, we can just call this function |
841 | 47eed3f4 | Iustin Pop | -- instead of always checking for secondary mode. After the call to |
842 | 47eed3f4 | Iustin Pop | -- this function, whatever mode we have is just a primary change. |
843 | 47eed3f4 | Iustin Pop | failOnSecondaryChange :: (Monad m) => EvacMode -> DiskTemplate -> m () |
844 | 47eed3f4 | Iustin Pop | failOnSecondaryChange ChangeSecondary dt = |
845 | 5f828ce4 | Agata Murawska | fail $ "Instances with disk template '" ++ diskTemplateToRaw dt ++ |
846 | 47eed3f4 | Iustin Pop | "' can't execute change secondary" |
847 | 47eed3f4 | Iustin Pop | failOnSecondaryChange _ _ = return () |
848 | 47eed3f4 | Iustin Pop | |
849 | 47eed3f4 | Iustin Pop | -- | Run evacuation for a single instance. |
850 | 20b376ff | Iustin Pop | -- |
851 | 20b376ff | Iustin Pop | -- /Note:/ this function should correctly execute both intra-group |
852 | 20b376ff | Iustin Pop | -- evacuations (in all modes) and inter-group evacuations (in the |
853 | 20b376ff | Iustin Pop | -- 'ChangeAll' mode). Of course, this requires that the correct list |
854 | 20b376ff | Iustin Pop | -- of target nodes is passed. |
855 | 47eed3f4 | Iustin Pop | nodeEvacInstance :: Node.List -- ^ The node list (cluster-wide) |
856 | 47eed3f4 | Iustin Pop | -> Instance.List -- ^ Instance list (cluster-wide) |
857 | 47eed3f4 | Iustin Pop | -> EvacMode -- ^ The evacuation mode |
858 | 47eed3f4 | Iustin Pop | -> Instance.Instance -- ^ The instance to be evacuated |
859 | a86fbf36 | Iustin Pop | -> Gdx -- ^ The group we're targetting |
860 | 47eed3f4 | Iustin Pop | -> [Ndx] -- ^ The list of available nodes |
861 | 47eed3f4 | Iustin Pop | -- for allocation |
862 | 47eed3f4 | Iustin Pop | -> Result (Node.List, Instance.List, [OpCodes.OpCode]) |
863 | 47eed3f4 | Iustin Pop | nodeEvacInstance _ _ mode (Instance.Instance |
864 | a86fbf36 | Iustin Pop | {Instance.diskTemplate = dt@DTDiskless}) _ _ = |
865 | 47eed3f4 | Iustin Pop | failOnSecondaryChange mode dt >> |
866 | 47eed3f4 | Iustin Pop | fail "Diskless relocations not implemented yet" |
867 | 47eed3f4 | Iustin Pop | |
868 | 47eed3f4 | Iustin Pop | nodeEvacInstance _ _ _ (Instance.Instance |
869 | a86fbf36 | Iustin Pop | {Instance.diskTemplate = DTPlain}) _ _ = |
870 | 47eed3f4 | Iustin Pop | fail "Instances of type plain cannot be relocated" |
871 | 47eed3f4 | Iustin Pop | |
872 | 47eed3f4 | Iustin Pop | nodeEvacInstance _ _ _ (Instance.Instance |
873 | a86fbf36 | Iustin Pop | {Instance.diskTemplate = DTFile}) _ _ = |
874 | 47eed3f4 | Iustin Pop | fail "Instances of type file cannot be relocated" |
875 | 47eed3f4 | Iustin Pop | |
876 | 47eed3f4 | Iustin Pop | nodeEvacInstance _ _ mode (Instance.Instance |
877 | a86fbf36 | Iustin Pop | {Instance.diskTemplate = dt@DTSharedFile}) _ _ = |
878 | 47eed3f4 | Iustin Pop | failOnSecondaryChange mode dt >> |
879 | 47eed3f4 | Iustin Pop | fail "Shared file relocations not implemented yet" |
880 | 47eed3f4 | Iustin Pop | |
881 | 47eed3f4 | Iustin Pop | nodeEvacInstance _ _ mode (Instance.Instance |
882 | a86fbf36 | Iustin Pop | {Instance.diskTemplate = dt@DTBlock}) _ _ = |
883 | 47eed3f4 | Iustin Pop | failOnSecondaryChange mode dt >> |
884 | 47eed3f4 | Iustin Pop | fail "Block device relocations not implemented yet" |
885 | 47eed3f4 | Iustin Pop | |
886 | bef83fd1 | Iustin Pop | nodeEvacInstance nl il ChangePrimary |
887 | a86fbf36 | Iustin Pop | inst@(Instance.Instance {Instance.diskTemplate = DTDrbd8}) |
888 | a86fbf36 | Iustin Pop | _ _ = |
889 | bef83fd1 | Iustin Pop | do |
890 | bef83fd1 | Iustin Pop | (nl', inst', _, _) <- opToResult $ applyMove nl inst Failover |
891 | bef83fd1 | Iustin Pop | let idx = Instance.idx inst |
892 | bef83fd1 | Iustin Pop | il' = Container.add idx inst' il |
893 | bef83fd1 | Iustin Pop | ops = iMoveToJob nl' il' idx Failover |
894 | bef83fd1 | Iustin Pop | return (nl', il', ops) |
895 | bef83fd1 | Iustin Pop | |
896 | db56cfc4 | Iustin Pop | nodeEvacInstance nl il ChangeSecondary |
897 | db56cfc4 | Iustin Pop | inst@(Instance.Instance {Instance.diskTemplate = DTDrbd8}) |
898 | a86fbf36 | Iustin Pop | gdx avail_nodes = |
899 | db56cfc4 | Iustin Pop | do |
900 | db56cfc4 | Iustin Pop | (nl', inst', _, ndx) <- annotateResult "Can't find any good node" $ |
901 | db56cfc4 | Iustin Pop | eitherToResult $ |
902 | db56cfc4 | Iustin Pop | foldl' (evacDrbdSecondaryInner nl inst gdx) |
903 | db56cfc4 | Iustin Pop | (Left "no nodes available") avail_nodes |
904 | db56cfc4 | Iustin Pop | let idx = Instance.idx inst |
905 | db56cfc4 | Iustin Pop | il' = Container.add idx inst' il |
906 | db56cfc4 | Iustin Pop | ops = iMoveToJob nl' il' idx (ReplaceSecondary ndx) |
907 | db56cfc4 | Iustin Pop | return (nl', il', ops) |
908 | db56cfc4 | Iustin Pop | |
909 | 97da6b71 | Iustin Pop | -- The algorithm for ChangeAll is as follows: |
910 | 97da6b71 | Iustin Pop | -- |
911 | 97da6b71 | Iustin Pop | -- * generate all (primary, secondary) node pairs for the target groups |
912 | 97da6b71 | Iustin Pop | -- * for each pair, execute the needed moves (r:s, f, r:s) and compute |
913 | 97da6b71 | Iustin Pop | -- the final node list state and group score |
914 | 97da6b71 | Iustin Pop | -- * select the best choice via a foldl that uses the same Either |
