root / src / Ganeti / HTools / Types.hs @ 3add7574
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1 | e9aaa3c6 | Iustin Pop | {-# LANGUAGE TemplateHaskell #-} |
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2 | e9aaa3c6 | Iustin Pop | |
3 | e4c5beaf | Iustin Pop | {-| Some common types. |
4 | e4c5beaf | Iustin Pop | |
5 | e4c5beaf | Iustin Pop | -} |
6 | e4c5beaf | Iustin Pop | |
7 | e2fa2baf | Iustin Pop | {- |
8 | e2fa2baf | Iustin Pop | |
9 | e8fa4ff6 | Iustin Pop | Copyright (C) 2009, 2010, 2011, 2012 Google Inc. |
10 | e2fa2baf | Iustin Pop | |
11 | e2fa2baf | Iustin Pop | This program is free software; you can redistribute it and/or modify |
12 | e2fa2baf | Iustin Pop | it under the terms of the GNU General Public License as published by |
13 | e2fa2baf | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
14 | e2fa2baf | Iustin Pop | (at your option) any later version. |
15 | e2fa2baf | Iustin Pop | |
16 | e2fa2baf | Iustin Pop | This program is distributed in the hope that it will be useful, but |
17 | e2fa2baf | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | e2fa2baf | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
19 | e2fa2baf | Iustin Pop | General Public License for more details. |
20 | e2fa2baf | Iustin Pop | |
21 | e2fa2baf | Iustin Pop | You should have received a copy of the GNU General Public License |
22 | e2fa2baf | Iustin Pop | along with this program; if not, write to the Free Software |
23 | e2fa2baf | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
24 | e2fa2baf | Iustin Pop | 02110-1301, USA. |
25 | e2fa2baf | Iustin Pop | |
26 | e2fa2baf | Iustin Pop | -} |
27 | e2fa2baf | Iustin Pop | |
28 | e4c5beaf | Iustin Pop | module Ganeti.HTools.Types |
29 | ebf38064 | Iustin Pop | ( Idx |
30 | ebf38064 | Iustin Pop | , Ndx |
31 | ebf38064 | Iustin Pop | , Gdx |
32 | ebf38064 | Iustin Pop | , NameAssoc |
33 | ebf38064 | Iustin Pop | , Score |
34 | ebf38064 | Iustin Pop | , Weight |
35 | ebf38064 | Iustin Pop | , GroupID |
36 | f3f76ccc | Iustin Pop | , defaultGroupID |
37 | ebf38064 | Iustin Pop | , AllocPolicy(..) |
38 | ebf38064 | Iustin Pop | , allocPolicyFromRaw |
39 | ebf38064 | Iustin Pop | , allocPolicyToRaw |
40 | ebf38064 | Iustin Pop | , InstanceStatus(..) |
41 | ebf38064 | Iustin Pop | , instanceStatusFromRaw |
42 | ebf38064 | Iustin Pop | , instanceStatusToRaw |
43 | ebf38064 | Iustin Pop | , RSpec(..) |
44 | 76a20994 | Iustin Pop | , AllocInfo(..) |
45 | 80d7d8a1 | Iustin Pop | , AllocStats |
46 | ebf38064 | Iustin Pop | , DynUtil(..) |
47 | ebf38064 | Iustin Pop | , zeroUtil |
48 | ebf38064 | Iustin Pop | , baseUtil |
49 | ebf38064 | Iustin Pop | , addUtil |
50 | ebf38064 | Iustin Pop | , subUtil |
51 | ebf38064 | Iustin Pop | , defReservedDiskRatio |
52 | ebf38064 | Iustin Pop | , unitMem |
53 | ebf38064 | Iustin Pop | , unitCpu |
54 | ebf38064 | Iustin Pop | , unitDsk |
55 | ebf38064 | Iustin Pop | , unknownField |
56 | ebf38064 | Iustin Pop | , Placement |
57 | ebf38064 | Iustin Pop | , IMove(..) |
58 | ebf38064 | Iustin Pop | , DiskTemplate(..) |
59 | ebf38064 | Iustin Pop | , diskTemplateToRaw |
