-
Notifications
You must be signed in to change notification settings - Fork 168
/
analysis_dao.go
502 lines (475 loc) · 24.3 KB
/
analysis_dao.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
/*
Copyright 2015 Shlomi Noach, courtesy Booking.com
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package inst
import (
"fmt"
"github.com/outbrain/golib/log"
"github.com/outbrain/golib/sqlutils"
"github.com/outbrain/orchestrator/go/config"
"github.com/outbrain/orchestrator/go/db"
"github.com/pmylund/go-cache"
"github.com/rcrowley/go-metrics"
"regexp"
"time"
)
var analysisChangeWriteAttemptCounter = metrics.NewCounter()
var analysisChangeWriteCounter = metrics.NewCounter()
func init() {
metrics.Register("analysis.change.write.attempt", analysisChangeWriteAttemptCounter)
metrics.Register("analysis.change.write", analysisChangeWriteCounter)
}
var recentInstantAnalysis = cache.New(time.Duration(config.Config.RecoveryPollSeconds*2)*time.Second, time.Second)
// GetReplicationAnalysis will check for replication problems (dead master; unreachable master; etc)
func GetReplicationAnalysis(clusterName string, includeDowntimed bool, auditAnalysis bool) ([]ReplicationAnalysis, error) {
result := []ReplicationAnalysis{}
args := sqlutils.Args(config.Config.InstancePollSeconds, clusterName)
analysisQueryReductionClause := ``
if config.Config.ReduceReplicationAnalysisCount {
analysisQueryReductionClause = `
HAVING
(MIN(
master_instance.last_checked <= master_instance.last_seen
AND master_instance.last_attempted_check <= master_instance.last_seen + INTERVAL (2 * ?) SECOND
) IS TRUE /* AS is_last_check_valid */) = 0
OR (IFNULL(SUM(slave_instance.last_checked <= slave_instance.last_seen
AND slave_instance.slave_io_running = 0
AND slave_instance.last_io_error RLIKE 'error (connecting|reconnecting) to master'
AND slave_instance.slave_sql_running = 1),
0) /* AS count_slaves_failing_to_connect_to_master */ > 0)
OR (IFNULL(SUM(slave_instance.last_checked <= slave_instance.last_seen),
0) /* AS count_valid_slaves */ < COUNT(slave_instance.server_id) /* AS count_slaves */)
OR (IFNULL(SUM(slave_instance.last_checked <= slave_instance.last_seen
AND slave_instance.slave_io_running != 0
AND slave_instance.slave_sql_running != 0),
0) /* AS count_valid_replicating_slaves */ < COUNT(slave_instance.server_id) /* AS count_slaves */)
OR (MIN(
master_instance.slave_sql_running = 1
AND master_instance.slave_io_running = 0
AND master_instance.last_io_error RLIKE 'error (connecting|reconnecting) to master'
) /* AS is_failing_to_connect_to_master */)
OR (COUNT(slave_instance.server_id) /* AS count_slaves */ > 0)
`
args = append(args, config.Config.InstancePollSeconds)
}
// "OR count_slaves > 0" above is a recent addition, which, granted, makes some previous conditions redundant.