915 | 97da6b71 | Iustin Pop | -- String solution as the ChangeSecondary mode |
916 | d52d41de | Iustin Pop | nodeEvacInstance nl il ChangeAll |
917 | d52d41de | Iustin Pop | inst@(Instance.Instance {Instance.diskTemplate = DTDrbd8}) |
918 | a86fbf36 | Iustin Pop | gdx avail_nodes = |
919 | d52d41de | Iustin Pop | do |
920 | 97da6b71 | Iustin Pop | let no_nodes = Left "no nodes available" |
921 | 97da6b71 | Iustin Pop | node_pairs = [(p,s) | p <- avail_nodes, s <- avail_nodes, p /= s] |
922 | 97da6b71 | Iustin Pop | (nl', il', ops, _) <- |
923 | 97da6b71 | Iustin Pop | annotateResult "Can't find any good nodes for relocation" $ |
924 | d52d41de | Iustin Pop | eitherToResult $ |
925 | 97da6b71 | Iustin Pop | foldl' |
926 | 97da6b71 | Iustin Pop | (\accu nodes -> case evacDrbdAllInner nl il inst gdx nodes of |
927 | 97da6b71 | Iustin Pop | Bad msg -> |
928 | 97da6b71 | Iustin Pop | case accu of |
929 | 97da6b71 | Iustin Pop | Right _ -> accu |
930 | 97da6b71 | Iustin Pop | -- we don't need more details (which |
931 | 97da6b71 | Iustin Pop | -- nodes, etc.) as we only selected |
932 | 97da6b71 | Iustin Pop | -- this group if we can allocate on |
933 | 97da6b71 | Iustin Pop | -- it, hence failures will not |
934 | 97da6b71 | Iustin Pop | -- propagate out of this fold loop |
935 | 97da6b71 | Iustin Pop | Left _ -> Left $ "Allocation failed: " ++ msg |
936 | 97da6b71 | Iustin Pop | Ok result@(_, _, _, new_cv) -> |
937 | 97da6b71 | Iustin Pop | let new_accu = Right result in |
938 | 97da6b71 | Iustin Pop | case accu of |
939 | 97da6b71 | Iustin Pop | Left _ -> new_accu |
940 | 97da6b71 | Iustin Pop | Right (_, _, _, old_cv) -> |
941 | 97da6b71 | Iustin Pop | if old_cv < new_cv |
942 | 97da6b71 | Iustin Pop | then accu |
943 | 97da6b71 | Iustin Pop | else new_accu |
944 | 97da6b71 | Iustin Pop | ) no_nodes node_pairs |
945 | 97da6b71 | Iustin Pop | |
946 | 97da6b71 | Iustin Pop | return (nl', il', ops) |
947 | 47eed3f4 | Iustin Pop | |
948 | db56cfc4 | Iustin Pop | -- | Inner fold function for changing secondary of a DRBD instance. |
949 | db56cfc4 | Iustin Pop | -- |
950 | 97da6b71 | Iustin Pop | -- The running solution is either a @Left String@, which means we |
951 | db56cfc4 | Iustin Pop | -- don't have yet a working solution, or a @Right (...)@, which |
952 | db56cfc4 | Iustin Pop | -- represents a valid solution; it holds the modified node list, the |
953 | db56cfc4 | Iustin Pop | -- modified instance (after evacuation), the score of that solution, |
954 | db56cfc4 | Iustin Pop | -- and the new secondary node index. |
955 | db56cfc4 | Iustin Pop | evacDrbdSecondaryInner :: Node.List -- ^ Cluster node list |
956 | db56cfc4 | Iustin Pop | -> Instance.Instance -- ^ Instance being evacuated |
957 | db56cfc4 | Iustin Pop | -> Gdx -- ^ The group index of the instance |
958 | db56cfc4 | Iustin Pop | -> Either String ( Node.List |
959 | db56cfc4 | Iustin Pop | , Instance.Instance |
960 | db56cfc4 | Iustin Pop | , Score |
961 | db56cfc4 | Iustin Pop | , Ndx) -- ^ Current best solution |
962 | db56cfc4 | Iustin Pop | -> Ndx -- ^ Node we're evaluating as new secondary |
963 | db56cfc4 | Iustin Pop | -> Either String ( Node.List |
964 | db56cfc4 | Iustin Pop | , Instance.Instance |
965 | db56cfc4 | Iustin Pop | , Score |
966 | db56cfc4 | Iustin Pop | , Ndx) -- ^ New best solution |
967 | db56cfc4 | Iustin Pop | evacDrbdSecondaryInner nl inst gdx accu ndx = |
968 | db56cfc4 | Iustin Pop | case applyMove nl inst (ReplaceSecondary ndx) of |
969 | db56cfc4 | Iustin Pop | OpFail fm -> |
970 | db56cfc4 | Iustin Pop | case accu of |
971 | db56cfc4 | Iustin Pop | Right _ -> accu |
972 | db56cfc4 | Iustin Pop | Left _ -> Left $ "Node " ++ Container.nameOf nl ndx ++ |
973 | db56cfc4 | Iustin Pop | " failed: " ++ show fm |
974 | db56cfc4 | Iustin Pop | OpGood (nl', inst', _, _) -> |
975 | db56cfc4 | Iustin Pop | let nodes = Container.elems nl' |
976 | db56cfc4 | Iustin Pop | -- The fromJust below is ugly (it can fail nastily), but |
977 | db56cfc4 | Iustin Pop | -- at this point we should have any internal mismatches, |
978 | db56cfc4 | Iustin Pop | -- and adding a monad here would be quite involved |
979 | 1b0a6356 | Iustin Pop | grpnodes = fromJust (gdx `lookup` Node.computeGroups nodes) |
980 | db56cfc4 | Iustin Pop | new_cv = compCVNodes grpnodes |
981 | db56cfc4 | Iustin Pop | new_accu = Right (nl', inst', new_cv, ndx) |
982 | db56cfc4 | Iustin Pop | in case accu of |
983 | db56cfc4 | Iustin Pop | Left _ -> new_accu |
984 | db56cfc4 | Iustin Pop | Right (_, _, old_cv, _) -> |
985 | db56cfc4 | Iustin Pop | if old_cv < new_cv |
986 | db56cfc4 | Iustin Pop | then accu |
987 | db56cfc4 | Iustin Pop | else new_accu |
988 | db56cfc4 | Iustin Pop | |
989 | 97da6b71 | Iustin Pop | -- | Compute result of changing all nodes of a DRBD instance. |
990 | 97da6b71 | Iustin Pop | -- |
991 | 97da6b71 | Iustin Pop | -- Given the target primary and secondary node (which might be in a |
992 | 97da6b71 | Iustin Pop | -- different group or not), this function will 'execute' all the |
993 | 97da6b71 | Iustin Pop | -- required steps and assuming all operations succceed, will return |
994 | 97da6b71 | Iustin Pop | -- the modified node and instance lists, the opcodes needed for this |
