-
Notifications
You must be signed in to change notification settings - Fork 2.1k
/
flavor_filepos.go
345 lines (294 loc) · 9.85 KB
/
flavor_filepos.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
/*
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 mysql
import (
"context"
"fmt"
"io"
"strconv"
"strings"
"time"
vtrpcpb "vitess.io/vitess/go/vt/proto/vtrpc"
"vitess.io/vitess/go/vt/vterrors"
)
type filePosFlavor struct {
format BinlogFormat
file string
savedEvent BinlogEvent
}
// newFilePosFlavor creates a new filePos flavor.
func newFilePosFlavor() flavor {
return &filePosFlavor{}
}
// primaryGTIDSet is part of the Flavor interface.
func (flv *filePosFlavor) primaryGTIDSet(c *Conn) (GTIDSet, error) {
qr, err := c.ExecuteFetch("SHOW MASTER STATUS", 100, true /* wantfields */)
if err != nil {
return nil, err
}
if len(qr.Rows) == 0 {
return nil, ErrNoPrimaryStatus
}
resultMap, err := resultToMap(qr)
if err != nil {
return nil, err
}
pos, err := strconv.Atoi(resultMap["Position"])
if err != nil {
return nil, fmt.Errorf("invalid FilePos GTID (%v): expecting pos to be an integer", resultMap["Position"])
}
return filePosGTID{
file: resultMap["File"],
pos: pos,
}, nil
}
// purgedGTIDSet is part of the Flavor interface.
func (flv *filePosFlavor) purgedGTIDSet(c *Conn) (GTIDSet, error) {
return nil, nil
}
// gtidMode is part of the Flavor interface.
func (flv *filePosFlavor) gtidMode(c *Conn) (string, error) {
qr, err := c.ExecuteFetch("select @@global.gtid_mode", 1, false)
if err != nil {
return "", err
}
if len(qr.Rows) != 1 || len(qr.Rows[0]) != 1 {
return "", vterrors.Errorf(vtrpcpb.Code_INTERNAL, "unexpected result format for gtid_mode: %#v", qr)
}
return qr.Rows[0][0].ToString(), nil
}
// serverUUID is part of the Flavor interface.
func (flv *filePosFlavor) serverUUID(c *Conn) (string, error) {
// keep @@global as lowercase, as some servers like the Ripple binlog server only honors a lowercase `global` value
qr, err := c.ExecuteFetch("SELECT @@global.server_uuid", 1, false)
if err != nil {
return "", err
}
if len(qr.Rows) != 1 || len(qr.Rows[0]) != 1 {
return "", vterrors.Errorf(vtrpcpb.Code_INTERNAL, "unexpected result format for server_uuid: %#v", qr)
}
return qr.Rows[0][0].ToString(), nil
}
func (flv *filePosFlavor) startReplicationCommand() string {
return "unsupported"
}
func (flv *filePosFlavor) restartReplicationCommands() []string {
return []string{"unsupported"}
}
func (flv *filePosFlavor) stopReplicationCommand() string {
return "unsupported"
}
func (flv *filePosFlavor) stopIOThreadCommand() string {
return "unsupported"
}
func (flv *filePosFlavor) stopSQLThreadCommand() string {
return "unsupported"
}
func (flv *filePosFlavor) startSQLThreadCommand() string {
return "unsupported"
}
// sendBinlogDumpCommand is part of the Flavor interface.
func (flv *filePosFlavor) sendBinlogDumpCommand(c *Conn, serverID uint32, binlogFilename string, startPos Position) error {
rpos, ok := startPos.GTIDSet.(filePosGTID)
if !ok {
return fmt.Errorf("startPos.GTIDSet is wrong type - expected filePosGTID, got: %#v", startPos.GTIDSet)
}
flv.file = rpos.file
return c.WriteComBinlogDump(serverID, rpos.file, uint32(rpos.pos), 0)
}
// readBinlogEvent is part of the Flavor interface.
func (flv *filePosFlavor) readBinlogEvent(c *Conn) (BinlogEvent, error) {
if ret := flv.savedEvent; ret != nil {
flv.savedEvent = nil
return ret, nil
}
for {
result, err := c.ReadPacket()
if err != nil {
return nil, err
}
switch result[0] {
case EOFPacket:
return nil, NewSQLError(CRServerLost, SSUnknownSQLState, "%v", io.EOF)
case ErrPacket:
return nil, ParseErrorPacket(result)
}
buf, semiSyncAckRequested, err := c.AnalyzeSemiSyncAckRequest(result[1:])
if err != nil {
return nil, err
}
event := newFilePosBinlogEventWithSemiSyncInfo(buf, semiSyncAckRequested)
switch event.Type() {
case eGTIDEvent, eAnonymousGTIDEvent, ePreviousGTIDsEvent, eMariaGTIDListEvent:
// Don't transmit fake or irrelevant events because we should not
// resume replication at these positions.
continue
case eMariaGTIDEvent:
// Copied from mariadb flavor.
const FLStandalone = 1
flags2 := result[8+4]
// This means that it's also a BEGIN event.
if flags2&FLStandalone == 0 {
return newFilePosQueryEvent("begin", event.Timestamp()), nil
}
// Otherwise, don't send this event.
continue
case eFormatDescriptionEvent:
format, err := event.Format()
if err != nil {
return nil, err
}
flv.format = format
case eRotateEvent:
if !flv.format.IsZero() {
stripped, _, _ := event.StripChecksum(flv.format)
_, flv.file = stripped.(*filePosBinlogEvent).rotate(flv.format)
// No need to transmit. Just update the internal position for the next event.
