root / htools / Ganeti / OpCodes.hs @ 96a12113
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1 | 702a4ee0 | Iustin Pop | {-| Implementation of the opcodes. |
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2 | 702a4ee0 | Iustin Pop | |
3 | 702a4ee0 | Iustin Pop | -} |
4 | 702a4ee0 | Iustin Pop | |
5 | 702a4ee0 | Iustin Pop | {- |
6 | 702a4ee0 | Iustin Pop | |
7 | e8230242 | Iustin Pop | Copyright (C) 2009, 2010, 2011 Google Inc. |
8 | 702a4ee0 | Iustin Pop | |
9 | 702a4ee0 | Iustin Pop | This program is free software; you can redistribute it and/or modify |
10 | 702a4ee0 | Iustin Pop | it under the terms of the GNU General Public License as published by |
11 | 702a4ee0 | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
12 | 702a4ee0 | Iustin Pop | (at your option) any later version. |
13 | 702a4ee0 | Iustin Pop | |
14 | 702a4ee0 | Iustin Pop | This program is distributed in the hope that it will be useful, but |
15 | 702a4ee0 | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | 702a4ee0 | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | 702a4ee0 | Iustin Pop | General Public License for more details. |
18 | 702a4ee0 | Iustin Pop | |
19 | 702a4ee0 | Iustin Pop | You should have received a copy of the GNU General Public License |
20 | 702a4ee0 | Iustin Pop | along with this program; if not, write to the Free Software |
21 | 702a4ee0 | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
22 | 702a4ee0 | Iustin Pop | 02110-1301, USA. |
23 | 702a4ee0 | Iustin Pop | |
24 | 702a4ee0 | Iustin Pop | -} |
25 | 702a4ee0 | Iustin Pop | |
26 | 702a4ee0 | Iustin Pop | module Ganeti.OpCodes |
27 | 702a4ee0 | Iustin Pop | ( OpCode(..) |
28 | 702a4ee0 | Iustin Pop | , ReplaceDisksMode(..) |
29 | 702a4ee0 | Iustin Pop | , opID |
30 | 702a4ee0 | Iustin Pop | ) where |
31 | 702a4ee0 | Iustin Pop | |
32 | 702a4ee0 | Iustin Pop | import Control.Monad |
33 | 0903280b | Iustin Pop | import Text.JSON (readJSON, showJSON, makeObj, JSON) |
34 | 702a4ee0 | Iustin Pop | import qualified Text.JSON as J |
35 | 702a4ee0 | Iustin Pop | import Text.JSON.Types |
36 | 702a4ee0 | Iustin Pop | |
37 | 702a4ee0 | Iustin Pop | import Ganeti.HTools.Utils |
38 | 702a4ee0 | Iustin Pop | |
39 | 525bfb36 | Iustin Pop | -- | Replace disks type. |
40 | 702a4ee0 | Iustin Pop | data ReplaceDisksMode = ReplaceOnPrimary |
41 | 702a4ee0 | Iustin Pop | | ReplaceOnSecondary |
42 | 702a4ee0 | Iustin Pop | | ReplaceNewSecondary |
43 | 702a4ee0 | Iustin Pop | | ReplaceAuto |
44 | 6bc39970 | Iustin Pop | deriving (Show, Read, Eq) |
45 | 702a4ee0 | Iustin Pop | |
46 | 702a4ee0 | Iustin Pop | instance JSON ReplaceDisksMode where |
47 | 702a4ee0 | Iustin Pop | showJSON m = case m of |
48 | 702a4ee0 | Iustin Pop | ReplaceOnPrimary -> showJSON "replace_on_primary" |
49 | 702a4ee0 | Iustin Pop | ReplaceOnSecondary -> showJSON "replace_on_secondary" |
50 | 702a4ee0 | Iustin Pop | ReplaceNewSecondary -> showJSON "replace_new_secondary" |
51 | 702a4ee0 | Iustin Pop | ReplaceAuto -> showJSON "replace_auto" |
52 | 702a4ee0 | Iustin Pop | readJSON s = case readJSON s of |