995 | 97da6b71 | Iustin Pop | -- and the new group score. |
996 | 97da6b71 | Iustin Pop | evacDrbdAllInner :: Node.List -- ^ Cluster node list |
997 | 97da6b71 | Iustin Pop | -> Instance.List -- ^ Cluster instance list |
998 | 97da6b71 | Iustin Pop | -> Instance.Instance -- ^ The instance to be moved |
999 | 97da6b71 | Iustin Pop | -> Gdx -- ^ The target group index |
1000 | 97da6b71 | Iustin Pop | -- (which can differ from the |
1001 | 97da6b71 | Iustin Pop | -- current group of the |
1002 | 97da6b71 | Iustin Pop | -- instance) |
1003 | 97da6b71 | Iustin Pop | -> (Ndx, Ndx) -- ^ Tuple of new |
1004 | 97da6b71 | Iustin Pop | -- primary\/secondary nodes |
1005 | 97da6b71 | Iustin Pop | -> Result (Node.List, Instance.List, [OpCodes.OpCode], Score) |
1006 | 97da6b71 | Iustin Pop | evacDrbdAllInner nl il inst gdx (t_pdx, t_sdx) = |
1007 | 97da6b71 | Iustin Pop | do |
1008 | 97da6b71 | Iustin Pop | let primary = Container.find (Instance.pNode inst) nl |
1009 | 97da6b71 | Iustin Pop | idx = Instance.idx inst |
1010 | 97da6b71 | Iustin Pop | -- if the primary is offline, then we first failover |
1011 | 97da6b71 | Iustin Pop | (nl1, inst1, ops1) <- |
1012 | 97da6b71 | Iustin Pop | if Node.offline primary |
1013 | 97da6b71 | Iustin Pop | then do |
1014 | 97da6b71 | Iustin Pop | (nl', inst', _, _) <- |
1015 | 97da6b71 | Iustin Pop | annotateResult "Failing over to the secondary" $ |
1016 | 97da6b71 | Iustin Pop | opToResult $ applyMove nl inst Failover |
1017 | 97da6b71 | Iustin Pop | return (nl', inst', [Failover]) |
1018 | 97da6b71 | Iustin Pop | else return (nl, inst, []) |
1019 | 97da6b71 | Iustin Pop | let (o1, o2, o3) = (ReplaceSecondary t_pdx, |
1020 | 97da6b71 | Iustin Pop | Failover, |
1021 | 97da6b71 | Iustin Pop | ReplaceSecondary t_sdx) |
1022 | 97da6b71 | Iustin Pop | -- we now need to execute a replace secondary to the future |
1023 | 97da6b71 | Iustin Pop | -- primary node |
1024 | 97da6b71 | Iustin Pop | (nl2, inst2, _, _) <- |
1025 | 97da6b71 | Iustin Pop | annotateResult "Changing secondary to new primary" $ |
1026 | 97da6b71 | Iustin Pop | opToResult $ |
1027 | 97da6b71 | Iustin Pop | applyMove nl1 inst1 o1 |
1028 | 97da6b71 | Iustin Pop | let ops2 = o1:ops1 |
1029 | 97da6b71 | Iustin Pop | -- we now execute another failover, the primary stays fixed now |
1030 | 97da6b71 | Iustin Pop | (nl3, inst3, _, _) <- annotateResult "Failing over to new primary" $ |
1031 | 97da6b71 | Iustin Pop | opToResult $ applyMove nl2 inst2 o2 |
1032 | 97da6b71 | Iustin Pop | let ops3 = o2:ops2 |
1033 | 97da6b71 | Iustin Pop | -- and finally another replace secondary, to the final secondary |
1034 | 97da6b71 | Iustin Pop | (nl4, inst4, _, _) <- |
1035 | 97da6b71 | Iustin Pop | annotateResult "Changing secondary to final secondary" $ |
1036 | 97da6b71 | Iustin Pop | opToResult $ |
1037 | 97da6b71 | Iustin Pop | applyMove nl3 inst3 o3 |
1038 | 97da6b71 | Iustin Pop | let ops4 = o3:ops3 |
1039 | 97da6b71 | Iustin Pop | il' = Container.add idx inst4 il |
1040 | 97da6b71 | Iustin Pop | ops = concatMap (iMoveToJob nl4 il' idx) $ reverse ops4 |
1041 | 97da6b71 | Iustin Pop | let nodes = Container.elems nl4 |
1042 | 97da6b71 | Iustin Pop | -- The fromJust below is ugly (it can fail nastily), but |
1043 | 97da6b71 | Iustin Pop | -- at this point we should have any internal mismatches, |
1044 | 97da6b71 | Iustin Pop | -- and adding a monad here would be quite involved |
1045 | 97da6b71 | Iustin Pop | grpnodes = fromJust (gdx `lookup` Node.computeGroups nodes) |
1046 | 97da6b71 | Iustin Pop | new_cv = compCVNodes grpnodes |
1047 | 97da6b71 | Iustin Pop | return (nl4, il', ops, new_cv) |
1048 | 97da6b71 | Iustin Pop | |
1049 | c9a9b853 | Iustin Pop | -- | Computes the nodes in a given group which are available for |
1050 | c9a9b853 | Iustin Pop | -- allocation. |
1051 | c9a9b853 | Iustin Pop | availableGroupNodes :: [(Gdx, [Ndx])] -- ^ Group index/node index assoc list |
1052 | c9a9b853 | Iustin Pop | -> IntSet.IntSet -- ^ Nodes that are excluded |
1053 | c9a9b853 | Iustin Pop | -> Gdx -- ^ The group for which we |
1054 | c9a9b853 | Iustin Pop | -- query the nodes |
1055 | c9a9b853 | Iustin Pop | -> Result [Ndx] -- ^ List of available node indices |
1056 | c9a9b853 | Iustin Pop | availableGroupNodes group_nodes excl_ndx gdx = do |
1057 | 47eed3f4 | Iustin Pop | local_nodes <- maybe (Bad $ "Can't find group with index " ++ show gdx) |
1058 | 47eed3f4 | Iustin Pop | Ok (lookup gdx group_nodes) |
1059 | 47eed3f4 | Iustin Pop | let avail_nodes = filter (not . flip IntSet.member excl_ndx) local_nodes |
1060 | 47eed3f4 | Iustin Pop | return avail_nodes |
1061 | 47eed3f4 | Iustin Pop | |
1062 | 47eed3f4 | Iustin Pop | -- | Updates the evac solution with the results of an instance |
1063 | 47eed3f4 | Iustin Pop | -- evacuation. |
1064 | 47eed3f4 | Iustin Pop | updateEvacSolution :: (Node.List, Instance.List, EvacSolution) |
1065 | 5440c877 | Iustin Pop | -> Idx |
1066 | 47eed3f4 | Iustin Pop | -> Result (Node.List, Instance.List, [OpCodes.OpCode]) |
1067 | 47eed3f4 | Iustin Pop | -> (Node.List, Instance.List, EvacSolution) |
1068 | 5440c877 | Iustin Pop | updateEvacSolution (nl, il, es) idx (Bad msg) = |