// It gives more output, and more "NoProblem" messages that I am now interested in for purpose of auditing in database_instance_analysis_changelog
query := fmt.Sprintf(`
SELECT
master_instance.hostname,
master_instance.port,
MIN(master_instance.master_host) AS master_host,
MIN(master_instance.master_port) AS master_port,
MIN(master_instance.cluster_name) AS cluster_name,
MIN(IFNULL(cluster_alias.alias, master_instance.cluster_name)) AS cluster_alias,
MIN(
master_instance.last_checked <= master_instance.last_seen
AND master_instance.last_attempted_check <= master_instance.last_seen + INTERVAL (2 * ?) SECOND
) IS TRUE AS is_last_check_valid,
MIN(master_instance.master_host IN ('' , '_')
OR master_instance.master_port = 0
OR left(master_instance.master_host, 2) = '//') AS is_master,
MIN(master_instance.is_co_master) AS is_co_master,
MIN(CONCAT(master_instance.hostname,
':',
master_instance.port) = master_instance.cluster_name) AS is_cluster_master,
COUNT(slave_instance.server_id) AS count_slaves,
IFNULL(SUM(slave_instance.last_checked <= slave_instance.last_seen),
0) AS count_valid_slaves,
IFNULL(SUM(slave_instance.last_checked <= slave_instance.last_seen
AND slave_instance.slave_io_running != 0
AND slave_instance.slave_sql_running != 0),
0) AS count_valid_replicating_slaves,
IFNULL(SUM(slave_instance.last_checked <= slave_instance.last_seen
AND slave_instance.slave_io_running = 0
AND slave_instance.last_io_error RLIKE 'error (connecting|reconnecting) to master'
AND slave_instance.slave_sql_running = 1),
0) AS count_slaves_failing_to_connect_to_master,
IFNULL(SUM(
current_relay_log_file=prev_relay_log_file
and current_relay_log_pos=prev_relay_log_pos
and current_seen != prev_seen),
0) AS count_stale_slaves,
MIN(master_instance.replication_depth) AS replication_depth,
GROUP_CONCAT(slave_instance.Hostname, ':', slave_instance.Port) as slave_hosts,
MIN(
master_instance.slave_sql_running = 1
AND master_instance.slave_io_running = 0
AND master_instance.last_io_error RLIKE 'error (connecting|reconnecting) to master'
) AS is_failing_to_connect_to_master,
MIN(
database_instance_downtime.downtime_active IS NULL
OR database_instance_downtime.end_timestamp < NOW()
) IS FALSE AS is_downtimed,
MIN(
IFNULL(database_instance_downtime.end_timestamp, '')
) AS downtime_end_timestamp,
MIN(
IFNULL(TIMESTAMPDIFF(SECOND, NOW(), database_instance_downtime.end_timestamp), 0)
) AS downtime_remaining_seconds,
MIN(
master_instance.binlog_server
) AS is_binlog_server,
MIN(
master_instance.pseudo_gtid
) AS is_pseudo_gtid,
MIN(
master_instance.supports_oracle_gtid
) AS supports_oracle_gtid,
SUM(
slave_instance.oracle_gtid
) AS count_oracle_gtid_slaves,
IFNULL(SUM(slave_instance.last_checked <= slave_instance.last_seen
AND slave_instance.oracle_gtid != 0),
0) AS count_valid_oracle_gtid_slaves,
SUM(
slave_instance.binlog_server
) AS count_binlog_server_slaves,
IFNULL(SUM(slave_instance.last_checked <= slave_instance.last_seen
AND slave_instance.binlog_server != 0),
0) AS count_valid_binlog_server_slaves,
MIN(
master_instance.mariadb_gtid
) AS is_mariadb_gtid,
SUM(
slave_instance.mariadb_gtid
) AS count_mariadb_gtid_slaves,
IFNULL(SUM(slave_instance.last_checked <= slave_instance.last_seen
AND slave_instance.mariadb_gtid != 0),
0) AS count_valid_mariadb_gtid_slaves,
IFNULL(SUM(slave_instance.log_bin
AND slave_instance.log_slave_updates
AND slave_instance.binlog_format = 'STATEMENT'),
0) AS count_statement_based_loggin_slaves,
IFNULL(SUM(slave_instance.log_bin
AND slave_instance.log_slave_updates
AND slave_instance.binlog_format = 'MIXED'),
0) AS count_mixed_based_loggin_slaves,
IFNULL(SUM(slave_instance.log_bin
AND slave_instance.log_slave_updates
AND slave_instance.binlog_format = 'ROW'),
0) AS count_row_based_loggin_slaves,
COUNT(DISTINCT IF(
slave_instance.log_bin AND slave_instance.log_slave_updates,
substring_index(slave_instance.version, '.', 2),
NULL)
) AS count_distinct_logging_major_versions
FROM
database_instance master_instance
LEFT JOIN
hostname_resolve ON (master_instance.hostname = hostname_resolve.hostname)
LEFT JOIN
database_instance slave_instance ON (COALESCE(hostname_resolve.resolved_hostname,
