root / src / Ganeti / DataCollectors / Drbd.hs @ ffc18bb2
History | View | Annotate | Download (7.6 kB)
1 | 332b1340 | Michele Tartara | {-| DRBD data collector. |
---|---|---|---|
2 | 332b1340 | Michele Tartara | |
3 | 332b1340 | Michele Tartara | -} |
4 | 332b1340 | Michele Tartara | |
5 | 332b1340 | Michele Tartara | {- |
6 | 332b1340 | Michele Tartara | |
7 | ddceb4c5 | Michele Tartara | Copyright (C) 2012, 2013 Google Inc. |
8 | 332b1340 | Michele Tartara | |
9 | 332b1340 | Michele Tartara | This program is free software; you can redistribute it and/or modify |
10 | 332b1340 | Michele Tartara | it under the terms of the GNU General Public License as published by |
11 | 332b1340 | Michele Tartara | the Free Software Foundation; either version 2 of the License, or |
12 | 332b1340 | Michele Tartara | (at your option) any later version. |
13 | 332b1340 | Michele Tartara | |
14 | 332b1340 | Michele Tartara | This program is distributed in the hope that it will be useful, but |
15 | 332b1340 | Michele Tartara | WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | 332b1340 | Michele Tartara | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | 332b1340 | Michele Tartara | General Public License for more details. |
18 | 332b1340 | Michele Tartara | |
19 | 332b1340 | Michele Tartara | You should have received a copy of the GNU General Public License |
20 | 332b1340 | Michele Tartara | along with this program; if not, write to the Free Software |
21 | 332b1340 | Michele Tartara | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
22 | 332b1340 | Michele Tartara | 02110-1301, USA. |
23 | 332b1340 | Michele Tartara | |
24 | 332b1340 | Michele Tartara | -} |
25 | 332b1340 | Michele Tartara | |
26 | 332b1340 | Michele Tartara | module Ganeti.DataCollectors.Drbd |
27 | 332b1340 | Michele Tartara | ( main |
28 | 332b1340 | Michele Tartara | , options |
29 | 332b1340 | Michele Tartara | , arguments |
30 | ddceb4c5 | Michele Tartara | , dcName |
31 | a895fa19 | Michele Tartara | , dcVersion |
32 | 834dc290 | Michele Tartara | , dcFormatVersion |
33 | f0e4b2a4 | Michele Tartara | , dcCategory |
34 | 54c7dff7 | Michele Tartara | , dcKind |
35 | 8c5419ee | Michele Tartara | , dcData |
36 | 332b1340 | Michele Tartara | ) where |
37 | 332b1340 | Michele Tartara | |
38 | 332b1340 | Michele Tartara | |
39 | 332b1340 | Michele Tartara | import qualified Control.Exception as E |
40 | d78970ba | Michele Tartara | import Control.Monad |
41 | 332b1340 | Michele Tartara | import Data.Attoparsec.Text.Lazy as A |
42 | 2d1c753d | Michele Tartara | import Data.List |
43 | d78970ba | Michele Tartara | import Data.Maybe |
44 | 332b1340 | Michele Tartara | import Data.Text.Lazy (pack, unpack) |
45 | d78970ba | Michele Tartara | import Network.BSD (getHostName) |
46 | d78970ba | Michele Tartara | import qualified Text.JSON as J |
47 | 332b1340 | Michele Tartara | |
48 | 332b1340 | Michele Tartara | import qualified Ganeti.BasicTypes as BT |
49 | 332b1340 | Michele Tartara | import qualified Ganeti.Constants as C |
50 | 332b1340 | Michele Tartara | import Ganeti.Block.Drbd.Parser(drbdStatusParser) |
51 | 2d1c753d | Michele Tartara | import Ganeti.Block.Drbd.Types |
52 | 332b1340 | Michele Tartara | import Ganeti.Common |
53 | d78970ba | Michele Tartara | import Ganeti.Confd.Client |
54 | d78970ba | Michele Tartara | import Ganeti.Confd.Types |
55 | 55abd2c7 | Iustin Pop | import Ganeti.DataCollectors.CLI |
56 | e71c47d3 | Michele Tartara | import Ganeti.DataCollectors.Types |
57 | 332b1340 | Michele Tartara | import Ganeti.Utils |
58 | 332b1340 | Michele Tartara | |
59 | 332b1340 | Michele Tartara | |
60 | 332b1340 | Michele Tartara | -- | The default path of the DRBD status file. |
61 | 332b1340 | Michele Tartara | -- It is hardcoded because it is not likely to change. |
