forked from vitessio/vitess
-
Notifications
You must be signed in to change notification settings - Fork 0
/
version.go
189 lines (165 loc) · 5.12 KB
/
version.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
// Copyright 2013, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package wrangler
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"sort"
"sync"
log "github.com/golang/glog"
"github.com/youtube/vitess/go/vt/concurrency"
"github.com/youtube/vitess/go/vt/topo/topoproto"
"golang.org/x/net/context"
pb "github.com/youtube/vitess/go/vt/proto/topodata"
)
var getVersionFromTabletDebugVars = func(tabletAddr string) (string, error) {
resp, err := http.Get("http://" + tabletAddr + "/debug/vars")
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
var vars struct {
BuildHost string
BuildUser string
BuildTimestamp int64
BuildGitRev string
}
err = json.Unmarshal(body, &vars)
if err != nil {
return "", err
}
version := fmt.Sprintf("%v", vars)
return version, nil
}
var getVersionFromTablet = getVersionFromTabletDebugVars
// ResetDebugVarsGetVersion is used by tests to reset the
// getVersionFromTablet variable to the default one. That way we can
// run the unit tests in testlib/ even when another implementation of
// getVersionFromTablet is used.
func ResetDebugVarsGetVersion() {
getVersionFromTablet = getVersionFromTabletDebugVars
}
// GetVersion returns the version string from a tablet
func (wr *Wrangler) GetVersion(ctx context.Context, tabletAlias *pb.TabletAlias) (string, error) {
tablet, err := wr.ts.GetTablet(ctx, tabletAlias)
if err != nil {
return "", err
}
version, err := getVersionFromTablet(tablet.Addr())
if err != nil {
return "", err
}
log.Infof("Tablet %v is running version '%v'", topoproto.TabletAliasString(tabletAlias), version)
return version, err
}
// helper method to asynchronously get and diff a version
func (wr *Wrangler) diffVersion(ctx context.Context, masterVersion string, masterAlias *pb.TabletAlias, alias *pb.TabletAlias, wg *sync.WaitGroup, er concurrency.ErrorRecorder) {
defer wg.Done()
log.Infof("Gathering version for %v", topoproto.TabletAliasString(alias))
slaveVersion, err := wr.GetVersion(ctx, alias)
if err != nil {
er.RecordError(err)
return
}
if masterVersion != slaveVersion {
er.RecordError(fmt.Errorf("Master %v version %v is different than slave %v version %v", topoproto.TabletAliasString(masterAlias), masterVersion, topoproto.TabletAliasString(alias), slaveVersion))
}
}
// ValidateVersionShard validates all versions are the same in all
// tablets in a shard
func (wr *Wrangler) ValidateVersionShard(ctx context.Context, keyspace, shard string) error {
si, err := wr.ts.GetShard(ctx, keyspace, shard)
if err != nil {
return err
}
// get version from the master, or error
if !si.HasMaster() {
return fmt.Errorf("No master in shard %v/%v", keyspace, shard)
}
log.Infof("Gathering version for master %v", topoproto.TabletAliasString(si.MasterAlias))
masterVersion, err := wr.GetVersion(ctx, si.MasterAlias)
if err != nil {
return err
}
// read all the aliases in the shard, that is all tablets that are
// replicating from the master
aliases, err := wr.ts.FindAllTabletAliasesInShard(ctx, keyspace, shard)
if err != nil {
return err
}
// then diff with all slaves
er := concurrency.AllErrorRecorder{}
wg := sync.WaitGroup{}
for _, alias := range aliases {
if topoproto.TabletAliasEqual(alias, si.MasterAlias) {
continue
}
wg.Add(1)
go wr.diffVersion(ctx, masterVersion, si.MasterAlias, alias, &wg, &er)
}
wg.Wait()
if er.HasErrors() {
return fmt.Errorf("Version diffs:\n%v", er.Error().Error())
}
return nil
}
// ValidateVersionKeyspace validates all versions are the same in all
// tablets in a keyspace
func (wr *Wrangler) ValidateVersionKeyspace(ctx context.Context, keyspace string) error {
// find all the shards
shards, err := wr.ts.GetShardNames(ctx, keyspace)
if err != nil {
return err
}
// corner cases
if len(shards) == 0 {
return fmt.Errorf("No shards in keyspace %v", keyspace)
}
sort.Strings(shards)
if len(shards) == 1 {
return wr.ValidateVersionShard(ctx, keyspace, shards[0])
}
// find the reference version using the first shard's master
si, err := wr.ts.GetShard(ctx, keyspace, shards[0])
if err != nil {
return err
}
if !si.HasMaster() {
return fmt.Errorf("No master in shard %v/%v", keyspace, shards[0])
}
referenceAlias := si.MasterAlias
log.Infof("Gathering version for reference master %v", topoproto.TabletAliasString(referenceAlias))
referenceVersion, err := wr.GetVersion(ctx, referenceAlias)
if err != nil {
return err
}
// then diff with all tablets but master 0
er := concurrency.AllErrorRecorder{}
wg := sync.WaitGroup{}
for _, shard := range shards {
aliases, err := wr.ts.FindAllTabletAliasesInShard(ctx, keyspace, shard)
if err != nil {
er.RecordError(err)
continue
}
for _, alias := range aliases {
if topoproto.TabletAliasEqual(alias, si.MasterAlias) {
continue
}
wg.Add(1)
go wr.diffVersion(ctx, referenceVersion, referenceAlias, alias, &wg, &er)
}
}
wg.Wait()
if er.HasErrors() {
return fmt.Errorf("Version diffs:\n%v", er.Error().Error())
}
return nil
}