redis 高可用

机器信息

主节点 192.168.56.11 Master
从节点 192.168.56.12 Slave-node1
从节点 192.168.56.13 Slave-node2

安装redis

三台节点安装一样
1.安装
[root@linux-node1 tools]# wget http://download.redis.io/redis-stable.tar.gz
[root@linux-node1 tools]# tar zxvf redis-stable.tar.gz
[root@linux-node1 tools]# cd redis-stable/
[root@linux-node1 redis-stable]# make
[root@linux-node1 redis-stable]# cd src/
[root@linux-node1 src]# cp redis-server redis-cli redis-check-aof redis-check-rdb redis-sentinel redis-trib.rb /usr/local/bin/

2.新建目录，存放配置文件
[root@linux-node1 src]# mkdir /etc/redis
[root@linux-node1 src]# mkdir /var/redis
[root@linux-node1 src]# mkdir /var/redis/log
[root@linux-node1 src]# mkdir /var/redis/run
[root@linux-node1 src]# mkdir /var/redis/redis

3.配置模版cp 到指定配置文件
[root@linux-node1 src]# cd ..
[root@linux-node1 redis-stable]# ll
total 304
-rw-r--r-- 1 elasticsearch elasticsearch 149854 Jan 24 18:16 00-RELEASENOTES
-rw-r--r-- 1 elasticsearch elasticsearch 53 Jan 24 18:16 BUGS
-rw-r--r-- 1 elasticsearch elasticsearch 1815 Jan 24 18:16 CONTRIBUTING
-rw-r--r-- 1 elasticsearch elasticsearch 1487 Jan 24 18:16 COPYING
drwxr-xr-x 6 elasticsearch elasticsearch 4096 Jan 31 11:06 deps
-rw-r--r-- 1 elasticsearch elasticsearch 11 Jan 24 18:16 INSTALL
-rw-r--r-- 1 elasticsearch elasticsearch 151 Jan 24 18:16 Makefile
-rw-r--r-- 1 elasticsearch elasticsearch 4223 Jan 24 18:16 MANIFESTO
-rw-r--r-- 1 elasticsearch elasticsearch 20543 Jan 24 18:16 README.md
-rw-r--r-- 1 elasticsearch elasticsearch 58353 Jan 24 18:16 redis.conf
-rwxr-xr-x 1 elasticsearch elasticsearch 271 Jan 24 18:16 runtest
-rwxr-xr-x 1 elasticsearch elasticsearch 280 Jan 24 18:16 runtest-cluster
-rwxr-xr-x 1 elasticsearch elasticsearch 281 Jan 24 18:16 runtest-sentinel
-rw-r--r-- 1 elasticsearch elasticsearch 7606 Jan 24 18:16 sentinel.conf
drwxr-xr-x 3 elasticsearch elasticsearch 8192 Jan 31 11:07 src
drwxr-xr-x 10 elasticsearch elasticsearch 4096 Jan 24 18:16 tests
drwxr-xr-x 8 elasticsearch elasticsearch 4096 Jan 24 18:16 utils
[root@linux-node1 redis-stable]# cp redis.conf /etc/redis/redis.conf

4.配置启动脚本
[root@linux-node1 redis-stable]# cd utils/
[root@linux-node1 utils]# ll
total 52
-rw-r--r-- 1 elasticsearch elasticsearch 593 Jan 24 18:16 build-static-symbols.tcl
-rw-r--r-- 1 elasticsearch elasticsearch 1303 Jan 24 18:16 cluster_fail_time.tcl
-rw-r--r-- 1 elasticsearch elasticsearch 1070 Jan 24 18:16 corrupt_rdb.c
drwxr-xr-x 2 elasticsearch elasticsearch 57 Jan 24 18:16 create-cluster
-rwxr-xr-x 1 elasticsearch elasticsearch 2137 Jan 24 18:16 generate-command-help.rb
drwxr-xr-x 3 elasticsearch elasticsearch 30 Jan 24 18:16 graphs
drwxr-xr-x 2 elasticsearch elasticsearch 37 Jan 24 18:16 hashtable
drwxr-xr-x 2 elasticsearch elasticsearch 67 Jan 24 18:16 hyperloglog
-rwxr-xr-x 1 elasticsearch elasticsearch 9567 Jan 24 18:16 install_server.sh
drwxr-xr-x 2 elasticsearch elasticsearch 60 Jan 24 18:16 lru
-rw-r--r-- 1 elasticsearch elasticsearch 1277 Jan 24 18:16 redis-copy.rb
-rwxr-xr-x 1 elasticsearch elasticsearch 1098 Jan 24 18:16 redis_init_script
-rwxr-xr-x 1 elasticsearch elasticsearch 1047 Jan 24 18:16 redis_init_script.tpl
-rw-r--r-- 1 elasticsearch elasticsearch 1762 Jan 24 18:16 redis-sha1.rb
drwxr-xr-x 2 elasticsearch elasticsearch 130 Jan 24 18:16 releasetools
-rwxr-xr-x 1 elasticsearch elasticsearch 3787 Jan 24 18:16 speed-regression.tcl
-rwxr-xr-x 1 elasticsearch elasticsearch 693 Jan 24 18:16 whatisdoing.sh
[root@linux-node1 utils]# cp redis_init_script /etc/init.d/redis
[root@linux-node1 utils]# chmod 755 /etc/init.d/redis