1069 | 5440c877 | Iustin Pop | (nl, il, es { esFailed = (idx, msg):esFailed es}) |
1070 | 5440c877 | Iustin Pop | updateEvacSolution (_, _, es) idx (Ok (nl, il, opcodes)) = |
1071 | 5440c877 | Iustin Pop | (nl, il, es { esMoved = new_elem:esMoved es |
1072 | 1ab94e48 | Michael Hanselmann | , esOpCodes = opcodes:esOpCodes es }) |
1073 | 5440c877 | Iustin Pop | where inst = Container.find idx il |
1074 | 5440c877 | Iustin Pop | new_elem = (idx, |
1075 | 5440c877 | Iustin Pop | instancePriGroup nl inst, |
1076 | 5440c877 | Iustin Pop | Instance.allNodes inst) |
1077 | 47eed3f4 | Iustin Pop | |
1078 | 47eed3f4 | Iustin Pop | -- | Node-evacuation IAllocator mode main function. |
1079 | 47eed3f4 | Iustin Pop | tryNodeEvac :: Group.List -- ^ The cluster groups |
1080 | 47eed3f4 | Iustin Pop | -> Node.List -- ^ The node list (cluster-wide, not per group) |
1081 | 47eed3f4 | Iustin Pop | -> Instance.List -- ^ Instance list (cluster-wide) |
1082 | 47eed3f4 | Iustin Pop | -> EvacMode -- ^ The evacuation mode |
1083 | 47eed3f4 | Iustin Pop | -> [Idx] -- ^ List of instance (indices) to be evacuated |
1084 | 4036f63a | Iustin Pop | -> Result (Node.List, Instance.List, EvacSolution) |
1085 | 47eed3f4 | Iustin Pop | tryNodeEvac _ ini_nl ini_il mode idxs = |
1086 | 47eed3f4 | Iustin Pop | let evac_ndx = nodesToEvacuate ini_il mode idxs |
1087 | 47eed3f4 | Iustin Pop | offline = map Node.idx . filter Node.offline $ Container.elems ini_nl |
1088 | 47eed3f4 | Iustin Pop | excl_ndx = foldl' (flip IntSet.insert) evac_ndx offline |
1089 | 47eed3f4 | Iustin Pop | group_ndx = map (\(gdx, (nl, _)) -> (gdx, map Node.idx |
1090 | 47eed3f4 | Iustin Pop | (Container.elems nl))) $ |
1091 | 47eed3f4 | Iustin Pop | splitCluster ini_nl ini_il |
1092 | 4036f63a | Iustin Pop | (fin_nl, fin_il, esol) = |
1093 | 47eed3f4 | Iustin Pop | foldl' (\state@(nl, il, _) inst -> |
1094 | 7073b3a8 | Iustin Pop | let gdx = instancePriGroup nl inst |
1095 | 7073b3a8 | Iustin Pop | pdx = Instance.pNode inst in |
1096 | 5440c877 | Iustin Pop | updateEvacSolution state (Instance.idx inst) $ |
1097 | c9a9b853 | Iustin Pop | availableGroupNodes group_ndx |
1098 | 7073b3a8 | Iustin Pop | (IntSet.insert pdx excl_ndx) gdx >>= |
1099 | a86fbf36 | Iustin Pop | nodeEvacInstance nl il mode inst gdx |
1100 | 47eed3f4 | Iustin Pop | ) |
1101 | 47eed3f4 | Iustin Pop | (ini_nl, ini_il, emptyEvacSolution) |
1102 | 47eed3f4 | Iustin Pop | (map (`Container.find` ini_il) idxs) |
1103 | 4036f63a | Iustin Pop | in return (fin_nl, fin_il, reverseEvacSolution esol) |
1104 | 47eed3f4 | Iustin Pop | |
1105 | 20b376ff | Iustin Pop | -- | Change-group IAllocator mode main function. |
1106 | 20b376ff | Iustin Pop | -- |
1107 | 20b376ff | Iustin Pop | -- This is very similar to 'tryNodeEvac', the only difference is that |
1108 | 20b376ff | Iustin Pop | -- we don't choose as target group the current instance group, but |
1109 | 20b376ff | Iustin Pop | -- instead: |
1110 | 20b376ff | Iustin Pop | -- |
1111 | 20b376ff | Iustin Pop | -- 1. at the start of the function, we compute which are the target |
1112 | 20b376ff | Iustin Pop | -- groups; either no groups were passed in, in which case we choose |
1113 | 20b376ff | Iustin Pop | -- all groups out of which we don't evacuate instance, or there were |
1114 | 20b376ff | Iustin Pop | -- some groups passed, in which case we use those |
1115 | 20b376ff | Iustin Pop | -- |
1116 | 20b376ff | Iustin Pop | -- 2. for each instance, we use 'findBestAllocGroup' to choose the |
1117 | 20b376ff | Iustin Pop | -- best group to hold the instance, and then we do what |
1118 | 20b376ff | Iustin Pop | -- 'tryNodeEvac' does, except for this group instead of the current |
1119 | 20b376ff | Iustin Pop | -- instance group. |
1120 | 20b376ff | Iustin Pop | -- |
1121 | 20b376ff | Iustin Pop | -- Note that the correct behaviour of this function relies on the |
1122 | 20b376ff | Iustin Pop | -- function 'nodeEvacInstance' to be able to do correctly both |
1123 | 20b376ff | Iustin Pop | -- intra-group and inter-group moves when passed the 'ChangeAll' mode. |
1124 | 20b376ff | Iustin Pop | tryChangeGroup :: Group.List -- ^ The cluster groups |
1125 | 20b376ff | Iustin Pop | -> Node.List -- ^ The node list (cluster-wide) |
1126 | 20b376ff | Iustin Pop | -> Instance.List -- ^ Instance list (cluster-wide) |
1127 | 20b376ff | Iustin Pop | -> [Gdx] -- ^ Target groups; if empty, any |
1128 | 20b376ff | Iustin Pop | -- groups not being evacuated |
1129 | 20b376ff | Iustin Pop | -> [Idx] -- ^ List of instance (indices) to be evacuated |
1130 | 4036f63a | Iustin Pop | -> Result (Node.List, Instance.List, EvacSolution) |
1131 | 20b376ff | Iustin Pop | tryChangeGroup gl ini_nl ini_il gdxs idxs = |
1132 | 20b376ff | Iustin Pop | let evac_gdxs = nub $ map (instancePriGroup ini_nl . |
1133 | 20b376ff | Iustin Pop | flip Container.find ini_il) idxs |
1134 | 20b376ff | Iustin Pop | target_gdxs = (if null gdxs |
1135 | 20b376ff | Iustin Pop | then Container.keys gl |
1136 | 20b376ff | Iustin Pop | else gdxs) \\ evac_gdxs |
1137 | 20b376ff | Iustin Pop | offline = map Node.idx . filter Node.offline $ Container.elems ini_nl |
1138 | 20b376ff | Iustin Pop | excl_ndx = foldl' (flip IntSet.insert) IntSet.empty offline |