60 | ebf38064 | Iustin Pop | , diskTemplateFromRaw |
61 | b906d7c1 | Iustin Pop | , MirrorType(..) |
62 | b906d7c1 | Iustin Pop | , templateMirrorType |
63 | ebf38064 | Iustin Pop | , MoveJob |
64 | ebf38064 | Iustin Pop | , JobSet |
65 | ebf38064 | Iustin Pop | , Element(..) |
66 | ebf38064 | Iustin Pop | , FailMode(..) |
67 | ebf38064 | Iustin Pop | , FailStats |
68 | a8038349 | Iustin Pop | , OpResult |
69 | ebf38064 | Iustin Pop | , opToResult |
70 | ebf38064 | Iustin Pop | , EvacMode(..) |
71 | a07343b2 | Iustin Pop | , ISpec(..) |
72 | a07343b2 | Iustin Pop | , IPolicy(..) |
73 | d02f941e | Iustin Pop | , defIPolicy |
74 | 304f9292 | Iustin Pop | , rspecFromISpec |
75 | ebf38064 | Iustin Pop | ) where |
76 | e4c5beaf | Iustin Pop | |
77 | 2d0ca2c5 | Iustin Pop | import qualified Data.Map as M |
78 | 2d0ca2c5 | Iustin Pop | |
79 | 2e5eb96a | Iustin Pop | import qualified Ganeti.Constants as C |
80 | e9aaa3c6 | Iustin Pop | import qualified Ganeti.THH as THH |
81 | 0c37d1e4 | Iustin Pop | import Ganeti.BasicTypes |
82 | 5e9deac0 | Iustin Pop | import Ganeti.Types |
83 | 2e5eb96a | Iustin Pop | |
84 | 9188aeef | Iustin Pop | -- | The instance index type. |
85 | 608efcce | Iustin Pop | type Idx = Int |
86 | 608efcce | Iustin Pop | |
87 | 9188aeef | Iustin Pop | -- | The node index type. |
88 | 608efcce | Iustin Pop | type Ndx = Int |
89 | 608efcce | Iustin Pop | |
90 | 0dc1bf87 | Iustin Pop | -- | The group index type. |
91 | 0dc1bf87 | Iustin Pop | type Gdx = Int |
92 | 0dc1bf87 | Iustin Pop | |
93 | 9188aeef | Iustin Pop | -- | The type used to hold name-to-idx mappings. |
94 | 2d0ca2c5 | Iustin Pop | type NameAssoc = M.Map String Int |
95 | e4c5beaf | Iustin Pop | |
96 | 92e32d76 | Iustin Pop | -- | A separate name for the cluster score type. |
97 | 92e32d76 | Iustin Pop | type Score = Double |
98 | 92e32d76 | Iustin Pop | |
99 | 2180829f | Iustin Pop | -- | A separate name for a weight metric. |
100 | 2180829f | Iustin Pop | type Weight = Double |
101 | 2180829f | Iustin Pop | |
102 | 0dc1bf87 | Iustin Pop | -- | The Group UUID type. |
103 | c4d98278 | Iustin Pop | type GroupID = String |
104 | c4d98278 | Iustin Pop | |
105 | f3f76ccc | Iustin Pop | -- | Default group UUID (just a string, not a real UUID). |
106 | f3f76ccc | Iustin Pop | defaultGroupID :: GroupID |
107 | f3f76ccc | Iustin Pop | defaultGroupID = "00000000-0000-0000-0000-000000000000" |
108 | f3f76ccc | Iustin Pop | |
109 | b906d7c1 | Iustin Pop | -- | Mirroring type. |
110 | b906d7c1 | Iustin Pop | data MirrorType = MirrorNone -- ^ No mirroring/movability |
111 | b906d7c1 | Iustin Pop | | MirrorInternal -- ^ DRBD-type mirroring |
112 | b906d7c1 | Iustin Pop | | MirrorExternal -- ^ Shared-storage type mirroring |
113 | 139c0683 | Iustin Pop | deriving (Eq, Show) |
114 | b906d7c1 | Iustin Pop | |
115 | b906d7c1 | Iustin Pop | -- | Correspondence between disk template and mirror type. |
116 | b906d7c1 | Iustin Pop | templateMirrorType :: DiskTemplate -> MirrorType |
117 | b906d7c1 | Iustin Pop | templateMirrorType DTDiskless = MirrorExternal |
118 | b906d7c1 | Iustin Pop | templateMirrorType DTFile = MirrorNone |