master_instance.hostname) = slave_instance.master_host
AND master_instance.port = slave_instance.master_port)
LEFT JOIN
database_instance_maintenance ON (master_instance.hostname = database_instance_maintenance.hostname
AND master_instance.port = database_instance_maintenance.port
AND database_instance_maintenance.maintenance_active = 1)
LEFT JOIN
database_instance_downtime ON (master_instance.hostname = database_instance_downtime.hostname
AND master_instance.port = database_instance_downtime.port
AND database_instance_downtime.downtime_active = 1)
LEFT JOIN
cluster_alias ON (cluster_alias.cluster_name = master_instance.cluster_name)
LEFT JOIN
database_instance_recent_relaylog_history ON (
slave_instance.hostname = database_instance_recent_relaylog_history.hostname
AND slave_instance.port = database_instance_recent_relaylog_history.port)
WHERE
database_instance_maintenance.database_instance_maintenance_id IS NULL
AND ? IN ('', master_instance.cluster_name)
GROUP BY
master_instance.hostname,
master_instance.port
%s
ORDER BY
is_master DESC ,
is_cluster_master DESC,
count_slaves DESC
`, analysisQueryReductionClause)
err := db.QueryOrchestrator(query, args, func(m sqlutils.RowMap) error {
a := ReplicationAnalysis{Analysis: NoProblem}
a.IsMaster = m.GetBool("is_master")
a.IsCoMaster = m.GetBool("is_co_master")
a.AnalyzedInstanceKey = InstanceKey{Hostname: m.GetString("hostname"), Port: m.GetInt("port")}
a.AnalyzedInstanceMasterKey = InstanceKey{Hostname: m.GetString("master_host"), Port: m.GetInt("master_port")}
a.ClusterDetails.ClusterName = m.GetString("cluster_name")
a.ClusterDetails.ClusterAlias = m.GetString("cluster_alias")
a.LastCheckValid = m.GetBool("is_last_check_valid")
a.CountSlaves = m.GetUint("count_slaves")
a.CountValidSlaves = m.GetUint("count_valid_slaves")
a.CountValidReplicatingSlaves = m.GetUint("count_valid_replicating_slaves")
a.CountSlavesFailingToConnectToMaster = m.GetUint("count_slaves_failing_to_connect_to_master")
a.CountStaleSlaves = m.GetUint("count_stale_slaves")
a.ReplicationDepth = m.GetUint("replication_depth")
a.IsFailingToConnectToMaster = m.GetBool("is_failing_to_connect_to_master")
a.IsDowntimed = m.GetBool("is_downtimed")
a.DowntimeEndTimestamp = m.GetString("downtime_end_timestamp")
a.DowntimeRemainingSeconds = m.GetInt("downtime_remaining_seconds")
a.IsBinlogServer = m.GetBool("is_binlog_server")
a.ClusterDetails.ReadRecoveryInfo()
a.SlaveHosts = *NewInstanceKeyMap()
a.SlaveHosts.ReadCommaDelimitedList(m.GetString("slave_hosts"))
countValidOracleGTIDSlaves := m.GetUint("count_valid_oracle_gtid_slaves")
a.OracleGTIDImmediateTopology = countValidOracleGTIDSlaves == a.CountValidSlaves && a.CountValidSlaves > 0
countValidMariaDBGTIDSlaves := m.GetUint("count_valid_mariadb_gtid_slaves")
a.MariaDBGTIDImmediateTopology = countValidMariaDBGTIDSlaves == a.CountValidSlaves && a.CountValidSlaves > 0
countValidBinlogServerSlaves := m.GetUint("count_valid_binlog_server_slaves")
a.BinlogServerImmediateTopology = countValidBinlogServerSlaves == a.CountValidSlaves && a.CountValidSlaves > 0
a.PseudoGTIDImmediateTopology = m.GetBool("is_pseudo_gtid")
a.CountStatementBasedLoggingSlaves = m.GetUint("count_statement_based_loggin_slaves")
a.CountMixedBasedLoggingSlaves = m.GetUint("count_mixed_based_loggin_slaves")
a.CountRowBasedLoggingSlaves = m.GetUint("count_row_based_loggin_slaves")
a.CountDistinctMajorVersionsLoggingSlaves = m.GetUint("count_distinct_logging_major_versions")
if a.IsMaster && !a.LastCheckValid && a.CountSlaves == 0 {
a.Analysis = DeadMasterWithoutSlaves
a.Description = "Master cannot be reached by orchestrator and has no slave"
//
} else if a.IsMaster && !a.LastCheckValid && a.CountValidSlaves == a.CountSlaves && a.CountValidReplicatingSlaves == 0 {
a.Analysis = DeadMaster
a.Description = "Master cannot be reached by orchestrator and none of its slaves is replicating"
//
} else if a.IsMaster && !a.LastCheckValid && a.CountSlaves > 0 && a.CountValidSlaves == 0 && a.CountValidReplicatingSlaves == 0 {
a.Analysis = DeadMasterAndSlaves
