root / src / Ganeti / DataCollectors / InstStatus.hs @ b54ecf12
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1 | d7e9323b | Michele Tartara | {-| Instance status data collector. |
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2 | d7e9323b | Michele Tartara | |
3 | d7e9323b | Michele Tartara | -} |
4 | d7e9323b | Michele Tartara | |
5 | d7e9323b | Michele Tartara | {- |
6 | d7e9323b | Michele Tartara | |
7 | d7e9323b | Michele Tartara | Copyright (C) 2013 Google Inc. |
8 | d7e9323b | Michele Tartara | |
9 | d7e9323b | Michele Tartara | This program is free software; you can redistribute it and/or modify |
10 | d7e9323b | Michele Tartara | it under the terms of the GNU General Public License as published by |
11 | d7e9323b | Michele Tartara | the Free Software Foundation; either version 2 of the License, or |
12 | d7e9323b | Michele Tartara | (at your option) any later version. |
13 | d7e9323b | Michele Tartara | |
14 | d7e9323b | Michele Tartara | This program is distributed in the hope that it will be useful, but |
15 | d7e9323b | Michele Tartara | WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | d7e9323b | Michele Tartara | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | d7e9323b | Michele Tartara | General Public License for more details. |
18 | d7e9323b | Michele Tartara | |
19 | d7e9323b | Michele Tartara | You should have received a copy of the GNU General Public License |
20 | d7e9323b | Michele Tartara | along with this program; if not, write to the Free Software |
21 | d7e9323b | Michele Tartara | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
22 | d7e9323b | Michele Tartara | 02110-1301, USA. |
23 | d7e9323b | Michele Tartara | |
24 | d7e9323b | Michele Tartara | -} |
25 | d7e9323b | Michele Tartara | |
26 | d7e9323b | Michele Tartara | module Ganeti.DataCollectors.InstStatus |
27 | d7e9323b | Michele Tartara | ( main |
28 | d7e9323b | Michele Tartara | , options |
29 | d7e9323b | Michele Tartara | , arguments |
30 | 7660aaf3 | Michele Tartara | , dcName |
31 | 7660aaf3 | Michele Tartara | , dcVersion |
32 | 7660aaf3 | Michele Tartara | , dcFormatVersion |
33 | 7660aaf3 | Michele Tartara | , dcCategory |
34 | 7660aaf3 | Michele Tartara | , dcKind |
35 | e8b46463 | Michele Tartara | , dcReport |
36 | d7e9323b | Michele Tartara | ) where |
37 | d7e9323b | Michele Tartara | |
38 | d7e9323b | Michele Tartara | |
39 | 17ae9cdb | Michele Tartara | import Control.Exception.Base |
40 | 79731e21 | Michele Tartara | import Data.List |
41 | d7e9323b | Michele Tartara | import Data.Maybe |
42 | d7e9323b | Michele Tartara | import qualified Data.Map as Map |
43 | d7e9323b | Michele Tartara | import Network.BSD (getHostName) |
44 | d7e9323b | Michele Tartara | import qualified Text.JSON as J |
45 | d7e9323b | Michele Tartara | |
46 | d7e9323b | Michele Tartara | import qualified Ganeti.BasicTypes as BT |
47 | d7e9323b | Michele Tartara | import Ganeti.Confd.Client |
48 | d7e9323b | Michele Tartara | import Ganeti.Confd.Types |
49 | d7e9323b | Michele Tartara | import Ganeti.Common |
50 | d7e9323b | Michele Tartara | import Ganeti.DataCollectors.CLI |
51 | d7e9323b | Michele Tartara | import Ganeti.DataCollectors.InstStatusTypes |
52 | fc4be2bf | Michele Tartara | import Ganeti.DataCollectors.Types |
53 | d7e9323b | Michele Tartara | import Ganeti.Hypervisor.Xen |
54 | d4de2ea8 | Michele Tartara | import Ganeti.Hypervisor.Xen.Types |
55 | 17ae9cdb | Michele Tartara | import Ganeti.Logging |
56 | d7e9323b | Michele Tartara | import Ganeti.Objects |
57 | 17ae9cdb | Michele Tartara | import Ganeti.Path |
58 | 17ae9cdb | Michele Tartara | import Ganeti.Types |
59 | d7e9323b | Michele Tartara | import Ganeti.Utils |
60 | d7e9323b | Michele Tartara | |