119 | b906d7c1 | Iustin Pop | templateMirrorType DTSharedFile = MirrorExternal |
120 | b906d7c1 | Iustin Pop | templateMirrorType DTPlain = MirrorNone |
121 | b906d7c1 | Iustin Pop | templateMirrorType DTBlock = MirrorExternal |
122 | b906d7c1 | Iustin Pop | templateMirrorType DTDrbd8 = MirrorInternal |
123 | b906d7c1 | Iustin Pop | templateMirrorType DTRbd = MirrorExternal |
124 | 277a2ec9 | Constantinos Venetsanopoulos | templateMirrorType DTExt = MirrorExternal |
125 | b906d7c1 | Iustin Pop | |
126 | 1f9066c0 | Iustin Pop | -- | The resource spec type. |
127 | 1f9066c0 | Iustin Pop | data RSpec = RSpec |
128 | ebf38064 | Iustin Pop | { rspecCpu :: Int -- ^ Requested VCPUs |
129 | ebf38064 | Iustin Pop | , rspecMem :: Int -- ^ Requested memory |
130 | ebf38064 | Iustin Pop | , rspecDsk :: Int -- ^ Requested disk |
131 | 139c0683 | Iustin Pop | } deriving (Show, Eq) |
132 | 1f9066c0 | Iustin Pop | |
133 | 76a20994 | Iustin Pop | -- | Allocation stats type. This is used instead of 'RSpec' (which was |
134 | 76a20994 | Iustin Pop | -- used at first), because we need to track more stats. The actual |
135 | 76a20994 | Iustin Pop | -- data can refer either to allocated, or available, etc. values |
136 | 76a20994 | Iustin Pop | -- depending on the context. See also |
137 | 76a20994 | Iustin Pop | -- 'Cluster.computeAllocationDelta'. |
138 | 76a20994 | Iustin Pop | data AllocInfo = AllocInfo |
139 | 76a20994 | Iustin Pop | { allocInfoVCpus :: Int -- ^ VCPUs |
140 | 76a20994 | Iustin Pop | , allocInfoNCpus :: Double -- ^ Normalised CPUs |
141 | 76a20994 | Iustin Pop | , allocInfoMem :: Int -- ^ Memory |
142 | 76a20994 | Iustin Pop | , allocInfoDisk :: Int -- ^ Disk |
143 | 139c0683 | Iustin Pop | } deriving (Show, Eq) |
144 | a07343b2 | Iustin Pop | |
145 | 80d7d8a1 | Iustin Pop | -- | Currently used, possibly to allocate, unallocable. |
146 | 80d7d8a1 | Iustin Pop | type AllocStats = (AllocInfo, AllocInfo, AllocInfo) |
147 | 80d7d8a1 | Iustin Pop | |
148 | a07343b2 | Iustin Pop | -- | Instance specification type. |
149 | a07343b2 | Iustin Pop | $(THH.buildObject "ISpec" "iSpec" |
150 | 9cda4d6a | Iustin Pop | [ THH.renameField "MemorySize" $ THH.simpleField C.ispecMemSize [t| Int |] |
151 | 9cda4d6a | Iustin Pop | , THH.renameField "CpuCount" $ THH.simpleField C.ispecCpuCount [t| Int |] |
152 | 9cda4d6a | Iustin Pop | , THH.renameField "DiskSize" $ THH.simpleField C.ispecDiskSize [t| Int |] |
153 | 9cda4d6a | Iustin Pop | , THH.renameField "DiskCount" $ THH.simpleField C.ispecDiskCount [t| Int |] |
154 | 9cda4d6a | Iustin Pop | , THH.renameField "NicCount" $ THH.simpleField C.ispecNicCount [t| Int |] |
155 | 9cda4d6a | Iustin Pop | , THH.renameField "SpindleUse" $ THH.simpleField C.ispecSpindleUse [t| Int |] |
156 | a07343b2 | Iustin Pop | ]) |
157 | a07343b2 | Iustin Pop | |
158 | d02f941e | Iustin Pop | -- | The default minimum ispec. |
159 | d02f941e | Iustin Pop | defMinISpec :: ISpec |
160 | d02f941e | Iustin Pop | defMinISpec = ISpec { iSpecMemorySize = C.ipolicyDefaultsMinMemorySize |