a.Description = "Master cannot be reached by orchestrator and none of its slaves is replicating"
//
} else if a.IsMaster && !a.LastCheckValid && a.CountValidSlaves < a.CountSlaves && a.CountValidSlaves > 0 && a.CountValidReplicatingSlaves == 0 {
a.Analysis = DeadMasterAndSomeSlaves
a.Description = "Master cannot be reached by orchestrator; some of its slaves are unreachable and none of its reachable slaves is replicating"
//
} else if a.IsMaster && !a.LastCheckValid && a.CountStaleSlaves == a.CountSlaves && a.CountValidReplicatingSlaves > 0 {
a.Analysis = UnreachableMasterWithStaleSlaves
a.Description = "Master cannot be reached by orchestrator and has running yet stale slaves"
//
} else if a.IsMaster && !a.LastCheckValid && a.CountValidSlaves > 0 && a.CountValidReplicatingSlaves > 0 {
a.Analysis = UnreachableMaster
a.Description = "Master cannot be reached by orchestrator but it has replicating slaves; possibly a network/host issue"
//
} else if a.IsMaster && a.LastCheckValid && a.CountSlaves == 1 && a.CountValidSlaves == a.CountSlaves && a.CountValidReplicatingSlaves == 0 {
a.Analysis = MasterSingleSlaveNotReplicating
a.Description = "Master is reachable but its single slave is not replicating"
//
} else if a.IsMaster && a.LastCheckValid && a.CountSlaves == 1 && a.CountValidSlaves == 0 {
a.Analysis = MasterSingleSlaveDead
a.Description = "Master is reachable but its single slave is dead"
//
} else if a.IsMaster && a.LastCheckValid && a.CountSlaves > 1 && a.CountValidSlaves == a.CountSlaves && a.CountValidReplicatingSlaves == 0 {
a.Analysis = AllMasterSlavesNotReplicating
a.Description = "Master is reachable but none of its slaves is replicating"
//
} else if a.IsMaster && a.LastCheckValid && a.CountSlaves > 1 && a.CountValidSlaves < a.CountSlaves && a.CountValidSlaves > 0 && a.CountValidReplicatingSlaves == 0 {
a.Analysis = AllMasterSlavesNotReplicatingOrDead
a.Description = "Master is reachable but none of its slaves is replicating"
//
} else if a.IsMaster && a.LastCheckValid && a.CountSlaves > 1 && a.CountStaleSlaves == a.CountSlaves && a.CountValidSlaves > 0 && a.CountValidReplicatingSlaves > 0 {
a.Analysis = AllMasterSlavesStale
a.Description = "Master is reachable but all of its slaves are stale, although attempting to replicate"
//
} else /* co-master */ if a.IsCoMaster && !a.LastCheckValid && a.CountSlaves > 0 && a.CountValidSlaves == a.CountSlaves && a.CountValidReplicatingSlaves == 0 {
a.Analysis = DeadCoMaster
a.Description = "Co-master cannot be reached by orchestrator and none of its slaves is replicating"
//
} else if a.IsCoMaster && !a.LastCheckValid && a.CountSlaves > 0 && a.CountValidSlaves < a.CountSlaves && a.CountValidSlaves > 0 && a.CountValidReplicatingSlaves == 0 {
a.Analysis = DeadCoMasterAndSomeSlaves
a.Description = "Co-master cannot be reached by orchestrator; some of its slaves are unreachable and none of its reachable slaves is replicating"
//
} else if a.IsCoMaster && !a.LastCheckValid && a.CountValidSlaves > 0 && a.CountValidReplicatingSlaves > 0 {
a.Analysis = UnreachableCoMaster
a.Description = "Co-master cannot be reached by orchestrator but it has replicating slaves; possibly a network/host issue"
//
} else if a.IsCoMaster && a.LastCheckValid && a.CountSlaves > 0 && a.CountValidReplicatingSlaves == 0 {
a.Analysis = AllCoMasterSlavesNotReplicating
a.Description = "Co-master is reachable but none of its slaves is replicating"
//
} else /* intermediate-master */ if !a.IsMaster && !a.LastCheckValid && a.CountSlaves == 1 && a.CountValidSlaves == a.CountSlaves && a.CountSlavesFailingToConnectToMaster == a.CountSlaves && a.CountValidReplicatingSlaves == 0 {
a.Analysis = DeadIntermediateMasterWithSingleSlaveFailingToConnect
a.Description = "Intermediate master cannot be reached by orchestrator and its (single) slave is failing to connect"
//
} else /* intermediate-master */ if !a.IsMaster && !a.LastCheckValid && a.CountSlaves == 1 && a.CountValidSlaves == a.CountSlaves && a.CountValidReplicatingSlaves == 0 {
a.Analysis = DeadIntermediateMasterWithSingleSlave
a.Description = "Intermediate master cannot be reached by orchestrator and its (single) slave is not replicating"