continue
}
case eXIDEvent, eTableMapEvent,
eWriteRowsEventV0, eWriteRowsEventV1, eWriteRowsEventV2,
eDeleteRowsEventV0, eDeleteRowsEventV1, eDeleteRowsEventV2,
eUpdateRowsEventV0, eUpdateRowsEventV1, eUpdateRowsEventV2:
flv.savedEvent = event
return newFilePosGTIDEvent(flv.file, event.nextPosition(flv.format), event.Timestamp()), nil
case eQueryEvent:
q, err := event.Query(flv.format)
if err == nil && strings.HasPrefix(q.SQL, "#") {
continue
}
flv.savedEvent = event
return newFilePosGTIDEvent(flv.file, event.nextPosition(flv.format), event.Timestamp()), nil
default:
// For unrecognized events, send a fake "repair" event so that
// the position gets transmitted.
if !flv.format.IsZero() {
if v := event.nextPosition(flv.format); v != 0 {
flv.savedEvent = newFilePosQueryEvent("repair", event.Timestamp())
return newFilePosGTIDEvent(flv.file, v, event.Timestamp()), nil
}
}
}
return event, nil
}
}
// resetReplicationCommands is part of the Flavor interface.
func (flv *filePosFlavor) resetReplicationCommands(c *Conn) []string {
return []string{
"unsupported",
}
}
// resetReplicationParametersCommands is part of the Flavor interface.
func (flv *filePosFlavor) resetReplicationParametersCommands(c *Conn) []string {
return []string{
"unsupported",
}
}
// setReplicationPositionCommands is part of the Flavor interface.
func (flv *filePosFlavor) setReplicationPositionCommands(pos Position) []string {
return []string{
"unsupported",
}
}
// setReplicationPositionCommands is part of the Flavor interface.
func (flv *filePosFlavor) changeReplicationSourceArg() string {
return "unsupported"
}
// status is part of the Flavor interface.
func (flv *filePosFlavor) status(c *Conn) (ReplicationStatus, error) {
qr, err := c.ExecuteFetch("SHOW SLAVE STATUS", 100, true /* wantfields */)
if err != nil {
return ReplicationStatus{}, err
}
if len(qr.Rows) == 0 {
// The query returned no data, meaning the server
// is not configured as a replica.
return ReplicationStatus{}, ErrNotReplica
}
resultMap, err := resultToMap(qr)
if err != nil {
return ReplicationStatus{}, err
}
return parseFilePosReplicationStatus(resultMap)
}
func parseFilePosReplicationStatus(resultMap map[string]string) (ReplicationStatus, error) {
status := parseReplicationStatus(resultMap)
status.Position = status.FilePosition
status.RelayLogPosition = status.RelayLogSourceBinlogEquivalentPosition
return status, nil
}
// primaryStatus is part of the Flavor interface.
func (flv *filePosFlavor) primaryStatus(c *Conn) (PrimaryStatus, error) {
qr, err := c.ExecuteFetch("SHOW MASTER STATUS", 100, true /* wantfields */)
if err != nil {
return PrimaryStatus{}, err
}
if len(qr.Rows) == 0 {
// The query returned no data. We don't know how this could happen.
return PrimaryStatus{}, ErrNoPrimaryStatus
}
resultMap, err := resultToMap(qr)
if err != nil {
return PrimaryStatus{}, err
}
return parseFilePosPrimaryStatus(resultMap)
}
func parseFilePosPrimaryStatus(resultMap map[string]string) (PrimaryStatus, error) {
status := parsePrimaryStatus(resultMap)
status.Position = status.FilePosition
return status, nil
}
// waitUntilPositionCommand is part of the Flavor interface.
func (flv *filePosFlavor) waitUntilPositionCommand(ctx context.Context, pos Position) (string, error) {
filePosPos, ok := pos.GTIDSet.(filePosGTID)
if !ok {
return "", fmt.Errorf("Position is not filePos compatible: %#v", pos.GTIDSet)
}
if deadline, ok := ctx.Deadline(); ok {
timeout := time.Until(deadline)
if timeout <= 0 {
return "", fmt.Errorf("timed out waiting for position %v", pos)
}
return fmt.Sprintf("SELECT MASTER_POS_WAIT('%s', %d, %.6f)", filePosPos.file, filePosPos.pos, timeout.Seconds()), nil
}
return fmt.Sprintf("SELECT MASTER_POS_WAIT('%s', %d)", filePosPos.file, filePosPos.pos), nil
}
func (*filePosFlavor) startReplicationUntilAfter(pos Position) string {
return "unsupported"
}
func (*filePosFlavor) startSQLThreadUntilAfter(pos Position) string {
return "unsupported"
}
// enableBinlogPlaybackCommand is part of the Flavor interface.
func (*filePosFlavor) enableBinlogPlaybackCommand() string {
return ""
}
// disableBinlogPlaybackCommand is part of the Flavor interface.
func (*filePosFlavor) disableBinlogPlaybackCommand() string {
return ""
}
// baseShowTables is part of the Flavor interface.
func (*filePosFlavor) baseShowTables() string {
return mysqlFlavor{}.baseShowTables()
}
// baseShowTablesWithSizes is part of the Flavor interface.
func (*filePosFlavor) baseShowTablesWithSizes() string {
return TablesWithSize56
}
// supportsCapability is part of the Flavor interface.
func (*filePosFlavor) supportsCapability(serverVersion string, capability FlavorCapability) (bool, error) {
switch capability {
default:
return false, nil
}
}