61 | 7660aaf3 | Michele Tartara | |
62 | 7660aaf3 | Michele Tartara | -- | The name of this data collector. |
63 | 7660aaf3 | Michele Tartara | dcName :: String |
64 | 7660aaf3 | Michele Tartara | dcName = "inst-status-xen" |
65 | 7660aaf3 | Michele Tartara | |
66 | 7660aaf3 | Michele Tartara | -- | The version of this data collector. |
67 | 7660aaf3 | Michele Tartara | dcVersion :: DCVersion |
68 | 7660aaf3 | Michele Tartara | dcVersion = DCVerBuiltin |
69 | 7660aaf3 | Michele Tartara | |
70 | 7660aaf3 | Michele Tartara | -- | The version number for the data format of this data collector. |
71 | 7660aaf3 | Michele Tartara | dcFormatVersion :: Int |
72 | 7660aaf3 | Michele Tartara | dcFormatVersion = 1 |
73 | 7660aaf3 | Michele Tartara | |
74 | 7660aaf3 | Michele Tartara | -- | The category of this data collector. |
75 | 7660aaf3 | Michele Tartara | dcCategory :: Maybe DCCategory |
76 | 7660aaf3 | Michele Tartara | dcCategory = Just DCInstance |
77 | 7660aaf3 | Michele Tartara | |
78 | 7660aaf3 | Michele Tartara | -- | The kind of this data collector. |
79 | 7660aaf3 | Michele Tartara | dcKind :: DCKind |
80 | 7660aaf3 | Michele Tartara | dcKind = DCKStatus |
81 | 7660aaf3 | Michele Tartara | |
82 | e8b46463 | Michele Tartara | -- | The report of this data collector. |
83 | e8b46463 | Michele Tartara | dcReport :: IO DCReport |
84 | e8b46463 | Michele Tartara | dcReport = buildInstStatusReport Nothing Nothing |
85 | e8b46463 | Michele Tartara | |
86 | d7e9323b | Michele Tartara | -- * Command line options |
87 | d7e9323b | Michele Tartara | |
88 | d7e9323b | Michele Tartara | options :: IO [OptType] |
89 | d7e9323b | Michele Tartara | options = return |
90 | d7e9323b | Michele Tartara | [ oConfdAddr |
91 | d7e9323b | Michele Tartara | , oConfdPort |
92 | d7e9323b | Michele Tartara | ] |
93 | d7e9323b | Michele Tartara | |
94 | d7e9323b | Michele Tartara | -- | The list of arguments supported by the program. |
95 | d7e9323b | Michele Tartara | arguments :: [ArgCompletion] |
96 | d7e9323b | Michele Tartara | arguments = [] |
97 | d7e9323b | Michele Tartara | |
98 | d7e9323b | Michele Tartara | -- | Get the list of instances ([primary], [secondary]) on the given node. |
99 | d7e9323b | Michele Tartara | -- Implemented as a function, even if used a single time, to specify in a |
100 | d7e9323b | Michele Tartara | -- convenient and elegant way the return data type, required in order to |
101 | d7e9323b | Michele Tartara | -- prevent incurring in the monomorphism restriction. |
102 | d7e9323b | Michele Tartara | -- The server address and the server port parameters are mainly intended |
103 | d7e9323b | Michele Tartara | -- for testing purposes. If they are Nothing, the default values will be used. |
104 | d7e9323b | Michele Tartara | getInstances |
105 | d7e9323b | Michele Tartara | :: String |
106 | d7e9323b | Michele Tartara | -> Maybe String |
107 | d7e9323b | Michele Tartara | -> Maybe Int |
108 | d7e9323b | Michele Tartara | -> IO (BT.Result ([Ganeti.Objects.Instance], [Ganeti.Objects.Instance])) |
109 | d7e9323b | Michele Tartara | getInstances node srvAddr srvPort = do |
110 | d7e9323b | Michele Tartara | client <- getConfdClient srvAddr srvPort |
111 | d7e9323b | Michele Tartara | reply <- query client ReqNodeInstances $ PlainQuery node |
112 | d7e9323b | Michele Tartara | return $ |
113 | d7e9323b | Michele Tartara | case fmap (J.readJSON . confdReplyAnswer) reply of |
114 | d7e9323b | Michele Tartara | Just (J.Ok instances) -> BT.Ok instances |
115 | d7e9323b | Michele Tartara | Just (J.Error msg) -> BT.Bad msg |
116 | d7e9323b | Michele Tartara | Nothing -> BT.Bad "No answer from the Confd server" |
117 | d7e9323b | Michele Tartara | |