161 | d02f941e | Iustin Pop | , iSpecCpuCount = C.ipolicyDefaultsMinCpuCount |
162 | d02f941e | Iustin Pop | , iSpecDiskSize = C.ipolicyDefaultsMinDiskSize |
163 | d02f941e | Iustin Pop | , iSpecDiskCount = C.ipolicyDefaultsMinDiskCount |
164 | d02f941e | Iustin Pop | , iSpecNicCount = C.ipolicyDefaultsMinNicCount |
165 | d953a965 | Renรฉ Nussbaumer | , iSpecSpindleUse = C.ipolicyDefaultsMinSpindleUse |
166 | d02f941e | Iustin Pop | } |
167 | d02f941e | Iustin Pop | |
168 | d02f941e | Iustin Pop | -- | The default standard ispec. |
169 | d02f941e | Iustin Pop | defStdISpec :: ISpec |
170 | d02f941e | Iustin Pop | defStdISpec = ISpec { iSpecMemorySize = C.ipolicyDefaultsStdMemorySize |
171 | d02f941e | Iustin Pop | , iSpecCpuCount = C.ipolicyDefaultsStdCpuCount |
172 | d02f941e | Iustin Pop | , iSpecDiskSize = C.ipolicyDefaultsStdDiskSize |
173 | d02f941e | Iustin Pop | , iSpecDiskCount = C.ipolicyDefaultsStdDiskCount |
174 | d02f941e | Iustin Pop | , iSpecNicCount = C.ipolicyDefaultsStdNicCount |
175 | d953a965 | Renรฉ Nussbaumer | , iSpecSpindleUse = C.ipolicyDefaultsStdSpindleUse |
176 | d02f941e | Iustin Pop | } |
177 | d02f941e | Iustin Pop | |
178 | d02f941e | Iustin Pop | -- | The default max ispec. |
179 | d02f941e | Iustin Pop | defMaxISpec :: ISpec |
180 | d02f941e | Iustin Pop | defMaxISpec = ISpec { iSpecMemorySize = C.ipolicyDefaultsMaxMemorySize |
181 | d02f941e | Iustin Pop | , iSpecCpuCount = C.ipolicyDefaultsMaxCpuCount |
182 | d02f941e | Iustin Pop | , iSpecDiskSize = C.ipolicyDefaultsMaxDiskSize |
183 | d02f941e | Iustin Pop | , iSpecDiskCount = C.ipolicyDefaultsMaxDiskCount |
184 | d02f941e | Iustin Pop | , iSpecNicCount = C.ipolicyDefaultsMaxNicCount |
185 | d953a965 | Renรฉ Nussbaumer | , iSpecSpindleUse = C.ipolicyDefaultsMaxSpindleUse |
186 | d02f941e | Iustin Pop | } |
187 | d02f941e | Iustin Pop | |
188 | a07343b2 | Iustin Pop | -- | Instance policy type. |
189 | a07343b2 | Iustin Pop | $(THH.buildObject "IPolicy" "iPolicy" |
190 | cd79cd83 | Iustin Pop | [ THH.renameField "StdSpec" $ THH.simpleField C.ispecsStd [t| ISpec |] |
191 | cd79cd83 | Iustin Pop | , THH.renameField "MinSpec" $ THH.simpleField C.ispecsMin [t| ISpec |] |
192 | cd79cd83 | Iustin Pop | , THH.renameField "MaxSpec" $ THH.simpleField C.ispecsMax [t| ISpec |] |
193 | fc42a408 | Iustin Pop | , THH.renameField "DiskTemplates" $ |
194 | cd79cd83 | Iustin Pop | THH.simpleField C.ipolicyDts [t| [DiskTemplate] |] |
195 | e8fa4ff6 | Iustin Pop | , THH.renameField "VcpuRatio" $ |
196 | cd79cd83 | Iustin Pop | THH.simpleField C.ipolicyVcpuRatio [t| Double |] |
197 | c22d4dd4 | Iustin Pop | , THH.renameField "SpindleRatio" $ |
198 | c22d4dd4 | Iustin Pop | THH.simpleField C.ipolicySpindleRatio [t| Double |] |
199 | a07343b2 | Iustin Pop | ]) |
200 | a07343b2 | Iustin Pop | |
201 | 304f9292 | Iustin Pop | -- | Converts an ISpec type to a RSpec one. |
202 | 304f9292 | Iustin Pop | rspecFromISpec :: ISpec -> RSpec |
203 | 304f9292 | Iustin Pop | rspecFromISpec ispec = RSpec { rspecCpu = iSpecCpuCount ispec |
204 | 304f9292 | Iustin Pop | , rspecMem = iSpecMemorySize ispec |
205 | 304f9292 | Iustin Pop | , rspecDsk = iSpecDiskSize ispec |