5.修改脚本pid及conf 路径为实际路径
[root@linux-node1 utils]# vim /etc/init.d/redis
1、#!/bin/sh
2、# Simple Redis init.d script conceived to work on Linux systems
3、# as it does use of the /proc filesystem.

4、REDISPORT=6379
5、EXEC=/usr/local/bin/redis-server
6、CLIEXEC=/usr/local/bin/redis-cli

7、PIDFILE=/var/redis/run/redis_${REDISPORT}.pid
8、CONF="/etc/redis/redis.conf"

。。。。。。

6.主从复制配置
[root@linux-node1 utils]# vim /etc/redis/redis.conf
.......
port 6379
.......
daemonize yes #这个修改为yes
.......
bind 192.168.56.11 #绑定的主机地址。
.......
pidfile /var/redis/run/redis_6379.pid
.......
logfile /var/redis/log/redis_6379.log
.......
dir /var/redis/redis ＃redis数据目录
.......
appendonly yes #启用AOF持久化方式
appendfilename "appendonly.aof" #AOF文件的名称，默认为appendonly.aof
appendfsync everysec #每秒钟强制写入磁盘一次，在性能和持久化方面做了很好的折中，是受推荐的方式。
.....
save 900 1 #启用RDB快照功能，默认就是启用的
save 300 10
save 60 10000 ＃即在多少秒的时间内，有多少key被改变的数据添加到.rdb文件里
.......
dbfilename dump.rdb ＃快照文件名称
......

slave-node2和slave-node3两个从节点相比于主节点的redis.conf配置，只是多了下面一行配置，其它都一样：
slaveof 192.168.56.11 6379

7.启动redis
[root@linux-node1 utils]# /etc/init.d/redis start
Starting Redis server...
[root@linux-node1 utils]# ps -aux|grep redis
root 112101 0.0 0.3 145248 7552 ? Ssl 11:28 0:00 /usr/local/bin/redis-server 192.168.56.11:6379
root 112106 0.0 0.0 112644 952 pts/2 R+ 11:28 0:00 grep --color=auto redis
[root@linux-node1 utils]# lsof -i:6379
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
redis-ser 112101 root 6u IPv4 1560215 0t0 TCP linux-node1:6379 (LISTEN)
[root@linux-node1 utils]#

8.登陆主节点查看状态
[root@linux-node1 utils]# redis-cli -h 192.168.56.11 -p 6379
192.168.56.11:6379> info replication

Replication

role:master
connected_slaves:2
slave0:ip=192.168.56.12,port=6379,state=online,offset=322,lag=0
slave1:ip=192.168.56.13,port=6379,state=online,offset=322,lag=0
master_replid:65bd9ce01cb8ef098a503f654bb4cc6d9cf58cf1
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:322
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:322
192.168.56.11:6379>

9.登陆从节点查看状态
[root@linux-node2 utils]# redis-cli -h 192.168.56.12 -p 6379
192.168.56.12:6379> info replication

Replication

role:slave
master_host:192.168.56.11
master_port:6379
master_link_status:up
master_last_io_seconds_ago:10
master_sync_in_progress:0
slave_repl_offset:9100
slave_priority:100
slave_read_only:1
connected_slaves:0
master_replid:65bd9ce01cb8ef098a503f654bb4cc6d9cf58cf1
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:9100
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:9100