53 | 702a4ee0 | Iustin Pop | J.Ok "replace_on_primary" -> J.Ok ReplaceOnPrimary |
54 | 702a4ee0 | Iustin Pop | J.Ok "replace_on_secondary" -> J.Ok ReplaceOnSecondary |
55 | 702a4ee0 | Iustin Pop | J.Ok "replace_new_secondary" -> J.Ok ReplaceNewSecondary |
56 | 702a4ee0 | Iustin Pop | J.Ok "replace_auto" -> J.Ok ReplaceAuto |
57 | 702a4ee0 | Iustin Pop | _ -> J.Error "Can't parse a valid ReplaceDisksMode" |
58 | 702a4ee0 | Iustin Pop | |
59 | 525bfb36 | Iustin Pop | -- | OpCode representation. |
60 | 525bfb36 | Iustin Pop | -- |
61 | 525bfb36 | Iustin Pop | -- We only implement a subset of Ganeti opcodes, but only what we |
62 | 525bfb36 | Iustin Pop | -- actually use in the htools codebase. |
63 | 702a4ee0 | Iustin Pop | data OpCode = OpTestDelay Double Bool [String] |
64 | 10028866 | René Nussbaumer | | OpInstanceReplaceDisks String (Maybe String) ReplaceDisksMode |
65 | 702a4ee0 | Iustin Pop | [Int] (Maybe String) |
66 | 10028866 | René Nussbaumer | | OpInstanceFailover String Bool |
67 | 10028866 | René Nussbaumer | | OpInstanceMigrate String Bool Bool Bool |
68 | 6bc39970 | Iustin Pop | deriving (Show, Read, Eq) |
69 | 702a4ee0 | Iustin Pop | |
70 | 702a4ee0 | Iustin Pop | |
71 | 525bfb36 | Iustin Pop | -- | Computes the OP_ID for an OpCode. |
72 | 702a4ee0 | Iustin Pop | opID :: OpCode -> String |
73 | 702a4ee0 | Iustin Pop | opID (OpTestDelay _ _ _) = "OP_TEST_DELAY" |
74 | 10028866 | René Nussbaumer | opID (OpInstanceReplaceDisks _ _ _ _ _) = "OP_INSTANCE_REPLACE_DISKS" |
75 | 10028866 | René Nussbaumer | opID (OpInstanceFailover _ _) = "OP_INSTANCE_FAILOVER" |
76 | 10028866 | René Nussbaumer | opID (OpInstanceMigrate _ _ _ _) = "OP_INSTANCE_MIGRATE" |
77 | 702a4ee0 | Iustin Pop | |
78 | 525bfb36 | Iustin Pop | -- | Loads an OpCode from the JSON serialised form. |
79 | 702a4ee0 | Iustin Pop | loadOpCode :: JSValue -> J.Result OpCode |
80 | 702a4ee0 | Iustin Pop | loadOpCode v = do |
81 | 262f3e6c | Iustin Pop | o <- liftM J.fromJSObject (readJSON v) |
82 | e8230242 | Iustin Pop | let extract x = fromObj o x |
83 | e8230242 | Iustin Pop | op_id <- extract "OP_ID" |
84 | 702a4ee0 | Iustin Pop | case op_id of |
85 | 702a4ee0 | Iustin Pop | "OP_TEST_DELAY" -> do |
86 | e8230242 | Iustin Pop | on_nodes <- extract "on_nodes" |
87 | e8230242 | Iustin Pop | on_master <- extract "on_master" |
88 | e8230242 | Iustin Pop | duration <- extract "duration" |
89 | 702a4ee0 | Iustin Pop | return $ OpTestDelay duration on_master on_nodes |
90 | 702a4ee0 | Iustin Pop | "OP_INSTANCE_REPLACE_DISKS" -> do |
91 | e8230242 | Iustin Pop | inst <- extract "instance_name" |
92 | e8230242 | Iustin Pop | node <- maybeFromObj o "remote_node" |
93 | e8230242 | Iustin Pop | mode <- extract "mode" |
94 | e8230242 | Iustin Pop | disks <- extract "disks" |
95 | e8230242 | Iustin Pop | ialloc <- maybeFromObj o "iallocator" |
96 | 10028866 | René Nussbaumer | return $ OpInstanceReplaceDisks inst node mode disks ialloc |
97 | 702a4ee0 | Iustin Pop | "OP_INSTANCE_FAILOVER" -> do |
98 | e8230242 | Iustin Pop | inst <- extract "instance_name" |
99 | e8230242 | Iustin Pop | consist <- extract "ignore_consistency" |