118 | 17ae9cdb | Michele Tartara | -- | Try to get the reason trail for an instance. In case it is not possible, |
119 | 17ae9cdb | Michele Tartara | -- log the failure and return an empty list instead. |
120 | 17ae9cdb | Michele Tartara | getReasonTrail :: String -> IO ReasonTrail |
121 | 17ae9cdb | Michele Tartara | getReasonTrail instanceName = do |
122 | 17ae9cdb | Michele Tartara | fileName <- getInstReasonFilename instanceName |
123 | 17ae9cdb | Michele Tartara | content <- try $ readFile fileName |
124 | 17ae9cdb | Michele Tartara | case content of |
125 | 17ae9cdb | Michele Tartara | Left e -> do |
126 | 17ae9cdb | Michele Tartara | logWarning $ |
127 | 17ae9cdb | Michele Tartara | "Unable to open the reason trail for instance " ++ instanceName ++ |
128 | 17ae9cdb | Michele Tartara | " expected at " ++ fileName ++ ": " ++ show (e :: IOException) |
129 | 17ae9cdb | Michele Tartara | return [] |
130 | 17ae9cdb | Michele Tartara | Right trailString -> |
131 | 17ae9cdb | Michele Tartara | case J.decode trailString of |
132 | 17ae9cdb | Michele Tartara | J.Ok t -> return t |
133 | 17ae9cdb | Michele Tartara | J.Error msg -> do |
134 | 17ae9cdb | Michele Tartara | logWarning $ "Unable to parse the reason trail: " ++ msg |
135 | 17ae9cdb | Michele Tartara | return [] |
136 | 17ae9cdb | Michele Tartara | |
137 | fc4be2bf | Michele Tartara | -- | Determine the value of the status field for the report of one instance |
138 | fc4be2bf | Michele Tartara | computeStatusField :: AdminState -> ActualState -> DCStatus |
139 | fc4be2bf | Michele Tartara | computeStatusField AdminDown actualState = |
140 | fc4be2bf | Michele Tartara | if actualState `notElem` [ActualShutdown, ActualDying] |
141 | fc4be2bf | Michele Tartara | then DCStatus DCSCBad "The instance is not stopped as it should be" |
142 | fc4be2bf | Michele Tartara | else DCStatus DCSCOk "" |
143 | fc4be2bf | Michele Tartara | computeStatusField AdminUp ActualHung = |
144 | fc4be2bf | Michele Tartara | DCStatus DCSCUnknown "Instance marked as running, but it appears to be hung" |
145 | fc4be2bf | Michele Tartara | computeStatusField AdminUp actualState = |
146 | fc4be2bf | Michele Tartara | if actualState `notElem` [ActualRunning, ActualBlocked] |
147 | fc4be2bf | Michele Tartara | then DCStatus DCSCBad "The instance is not running as it should be" |
148 | fc4be2bf | Michele Tartara | else DCStatus DCSCOk "" |
149 | fc4be2bf | Michele Tartara | computeStatusField AdminOffline _ = |
150 | fc4be2bf | Michele Tartara | -- FIXME: The "offline" status seems not to be used anywhere in the source |
151 | fc4be2bf | Michele Tartara | -- code, but it is defined, so we have to consider it anyway here. |
152 | fc4be2bf | Michele Tartara | DCStatus DCSCUnknown "The instance is marked as offline" |
153 | fc4be2bf | Michele Tartara | |
154 | d7e9323b | Michele Tartara | -- Builds the status of an instance using runtime information about the Xen |
155 | d7e9323b | Michele Tartara | -- Domains, their uptime information and the static information provided by |
156 | d7e9323b | Michele Tartara | -- the ConfD server. |
157 | d7e9323b | Michele Tartara | buildStatus :: Map.Map String Domain -> Map.Map Int UptimeInfo -> Instance |
158 | d7e9323b | Michele Tartara | -> IO InstStatus |
159 | d7e9323b | Michele Tartara | buildStatus domains uptimes inst = do |
160 | d7e9323b | Michele Tartara | let name = instName inst |
161 | d7e9323b | Michele Tartara | currDomain = Map.lookup name domains |
162 | d7e9323b | Michele Tartara | idNum = fmap domId currDomain |
163 | d7e9323b | Michele Tartara | currUInfo = idNum >>= (`Map.lookup` uptimes) |
164 | d7e9323b | Michele Tartara | uptime = fmap uInfoUptime currUInfo |
165 | d7e9323b | Michele Tartara | adminState = instAdminState inst |