[root@linux-node3 utils]# redis-cli -h 192.168.56.13 -p 6379
192.168.56.13:6379> info replication

Replication

role:slave
master_host:192.168.56.11
master_port:6379
master_link_status:up
master_last_io_seconds_ago:7
master_sync_in_progress:0
slave_repl_offset:9184
slave_priority:100
slave_read_only:1
connected_slaves:0
master_replid:65bd9ce01cb8ef098a503f654bb4cc6d9cf58cf1
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:9184
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:295
repl_backlog_histlen:8890
192.168.56.13:6379>

10.测试数据同步
1）：主节点写入数据
[root@linux-node1 utils]# redis-cli -h 192.168.56.11 -p 6379
192.168.56.11:6379> set name ll
OK
192.168.56.11:6379> get name
"ll"
192.168.56.11:6379>

2）从节点检查数据是否写入
[root@linux-node2 utils]# redis-cli -h 192.168.56.12 -p 6379
192.168.56.12:6379> get name
"ll"
192.168.56.12:6379>
[root@linux-node3 utils]# redis-cli -h 192.168.56.13 -p 6379
192.168.56.13:6379> get name
"ll"
192.168.56.13:6379>

11.配置Sentinel （三台都要配置）
[root@linux-node1 ~]# vim /etc/redis/sentinel.conf
daemonize yes #后台运行
protected-mode no #sentinel 保护模式关掉
port 26379 #端口号
sentinel monitor redis-master 192.168.56.11 6379 2 #sentinel 去监视一个叫redis-master的master,ip为192.168.56.11 端口为6379，2表示2个sentinel检测到master异常才会判定其失效，即只有2个sentinel 都判定master失效才会自动迁移，如果sentinel 不达标,则不会自动故障迁移。

sentinel down-after-milliseconds redis-master 15000 #指定sentinel判定master断线的时间
sentinel failover-timeout redis-master 900000 #如果在多少秒内没有把宕机的那台master恢复，那么就认为这是一次真正的宕机。
sentinel auth-pass redis-master redispass #设置主从服务器进行身份验证的密码
logfile "/var/redis/log/sentinel.log" #日志路径
12.启动
[root@linux-node1 ~]# redis-sentinel /etc/redis/sentinel.conf

13.检查服务状态
[root@linux-node1 ~]# redis-cli -p 26379
127.0.0.1:26379> ping
PONG
127.0.0.1:26379> info sentinel

Sentinel

sentinel_masters:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
sentinel_simulate_failure_flags:0
master0:name=redis-master,status=ok,address=192.168.56.11:6379,slaves=2,sentinels=4
127.0.0.1:26379>

14.测试停掉主节点
[root@linux-node1 redis]# ps -aux|grep redis
root 2971 0.0 0.0 107932 188 pts/0 S+ 14:51 0:00 tail -f /var/redis/log/sentinel.log
root 4292 0.3 0.4 147296 9804 ? Rsl 16:12 0:04 /usr/local/bin/redis-server 192.168.56.11:6379
root 4445 0.4 0.3 145248 7764 ? Ssl 16:21 0:03 redis-sentinel *:26379 [sentinel]
root 4956 0.0 0.0 112644 948 pts/2 R+ 16:34 0:00 grep --color=auto redis
[root@linux-node1 redis]# kill 4292
[root@linux-node1 redis]# kill 4292
-bash: kill: (4292) - No such process
[root@linux-node1 redis]# ps -aux|grep redis
root 2971 0.0 0.0 107932 188 pts/0 S+ 14:51 0:00 tail -f /var/redis/log/sentinel.log
root 4445 0.4 0.3 145248 7764 ? Ssl 16:21 0:03 redis-sentinel *:26379 [sentinel]
root 4959 0.0 0.0 112644 952 pts/2 R+ 16:34 0:00 grep --color=auto redis

15.查看Sentinel信息
[root@linux-node1 bin]# redis-cli -p 26379
127.0.0.1:26379> info sentinel

Sentinel

16.查看从节点信息
[root@linux-node2 redis]# redis-cli -h 192.168.56.12 -p 6379
192.168.56.12:6379> info replication

