redis master-slave 切换演练

redis master-slave 切换演练

IP地址

端口

属性

192.168.31.208

6379

master

192.168.31.208

6378

slave

192.168.31.209

6379

master

192.168.31.209

6378

slave

192.168.31.210

6379

master

192.168.31.210

6378

slave

环境变量

PATH=$PATH:$HOME/cpprelease/redis-3.0.2/src/:$HOME/bin

BASE_PATH=/home/beidou_soa/cpprelease/

export PATH

alias redisstart1='cd ~/redis/ && redis-server $BASE_PATH/cfg/redis/redis1.conf && cd -'

alias redisstart2='cd ~/redis/ && redis-server $BASE_PATH/cfg/redis/redis2.conf && cd -'

alias redisstop1='cd ~/redis/ && redis-cli -p 6379 shutdown && cd -'

alias redisstop2='cd ~/redis/ && redis-cli -p 6378 shutdown && cd -'

1.检查环境

[ beidou_soa@localhost ~]$redis-trib.rbcheck192.168.31.208:6379

Connectingtonode192.168.31.208:6379:OK

Connectingtonode192.168.31.210:6378:OK

Connectingtonode192.168.31.209:6378:OK

Connectingtonode192.168.31.210:6379:OK

Connectingtonode192.168.31.209:6379:OK

Connectingtonode192.168.31.208:6378:OK

>>>PerformingClusterCheck(usingnode192.168.31.208:6379)

M:273aa3c0416e7d1795ce678d56bd2db148613f7e192.168.31.208:6379

slots:10923-16383(5461slots) master

1additionalreplica(s)

S:08f61dcd66389dae5c39e375d4f52e1defa77ec1192.168.31.210:6378

slots:(0slots) slave

replicates40cecda23f32cb3b8ff60752c00514f2d7d9c3d0

S:d8e8369bfdbf4f9e0bebd04911181785e3ee1129192.168.31.209:6378

slots:(0slots) slave

replicates4f11d4265178d72e0ccf7edf0ddabf835e9c56df

M:40cecda23f32cb3b8ff60752c00514f2d7d9c3d0192.168.31.210:6379

slots:0-5460(5461slots) master

1additionalreplica(s)

M:4f11d4265178d72e0ccf7edf0ddabf835e9c56df192.168.31.209:6379

slots:5461-10922(5462slots) master

1additionalreplica(s)

S:4b6e2b13b1be1a081db2153dc4beaf430b489605192.168.31.208:6378

slots:(0slots) slave

replicates273aa3c0416e7d1795ce678d56bd2db148613f7e

[OK]Allnodesagreeaboutslotsconfiguration.

>>>Checkforopenslots...

>>>Checkslotscoverage...

[OK]All16384slotscovered. [ beidou_soa@localhost ~]$redis-cli-c-p6379

127.0.0.1:6379>

127.0.0.1:6379>

127.0.0.1:6379>gettestkey001

(nil)

127.0.0.1:6379>

127.0.0.1:6379>

127.0.0.1:6379>settestkey002testvalue002

->Redirectedtoslot[401]locatedat192.168.31.210:6379

OK

192.168.31.210:6379>

192.168.31.210:6379>gettestkey002

"testvalue002"

192.168.31.210:6379>settestkey003testvalue003

OK

2.准备关闭208的master

[ beidou_soa@localhost ~]$redisstop1

3.检查集群状态

查看slave的日志

[ beidou_soa@localhost redis]$vimredis-6378.log

6874:S30Dec15:28:04.755#ErrorconditiononsocketforSYNC:Connectionrefused

6874:S30Dec15:28:05.758*ConnectingtoMASTER192.168.31.208:6379

6874:S30Dec15:28:05.758*MASTER<->SLAVEsyncstarted

6874:S30Dec15:28:05.759#ErrorconditiononsocketforSYNC:Connectionrefused

6874:S30Dec15:28:06.647*FAILmessagereceivedfrom40cecda23f32cb3b8ff60752c00514f2d7d9c3d0about273aa3c0416e7d1795ce678d56bd2db148613f7e

6874:S30Dec15:28:06.647#Clusterstatechanged:fail

6874:S30Dec15:28:06.662#Startofelectiondelayedfor842milliseconds(rank#0,offset105547).

6874:S30Dec15:28:06.762*ConnectingtoMASTER192.168.31.208:6379

6874:S30Dec15:28:06.762*MASTER<->SLAVEsyncstarted

6874:S30Dec15:28:06.763#ErrorconditiononsocketforSYNC:Connectionrefused

6874:S30Dec15:28:07.565#S tartingafailoverelectionforepoch4.

6874:S30Dec15:28:07.567# Failoverelectionwon:I'mthenewmaster.

6874:S30Dec15:28:07.567#configEpochsetto4aftersuccessfulfailover

6874:M30Dec15:28:07.567*Discardingpreviouslycachedmasterstate.

6874:M30Dec15:28:07.567#Clusterstatechanged:ok

查看集群状态

[ beidou_soa@localhost ~]$redis-trib.rbcheck192.168.31.208:6378

Connectingtonode192.168.31.208:6378:OK

Connectingtonode192.168.31.209:6378:OK

Connectingtonode192.168.31.209:6379:OK

Connectingtonode192.168.31.210:6378:OK

Connectingtonode192.168.31.210:6379:OK

>>>PerformingClusterCheck(usingnode192.168.31.208:6378)

M:4b6e2b13b1be1a081db2153dc4beaf430b489605192.168.31.208:6378

slots:10923-16383(5461slots) master

0additionalreplica(s)

S:d8e8369bfdbf4f9e0bebd04911181785e3ee1129192.168.31.209:6378

slots:(0slots) slave

replicates4f11d4265178d72e0ccf7edf0ddabf835e9c56df

M:4f11d4265178d72e0ccf7edf0ddabf835e9c56df192.168.31.209:6379

slots:5461-10922(5462slots) master

1additionalreplica(s)

S:08f61dcd66389dae5c39e375d4f52e1defa77ec1192.168.31.210:6378

slots:(0slots) slave

replicates40cecda23f32cb3b8ff60752c00514f2d7d9c3d0

M:40cecda23f32cb3b8ff60752c00514f2d7d9c3d0192.168.31.210:6379

slots:0-5460(5461slots) master

1additionalreplica(s)

[OK]Allnodesagreeaboutslotsconfiguration.

>>>Checkforopenslots...

>>>Checkslotscoverage...

[OK]All16384slotscovered.

4.关闭slave

[ beidou_soa@localhost ~]$redisstop1

5.检查集群状态

[ beidou_soa@localhost ~]$redis-trib.rbcheck192.168.31.209:637