62 | 332b1340 | Michele Tartara | defaultFile :: FilePath |
63 | 332b1340 | Michele Tartara | defaultFile = C.drbdStatusFile |
64 | 332b1340 | Michele Tartara | |
65 | 332b1340 | Michele Tartara | -- | The default setting for the maximum amount of not parsed character to |
66 | 332b1340 | Michele Tartara | -- print in case of error. |
67 | 332b1340 | Michele Tartara | -- It is set to use most of the screen estate on a standard 80x25 terminal. |
68 | 332b1340 | Michele Tartara | -- TODO: add the possibility to set this with a command line parameter. |
69 | 332b1340 | Michele Tartara | defaultCharNum :: Int |
70 | 332b1340 | Michele Tartara | defaultCharNum = 80*20 |
71 | 332b1340 | Michele Tartara | |
72 | e71c47d3 | Michele Tartara | -- | The name of this data collector. |
73 | e71c47d3 | Michele Tartara | dcName :: String |
74 | e71c47d3 | Michele Tartara | dcName = "drbd" |
75 | e71c47d3 | Michele Tartara | |
76 | a895fa19 | Michele Tartara | -- | The version of this data collector. |
77 | a895fa19 | Michele Tartara | dcVersion :: DCVersion |
78 | a895fa19 | Michele Tartara | dcVersion = DCVerBuiltin |
79 | a895fa19 | Michele Tartara | |
80 | e71c47d3 | Michele Tartara | -- | The version number for the data format of this data collector. |
81 | e71c47d3 | Michele Tartara | dcFormatVersion :: Int |
82 | e71c47d3 | Michele Tartara | dcFormatVersion = 1 |
83 | e71c47d3 | Michele Tartara | |
84 | f0e4b2a4 | Michele Tartara | -- | The category of this data collector. |
85 | f0e4b2a4 | Michele Tartara | dcCategory :: Maybe DCCategory |
86 | f0e4b2a4 | Michele Tartara | dcCategory = Just DCStorage |
87 | f0e4b2a4 | Michele Tartara | |
88 | 54c7dff7 | Michele Tartara | -- | The kind of this data collector. |
89 | 54c7dff7 | Michele Tartara | dcKind :: DCKind |
90 | 54c7dff7 | Michele Tartara | dcKind = DCKStatus |
91 | 54c7dff7 | Michele Tartara | |
92 | 8c5419ee | Michele Tartara | -- | The data exported by the data collector, taken from the default location. |
93 | 8c5419ee | Michele Tartara | dcData :: IO J.JSValue |
94 | 8c5419ee | Michele Tartara | dcData = buildJsonReport defaultFile Nothing |
95 | 8c5419ee | Michele Tartara | |
96 | 7a171e3f | Michele Tartara | -- * Command line options |
97 | 7a171e3f | Michele Tartara | |
98 | 332b1340 | Michele Tartara | options :: IO [OptType] |
99 | d78970ba | Michele Tartara | options = |
100 | d78970ba | Michele Tartara | return |
101 | d78970ba | Michele Tartara | [ oDrbdStatus |
102 | d78970ba | Michele Tartara | , oDrbdPairing |
103 | d78970ba | Michele Tartara | ] |
104 | 332b1340 | Michele Tartara | |
105 | 332b1340 | Michele Tartara | -- | The list of arguments supported by the program. |
106 | 332b1340 | Michele Tartara | arguments :: [ArgCompletion] |
107 | d78970ba | Michele Tartara | arguments = [ArgCompletion OptComplFile 0 (Just 0)] |
108 | 332b1340 | Michele Tartara | |
109 | d78970ba | Michele Tartara | -- | Get information about the pairing of DRBD minors and Ganeti instances |
110 | d78970ba | Michele Tartara | -- on the current node. The information is taken from the Confd client |
111 | d78970ba | Michele Tartara | -- or, if a filename is specified, from a JSON encoded file (for testing |
112 | d78970ba | Michele Tartara | -- purposes). |
113 | d78970ba | Michele Tartara | getPairingInfo :: Maybe String -> IO (BT.Result [DrbdInstMinor]) |
114 | d78970ba | Michele Tartara | getPairingInfo Nothing = do |
115 | d78970ba | Michele Tartara | curNode <- getHostName |
116 | 7dc27988 | Michele Tartara | client <- getConfdClient Nothing Nothing |
117 | d78970ba | Michele Tartara | reply <- query client ReqNodeDrbd $ PlainQuery curNode |
118 | d78970ba | Michele Tartara | return $ |
119 | d78970ba | Michele Tartara | case fmap (J.readJSONs . confdReplyAnswer) reply of |