1139 | 20b376ff | Iustin Pop | group_ndx = map (\(gdx, (nl, _)) -> (gdx, map Node.idx |
1140 | 20b376ff | Iustin Pop | (Container.elems nl))) $ |
1141 | 20b376ff | Iustin Pop | splitCluster ini_nl ini_il |
1142 | 4036f63a | Iustin Pop | (fin_nl, fin_il, esol) = |
1143 | 20b376ff | Iustin Pop | foldl' (\state@(nl, il, _) inst -> |
1144 | 20b376ff | Iustin Pop | let solution = do |
1145 | 20b376ff | Iustin Pop | let ncnt = Instance.requiredNodes $ |
1146 | 20b376ff | Iustin Pop | Instance.diskTemplate inst |
1147 | 20b376ff | Iustin Pop | (gdx, _, _) <- findBestAllocGroup gl nl il |
1148 | 20b376ff | Iustin Pop | (Just target_gdxs) inst ncnt |
1149 | 20b376ff | Iustin Pop | av_nodes <- availableGroupNodes group_ndx |
1150 | 20b376ff | Iustin Pop | excl_ndx gdx |
1151 | a86fbf36 | Iustin Pop | nodeEvacInstance nl il ChangeAll inst |
1152 | a86fbf36 | Iustin Pop | gdx av_nodes |
1153 | 5440c877 | Iustin Pop | in updateEvacSolution state |
1154 | 5440c877 | Iustin Pop | (Instance.idx inst) solution |
1155 | 20b376ff | Iustin Pop | ) |
1156 | 20b376ff | Iustin Pop | (ini_nl, ini_il, emptyEvacSolution) |
1157 | 20b376ff | Iustin Pop | (map (`Container.find` ini_il) idxs) |
1158 | 4036f63a | Iustin Pop | in return (fin_nl, fin_il, reverseEvacSolution esol) |
1159 | 20b376ff | Iustin Pop | |
1160 | 7eda951b | Iustin Pop | -- | Standard-sized allocation method. |
1161 | 7eda951b | Iustin Pop | -- |
1162 | 7eda951b | Iustin Pop | -- This places instances of the same size on the cluster until we're |
1163 | 7eda951b | Iustin Pop | -- out of space. The result will be a list of identically-sized |
1164 | 7eda951b | Iustin Pop | -- instances. |
1165 | 7eda951b | Iustin Pop | iterateAlloc :: AllocMethod |
1166 | 8f48f67d | Iustin Pop | iterateAlloc nl il limit newinst allocnodes ixes cstats = |
1167 | 3ce8009a | Iustin Pop | let depth = length ixes |
1168 | 3ce8009a | Iustin Pop | newname = printf "new-%d" depth::String |
1169 | 3ce8009a | Iustin Pop | newidx = length (Container.elems il) + depth |
1170 | 3ce8009a | Iustin Pop | newi2 = Instance.setIdx (Instance.setName newinst newname) newidx |
1171 | 8f48f67d | Iustin Pop | newlimit = fmap (flip (-) 1) limit |
1172 | 41b5c85a | Iustin Pop | in case tryAlloc nl il newi2 allocnodes of |
1173 | 3ce8009a | Iustin Pop | Bad s -> Bad s |
1174 | 129734d3 | Iustin Pop | Ok (AllocSolution { asFailures = errs, asSolution = sols3 }) -> |
1175 | 8f48f67d | Iustin Pop | let newsol = Ok (collapseFailures errs, nl, il, ixes, cstats) in |
1176 | 3ce8009a | Iustin Pop | case sols3 of |
1177 | 129734d3 | Iustin Pop | Nothing -> newsol |
1178 | 129734d3 | Iustin Pop | Just (xnl, xi, _, _) -> |
1179 | 8f48f67d | Iustin Pop | if limit == Just 0 |
1180 | 8f48f67d | Iustin Pop | then newsol |
1181 | 8f48f67d | Iustin Pop | else iterateAlloc xnl (Container.add newidx xi il) |
1182 | 8f48f67d | Iustin Pop | newlimit newinst allocnodes (xi:ixes) |
1183 | 8f48f67d | Iustin Pop | (totalResources xnl:cstats) |
1184 | 3ce8009a | Iustin Pop | |
1185 | 7eda951b | Iustin Pop | -- | Tiered allocation method. |
1186 | 7eda951b | Iustin Pop | -- |
1187 | 7eda951b | Iustin Pop | -- This places instances on the cluster, and decreases the spec until |
1188 | 7eda951b | Iustin Pop | -- we can allocate again. The result will be a list of decreasing |
1189 | 7eda951b | Iustin Pop | -- instance specs. |
1190 | 7eda951b | Iustin Pop | tieredAlloc :: AllocMethod |
1191 | 8f48f67d | Iustin Pop | tieredAlloc nl il limit newinst allocnodes ixes cstats = |
1192 | 8f48f67d | Iustin Pop | case iterateAlloc nl il limit newinst allocnodes ixes cstats of |
1193 | 3ce8009a | Iustin Pop | Bad s -> Bad s |
1194 | d5ccec02 | Iustin Pop | Ok (errs, nl', il', ixes', cstats') -> |
1195 | 8f48f67d | Iustin Pop | let newsol = Ok (errs, nl', il', ixes', cstats') |
1196 | 8f48f67d | Iustin Pop | ixes_cnt = length ixes' |
1197 | 8f48f67d | Iustin Pop | (stop, newlimit) = case limit of |
1198 | 8f48f67d | Iustin Pop | Nothing -> (False, Nothing) |
1199 | 8f48f67d | Iustin Pop | Just n -> (n <= ixes_cnt, |
1200 | 8f48f67d | Iustin Pop | Just (n - ixes_cnt)) in |
1201 | 8f48f67d | Iustin Pop | if stop then newsol else |
1202 | 3ce8009a | Iustin Pop | case Instance.shrinkByType newinst . fst . last $ |
1203 | 3ce8009a | Iustin Pop | sortBy (comparing snd) errs of |
1204 | 8f48f67d | Iustin Pop | Bad _ -> newsol |
1205 | 8f48f67d | Iustin Pop | Ok newinst' -> tieredAlloc nl' il' newlimit |
1206 | 8f48f67d | Iustin Pop | newinst' allocnodes ixes' cstats' |
1207 | 3ce8009a | Iustin Pop | |
1208 | 9188aeef | Iustin Pop | -- * Formatting functions |
1209 | e4f08c46 | Iustin Pop | |
1210 | e4f08c46 | Iustin Pop | -- | Given the original and final nodes, computes the relocation description. |
1211 | c9926b22 | Iustin Pop | computeMoves :: Instance.Instance -- ^ The instance to be moved |
1212 | c9926b22 | Iustin Pop | -> String -- ^ The instance name |
1213 | 668c03b3 | Iustin Pop | -> IMove -- ^ The move being performed |
1214 | e4f08c46 | Iustin Pop | -> String -- ^ New primary |
1215 | e4f08c46 | Iustin Pop | -> String -- ^ New secondary |
1216 | e4f08c46 | Iustin Pop | -> (String, [String]) |
1217 | e4f08c46 | Iustin Pop | -- ^ Tuple of moves and commands list; moves is containing |