//
} else /* intermediate-master */ if !a.IsMaster && !a.LastCheckValid && a.CountSlaves > 1 && a.CountValidSlaves == a.CountSlaves && a.CountValidReplicatingSlaves == 0 {
a.Analysis = DeadIntermediateMaster
a.Description = "Intermediate master cannot be reached by orchestrator and none of its slaves is replicating"
//
} else if !a.IsMaster && !a.LastCheckValid && a.CountValidSlaves < a.CountSlaves && a.CountValidSlaves > 0 && a.CountValidReplicatingSlaves == 0 {
a.Analysis = DeadIntermediateMasterAndSomeSlaves
a.Description = "Intermediate master cannot be reached by orchestrator; some of its slaves are unreachable and none of its reachable slaves is replicating"
//
} else if !a.IsMaster && !a.LastCheckValid && a.CountValidSlaves > 0 && a.CountValidReplicatingSlaves > 0 {
a.Analysis = UnreachableIntermediateMaster
a.Description = "Intermediate master cannot be reached by orchestrator but it has replicating slaves; possibly a network/host issue"
//
} else if !a.IsMaster && a.LastCheckValid && a.CountSlaves > 1 && a.CountValidReplicatingSlaves == 0 &&
a.CountSlavesFailingToConnectToMaster > 0 && a.CountSlavesFailingToConnectToMaster == a.CountValidSlaves {
// All slaves are either failing to connect to master (and at least one of these have to exist)
// or completely dead.
// Must have at least two slaves to reach such conclusion -- do note that the intermediate master is still
// reachable to orchestrator, so we base our conclusion on slaves only at this point.
a.Analysis = AllIntermediateMasterSlavesFailingToConnectOrDead
a.Description = "Intermediate master is reachable but all of its slaves are failing to connect"
//
} else if !a.IsMaster && a.LastCheckValid && a.CountSlaves > 0 && a.CountValidReplicatingSlaves == 0 {
a.Analysis = AllIntermediateMasterSlavesNotReplicating
a.Description = "Intermediate master is reachable but none of its slaves is replicating"
//
} else if a.IsBinlogServer && a.IsFailingToConnectToMaster {
a.Analysis = BinlogServerFailingToConnectToMaster
a.Description = "Binlog server is unable to connect to its master"
//
} else if a.ReplicationDepth == 1 && a.IsFailingToConnectToMaster {
a.Analysis = FirstTierSlaveFailingToConnectToMaster
a.Description = "1st tier slave (directly replicating from topology master) is unable to connect to the master"
//
}
// else if a.IsMaster && a.CountSlaves == 0 {
// a.Analysis = MasterWithoutSlaves
// a.Description = "Master has no slaves"
// }
appendAnalysis := func(analysis *ReplicationAnalysis) {
if a.Analysis == NoProblem && len(a.StructureAnalysis) == 0 {
return
}
skipThisHost := false
for _, filter := range config.Config.RecoveryIgnoreHostnameFilters {
if matched, _ := regexp.MatchString(filter, a.AnalyzedInstanceKey.Hostname); matched {
skipThisHost = true
}
}
if a.IsDowntimed && !includeDowntimed {
skipThisHost = true
}
if !skipThisHost {
result = append(result, a)
}
}
{
// Moving on to structure analysis
// We also do structural checks. See if there's potential danger in promotions
if a.IsMaster && a.CountStatementBasedLoggingSlaves > 0 && a.CountMixedBasedLoggingSlaves > 0 {
a.StructureAnalysis = append(a.StructureAnalysis, StatementAndMixedLoggingSlavesStructureWarning)
}
if a.IsMaster && a.CountStatementBasedLoggingSlaves > 0 && a.CountRowBasedLoggingSlaves > 0 {
a.StructureAnalysis = append(a.StructureAnalysis, StatementAndRowLoggingSlavesStructureWarning)
}
if a.IsMaster && a.CountMixedBasedLoggingSlaves > 0 && a.CountRowBasedLoggingSlaves > 0 {
a.StructureAnalysis = append(a.StructureAnalysis, MixedAndRowLoggingSlavesStructureWarning)
}
if a.IsMaster && a.CountDistinctMajorVersionsLoggingSlaves > 1 {
a.StructureAnalysis = append(a.StructureAnalysis, MultipleMajorVersionsLoggingSlaves)
}
}
appendAnalysis(&a)
if a.CountSlaves > 0 && auditAnalysis {
// Interesting enough for analysis
go auditInstanceAnalysisInChangelog(&a.AnalyzedInstanceKey, a.Analysis)
}
return nil
})
if err != nil {
log.Errore(err)
}
return result, err
}
// auditInstanceAnalysisInChangelog will write down an instance's analysis in the database_instance_analysis_changelog table.