Replication

role:slave
master_host:192.168.56.13
master_port:6379
master_link_status:up
master_last_io_seconds_ago:0
master_sync_in_progress:0
slave_repl_offset:282669
slave_priority:100
slave_read_only:1
connected_slaves:0
master_replid:8e7d68eeb02372affe3117487ab02dd79edeb452
master_replid2:d11ebc69f22e7b543c649396d1c687d504c965ac
master_repl_offset:282669
second_repl_offset:271992
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:169
repl_backlog_histlen:282501
192.168.56.12:6379>

[root@linux-node3 redis]# redis-cli -h 192.168.56.13 -p 6379
192.168.56.13:6379> info replication

Replication

role:master
connected_slaves:1
slave0:ip=192.168.56.12,port=6379,state=online,offset=286612,lag=1
master_replid:8e7d68eeb02372affe3117487ab02dd79edeb452
master_replid2:d11ebc69f22e7b543c649396d1c687d504c965ac
master_repl_offset:286612
second_repl_offset:271992
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:286612
192.168.56.13:6379>

17.测试数据同步
主节点
[root@linux-node3 redis]# redis-cli -h 192.168.56.13 -p 6379
192.168.56.13:6379> info replication

Replication

从节点
[root@linux-node2 redis]# redis-cli -h 192.168.56.12 -p 6379
192.168.56.12:6379> info replication

Replication

查看日志
[root@linux-node1 ~]# tail -f /var/redis/log/sentinel.log
2899:X 31 Jan 14:49:31.246 # Redis version=4.0.7, bits=64, commit=00000000, modified=0, pid=2899, just started
2899:X 31 Jan 14:49:31.246 # Configuration loaded
2900:X 31 Jan 14:49:31.250 * Running mode=sentinel, port=26379.
2900:X 31 Jan 14:49:31.251 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
2900:X 31 Jan 14:49:31.252 # Sentinel ID is 9e463b4a274b60575d54922048421d2bc145ec0f
3322:X 31 Jan 15:09:47.689 # +new-epoch 1
3322:X 31 Jan 15:09:47.972 * +sentinel sentinel 3fa2e74e1dcc85ee309844e56160f747c0623d88 192.168.56.12 26379 @ redis-master 192.168.56.11 6379
3739:X 31 Jan 15:34:37.711 # +sdown sentinel 3fa2e74e1dcc85ee309844e56160f747c0623d88 192.168.56.12 26379 @ redis-master 192.168.56.11 6379
3739:X 31 Jan 15:34:37.711 # +sdown sentinel e76dae936d392ede537557bf10d0e2b20d011285 192.168.56.13 0 @ redis-master 192.168.56.11 6379
3739:X 31 Jan 15:34:37.711 # +sdown sentinel d99b9551d44054e6f6c09e3a7f6e6ff7ae34fa08 192.168.56.13
4445:X 31 Jan 16:34:36.305 # +sdown master redis-master 192.168.56.11 6379
4445:X 31 Jan 16:34:36.414 # +new-epoch 8
4445:X 31 Jan 16:34:36.416 # +vote-for-leader d99b9551d44054e6f6c09e3a7f6e6ff7ae34fa08 8
4445:X 31 Jan 16:34:36.698 # +config-update-from sentinel d99b9551d44054e6f6c09e3a7f6e6ff7ae34fa08 192.168.56.13 26379 @ redis-master 192.168.56.11 6379
4445:X 31 Jan 16:34:36.698 # +switch-master redis-master 192.168.56.11 6379 192.168.56.13 6379
4445:X 31 Jan 16:34:36.699 * +slave slave 192.168.56.12:6379 192.168.56.12 6379 @ redis-master 192.168.56.13 6379
4445:X 31 Jan 16:34:36.699 * +slave slave 192.168.56.11:6379 192.168.56.11 6379 @ redis-master 192.168.56.13 6379
4445:X 31 Jan 16:34:51.759 # +sdown slave 192.168.56.11:6379 192.168.56.11 6379 @ redis-master 192.168.56.13 6379

posted @ 2018-02-07 18:27 clown_x 阅读(210) 评论(0) 编辑收藏举报

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redis 高可用

机器信息

安装redis

Replication

Replication

Replication

Sentinel

Sentinel

Replication

Replication

Replication

Replication

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