redis复制集(sentinel)

redis复制集(sentinel)

https://www.jianshu.com/p/45ffd2a84143

内核配置

cat >> /etc/rc.local << EOF echo never > /sys/kernel/mm/transparent_hugepage/enabled EOF cat >> /etc/sysctl.conf << EOF vm.overcommit_memory = 1 EOF

静态解析

cat >> /etc/hosts << EOF 10.105.225.8 redis-master 10.154.146.25 redis-slave EOF

优化

tcp-backlog 65536 timout 300 tcp-keepalive 300 maxclients 10000 maxmemory 2G maxmemory-policy volatile-lru

配置复制

# master /etc/redis.conf #daemonize no daemonize yes #bind 127.0.0.1 bind 0.0.0.0 #protected-mode yes protected-mode no #dir /var/lib/redis/ dir /opt/www/redis/ masterauth @sentinel requirepass @sentinel # slave /etc/redis.conf #daemonize no daemonize yes #bind 127.0.0.1 bind 0.0.0.0 #protected-mode yes protected-mode no #dir /var/lib/redis/ dir /opt/www/redis/ # 从机多了slaveof配置，注意主从要匹配 slaveof redis-master 6379 masterauth @sentinel requirepass @sentinel

启用服务

systemctl restart redis && systemctl enable redis systemctl restart redis-sentinel && systemctl enable redis-sentinel

查看配置状态

#redis-cli -h redis-master -a @sentinel info replication # Replication role:master connected_slaves:1 slave0:ip=10.154.146.25,port=6379,state=online,offset=29,lag=1 master_repl_offset:29 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:2 repl_backlog_histlen:28 #redis-cli -h redis-slave -a @sentinel info replication # Replication role:slave master_host:redis-master master_port:6379 master_link_status:up master_last_io_seconds_ago:1 master_sync_in_progress:0 slave_repl_offset:15 slave_priority:100 slave_read_only:1 connected_slaves:0 master_repl_offset:0 repl_backlog_active:0 repl_backlog_size:1048576 repl_backlog_first_byte_offset:0 repl_backlog_histlen:0

配置sentinel

# 3台哨兵，2票选举 cat > /etc/redis-sentinel.conf << EOF port 26379 protected-mode no daemonize yes dir /tmp sentinel monitor mymaster redis-master 6379 2 sentinel down-after-milliseconds mymaster 2000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 5000 sentinel auth-pass mymaster @sentinel logfile /var/log/redis/sentinel.log EOF cat > /etc/sentinel_26380.conf << EOF port 26380 protected-mode no daemonize yes dir /tmp sentinel monitor mymaster redis-01-master 6379 2 sentinel down-after-milliseconds mymaster 2000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 5000 sentinel auth-pass mymaster @sentinel logfile /var/log/redis/sentinel_26380.log EOF cat > /etc/sentinel_26381.conf << EOF port 26381 protected-mode no daemonize yes dir /tmp sentinel monitor mymaster redis-02-master 6379 2 sentinel down-after-milliseconds mymaster 2000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 5000 sentinel auth-pass mymaster @sentinel logfile /var/log/redis/sentinel_26381.log EOF cat > /etc/sentinel_26382.conf << EOF port 26382 protected-mode no daemonize yes dir /tmp sentinel monitor mymaster redis-03-master 6379 2 sentinel down-after-milliseconds mymaster 2000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 5000 sentinel auth-pass mymaster @sentinel logfile /var/log/redis/sentinel_26382.log EOF # /etc/rc.local /usr/bin/redis-sentinel /etc/sentinel_26380.conf & /usr/bin/redis-sentinel /etc/sentinel_26381.conf & /usr/bin/redis-sentinel /etc/sentinel_26382.conf &

sentinel状态

#redis-cli -h redis-master -p 26379 -a @sentinel info sentinel # Sentinel sentinel_masters:1 sentinel_tilt:0 sentinel_running_scripts:0 sentinel_scripts_queue_length:0 master0:name=redis-01,status=ok,address=10.105.225.8:6379,slaves=1,sentinels=3 #redis-cli -h redis-slave -p 26379 -a @sentinel info sentinel # Sentinel sentinel_masters:1 sentinel_tilt:0 sentinel_running_scripts:0 sentinel_scripts_queue_length:0 master2:name=redis-01,status=ok,address=10.105.225.8:6379,slaves=1,sentinels=3

sentinel切换日志

sentinel日志 [20104] 28 Mar 17:29:54.042 # +sdown master mymaster 10.105.225.8 6379 [20104] 28 Mar 17:29:54.104 # +odown master mymaster 10.105.225.8 6379 #quorum 2/2 [20104] 28 Mar 17:29:54.104 # +new-epoch 1 [20104] 28 Mar 17:29:54.104 # +try-failover master mymaster 10.105.225.8 6379 [20104] 28 Mar 17:29:54.169 # +vote-for-leader 016236a44f1376e34b8e6696c1b7eb0d8ebc3e59 1 [20104] 28 Mar 17:29:54.169 # 10.154.146.25:26379 voted for b9d0dc3e20c5c138304419a17f572e56be61a3fd 1 [20104] 28 Mar 17:29:54.169 # 10.154.43.8:26379 voted for 27c052e9e9b3ad99edc6fe85f5566157e9865309 1 [20104] 28 Mar 17:29:54.169 # 10.154.162.125:26379 voted for b9d0dc3e20c5c138304419a17f572e56be61a3fd 1 [20104] 28 Mar 17:29:54.189 # 10.154.160.30:26379 voted for b9d0dc3e20c5c138304419a17f572e56be61a3fd 1 [20104] 28 Mar 17:29:54.195 # 10.105.93.170:26379 voted for 1823e7153adb3b302a6c05e2a79ce508217e5b9f 1 [20104] 28 Mar 17:30:04.361 # -failover-abort-not-elected master redis-01 10.105.225.8 6379 [20104] 28 Mar 17:30:04.416 # Next failover delay: I will not start a failover before Wed Mar 28 17:35:54 2018 [20104] 28 Mar 17:35:54.336 # +new-epoch 2 [20104] 28 Mar 17:35:54.341 # +vote-for-leader b9d0dc3e20c5c138304419a17f572e56be61a3fd 2 [20104] 28 Mar 17:35:54.341 # Next failover delay: I will not start a failover before Wed Mar 28 17:41:54 2018 [20104] 28 Mar 17:35:54.728 # +config-update-from sentinel 10.154.162.125:26379 10.154.162.125 26379 @ redis-01 10.105.225.8 6379 [20104] 28 Mar 17:35:54.728 # +switch-master redis-01 10.105.225.8 6379 10.154.146.25 6379 [20104] 28 Mar 17:35:54.728 * +slave slave 10.105.225.8:6379 10.105.225.8 6379 @ redis-01 10.154.146.25 6379 [20104] 28 Mar 17:36:24.754 # +sdown slave 10.105.225.8:6379 10.105.225.8 6379 @ redis-01 10.154.146.25 6379 posted on 2018-03-30 09:54 北京涛子 阅读( ...) 评论( ...) 编辑 收藏

转载于:https://www.cnblogs.com/liujitao79/p/8674560.html