120 | d78970ba | Michele Tartara | Just (J.Ok instMinor) -> BT.Ok instMinor |
121 | d78970ba | Michele Tartara | Just (J.Error msg) -> BT.Bad msg |
122 | d78970ba | Michele Tartara | Nothing -> BT.Bad "No answer from the Confd server" |
123 | d78970ba | Michele Tartara | getPairingInfo (Just filename) = do |
124 | d78970ba | Michele Tartara | content <- readFile filename |
125 | d78970ba | Michele Tartara | return $ |
126 | d78970ba | Michele Tartara | case J.decode content of |
127 | d78970ba | Michele Tartara | J.Ok instMinor -> BT.Ok instMinor |
128 | d78970ba | Michele Tartara | J.Error msg -> BT.Bad msg |
129 | d78970ba | Michele Tartara | |
130 | 2d1c753d | Michele Tartara | -- | Compute the status code and message, given the current DRBD data |
131 | 2d1c753d | Michele Tartara | -- The final state will have the code corresponding to the worst code of |
132 | 2d1c753d | Michele Tartara | -- all the devices, and the error message given from the concatenation of the |
133 | 2d1c753d | Michele Tartara | -- non-empty error messages. |
134 | 2d1c753d | Michele Tartara | computeStatus :: DRBDStatus -> DCStatus |
135 | 2d1c753d | Michele Tartara | computeStatus (DRBDStatus _ devInfos) = |
136 | 2d1c753d | Michele Tartara | let statuses = map computeDevStatus devInfos |
137 | 2d1c753d | Michele Tartara | (code, strList) = foldr mergeStatuses (DCSCOk, [""]) statuses |
138 | 2d1c753d | Michele Tartara | in DCStatus code $ intercalate "\n" strList |
139 | 2d1c753d | Michele Tartara | |
140 | 2d1c753d | Michele Tartara | -- | Helper function for merging statuses. |
141 | 2d1c753d | Michele Tartara | mergeStatuses :: (DCStatusCode, String) -> (DCStatusCode, [String]) |
142 | 2d1c753d | Michele Tartara | -> (DCStatusCode, [String]) |
143 | 2d1c753d | Michele Tartara | mergeStatuses (newStat, newStr) (storedStat, storedStrs) = |
144 | 2d1c753d | Michele Tartara | let resStat = max newStat storedStat |
145 | 2d1c753d | Michele Tartara | resStrs = |
146 | 2d1c753d | Michele Tartara | if newStr == "" |
147 | 2d1c753d | Michele Tartara | then storedStrs |
148 | 2d1c753d | Michele Tartara | else storedStrs ++ [newStr] |
149 | 2d1c753d | Michele Tartara | in (resStat, resStrs) |
150 | 2d1c753d | Michele Tartara | |
151 | 2d1c753d | Michele Tartara | -- | Compute the status of a DRBD device and its error message. |
152 | 2d1c753d | Michele Tartara | computeDevStatus :: DeviceInfo -> (DCStatusCode, String) |
153 | 2d1c753d | Michele Tartara | computeDevStatus (UnconfiguredDevice _) = (DCSCOk, "") |
154 | 2d1c753d | Michele Tartara | computeDevStatus dev = |
155 | 2d1c753d | Michele Tartara | let errMsg s = show (minorNumber dev) ++ ": " ++ s |
156 | 2d1c753d | Michele Tartara | compute_helper StandAlone = |
157 | 2d1c753d | Michele Tartara | (DCSCBad, errMsg "No network config available") |
158 | 2d1c753d | Michele Tartara | compute_helper Disconnecting = |
159 | 2d1c753d | Michele Tartara | (DCSCBad, errMsg "The peer is being disconnected") |
160 | 2d1c753d | Michele Tartara | compute_helper Unconnected = |
161 | 2d1c753d | Michele Tartara | (DCSCTempBad, errMsg "Trying to establish a network connection") |
162 | 2d1c753d | Michele Tartara | compute_helper Timeout = |
163 | 2d1c753d | Michele Tartara | (DCSCTempBad, errMsg "Communication problems between the peers") |
164 | 2d1c753d | Michele Tartara | compute_helper BrokenPipe = |
165 | 2d1c753d | Michele Tartara | (DCSCTempBad, errMsg "Communication problems between the peers") |
166 | 2d1c753d | Michele Tartara | compute_helper NetworkFailure = |
167 | 2d1c753d | Michele Tartara | (DCSCTempBad, errMsg "Communication problems between the peers") |
168 | 2d1c753d | Michele Tartara | compute_helper ProtocolError = |
169 | 2d1c753d | Michele Tartara | (DCSCTempBad, errMsg "Communication problems between the peers") |