1218 | e4f08c46 | Iustin Pop | -- either @/f/@ for failover or @/r:name/@ for replace |
1219 | e4f08c46 | Iustin Pop | -- secondary, while the command list holds gnt-instance |
1220 | e4f08c46 | Iustin Pop | -- commands (without that prefix), e.g \"@failover instance1@\" |
1221 | 668c03b3 | Iustin Pop | computeMoves i inam mv c d = |
1222 | 668c03b3 | Iustin Pop | case mv of |
1223 | 668c03b3 | Iustin Pop | Failover -> ("f", [mig]) |
1224 | 668c03b3 | Iustin Pop | FailoverAndReplace _ -> (printf "f r:%s" d, [mig, rep d]) |
1225 | 668c03b3 | Iustin Pop | ReplaceSecondary _ -> (printf "r:%s" d, [rep d]) |
1226 | 668c03b3 | Iustin Pop | ReplaceAndFailover _ -> (printf "r:%s f" c, [rep c, mig]) |
1227 | 668c03b3 | Iustin Pop | ReplacePrimary _ -> (printf "f r:%s f" c, [mig, rep c, mig]) |
1228 | c9926b22 | Iustin Pop | where morf = if Instance.running i then "migrate" else "failover" |
1229 | c9926b22 | Iustin Pop | mig = printf "%s -f %s" morf inam::String |
1230 | c9926b22 | Iustin Pop | rep n = printf "replace-disks -n %s %s" n inam |
1231 | e4f08c46 | Iustin Pop | |
1232 | 9188aeef | Iustin Pop | -- | Converts a placement to string format. |
1233 | 9188aeef | Iustin Pop | printSolutionLine :: Node.List -- ^ The node list |
1234 | 9188aeef | Iustin Pop | -> Instance.List -- ^ The instance list |
1235 | 9188aeef | Iustin Pop | -> Int -- ^ Maximum node name length |
1236 | 9188aeef | Iustin Pop | -> Int -- ^ Maximum instance name length |
1237 | 9188aeef | Iustin Pop | -> Placement -- ^ The current placement |
1238 | 9188aeef | Iustin Pop | -> Int -- ^ The index of the placement in |
1239 | 9188aeef | Iustin Pop | -- the solution |
1240 | db1bcfe8 | Iustin Pop | -> (String, [String]) |
1241 | db1bcfe8 | Iustin Pop | printSolutionLine nl il nmlen imlen plc pos = |
1242 | ca8258d9 | Iustin Pop | let |
1243 | ca8258d9 | Iustin Pop | pmlen = (2*nmlen + 1) |
1244 | 668c03b3 | Iustin Pop | (i, p, s, mv, c) = plc |
1245 | ca8258d9 | Iustin Pop | inst = Container.find i il |
1246 | 14c972c7 | Iustin Pop | inam = Instance.alias inst |
1247 | 14c972c7 | Iustin Pop | npri = Node.alias $ Container.find p nl |
1248 | 14c972c7 | Iustin Pop | nsec = Node.alias $ Container.find s nl |
1249 | 14c972c7 | Iustin Pop | opri = Node.alias $ Container.find (Instance.pNode inst) nl |
1250 | 14c972c7 | Iustin Pop | osec = Node.alias $ Container.find (Instance.sNode inst) nl |
1251 | 668c03b3 | Iustin Pop | (moves, cmds) = computeMoves inst inam mv npri nsec |
1252 | 9f6dcdea | Iustin Pop | ostr = printf "%s:%s" opri osec::String |
1253 | 9f6dcdea | Iustin Pop | nstr = printf "%s:%s" npri nsec::String |
1254 | ca8258d9 | Iustin Pop | in |
1255 | ab271fc1 | Iustin Pop | (printf " %3d. %-*s %-*s => %-*s %.8f a=%s" |
1256 | ab271fc1 | Iustin Pop | pos imlen inam pmlen ostr |
1257 | ca8258d9 | Iustin Pop | pmlen nstr c moves, |
1258 | ca8258d9 | Iustin Pop | cmds) |
1259 | ca8258d9 | Iustin Pop | |
1260 | 0e8ae201 | Iustin Pop | -- | Return the instance and involved nodes in an instance move. |
1261 | 77ecfa82 | Iustin Pop | -- |
1262 | 77ecfa82 | Iustin Pop | -- Note that the output list length can vary, and is not required nor |
1263 | 77ecfa82 | Iustin Pop | -- guaranteed to be of any specific length. |
1264 | 77ecfa82 | Iustin Pop | involvedNodes :: Instance.List -- ^ Instance list, used for retrieving |
1265 | 77ecfa82 | Iustin Pop | -- the instance from its index; note |
1266 | 77ecfa82 | Iustin Pop | -- that this /must/ be the original |
1267 | 77ecfa82 | Iustin Pop | -- instance list, so that we can |
1268 | 77ecfa82 | Iustin Pop | -- retrieve the old nodes |
1269 | 77ecfa82 | Iustin Pop | -> Placement -- ^ The placement we're investigating, |
1270 | 77ecfa82 | Iustin Pop | -- containing the new nodes and |
1271 | 77ecfa82 | Iustin Pop | -- instance index |
1272 | 77ecfa82 | Iustin Pop | -> [Ndx] -- ^ Resulting list of node indices |
1273 | 0e8ae201 | Iustin Pop | involvedNodes il plc = |
1274 | 3173c987 | Iustin Pop | let (i, np, ns, _, _) = plc |
1275 | 0e8ae201 | Iustin Pop | inst = Container.find i il |
1276 | 77ecfa82 | Iustin Pop | in nub $ [np, ns] ++ Instance.allNodes inst |
1277 | 0e8ae201 | Iustin Pop | |
1278 | 0e8ae201 | Iustin Pop | -- | Inner function for splitJobs, that either appends the next job to |
1279 | 0e8ae201 | Iustin Pop | -- the current jobset, or starts a new jobset. |
1280 | 0e8ae201 | Iustin Pop | mergeJobs :: ([JobSet], [Ndx]) -> MoveJob -> ([JobSet], [Ndx]) |
1281 | 924f9c16 | Iustin Pop | mergeJobs ([], _) n@(ndx, _, _, _) = ([[n]], ndx) |
1282 | 924f9c16 | Iustin Pop | mergeJobs (cjs@(j:js), nbuf) n@(ndx, _, _, _) |
1283 | 0e8ae201 | Iustin Pop | | null (ndx `intersect` nbuf) = ((n:j):js, ndx ++ nbuf) |
1284 | 0e8ae201 | Iustin Pop | | otherwise = ([n]:cjs, ndx) |
1285 | 0e8ae201 | Iustin Pop | |
1286 | 0e8ae201 | Iustin Pop | -- | Break a list of moves into independent groups. Note that this |
1287 | 0e8ae201 | Iustin Pop | -- will reverse the order of jobs. |
1288 | 0e8ae201 | Iustin Pop | splitJobs :: [MoveJob] -> [JobSet] |
1289 | 0e8ae201 | Iustin Pop | splitJobs = fst . foldl mergeJobs ([], []) |
1290 | 0e8ae201 | Iustin Pop | |
1291 | 0e8ae201 | Iustin Pop | -- | Given a list of commands, prefix them with @gnt-instance@ and |