206 | 304f9292 | Iustin Pop | } |
207 | 304f9292 | Iustin Pop | |
208 | d02f941e | Iustin Pop | -- | The default instance policy. |
209 | d02f941e | Iustin Pop | defIPolicy :: IPolicy |
210 | d02f941e | Iustin Pop | defIPolicy = IPolicy { iPolicyStdSpec = defStdISpec |
211 | d02f941e | Iustin Pop | , iPolicyMinSpec = defMinISpec |
212 | d02f941e | Iustin Pop | , iPolicyMaxSpec = defMaxISpec |
213 | fc42a408 | Iustin Pop | -- hardcoding here since Constants.hs exports the |
214 | fc42a408 | Iustin Pop | -- string values, not the actual type; and in |
215 | fc42a408 | Iustin Pop | -- htools, we are mostly looking at DRBD |
216 | 810d051f | Iustin Pop | , iPolicyDiskTemplates = [minBound..maxBound] |
217 | e8fa4ff6 | Iustin Pop | , iPolicyVcpuRatio = C.ipolicyDefaultsVcpuRatio |
218 | c22d4dd4 | Iustin Pop | , iPolicySpindleRatio = C.ipolicyDefaultsSpindleRatio |
219 | d02f941e | Iustin Pop | } |
220 | d02f941e | Iustin Pop | |
221 | 2180829f | Iustin Pop | -- | The dynamic resource specs of a machine (i.e. load or load |
222 | 2180829f | Iustin Pop | -- capacity, as opposed to size). |
223 | 2180829f | Iustin Pop | data DynUtil = DynUtil |
224 | ebf38064 | Iustin Pop | { cpuWeight :: Weight -- ^ Standardised CPU usage |
225 | ebf38064 | Iustin Pop | , memWeight :: Weight -- ^ Standardised memory load |
226 | ebf38064 | Iustin Pop | , dskWeight :: Weight -- ^ Standardised disk I\/O usage |
227 | ebf38064 | Iustin Pop | , netWeight :: Weight -- ^ Standardised network usage |
228 | 139c0683 | Iustin Pop | } deriving (Show, Eq) |
229 | 2180829f | Iustin Pop | |
230 | 525bfb36 | Iustin Pop | -- | Initial empty utilisation. |
231 | 2180829f | Iustin Pop | zeroUtil :: DynUtil |
232 | 2180829f | Iustin Pop | zeroUtil = DynUtil { cpuWeight = 0, memWeight = 0 |
233 | 2180829f | Iustin Pop | , dskWeight = 0, netWeight = 0 } |
234 | 2180829f | Iustin Pop | |
235 | 525bfb36 | Iustin Pop | -- | Base utilisation (used when no actual utilisation data is |
236 | 525bfb36 | Iustin Pop | -- supplied). |
237 | ee9724b9 | Iustin Pop | baseUtil :: DynUtil |
238 | ee9724b9 | Iustin Pop | baseUtil = DynUtil { cpuWeight = 1, memWeight = 1 |
239 | ee9724b9 | Iustin Pop | , dskWeight = 1, netWeight = 1 } |
240 | ee9724b9 | Iustin Pop | |
241 | 525bfb36 | Iustin Pop | -- | Sum two utilisation records. |
242 | 2180829f | Iustin Pop | addUtil :: DynUtil -> DynUtil -> DynUtil |
243 | 2180829f | Iustin Pop | addUtil (DynUtil a1 a2 a3 a4) (DynUtil b1 b2 b3 b4) = |
244 | ebf38064 | Iustin Pop | DynUtil (a1+b1) (a2+b2) (a3+b3) (a4+b4) |
245 | 2180829f | Iustin Pop | |
246 | 525bfb36 | Iustin Pop | -- | Substracts one utilisation record from another. |
247 | 2180829f | Iustin Pop | subUtil :: DynUtil -> DynUtil -> DynUtil |
248 | 2180829f | Iustin Pop | subUtil (DynUtil a1 a2 a3 a4) (DynUtil b1 b2 b3 b4) = |
249 | ebf38064 | Iustin Pop | DynUtil (a1-b1) (a2-b2) (a3-b3) (a4-b4) |
250 | 2180829f | Iustin Pop | |
251 | 66dac8e0 | Iustin Pop | -- | The description of an instance placement. It contains the |
252 | 66dac8e0 | Iustin Pop | -- instance index, the new primary and secondary node, the move being |
