redis集群部署

 

 

环境变量添加

vim /etc/profile.d/redis.sh

内容如下

export REDIS_HOME=/home/software/redis-5.0.4/src

export PATH=$REDIS_HOME:$PATH

刷新变量

source /etc/profile.d/redis.sh

 

集群部署

Master： 192.168.2.160

Slave:    192.168.2.161 和192.168.2.162

Sentinel:  192.168.2.161  ， 192.168.2.162和192.168.2.163

 

Master配置文件

bind 192.168.2.160

protected-mode yes

port 6379

tcp-backlog 511

timeout 0

tcp-keepalive 300

daemonize yes

supervised no

pidfile /var/run/redis-m6379.pid

loglevel notice

logfile "/home/software/redis-5.0.4/redis-m6379.log"

databases 16

always-show-logo yes

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename dump.rdb

dir /home/software/redis-5.0.4

replica-serve-stale-data yes

replica-read-only yes

repl-diskless-sync no

repl-diskless-sync-delay 5

repl-disable-tcp-nodelay no

replica-priority 100

lazyfree-lazy-eviction no

lazyfree-lazy-expire no

lazyfree-lazy-server-del no

replica-lazy-flush no

appendonly no

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

aof-use-rdb-preamble 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-size -2

list-compress-depth 0

set-max-intset-entries 512

zset-max-ziplist-entries 128

zset-max-ziplist-value 64

hll-sparse-max-bytes 3000

stream-node-max-bytes 4096

stream-node-max-entries 100

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

dynamic-hz yes

aof-rewrite-incremental-fsync yes

rdb-save-incremental-fsync yes

 

 

Slave配置

########从库##############

 

slaveof <masterip> <masterport>

#设置该数据库为其他数据库的从数据库

 

masterauth <master-password>

#主从复制中，设置连接master服务器的密码（前提master启用了认证）

 

slave-serve-stale-data yes

# 当从库同主库失去连接或者复制正在进行，从库有两种运行方式：

# 1) 如果slave-serve-stale-data设置为yes(默认设置)，从库会继续相应客户端的请求

# 2) 如果slave-serve-stale-data设置为no，除了INFO和SLAVOF命令之外的任何请求都会返回一个错误"SYNC with master in progress"

 

slave-priority 100

#当主库发生宕机时候，哨兵会选择优先级最高的一个称为主库，从库优先级配置默认100，数值越小优先级越高

 

slave-read-only yes

#从节点是否只读；默认yes只读，为了保持数据一致性，应保持默认

 

 

####主库##############

 

repl-disable-tcp-nodelay no

#在slave和master同步后（发送psync/sync），后续的同步是否设置成TCP_NODELAY假如设置成yes，则redis会合并小的TCP包从而节省带宽，但会增加同步延迟（40ms），造成master与slave数据不一致假如设置成no，则redis master会立即发送同步数据，没有延迟

#前者关注性能，后者关注一致性

 

repl-ping-slave-period 10

#从库会按照一个时间间隔向主库发送PING命令来判断主服务器是否在线，默认是10秒

 

repl-backlog-size 1mb

#复制积压缓冲区大小设置

 

repl-backlog-ttl 3600

#master没有slave一段时间会释放复制缓冲区的内存，repl-backlog-ttl用来设置该时间长度。单位为秒。

 

min-slaves-to-write 3

min-slaves-max-lag 10

#设置某个时间断内，如果从库数量小于该某个值则不允许主机进行写操作，以上参数表示10秒内如果主库的从节点小于3个，则主库不接受写请求，min-slaves-to-write 0代表关闭此功能。

 

 

Sentinel配置文件

bind 192.168.2.163

port 26379

daemonize yes

pidfile "/var/run/redis-sentinel.pid"

logfile "/home/software/redis-5.0.4/sentinel26379.log"

dir "/home/software/redis-5.0.4"

sentinel myid 5464a132aac7f43773d311cf78c21312c0c45ae8

sentinel deny-scripts-reconfig yes

sentinel monitor mymaster 192.168.2.160 6379 2

sentinel config-epoch mymaster 0

sentinel leader-epoch mymaster 0

protected-mode no

sentinel known-replica mymaster 192.168.2.162 6379

sentinel known-replica mymaster 192.168.2.161 6379

sentinel current-epoch 0

 

 

 

加入开机启动：vim /etc/rc.d/init.d/redis

Redis主从启动如下内容：

#!/bin/sh

#chkconfig: 2345 55 25

#

# Simple Redis init.d script conceived to work on Linux systems

# as it does use of the /proc filesystem.

 