166 | d4de2ea8 | Michele Tartara | actualState = |
167 | d4de2ea8 | Michele Tartara | if adminState == AdminDown && isNothing currDomain |
168 | d4de2ea8 | Michele Tartara | then ActualShutdown |
169 | d4de2ea8 | Michele Tartara | else case currDomain of |
170 | d4de2ea8 | Michele Tartara | (Just dom@(Domain _ _ _ _ (Just isHung))) -> |
171 | d4de2ea8 | Michele Tartara | if isHung |
172 | d4de2ea8 | Michele Tartara | then ActualHung |
173 | d4de2ea8 | Michele Tartara | else domState dom |
174 | d4de2ea8 | Michele Tartara | _ -> ActualUnknown |
175 | fc4be2bf | Michele Tartara | status = computeStatusField adminState actualState |
176 | 17ae9cdb | Michele Tartara | trail <- getReasonTrail name |
177 | d7e9323b | Michele Tartara | return $ |
178 | d7e9323b | Michele Tartara | InstStatus |
179 | d7e9323b | Michele Tartara | name |
180 | d7e9323b | Michele Tartara | (instUuid inst) |
181 | d7e9323b | Michele Tartara | adminState |
182 | d4de2ea8 | Michele Tartara | actualState |
183 | d7e9323b | Michele Tartara | uptime |
184 | d7e9323b | Michele Tartara | (instMtime inst) |
185 | 17ae9cdb | Michele Tartara | trail |
186 | fc4be2bf | Michele Tartara | status |
187 | d7e9323b | Michele Tartara | |
188 | 79731e21 | Michele Tartara | -- | Compute the status code and message, given the current DRBD data |
189 | 79731e21 | Michele Tartara | -- The final state will have the code corresponding to the worst code of |
190 | 79731e21 | Michele Tartara | -- all the devices, and the error message given from the concatenation of the |
191 | 79731e21 | Michele Tartara | -- non-empty error messages. |
192 | 79731e21 | Michele Tartara | computeGlobalStatus :: [InstStatus] -> DCStatus |
193 | 79731e21 | Michele Tartara | computeGlobalStatus instStatusList = |
194 | 79731e21 | Michele Tartara | let dcstatuses = map iStatStatus instStatusList |
195 | 79731e21 | Michele Tartara | statuses = map (\s -> (dcStatusCode s, dcStatusMessage s)) dcstatuses |
196 | 79731e21 | Michele Tartara | (code, strList) = foldr mergeStatuses (DCSCOk, [""]) statuses |
197 | 79731e21 | Michele Tartara | in DCStatus code $ intercalate "\n" strList |
198 | 79731e21 | Michele Tartara | |
199 | 4fe04580 | Michele Tartara | -- | Build the report of this data collector, containing all the information |
200 | 4fe04580 | Michele Tartara | -- about the status of the instances. |
201 | 4fe04580 | Michele Tartara | buildInstStatusReport :: Maybe String -> Maybe Int -> IO DCReport |
202 | 4fe04580 | Michele Tartara | buildInstStatusReport srvAddr srvPort = do |
203 | 4fe04580 | Michele Tartara | node <- getHostName |
204 | 4fe04580 | Michele Tartara | answer <- getInstances node srvAddr srvPort |
205 | d7e9323b | Michele Tartara | inst <- exitIfBad "Can't get instance info from ConfD" answer |
206 | d7e9323b | Michele Tartara | domains <- getInferredDomInfo |
207 | d7e9323b | Michele Tartara | uptimes <- getUptimeInfo |
208 | d7e9323b | Michele Tartara | let primaryInst = fst inst |
209 | d7e9323b | Michele Tartara | iStatus <- mapM (buildStatus domains uptimes) primaryInst |
210 | 79731e21 | Michele Tartara | let globalStatus = computeGlobalStatus iStatus |
211 | 79731e21 | Michele Tartara | jsonReport = J.showJSON $ ReportData iStatus globalStatus |
212 | 4fe04580 | Michele Tartara | buildReport dcName dcVersion dcFormatVersion dcCategory dcKind jsonReport |
213 | 4fe04580 | Michele Tartara | |
214 | 4fe04580 | Michele Tartara | -- | Main function. |
215 | 4fe04580 | Michele Tartara | main :: Options -> [String] -> IO () |
216 | 4fe04580 | Michele Tartara | main opts _ = do |
217 | 4fe04580 | Michele Tartara | report <- buildInstStatusReport (optConfdAddr opts) (optConfdPort opts) |
218 | 4fe04580 | Michele Tartara | putStrLn $ J.encode report |