-
Notifications
You must be signed in to change notification settings - Fork 2.1k
/
keyspace.go
264 lines (238 loc) · 8.35 KB
/
keyspace.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
/*
Copyright 2019 The Vitess Authors.
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 wrangler
import (
"bytes"
"context"
"fmt"
"strings"
"sync"
"time"
"vitess.io/vitess/go/vt/proto/binlogdata"
"vitess.io/vitess/go/sqltypes"
"vitess.io/vitess/go/vt/concurrency"
topodatapb "vitess.io/vitess/go/vt/proto/topodata"
"vitess.io/vitess/go/vt/topo"
"vitess.io/vitess/go/vt/topo/topoproto"
"vitess.io/vitess/go/vt/topotools"
"vitess.io/vitess/go/vt/vterrors"
)
const (
// DefaultFilteredReplicationWaitTime is the default value for argument filteredReplicationWaitTime.
DefaultFilteredReplicationWaitTime = 30 * time.Second
)
// keyspace related methods for Wrangler
// validateNewWorkflow ensures that the specified workflow doesn't already exist
// in the keyspace.
func (wr *Wrangler) validateNewWorkflow(ctx context.Context, keyspace, workflow string) error {
allshards, err := wr.ts.FindAllShardsInKeyspace(ctx, keyspace)
if err != nil {
return err
}
var wg sync.WaitGroup
allErrors := &concurrency.AllErrorRecorder{}
for _, si := range allshards {
if si.PrimaryAlias == nil {
allErrors.RecordError(fmt.Errorf("shard has no primary: %v", si.ShardName()))
continue
}
wg.Add(1)
go func(si *topo.ShardInfo) {
defer wg.Done()
primary, err := wr.ts.GetTablet(ctx, si.PrimaryAlias)
if err != nil {
allErrors.RecordError(vterrors.Wrap(err, "validateWorkflowName.GetTablet"))
return
}
validations := []struct {
query string
msg string
}{{
fmt.Sprintf("select 1 from _vt.vreplication where db_name=%s and workflow=%s", encodeString(primary.DbName()), encodeString(workflow)),
fmt.Sprintf("workflow %s already exists in keyspace %s on tablet %d", workflow, keyspace, primary.Alias.Uid),
}, {
fmt.Sprintf("select 1 from _vt.vreplication where db_name=%s and message='FROZEN' and workflow_sub_type != %d", encodeString(primary.DbName()), binlogdata.VReplicationWorkflowSubType_Partial),
fmt.Sprintf("found previous frozen workflow on tablet %d, please review and delete it first before creating a new workflow",
primary.Alias.Uid),
}}
for _, validation := range validations {
p3qr, err := wr.tmc.VReplicationExec(ctx, primary.Tablet, validation.query)
if err != nil {
allErrors.RecordError(vterrors.Wrap(err, "validateWorkflowName.VReplicationExec"))
return
}
if p3qr != nil && len(p3qr.Rows) != 0 {
allErrors.RecordError(vterrors.Wrap(fmt.Errorf(validation.msg), "validateWorkflowName.VReplicationExec"))
return
}
}
}(si)
}
wg.Wait()
return allErrors.AggrError(vterrors.Aggregate)
}
func (wr *Wrangler) printShards(ctx context.Context, si []*topo.ShardInfo) error {
for _, si := range si {
wr.Logger().Printf(" Shard: %v\n", si.ShardName())
if len(si.SourceShards) != 0 {
wr.Logger().Printf(" Source Shards: %v\n", si.SourceShards)
}
ti, err := wr.ts.GetTablet(ctx, si.PrimaryAlias)
if err != nil {
return err
}
qr, err := wr.tmc.VReplicationExec(ctx, ti.Tablet, fmt.Sprintf("select * from _vt.vreplication where db_name=%v", encodeString(ti.DbName())))
if err != nil {
return err
}
res := sqltypes.Proto3ToResult(qr)
if len(res.Rows) != 0 {
wr.Logger().Printf(" VReplication:\n")
for _, row := range res.Rows {
wr.Logger().Printf(" %v\n", row)
}
}
wr.Logger().Printf(" Is Primary Serving: %v\n", si.IsPrimaryServing)
if len(si.TabletControls) != 0 {
wr.Logger().Printf(" Tablet Controls: %v\n", si.TabletControls)
}
}
return nil
}
func (wr *Wrangler) getPrimaryPositions(ctx context.Context, shards []*topo.ShardInfo) (map[*topo.ShardInfo]string, error) {
mu := sync.Mutex{}
result := make(map[*topo.ShardInfo]string)
wg := sync.WaitGroup{}
rec := concurrency.AllErrorRecorder{}
for _, si := range shards {
wg.Add(1)
go func(si *topo.ShardInfo) {