1292 | 0e8ae201 | Iustin Pop | -- also beautify the display a little. |
1293 | 0e8ae201 | Iustin Pop | formatJob :: Int -> Int -> (Int, MoveJob) -> [String] |
1294 | 924f9c16 | Iustin Pop | formatJob jsn jsl (sn, (_, _, _, cmds)) = |
1295 | 0e8ae201 | Iustin Pop | let out = |
1296 | 0e8ae201 | Iustin Pop | printf " echo job %d/%d" jsn sn: |
1297 | 0e8ae201 | Iustin Pop | printf " check": |
1298 | 0e8ae201 | Iustin Pop | map (" gnt-instance " ++) cmds |
1299 | 0e8ae201 | Iustin Pop | in if sn == 1 |
1300 | 0e8ae201 | Iustin Pop | then ["", printf "echo jobset %d, %d jobs" jsn jsl] ++ out |
1301 | 0e8ae201 | Iustin Pop | else out |
1302 | 0e8ae201 | Iustin Pop | |
1303 | 9188aeef | Iustin Pop | -- | Given a list of commands, prefix them with @gnt-instance@ and |
1304 | 9188aeef | Iustin Pop | -- also beautify the display a little. |
1305 | 0e8ae201 | Iustin Pop | formatCmds :: [JobSet] -> String |
1306 | 9f6dcdea | Iustin Pop | formatCmds = |
1307 | 9f6dcdea | Iustin Pop | unlines . |
1308 | 0e8ae201 | Iustin Pop | concatMap (\(jsn, js) -> concatMap (formatJob jsn (length js)) |
1309 | 0e8ae201 | Iustin Pop | (zip [1..] js)) . |
1310 | 9f6dcdea | Iustin Pop | zip [1..] |
1311 | 142538ff | Iustin Pop | |
1312 | e4f08c46 | Iustin Pop | -- | Print the node list. |
1313 | e98fb766 | Iustin Pop | printNodes :: Node.List -> [String] -> String |
1314 | e98fb766 | Iustin Pop | printNodes nl fs = |
1315 | 6dfa04fd | Iustin Pop | let fields = case fs of |
1316 | 6dfa04fd | Iustin Pop | [] -> Node.defaultFields |
1317 | 6dfa04fd | Iustin Pop | "+":rest -> Node.defaultFields ++ rest |
1318 | 6dfa04fd | Iustin Pop | _ -> fs |
1319 | 5182e970 | Iustin Pop | snl = sortBy (comparing Node.idx) (Container.elems nl) |
1320 | e98fb766 | Iustin Pop | (header, isnum) = unzip $ map Node.showHeader fields |
1321 | c5f7412e | Iustin Pop | in unlines . map ((:) ' ' . intercalate " ") $ |
1322 | e98fb766 | Iustin Pop | formatTable (header:map (Node.list fields) snl) isnum |
1323 | e4f08c46 | Iustin Pop | |
1324 | 507fda3f | Iustin Pop | -- | Print the instance list. |
1325 | 507fda3f | Iustin Pop | printInsts :: Node.List -> Instance.List -> String |
1326 | 507fda3f | Iustin Pop | printInsts nl il = |
1327 | 5182e970 | Iustin Pop | let sil = sortBy (comparing Instance.idx) (Container.elems il) |
1328 | 30ff0c73 | Iustin Pop | helper inst = [ if Instance.running inst then "R" else " " |
1329 | 30ff0c73 | Iustin Pop | , Instance.name inst |
1330 | 30ff0c73 | Iustin Pop | , Container.nameOf nl (Instance.pNode inst) |
1331 | 5182e970 | Iustin Pop | , let sdx = Instance.sNode inst |
1332 | 5182e970 | Iustin Pop | in if sdx == Node.noSecondary |
1333 | 5182e970 | Iustin Pop | then "" |
1334 | 5182e970 | Iustin Pop | else Container.nameOf nl sdx |
1335 | 0e09422b | Iustin Pop | , if Instance.autoBalance inst then "Y" else "N" |
1336 | 30ff0c73 | Iustin Pop | , printf "%3d" $ Instance.vcpus inst |
1337 | 30ff0c73 | Iustin Pop | , printf "%5d" $ Instance.mem inst |
1338 | 30ff0c73 | Iustin Pop | , printf "%5d" $ Instance.dsk inst `div` 1024 |
1339 | 30ff0c73 | Iustin Pop | , printf "%5.3f" lC |
1340 | 30ff0c73 | Iustin Pop | , printf "%5.3f" lM |
1341 | 30ff0c73 | Iustin Pop | , printf "%5.3f" lD |
1342 | 30ff0c73 | Iustin Pop | , printf "%5.3f" lN |
1343 | 30ff0c73 | Iustin Pop | ] |
1344 | 30ff0c73 | Iustin Pop | where DynUtil lC lM lD lN = Instance.util inst |
1345 | 93439b1c | Iustin Pop | header = [ "F", "Name", "Pri_node", "Sec_node", "Auto_bal" |
1346 | 93439b1c | Iustin Pop | , "vcpu", "mem" , "dsk", "lCpu", "lMem", "lDsk", "lNet" ] |
1347 | 93439b1c | Iustin Pop | isnum = False:False:False:False:False:repeat True |
1348 | c5f7412e | Iustin Pop | in unlines . map ((:) ' ' . intercalate " ") $ |
1349 | c5f7412e | Iustin Pop | formatTable (header:map helper sil) isnum |
1350 | 507fda3f | Iustin Pop | |
1351 | 9188aeef | Iustin Pop | -- | Shows statistics for a given node list. |
1352 | 262a08a2 | Iustin Pop | printStats :: Node.List -> String |
1353 | e4f08c46 | Iustin Pop | printStats nl = |
1354 | 9bb5721c | Iustin Pop | let dcvs = compDetailedCV $ Container.elems nl |
1355 | 8a3b30ca | Iustin Pop | (weights, names) = unzip detailedCVInfo |
1356 | 8a3b30ca | Iustin Pop | hd = zip3 (weights ++ repeat 1) (names ++ repeat "unknown") dcvs |
1357 | 8a3b30ca | Iustin Pop | formatted = map (\(w, header, val) -> |
1358 | 8a3b30ca | Iustin Pop | printf "%s=%.8f(x%.2f)" header val w::String) hd |
1359 | fca250e9 | Iustin Pop | in intercalate ", " formatted |
1360 | 6b20875c | Iustin Pop | |
1361 | 6b20875c | Iustin Pop | -- | Convert a placement into a list of OpCodes (basically a job). |
1362 | 179c0828 | Iustin Pop | iMoveToJob :: Node.List -- ^ The node list; only used for node |
1363 | 179c0828 | Iustin Pop | -- names, so any version is good |
1364 | 179c0828 | Iustin Pop | -- (before or after the operation) |
1365 | 179c0828 | Iustin Pop | -> Instance.List -- ^ The instance list; also used for |
1366 | 179c0828 | Iustin Pop | -- names only |
1367 | 179c0828 | Iustin Pop | -> Idx -- ^ The index of the instance being |
1368 | 179c0828 | Iustin Pop | -- moved |
1369 | 179c0828 | Iustin Pop | -> IMove -- ^ The actual move to be described |
