root / Ganeti / OpCodes.hs @ 4f83a560
History | View | Annotate | Download (4.9 kB)
1 |
{-| Implementation of the opcodes. |
---|---|
2 |
|
3 |
-} |
4 |
|
5 |
{- |
6 |
|
7 |
Copyright (C) 2009 Google Inc. |
8 |
|
9 |
This program is free software; you can redistribute it and/or modify |
10 |
it under the terms of the GNU General Public License as published by |
11 |
the Free Software Foundation; either version 2 of the License, or |
12 |
(at your option) any later version. |
13 |
|
14 |
This program is distributed in the hope that it will be useful, but |
15 |
WITHOUT ANY WARRANTY; without even the implied warranty of |
16 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 |
General Public License for more details. |
18 |
|
19 |
You should have received a copy of the GNU General Public License |
20 |
along with this program; if not, write to the Free Software |
21 |
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
22 |
02110-1301, USA. |
23 |
|
24 |
-} |
25 |
|
26 |
module Ganeti.OpCodes |
27 |
( OpCode(..) |
28 |
, ReplaceDisksMode(..) |
29 |
, opID |
30 |
) where |
31 |
|
32 |
import Data.List |
33 |
import Control.Monad |
34 |
import Text.JSON (JSObject, JSValue, readJSON, showJSON, makeObj, JSON) |
35 |
import qualified Text.JSON as J |
36 |
import Text.JSON.Types |
37 |
|
38 |
import Ganeti.HTools.Utils |
39 |
|
40 |
data ReplaceDisksMode = ReplaceOnPrimary |
41 |
| ReplaceOnSecondary |
42 |
| ReplaceNewSecondary |
43 |
| ReplaceAuto |
44 |
deriving Show |
45 |
|
46 |
instance JSON ReplaceDisksMode where |
47 |
showJSON m = case m of |
48 |
ReplaceOnPrimary -> showJSON "replace_on_primary" |
49 |
ReplaceOnSecondary -> showJSON "replace_on_secondary" |
50 |
ReplaceNewSecondary -> showJSON "replace_new_secondary" |
51 |
ReplaceAuto -> showJSON "replace_auto" |
52 |
readJSON s = case readJSON s of |
53 |
J.Ok "replace_on_primary" -> J.Ok ReplaceOnPrimary |
54 |
J.Ok "replace_on_secondary" -> J.Ok ReplaceOnSecondary |
55 |
J.Ok "replace_new_secondary" -> J.Ok ReplaceNewSecondary |
56 |
J.Ok "replace_auto" -> J.Ok ReplaceAuto |
57 |
_ -> J.Error "Can't parse a valid ReplaceDisksMode" |
58 |
|
59 |
data OpCode = OpTestDelay Double Bool [String] |
60 |
| OpReplaceDisks String (Maybe String) ReplaceDisksMode |
61 |
[Int] (Maybe String) |
62 |
| OpFailoverInstance String Bool |
63 |
| OpMigrateInstance String Bool Bool |
64 |
deriving Show |
65 |
|
66 |
|
67 |
opID :: OpCode -> String |
68 |
opID (OpTestDelay _ _ _) = "OP_TEST_DELAY" |
69 |
opID (OpReplaceDisks _ _ _ _ _) = "OP_INSTANCE_REPLACE_DISKS" |
70 |
opID (OpFailoverInstance _ _) = "OP_INSTANCE_FAILOVER" |
71 |
opID (OpMigrateInstance _ _ _) = "OP_INSTANCE_MIGRATE" |
72 |
|
73 |
loadOpCode :: JSValue -> J.Result OpCode |
74 |
loadOpCode v = do |
75 |
o <- readJSON v::J.Result (JSObject JSValue) |
76 |
op_id <- fromObj "OP_ID" o |
77 |
case op_id of |
78 |
"OP_TEST_DELAY" -> do |
79 |
on_nodes <- fromObj "on_nodes" o |
80 |
on_master <- fromObj "on_master" o |
81 |
duration <- fromObj "duration" o |
82 |
return $ OpTestDelay duration on_master on_nodes |
83 |
"OP_INSTANCE_REPLACE_DISKS" -> do |
84 |
inst <- fromObj "instance_name" o |
85 |
node <- fromObj "remote_node" o |
86 |
mode <- fromObj "mode" o |
87 |
disks <- fromObj "disks" o |
88 |
ialloc <- fromObj "iallocator" o |
89 |
return $ OpReplaceDisks inst node mode disks ialloc |
90 |
"OP_INSTANCE_FAILOVER" -> do |
91 |
inst <- fromObj "instance_name" o |
92 |
consist <- fromObj "ignore_consistency" o |
93 |
return $ OpFailoverInstance inst consist |
94 |
"OP_INSTANCE_MIGRATE" -> do |
95 |
inst <- fromObj "instance_name" o |
96 |
live <- fromObj "live" o |
97 |
cleanup <- fromObj "cleanup" o |
98 |
return $ OpMigrateInstance inst live cleanup |
99 |
_ -> J.Error $ "Unknown opcode " ++ op_id |
100 |
|
101 |
saveOpCode :: OpCode -> JSValue |
102 |
saveOpCode op@(OpTestDelay duration on_master on_nodes) = |
103 |
let ol = [ ("OP_ID", showJSON $ opID op) |
104 |
, ("duration", showJSON duration) |
105 |
, ("on_master", showJSON on_master) |
106 |
, ("on_nodes", showJSON on_nodes) ] |
107 |
in makeObj ol |
108 |
|
109 |
saveOpCode op@(OpReplaceDisks inst node mode disks iallocator) = |
110 |
let ol = [ ("OP_ID", showJSON $ opID op) |
111 |
, ("instance_name", showJSON inst) |
112 |
, ("mode", showJSON mode) |
113 |
, ("disks", showJSON disks)] |
114 |
ol2 = case node of |
115 |
Just n -> ("remote_node", showJSON n):ol |
116 |
Nothing -> ol |
117 |
ol3 = case iallocator of |
118 |
Just i -> ("iallocator", showJSON i):ol2 |
119 |
Nothing -> ol2 |
120 |
in makeObj ol3 |
121 |
|
122 |
saveOpCode op@(OpFailoverInstance inst consist) = |
123 |
let ol = [ ("OP_ID", showJSON $ opID op) |
124 |
, ("instance_name", showJSON inst) |
125 |
, ("ignore_consistency", showJSON consist) ] |
126 |
in makeObj ol |
127 |
|
128 |
saveOpCode op@(OpMigrateInstance inst live cleanup) = |
129 |
let ol = [ ("OP_ID", showJSON $ opID op) |
130 |
, ("instance_name", showJSON inst) |
131 |
, ("live", showJSON live) |
132 |
, ("cleanup", showJSON cleanup) ] |
133 |
in makeObj ol |
134 |
|
135 |
instance JSON OpCode where |
136 |
readJSON = loadOpCode |
137 |
showJSON = saveOpCode |