170 | 2d1c753d | Michele Tartara | compute_helper TearDown = |
171 | 2d1c753d | Michele Tartara | (DCSCBad, errMsg "The peer is closing the connection") |
172 | 2d1c753d | Michele Tartara | compute_helper WFConnection = |
173 | 2d1c753d | Michele Tartara | (DCSCTempBad, errMsg "Trying to establish a network connection") |
174 | 2d1c753d | Michele Tartara | compute_helper WFReportParams = |
175 | 2d1c753d | Michele Tartara | (DCSCTempBad, errMsg "Trying to establish a network connection") |
176 | 2d1c753d | Michele Tartara | compute_helper Connected = (DCSCOk, "") |
177 | 2d1c753d | Michele Tartara | compute_helper StartingSyncS = (DCSCOk, "") |
178 | 2d1c753d | Michele Tartara | compute_helper StartingSyncT = (DCSCOk, "") |
179 | 2d1c753d | Michele Tartara | compute_helper WFBitMapS = (DCSCOk, "") |
180 | 2d1c753d | Michele Tartara | compute_helper WFBitMapT = (DCSCOk, "") |
181 | 2d1c753d | Michele Tartara | compute_helper WFSyncUUID = (DCSCOk, "") |
182 | 2d1c753d | Michele Tartara | compute_helper SyncSource = (DCSCOk, "") |
183 | 2d1c753d | Michele Tartara | compute_helper SyncTarget = (DCSCOk, "") |
184 | 2d1c753d | Michele Tartara | compute_helper PausedSyncS = (DCSCOk, "") |
185 | 2d1c753d | Michele Tartara | compute_helper PausedSyncT = (DCSCOk, "") |
186 | 2d1c753d | Michele Tartara | compute_helper VerifyS = (DCSCOk, "") |
187 | 2d1c753d | Michele Tartara | compute_helper VerifyT = (DCSCOk, "") |
188 | 2d1c753d | Michele Tartara | compute_helper Unconfigured = (DCSCOk, "") |
189 | 2d1c753d | Michele Tartara | in compute_helper $ connectionState dev |
190 | 2d1c753d | Michele Tartara | |
191 | 8c5419ee | Michele Tartara | -- | This function computes the JSON representation of the DRBD status. |
192 | 8c5419ee | Michele Tartara | buildJsonReport :: FilePath -> Maybe FilePath -> IO J.JSValue |
193 | 8c5419ee | Michele Tartara | buildJsonReport statusFile pairingFile = do |
194 | 332b1340 | Michele Tartara | contents <- |
195 | e71c47d3 | Michele Tartara | ((E.try $ readFile statusFile) :: IO (Either IOError String)) >>= |
196 | 638e0a6f | Iustin Pop | exitIfBad "reading from file" . either (BT.Bad . show) BT.Ok |
197 | e71c47d3 | Michele Tartara | pairingResult <- getPairingInfo pairingFile |
198 | d78970ba | Michele Tartara | pairing <- exitIfBad "Can't get pairing info" pairingResult |
199 | 2d1c753d | Michele Tartara | drbdData <- |
200 | 2d1c753d | Michele Tartara | case A.parse (drbdStatusParser pairing) $ pack contents of |
201 | 2d1c753d | Michele Tartara | A.Fail unparsedText contexts errorMessage -> exitErr $ |
202 | 2d1c753d | Michele Tartara | show (Prelude.take defaultCharNum $ unpack unparsedText) ++ "\n" |
203 | 2d1c753d | Michele Tartara | ++ show contexts ++ "\n" ++ errorMessage |
204 | 2d1c753d | Michele Tartara | A.Done _ drbdS -> return drbdS |
205 | 2d1c753d | Michele Tartara | let status = computeStatus drbdData |
206 | 2d1c753d | Michele Tartara | return . addStatus status $ J.showJSON drbdData |
207 | e71c47d3 | Michele Tartara | |
208 | e71c47d3 | Michele Tartara | -- | Main function. |
209 | e71c47d3 | Michele Tartara | main :: Options -> [String] -> IO () |
210 | e71c47d3 | Michele Tartara | main opts args = do |
211 | e71c47d3 | Michele Tartara | let statusFile = fromMaybe defaultFile $ optDrbdStatus opts |
212 | e71c47d3 | Michele Tartara | pairingFile = optDrbdPairing opts |
213 | e71c47d3 | Michele Tartara | unless (null args) . exitErr $ "This program takes exactly zero" ++ |
214 | e71c47d3 | Michele Tartara | " arguments, got '" ++ unwords args ++ "'" |
215 | 8c5419ee | Michele Tartara | report <- buildJsonReport statusFile pairingFile >>= |
216 | 8c5419ee | Michele Tartara | buildReport dcName dcVersion dcFormatVersion dcCategory dcKind |
217 | e71c47d3 | Michele Tartara | putStrLn $ J.encode report |