1370 | 179c0828 | Iustin Pop | -> [OpCodes.OpCode] -- ^ The list of opcodes equivalent to |
1371 | 179c0828 | Iustin Pop | -- the given move |
1372 | 3e4480e0 | Iustin Pop | iMoveToJob nl il idx move = |
1373 | dfbbd43a | Iustin Pop | let inst = Container.find idx il |
1374 | 3e4480e0 | Iustin Pop | iname = Instance.name inst |
1375 | 3e4480e0 | Iustin Pop | lookNode = Just . Container.nameOf nl |
1376 | bbe9758d | Iustin Pop | opF = OpCodes.OpInstanceMigrate iname True False True Nothing |
1377 | 10028866 | René Nussbaumer | opR n = OpCodes.OpInstanceReplaceDisks iname (lookNode n) |
1378 | 6b20875c | Iustin Pop | OpCodes.ReplaceNewSecondary [] Nothing |
1379 | 6b20875c | Iustin Pop | in case move of |
1380 | 6b20875c | Iustin Pop | Failover -> [ opF ] |
1381 | 6b20875c | Iustin Pop | ReplacePrimary np -> [ opF, opR np, opF ] |
1382 | 6b20875c | Iustin Pop | ReplaceSecondary ns -> [ opR ns ] |
1383 | 6b20875c | Iustin Pop | ReplaceAndFailover np -> [ opR np, opF ] |
1384 | 6b20875c | Iustin Pop | FailoverAndReplace ns -> [ opF, opR ns ] |
1385 | 32b8d9c0 | Iustin Pop | |
1386 | 949397c8 | Iustin Pop | -- * Node group functions |
1387 | 949397c8 | Iustin Pop | |
1388 | 525bfb36 | Iustin Pop | -- | Computes the group of an instance. |
1389 | 10ef6b4e | Iustin Pop | instanceGroup :: Node.List -> Instance.Instance -> Result Gdx |
1390 | 32b8d9c0 | Iustin Pop | instanceGroup nl i = |
1391 | 32b8d9c0 | Iustin Pop | let sidx = Instance.sNode i |
1392 | 32b8d9c0 | Iustin Pop | pnode = Container.find (Instance.pNode i) nl |
1393 | 32b8d9c0 | Iustin Pop | snode = if sidx == Node.noSecondary |
1394 | 32b8d9c0 | Iustin Pop | then pnode |
1395 | 32b8d9c0 | Iustin Pop | else Container.find sidx nl |
1396 | 10ef6b4e | Iustin Pop | pgroup = Node.group pnode |
1397 | 10ef6b4e | Iustin Pop | sgroup = Node.group snode |
1398 | 10ef6b4e | Iustin Pop | in if pgroup /= sgroup |
1399 | 10ef6b4e | Iustin Pop | then fail ("Instance placed accross two node groups, primary " ++ |
1400 | 10ef6b4e | Iustin Pop | show pgroup ++ ", secondary " ++ show sgroup) |
1401 | 10ef6b4e | Iustin Pop | else return pgroup |
1402 | 32b8d9c0 | Iustin Pop | |
1403 | 525bfb36 | Iustin Pop | -- | Computes the group of an instance per the primary node. |
1404 | 4bc33d60 | Iustin Pop | instancePriGroup :: Node.List -> Instance.Instance -> Gdx |
1405 | 4bc33d60 | Iustin Pop | instancePriGroup nl i = |
1406 | 4bc33d60 | Iustin Pop | let pnode = Container.find (Instance.pNode i) nl |
1407 | 4bc33d60 | Iustin Pop | in Node.group pnode |
1408 | 4bc33d60 | Iustin Pop | |
1409 | 32b8d9c0 | Iustin Pop | -- | Compute the list of badly allocated instances (split across node |
1410 | 525bfb36 | Iustin Pop | -- groups). |
1411 | 32b8d9c0 | Iustin Pop | findSplitInstances :: Node.List -> Instance.List -> [Instance.Instance] |
1412 | 2a8e2dc9 | Iustin Pop | findSplitInstances nl = |
1413 | 2a8e2dc9 | Iustin Pop | filter (not . isOk . instanceGroup nl) . Container.elems |
1414 | f4161783 | Iustin Pop | |
1415 | 525bfb36 | Iustin Pop | -- | Splits a cluster into the component node groups. |
1416 | f4161783 | Iustin Pop | splitCluster :: Node.List -> Instance.List -> |
1417 | 10ef6b4e | Iustin Pop | [(Gdx, (Node.List, Instance.List))] |
1418 | f4161783 | Iustin Pop | splitCluster nl il = |
1419 | f4161783 | Iustin Pop | let ngroups = Node.computeGroups (Container.elems nl) |
1420 | f4161783 | Iustin Pop | in map (\(guuid, nodes) -> |
1421 | f4161783 | Iustin Pop | let nidxs = map Node.idx nodes |
1422 | f4161783 | Iustin Pop | nodes' = zip nidxs nodes |
1423 | f4161783 | Iustin Pop | instances = Container.filter ((`elem` nidxs) . Instance.pNode) il |
1424 | cb0c77ff | Iustin Pop | in (guuid, (Container.fromList nodes', instances))) ngroups |
1425 | 1f4ae205 | Iustin Pop | |
1426 | 63a78055 | Iustin Pop | -- | Compute the list of nodes that are to be evacuated, given a list |
1427 | 63a78055 | Iustin Pop | -- of instances and an evacuation mode. |
1428 | 63a78055 | Iustin Pop | nodesToEvacuate :: Instance.List -- ^ The cluster-wide instance list |
1429 | 63a78055 | Iustin Pop | -> EvacMode -- ^ The evacuation mode we're using |
1430 | 63a78055 | Iustin Pop | -> [Idx] -- ^ List of instance indices being evacuated |
1431 | 63a78055 | Iustin Pop | -> IntSet.IntSet -- ^ Set of node indices |
1432 | 63a78055 | Iustin Pop | nodesToEvacuate il mode = |
1433 | 63a78055 | Iustin Pop | IntSet.delete Node.noSecondary . |
1434 | 63a78055 | Iustin Pop | foldl' (\ns idx -> |
1435 | 63a78055 | Iustin Pop | let i = Container.find idx il |
1436 | 63a78055 | Iustin Pop | pdx = Instance.pNode i |
1437 | 63a78055 | Iustin Pop | sdx = Instance.sNode i |
1438 | 63a78055 | Iustin Pop | dt = Instance.diskTemplate i |
1439 | 63a78055 | Iustin Pop | withSecondary = case dt of |
1440 | 63a78055 | Iustin Pop | DTDrbd8 -> IntSet.insert sdx ns |
1441 | 63a78055 | Iustin Pop | _ -> ns |
1442 | 63a78055 | Iustin Pop | in case mode of |
1443 | 63a78055 | Iustin Pop | ChangePrimary -> IntSet.insert pdx ns |
1444 | 63a78055 | Iustin Pop | ChangeSecondary -> withSecondary |
1445 | 63a78055 | Iustin Pop | ChangeAll -> IntSet.insert pdx withSecondary |
1446 | 63a78055 | Iustin Pop | ) IntSet.empty |