// To not repeat recurring analysis code, the database_instance_last_analysis table is used, so that only changes to
// analysis codes are written.
func auditInstanceAnalysisInChangelog(instanceKey *InstanceKey, analysisCode AnalysisCode) error {
if lastWrittenAnalysis, found := recentInstantAnalysis.Get(instanceKey.DisplayString()); found {
if lastWrittenAnalysis == analysisCode {
// Surely nothing new.
// And let's expand the timeout
recentInstantAnalysis.Set(instanceKey.DisplayString(), analysisCode, cache.DefaultExpiration)
return nil
}
}
// Passed the cache; but does database agree that there's a change? Here's a persistent cache; this comes here
// to verify no two orchestrator services are doing this without coordinating (namely, one dies, the other taking its place
// and has no familiarity of the former's cache)
analysisChangeWriteAttemptCounter.Inc(1)
sqlResult, err := db.ExecOrchestrator(`
insert ignore into database_instance_last_analysis (
hostname, port, analysis_timestamp, analysis
) values (
?, ?, now(), ?
) on duplicate key update
analysis = values(analysis),
analysis_timestamp = if(analysis = values(analysis), analysis_timestamp, values(analysis_timestamp))
`,
instanceKey.Hostname, instanceKey.Port, string(analysisCode),
)
if err != nil {
return log.Errore(err)
}
rows, err := sqlResult.RowsAffected()
if err != nil {
return log.Errore(err)
}
recentInstantAnalysis.Set(instanceKey.DisplayString(), analysisCode, cache.DefaultExpiration)
lastAnalysisChanged := (rows > 0)
if !lastAnalysisChanged {
return nil
}
_, err = db.ExecOrchestrator(`
insert into database_instance_analysis_changelog (
hostname, port, analysis_timestamp, analysis
) values (
?, ?, now(), ?
)
`,
instanceKey.Hostname, instanceKey.Port, string(analysisCode),
)
if err == nil {
analysisChangeWriteCounter.Inc(1)
}
return log.Errore(err)
}
// ExpireInstanceAnalysisChangelog removes old-enough analysis entries from the changelog
func ExpireInstanceAnalysisChangelog() error {
_, err := db.ExecOrchestrator(`
delete
from database_instance_analysis_changelog
where
analysis_timestamp < now() - interval ? hour
`,
config.Config.UnseenInstanceForgetHours,
)
return log.Errore(err)
}
// ReadReplicationAnalysisChangelog
func ReadReplicationAnalysisChangelog() ([]ReplicationAnalysisChangelog, error) {
res := []ReplicationAnalysisChangelog{}
query := `
select
hostname,
port,
group_concat(analysis_timestamp,';',analysis order by changelog_id) as changelog
from
database_instance_analysis_changelog
group by
hostname, port
`
err := db.QueryOrchestratorRowsMap(query, func(m sqlutils.RowMap) error {
analysisChangelog := ReplicationAnalysisChangelog{}
analysisChangelog.AnalyzedInstanceKey.Hostname = m.GetString("hostname")
analysisChangelog.AnalyzedInstanceKey.Port = m.GetInt("port")
analysisChangelog.Changelog = m.GetString("changelog")
res = append(res, analysisChangelog)
return nil
})
if err != nil {
log.Errore(err)
}
return res, err
}