### BEGIN INIT INFO

# Provides:     redis_6379

# Default-Start:        2 3 4 5

# Default-Stop:         0 1 6

# Short-Description:    Redis data structure server

# Description:          Redis data structure server. See https://redis.io

### END INIT INFO

source /etc/init.d/functions

 

REDISPORT=6379

EXEC=/usr/bin/redis-server

CLIEXEC=/usr/bin/redis-cli

 

PIDFILE=/run/redis_${REDISPORT}.pid

CONF="/home/redis/conf/redis.conf"

 

AUTH=""

BIND_IP='192.168.2.211'     #配置你所在的主机ip

 

start(){

    if [ -f $PIDFILE ]

    then

            echo "$PIDFILE exists, process is already running or crashed"

    else

            echo "Starting Redis server..."

            $EXEC $CONF

    fi

 

    if [ "$?"="0" ]

    then  

        echo "Redis is running..."

    else

        echo "Redis not running !"

    fi

}

 

stop(){

    if [ ! -f $PIDFILE ]

    then

        echo "$PIDFILE does not exist, process is not running"

    else

        PID=$(cat $PIDFILE)

        echo "Stopping ..."

        #$CLIEXEC -h $BIND_IP -a $AUTH -p $REDISPORT shutdown

        $CLIEXEC -h $BIND_IP -p $REDISPORT shutdown

        while [ -x /proc/${PID} ]

        do

            echo "Waiting for Redis to shutdown ..."

            sleep 1

        done

        echo "Redis stopped."

    fi

}

 

status(){

    ps -ef | grep redis-server | grep -v grep >/dev/null 2>&1

 

    if [ $? -eq 0 ];then

 

        echo "redis server is running."

 

    else

        echo "redis server is stopped."

 

    fi

}

 

case "$1" in

    start)

        start

        ;;

    stop)

        stop

        ;;

    restart)

     stop

     start

    ;;

    status)

        status

        ;;

    *)

        echo "Please use start or stop as first argument"

        ;;

esac

 

 

 

哨兵模式的启动配置文件：vim /etc/rc.d/init.d/sentinel

#!/bin/sh

#chkconfig: 2345 55 25

#

# Simple Sentinel init.d script conceived to work on Linux systems

# as it does use of the /proc filesystem.

 

### BEGIN INIT INFO

# Provides:     redis_6379

# Default-Start:        2 3 4 5

# Default-Stop:         0 1 6

# Short-Description:    Sentinel data structure server

# Description:          Sentinel data structure server. See https://redis.io

### END INIT INFO

source /etc/init.d/functions

 

REDISPORT=26379

EXEC=/usr/bin/redis-sentinel

CLIEXEC=/usr/bin/redis-cli

 

PIDFILE=/run/redis-sentinel.pid

CONF="/home/redis/conf/sentinel.conf"

 

AUTH=""

BIND_IP='192.168.2.211'

 

start(){

    if [ -f $PIDFILE ]

    then

            echo "$PIDFILE exists, process is already running or crashed"

    else

            echo "Starting Sentinel server..."

            $EXEC $CONF

    fi

 

    if [ "$?"="0" ]

    then  

        echo "Sentinel is running..."

    else

        echo "Sentinel not running !"

    fi

}

 

stop(){

    if [ ! -f $PIDFILE ]

    then

        echo "$PIDFILE does not exist, process is not running"

    else

        PID=$(cat $PIDFILE)

        echo "Stopping ..."

        #$CLIEXEC -h $BIND_IP -a $AUTH -p $REDISPORT shutdown

        $CLIEXEC -h $BIND_IP -p $REDISPORT shutdown

        while [ -x /proc/${PID} ]

        do

            echo "Waiting for Sentinel to shutdown ..."

            sleep 1

        done

        echo "Sentinel stopped."

    fi

}

 

status(){

    ps -ef | grep redis-sentinel | grep -v grep >/dev/null 2>&1

 

    if [ $? -eq 0 ];then

 

        echo "Sentinel server is running."

 

    else

        echo "Sentinel server is stopped."

 

    fi

}

 

case "$1" in

    start)

        start

        ;;

    stop)

        stop

        ;;

    restart)

     stop

     start

    ;;

    status)

        status

        ;;

    *)

        echo "Please use start or stop as first argument"

        ;;

esac

 

 

加入开机启动：

chmod +x redis

chmod +x sentinel

chkconfig  --add redis

chkconfig  --add sentinel