defer wg.Done()
wr.Logger().Infof("Gathering primary position for %v", topoproto.TabletAliasString(si.PrimaryAlias))
ti, err := wr.ts.GetTablet(ctx, si.PrimaryAlias)
if err != nil {
rec.RecordError(err)
return
}
pos, err := wr.tmc.PrimaryPosition(ctx, ti.Tablet)
if err != nil {
rec.RecordError(err)
return
}
wr.Logger().Infof("Got primary position for %v", topoproto.TabletAliasString(si.PrimaryAlias))
mu.Lock()
result[si] = pos
mu.Unlock()
}(si)
}
wg.Wait()
return result, rec.Error()
}
func (wr *Wrangler) waitForFilteredReplication(ctx context.Context, sourcePositions map[*topo.ShardInfo]string, destinationShards []*topo.ShardInfo, waitTime time.Duration) error {
wg := sync.WaitGroup{}
rec := concurrency.AllErrorRecorder{}
for _, si := range destinationShards {
wg.Add(1)
go func(si *topo.ShardInfo) {
defer wg.Done()
ctx, cancel := context.WithTimeout(ctx, waitTime)
defer cancel()
var pos string
for _, sourceShard := range si.SourceShards {
// find the position it should be at
for s, sp := range sourcePositions {
if s.Keyspace() == sourceShard.Keyspace && s.ShardName() == sourceShard.Shard {
pos = sp
break
}
}
// and wait for it
wr.Logger().Infof("Waiting for %v to catch up", topoproto.TabletAliasString(si.PrimaryAlias))
ti, err := wr.ts.GetTablet(ctx, si.PrimaryAlias)
if err != nil {
rec.RecordError(err)
return
}
if err := wr.tmc.VReplicationWaitForPos(ctx, ti.Tablet, sourceShard.Uid, pos); err != nil {
if strings.Contains(err.Error(), "not found") {
wr.Logger().Infof("%v stream %d was not found. Skipping wait.", topoproto.TabletAliasString(si.PrimaryAlias), sourceShard.Uid)
} else {
rec.RecordError(err)
}
} else {
wr.Logger().Infof("%v caught up", topoproto.TabletAliasString(si.PrimaryAlias))
}
}
}(si)
}
wg.Wait()
return rec.Error()
}
// refreshPrimaryTablets will just RPC-ping all the primary tablets with RefreshState
func (wr *Wrangler) refreshPrimaryTablets(ctx context.Context, shards []*topo.ShardInfo) error {
wg := sync.WaitGroup{}
rec := concurrency.AllErrorRecorder{}
for _, si := range shards {
wg.Add(1)
go func(si *topo.ShardInfo) {
defer wg.Done()
wr.Logger().Infof("RefreshState primary %v", topoproto.TabletAliasString(si.PrimaryAlias))
ti, err := wr.ts.GetTablet(ctx, si.PrimaryAlias)
if err != nil {
rec.RecordError(err)
return
}
if err := wr.tmc.RefreshState(ctx, ti.Tablet); err != nil {
rec.RecordError(err)
} else {
wr.Logger().Infof("%v responded", topoproto.TabletAliasString(si.PrimaryAlias))
}
}(si)
}
wg.Wait()
return rec.Error()
}
// updateShardRecords updates the shard records based on 'from' or 'to' direction.
func (wr *Wrangler) updateShardRecords(ctx context.Context, keyspace string, shards []*topo.ShardInfo, cells []string, servedType topodatapb.TabletType, isFrom bool, clearSourceShards bool) (err error) {
return topotools.UpdateShardRecords(ctx, wr.ts, wr.tmc, keyspace, shards, cells, servedType, isFrom, clearSourceShards, wr.Logger())
}
// updateFrozenFlag sets or unsets the Frozen flag for primary migration. This is performed
// for all primary tablet control records.
func (wr *Wrangler) updateFrozenFlag(ctx context.Context, shards []*topo.ShardInfo, value bool) (err error) {
for i, si := range shards {
updatedShard, err := wr.ts.UpdateShardFields(ctx, si.Keyspace(), si.ShardName(), func(si *topo.ShardInfo) error {
tc := si.GetTabletControl(topodatapb.TabletType_PRIMARY)
if tc != nil {
tc.Frozen = value
return nil
}
// This shard does not have a tablet control record, adding one to set frozen flag
tc = &topodatapb.Shard_TabletControl{
TabletType: topodatapb.TabletType_PRIMARY,
Frozen: value,
}
si.TabletControls = append(si.TabletControls, tc)
return nil
})
if err != nil {
return err
}
shards[i] = updatedShard
}
return nil
}
func encodeString(in string) string {
buf := bytes.NewBuffer(nil)
sqltypes.NewVarChar(in).EncodeSQL(buf)
return buf.String()
}