253 | 66dac8e0 | Iustin Pop | -- performed and the score of the cluster after the move. |
254 | 66dac8e0 | Iustin Pop | type Placement = (Idx, Ndx, Ndx, IMove, Score) |
255 | 92e32d76 | Iustin Pop | |
256 | 525bfb36 | Iustin Pop | -- | An instance move definition. |
257 | 92e32d76 | Iustin Pop | data IMove = Failover -- ^ Failover the instance (f) |
258 | 0c8cef35 | Iustin Pop | | FailoverToAny Ndx -- ^ Failover to a random node |
259 | 0c8cef35 | Iustin Pop | -- (fa:np), for shared storage |
260 | 92e32d76 | Iustin Pop | | ReplacePrimary Ndx -- ^ Replace primary (f, r:np, f) |
261 | 92e32d76 | Iustin Pop | | ReplaceSecondary Ndx -- ^ Replace secondary (r:ns) |
262 | 92e32d76 | Iustin Pop | | ReplaceAndFailover Ndx -- ^ Replace secondary, failover (r:np, f) |
263 | 92e32d76 | Iustin Pop | | FailoverAndReplace Ndx -- ^ Failover, replace secondary (f, r:ns) |
264 | 139c0683 | Iustin Pop | deriving (Show) |
265 | 92e32d76 | Iustin Pop | |
266 | 0e8ae201 | Iustin Pop | -- | Formatted solution output for one move (involved nodes and |
267 | 525bfb36 | Iustin Pop | -- commands. |
268 | 924f9c16 | Iustin Pop | type MoveJob = ([Ndx], Idx, IMove, [String]) |
269 | 0e8ae201 | Iustin Pop | |
270 | 525bfb36 | Iustin Pop | -- | Unknown field in table output. |
271 | 82ea2874 | Iustin Pop | unknownField :: String |
272 | 82ea2874 | Iustin Pop | unknownField = "<unknown field>" |
273 | 82ea2874 | Iustin Pop | |
274 | 525bfb36 | Iustin Pop | -- | A list of command elements. |
275 | 0e8ae201 | Iustin Pop | type JobSet = [MoveJob] |
276 | 0e8ae201 | Iustin Pop | |
277 | f4c0b8c5 | Iustin Pop | -- | Default max disk usage ratio. |
278 | f4c0b8c5 | Iustin Pop | defReservedDiskRatio :: Double |
279 | f4c0b8c5 | Iustin Pop | defReservedDiskRatio = 0 |
280 | f4c0b8c5 | Iustin Pop | |
281 | 1e3dccc8 | Iustin Pop | -- | Base memory unit. |
282 | 1e3dccc8 | Iustin Pop | unitMem :: Int |
283 | 1e3dccc8 | Iustin Pop | unitMem = 64 |
284 | 1e3dccc8 | Iustin Pop | |
285 | 1e3dccc8 | Iustin Pop | -- | Base disk unit. |
286 | 1e3dccc8 | Iustin Pop | unitDsk :: Int |
287 | 1e3dccc8 | Iustin Pop | unitDsk = 256 |
288 | 1e3dccc8 | Iustin Pop | |
289 | 1e3dccc8 | Iustin Pop | -- | Base vcpus unit. |
290 | 1e3dccc8 | Iustin Pop | unitCpu :: Int |
291 | 1e3dccc8 | Iustin Pop | unitCpu = 1 |
292 | 1e3dccc8 | Iustin Pop | |
293 | 525bfb36 | Iustin Pop | -- | Reason for an operation's falure. |
294 | f2280553 | Iustin Pop | data FailMode = FailMem -- ^ Failed due to not enough RAM |
295 | f2280553 | Iustin Pop | | FailDisk -- ^ Failed due to not enough disk |
296 | f2280553 | Iustin Pop | | FailCPU -- ^ Failed due to not enough CPU capacity |
297 | f2280553 | Iustin Pop | | FailN1 -- ^ Failed due to not passing N1 checks |
298 | 5f0b9579 | Iustin Pop | | FailTags -- ^ Failed due to tag exclusion |
299 | 139c0683 | Iustin Pop | deriving (Eq, Enum, Bounded, Show) |
300 | f2280553 | Iustin Pop | |
301 | 525bfb36 | Iustin Pop | -- | List with failure statistics. |
302 | 478df686 | Iustin Pop | type FailStats = [(FailMode, Int)] |
303 | 478df686 | Iustin Pop | |
