redis自带的sentinel ，可以实现多个实例的主从复制，容灾切换
下载安装使用的是redis-5.0.7
三台虚拟机
ip地址分别是 172.16.221.130 131 132 132为master
三台机器统一安装脚本,网上找的脚本改的
#!/usr/bin/env bash
function install_redis () {
#################################################################################################
cd /usr/local/src
if [ ! -f "redis-5.0.7.tar.gz" ]; then
wget http://download.redis.io/releases/redis-5.0.7.tar.gz
fi
cd /usr/local/src
tar -zxvf /usr/local/src/redis-5.0.7.tar.gz
cd redis-5.0.7
make PREFIX=/usr/local/redis install
mkdir -p /usr/local/redis/{etc,var}
rsync -avz redis.conf /usr/local/redis/etc/
sed -i 's@pidfile.*@pidfile /var/run/redis-server.pid@' /usr/local/redis/etc/redis.conf
sed -i "s@logfile.*@logfile /usr/local/redis/var/redis.log@" /usr/local/redis/etc/redis.conf
sed -i "s@^dir.*@dir /usr/local/redis/var@" /usr/local/redis/etc/redis.conf
sed -i 's/daemonize no/daemonize yes/g' /usr/local/redis/etc/redis.conf
sed -i 's/^# bind 127.0.0.1/bind 0.0.0.0/g' /usr/local/redis/etc/redis.conf
#################################################################################################
}
install_redis然后 chmod 777 install.sh 上传到另外两台服务器
scp install.sh root@172.16.221.131:/usr/local/src/ scp install.sh root@172.16.221.132:/usr/local/src/
分别运行 sh -x install.sh
redis启动脚本 三台机器都要
vim /etc/init.d/redis-server
#!/bin/bash
#
# redis - this script starts and stops the redis-server daemon
#
# chkconfig: - 85 15
# description: Redis is a persistent key-value database
# processname: redis-server
# config: /usr/local/redis/etc/redis.conf
# config: /etc/sysconfig/redis
# pidfile: /usr/local/redis/var/redis-server.pid
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0
redis="/usr/local/redis/bin/redis-server"
prog=$(basename $redis)
REDIS_CONF_FILE="/usr/local/redis/etc/redis.conf"
[ -f /etc/sysconfig/redis ] && . /etc/sysconfig/redis
lockfile=/var/lock/subsys/redis-server
start() {
[ -x $redis ] || exit 5
[ -f $REDIS_CONF_FILE ] || exit 6
echo -n $"Starting $prog: "
daemon $redis $REDIS_CONF_FILE
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
return $retval
}
stop() {
echo -n $"Stopping $prog: "
killproc $prog
retval=$?
echo
[ $retval -eq 0 ] && rm -f $lockfile
return $retval
}
restart() {
stop
start
}
reload() {
echo -n $"Reloading $prog: "
killproc $redis -HUP
RETVAL=$?
echo
}
force_reload() {
restart
}
rh_status() {
status $prog
}
rh_status_q() {
rh_status >/dev/null 2>&1
}
case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
exit 2
esac然后给权限 chmod 777 /etc/init.d/redis-server
redis-sentinel脚本内容
vim /etc/init.d/redis-sentinel
#!/bin/bash
#
# redis-sentinel - this script starts and stops the redis-server sentinel daemon
#
# chkconfig: - 85 15
# description: Redis sentinel
# processname: redis-server
# config: /usr/local/redis/etc/sentinel.conf
# config: /etc/sysconfig/redis
# pidfile: /usr/local/redis/var/redis-sentinel.pid
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0
redis="/usr/local/redis/bin/redis-sentinel"
prog=$(basename $redis)
REDIS_CONF_FILE="/usr/local/redis/etc/sentinel.conf"
[ -f /etc/sysconfig/redis ] && . /etc/sysconfig/redis
lockfile=/var/lock/subsys/redis-sentinel
start() {
[ -x $redis ] || exit 5
[ -f $REDIS_CONF_FILE ] || exit 6
echo -n $"Starting $prog: "
daemon $redis $REDIS_CONF_FILE --sentinel
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
return $retval
}
stop() {
echo -n $"Stopping $prog: "
killproc $prog
retval=$?
echo
[ $retval -eq 0 ] && rm -f $lockfile
return $retval
}
restart() {
stop
start
}
reload() {
echo -n $"Reloading $prog: "
killproc $redis -HUP
RETVAL=$?