100 | 10028866 | René Nussbaumer | return $ OpInstanceFailover inst consist |
101 | 702a4ee0 | Iustin Pop | "OP_INSTANCE_MIGRATE" -> do |
102 | e8230242 | Iustin Pop | inst <- extract "instance_name" |
103 | e8230242 | Iustin Pop | live <- extract "live" |
104 | e8230242 | Iustin Pop | cleanup <- extract "cleanup" |
105 | 9470b6ee | Iustin Pop | allow_failover <- fromObjWithDefault o "allow_failover" False |
106 | 10028866 | René Nussbaumer | return $ OpInstanceMigrate inst live cleanup allow_failover |
107 | 702a4ee0 | Iustin Pop | _ -> J.Error $ "Unknown opcode " ++ op_id |
108 | 702a4ee0 | Iustin Pop | |
109 | 525bfb36 | Iustin Pop | -- | Serialises an opcode to JSON. |
110 | 702a4ee0 | Iustin Pop | saveOpCode :: OpCode -> JSValue |
111 | 702a4ee0 | Iustin Pop | saveOpCode op@(OpTestDelay duration on_master on_nodes) = |
112 | 702a4ee0 | Iustin Pop | let ol = [ ("OP_ID", showJSON $ opID op) |
113 | 702a4ee0 | Iustin Pop | , ("duration", showJSON duration) |
114 | 702a4ee0 | Iustin Pop | , ("on_master", showJSON on_master) |
115 | 702a4ee0 | Iustin Pop | , ("on_nodes", showJSON on_nodes) ] |
116 | 702a4ee0 | Iustin Pop | in makeObj ol |
117 | 702a4ee0 | Iustin Pop | |
118 | 10028866 | René Nussbaumer | saveOpCode op@(OpInstanceReplaceDisks inst node mode disks iallocator) = |
119 | 702a4ee0 | Iustin Pop | let ol = [ ("OP_ID", showJSON $ opID op) |
120 | 702a4ee0 | Iustin Pop | , ("instance_name", showJSON inst) |
121 | 702a4ee0 | Iustin Pop | , ("mode", showJSON mode) |
122 | 702a4ee0 | Iustin Pop | , ("disks", showJSON disks)] |
123 | 702a4ee0 | Iustin Pop | ol2 = case node of |
124 | 702a4ee0 | Iustin Pop | Just n -> ("remote_node", showJSON n):ol |
125 | 702a4ee0 | Iustin Pop | Nothing -> ol |
126 | 702a4ee0 | Iustin Pop | ol3 = case iallocator of |
127 | 702a4ee0 | Iustin Pop | Just i -> ("iallocator", showJSON i):ol2 |
128 | 702a4ee0 | Iustin Pop | Nothing -> ol2 |
129 | 702a4ee0 | Iustin Pop | in makeObj ol3 |
130 | 702a4ee0 | Iustin Pop | |
131 | 10028866 | René Nussbaumer | saveOpCode op@(OpInstanceFailover inst consist) = |
132 | 702a4ee0 | Iustin Pop | let ol = [ ("OP_ID", showJSON $ opID op) |
133 | 702a4ee0 | Iustin Pop | , ("instance_name", showJSON inst) |
134 | 702a4ee0 | Iustin Pop | , ("ignore_consistency", showJSON consist) ] |
135 | 702a4ee0 | Iustin Pop | in makeObj ol |
136 | 702a4ee0 | Iustin Pop | |
137 | 10028866 | René Nussbaumer | saveOpCode op@(OpInstanceMigrate inst live cleanup allow_failover) = |
138 | 702a4ee0 | Iustin Pop | let ol = [ ("OP_ID", showJSON $ opID op) |
139 | 702a4ee0 | Iustin Pop | , ("instance_name", showJSON inst) |
140 | 702a4ee0 | Iustin Pop | , ("live", showJSON live) |
141 | 8d66f58a | René Nussbaumer | , ("cleanup", showJSON cleanup) |
142 | 8d66f58a | René Nussbaumer | , ("allow_failover", showJSON allow_failover) ] |
143 | 702a4ee0 | Iustin Pop | in makeObj ol |
144 | 702a4ee0 | Iustin Pop | |
145 | 702a4ee0 | Iustin Pop | instance JSON OpCode where |
146 | 702a4ee0 | Iustin Pop | readJSON = loadOpCode |
147 | 702a4ee0 | Iustin Pop | showJSON = saveOpCode |