304 | 525bfb36 | Iustin Pop | -- | Either-like data-type customized for our failure modes. |
305 | a30b473c | Iustin Pop | -- |
306 | a30b473c | Iustin Pop | -- The failure values for this monad track the specific allocation |
307 | a30b473c | Iustin Pop | -- failures, so this is not a general error-monad (compare with the |
308 | a30b473c | Iustin Pop | -- 'Result' data type). One downside is that this type cannot encode a |
309 | a8038349 | Iustin Pop | -- generic failure mode, hence our way to build a FailMode from string |
310 | a8038349 | Iustin Pop | -- will instead raise an exception. |
311 | a8038349 | Iustin Pop | type OpResult = GenericResult FailMode |
312 | f2280553 | Iustin Pop | |
313 | a8038349 | Iustin Pop | -- | 'FromString' instance for 'FailMode' designed to catch unintended |
314 | a8038349 | Iustin Pop | -- use as a general monad. |
315 | a8038349 | Iustin Pop | instance FromString FailMode where |
316 | a8038349 | Iustin Pop | mkFromString v = error $ "Programming error: OpResult used as generic monad" |
317 | a8038349 | Iustin Pop | ++ v |
318 | f2280553 | Iustin Pop | |
319 | a30b473c | Iustin Pop | -- | Conversion from 'OpResult' to 'Result'. |
320 | a30b473c | Iustin Pop | opToResult :: OpResult a -> Result a |
321 | a8038349 | Iustin Pop | opToResult (Bad f) = Bad $ show f |
322 | a8038349 | Iustin Pop | opToResult (Ok v) = Ok v |
323 | a30b473c | Iustin Pop | |
324 | 9188aeef | Iustin Pop | -- | A generic class for items that have updateable names and indices. |
325 | 497e30a1 | Iustin Pop | class Element a where |
326 | ebf38064 | Iustin Pop | -- | Returns the name of the element |
327 | ebf38064 | Iustin Pop | nameOf :: a -> String |
328 | ebf38064 | Iustin Pop | -- | Returns all the known names of the element |
329 | ebf38064 | Iustin Pop | allNames :: a -> [String] |
330 | ebf38064 | Iustin Pop | -- | Returns the index of the element |
331 | ebf38064 | Iustin Pop | idxOf :: a -> Int |
332 | ebf38064 | Iustin Pop | -- | Updates the alias of the element |
333 | ebf38064 | Iustin Pop | setAlias :: a -> String -> a |
334 | ebf38064 | Iustin Pop | -- | Compute the alias by stripping a given suffix (domain) from |
335 | ebf38064 | Iustin Pop | -- the name |
336 | ebf38064 | Iustin Pop | computeAlias :: String -> a -> a |
337 | ebf38064 | Iustin Pop | computeAlias dom e = setAlias e alias |
338 | ebf38064 | Iustin Pop | where alias = take (length name - length dom) name |
339 | ebf38064 | Iustin Pop | name = nameOf e |
340 | ebf38064 | Iustin Pop | -- | Updates the index of the element |
341 | ebf38064 | Iustin Pop | setIdx :: a -> Int -> a |
342 | 1fe412bb | Iustin Pop | |
343 | 1fe412bb | Iustin Pop | -- | The iallocator node-evacuate evac_mode type. |
344 | e9aaa3c6 | Iustin Pop | $(THH.declareSADT "EvacMode" |
345 | ebf38064 | Iustin Pop | [ ("ChangePrimary", 'C.iallocatorNevacPri) |
346 | ebf38064 | Iustin Pop | , ("ChangeSecondary", 'C.iallocatorNevacSec) |
347 | ebf38064 | Iustin Pop | , ("ChangeAll", 'C.iallocatorNevacAll) |
348 | ebf38064 | Iustin Pop | ]) |
349 | e9aaa3c6 | Iustin Pop | $(THH.makeJSONInstance ''EvacMode) |