echo
}
force_reload() {
restart
}
rh_status() {
status $prog
}
rh_status_q() {
rh_status >/dev/null 2>&1
}
case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
exit 2
esac 配置redis.config
编辑redis-master主节点的redis.conf文件 mkdir -p /usr/local/redis/data/redis mv /usr/local/redis/etc/redis.conf /usr/local/redis/etc/redis.conf.bak vim /usr/local/redis/etc/redis.conf bind 0.0.0.0 daemonize yes pidfile "/usr/local/redis/var/redis-server.pid" port 6379 tcp-backlog 128 timeout 0 tcp-keepalive 0 loglevel notice logfile "/usr/local/redis/var/redis-server.log" databases 16 save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename dump.rdb dir "/usr/local/redis/data/redis" #masterauth "20180408" #master设置密码保护，即slave连接master时的密码 #requirepass "20180408" #设置Redis连接密码，如果配置了连接密码，客户端在连接Redis时需要通过AUTH <password>命令提供密码，默认关闭 slave-serve-stale-data yes slave-read-only yes repl-diskless-sync no repl-diskless-sync-delay 5 repl-disable-tcp-nodelay no slave-priority 100 appendonly yes #打开aof持久化 appendfilename "appendonly.aof" appendfsync everysec # 每秒一次aof写 no-appendfsync-on-rewrite no auto-aof-rewrite-percentage 100 auto-aof-rewrite-min-size 64mb aof-load-truncated yes lua-time-limit 5000 slowlog-log-slower-than 10000 slowlog-max-len 128 latency-monitor-threshold 0 notify-keyspace-events "" hash-max-ziplist-entries 512 hash-max-ziplist-value 64 list-max-ziplist-entries 512 list-max-ziplist-value 64 set-max-intset-entries 512 zset-max-ziplist-entries 128 zset-max-ziplist-value 64 hll-sparse-max-bytes 3000 activerehashing yes client-output-buffer-limit normal 0 0 0 client-output-buffer-limit slave 256mb 64mb 60 client-output-buffer-limit pubsub 32mb 8mb 60 hz 10 aof-rewrite-incremental-fsync yes
编辑redis-slave01和redis-slave02两个从节点的redis.conf文件 mkdir -p /usr/local/redis/data/redis mv /usr/local/redis/etc/redis.conf /usr/local/redis/etc/redis.conf.bak vim /usr/local/redis/etc/redis.conf bind 0.0.0.0 daemonize yes pidfile "/usr/local/redis/var/redis-server.pid" port 6379 tcp-backlog 128 timeout 0 tcp-keepalive 0 loglevel notice logfile "/usr/local/redis/var/redis-server.log" databases 16 save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename "dump.rdb" dir "/usr/local/redis/data/redis" #masterauth "20180408" #requirepass "20180408" replicaof 172.16.221.132 6379 #相对主redis配置，多添加了此行 replica-serve-stale-data yes replica-read-only yes #从节点只读，不能写入 repl-diskless-sync no repl-diskless-sync-delay 5 repl-disable-tcp-nodelay no replica-priority 100 appendonly yes appendfilename "appendonly.aof" appendfsync everysec no-appendfsync-on-rewrite no auto-aof-rewrite-percentage 100 auto-aof-rewrite-min-size 64mb aof-load-truncated yes lua-time-limit 5000 slowlog-log-slower-than 10000 slowlog-max-len 128 latency-monitor-threshold 0 notify-keyspace-events "" hash-max-ziplist-entries 512 hash-max-ziplist-value 64 list-max-ziplist-entries 512 list-max-ziplist-value 64 set-max-intset-entries 512 zset-max-ziplist-entries 128 zset-max-ziplist-value 64 hll-sparse-max-bytes 3000 activerehashing yes client-output-buffer-limit normal 0 0 0 client-output-buffer-limit replica 256mb 64mb 60 client-output-buffer-limit pubsub 32mb 8mb 60 hz 10 aof-rewrite-incremental-fsync yes
配置sentinel.conf（这个默认没有，需要自建）。三个节点的配置一样。
mkdir -p /usr/local/redis/data/sentinel vim /usr/local/redis/etc/sentinel.conf port 26379 pidfile "/usr/local/redis/var/redis-sentinel.pid" dir "/usr/local/redis/data/sentinel" daemonize yes protected-mode no logfile "/usr/local/redis/var/redis-sentinel.log" sentinel monitor redisMaster 192.168.10.202 6379 2 sentinel down-after-milliseconds redisMaster 10000 sentinel parallel-syncs redisMaster 1 sentinel failover-timeout redisMaster 60000
启动redis和sentinel（三个节点都要操作）
vim /etc/profile ....... export PATH=$PATH:/usr/local/redis/bin 然后执行 source /etc/profile 在三台服务器分别启动 /etc/init.d/redis-server start /etc/init.d/redis-sentinel start redis-cli -h 172.16.221.130 -p 6379 INFO|grep role
查看master节点
redis-cli -h 172.16.221.132 -p 6379 info Replication
如果看不到从redis的信息看看是否没有关闭防火墙
PHP连接redis集群 先连接redis-sentinel
<?php
//初始化redis对象
$redis = new Redis();
//连接sentinel服务 host为ip，port为端口
$host = '172.16.221.132';
$port = 26379;
$redis->connect($host, $port);
$master_name ='redisMaster';
//可能用到的部分命令，其他可以去官方文档查看
//获取主库列表及其状态信息
$result = $redis->rawCommand('SENTINEL', 'masters');
//print_r($result);exit;
//根据所配置的主库redis名称获取对应的信息
//master_name应该由运维告知（也可以由上一步的信息中获取）
$result = $redis->rawCommand('SENTINEL', 'master', $master_name);
//根据所配置的主库redis名称获取其对应从库列表及其信息
$result = $redis->rawCommand('SENTINEL', 'slaves', $master_name);
//print_r($result);exit;
//获取特定名称的redis主库地址
$result = $redis->rawCommand('SENTINEL', 'get-master-addr-by-name', $master_name);
//print_r($result);exit;
//这个方法可以将以上sentinel返回的信息解析为数组
function parseArrayResult(array $data)
{
$result = array();
$count = count($data);
for ($i = 0; $i < $count;) {
$record = $data[$i];
if (is_array($record)) {
$result[] = parseArrayResult($record);
$i++;
} else {
$result[$record] = $data[$i + 1];
$i += 2;
}
}
return $result;
}
//$result打印的是主redis的ip和端口
$redis->connect($result[0],$result[1]);
$datas = $redis->get('name');
print_r($datas); 
参考地址