CentOS7安装Redis集群+开机自启

不念不忘少年蓝@ 2022-01-14 09:07 439阅读 0赞

## 1、安装步骤 ##

### 1）下载并解压 ###

cd /usr/local/
    wget http://download.redis.io/releases/redis-3.2.1.tar.gz
    tar -zxvf /redis-3.2.1.tar.gz

### 2）测试make redis ###

cd redis-3.2.1
    make test
    ##可能会报错：You need tcl 8.5 or newer in order to run the Redis test
    ##安装tcl
    yum -y install tcl

出现绿色成功提示

### 3）安装 ###

[root@localhost redis-3.2.1]# make && make install
    cd src && make all
    make[1]: 进入目录“/usr/local/redis-3.2.1/src”
        INSTALL redis-sentinel
        CC redis-cli.o
        LINK redis-cli
        CC redis-benchmark.o
        LINK redis-benchmark
        INSTALL redis-check-rdb
    
    Hint: It's a good idea to run 'make test' ;)
    
    make[1]: 离开目录“/usr/local/redis-3.2.1/src”
    cd src && make install
    make[1]: 进入目录“/usr/local/redis-3.2.1/src”
    
    Hint: It's a good idea to run 'make test' ;)
    
        INSTALL install
        INSTALL install
        INSTALL install
        INSTALL install
        INSTALL install
    make[1]: 离开目录“/usr/local/redis-3.2.1/src”

应该算是成功了

### 4）更改配置 ###

[root@localhost local]# cd /usr/local
    ##创建集群目录
    [root@localhost local]# mkdir redis_cluster
    [root@localhost local]# cd redis_cluster
    ##创建三个端口（节点）
    [root@localhost redis_cluster]# mkdir 7000 7001 7002
    ##配置复制到各个节点
    [root@localhost redis_cluster]# cp /usr/local/redis-3.2.1/redis.conf ./7000
    [root@localhost redis_cluster]# cp /usr/local/redis-3.2.1/redis.conf ./7001
    [root@localhost redis_cluster]# cp /usr/local/redis-3.2.1/redis.conf ./7002

更新相关配置

[root@localhost redis_cluster]# vi ./7000/redis.conf
    [root@localhost redis_cluster]# vi ./7001/redis.conf
    [root@localhost redis_cluster]# vi ./7002/redis.conf

修改项目，其中7000分别改成不同的端口号

daemonize    yes                          //redis后台运行
    pidfile  /var/run/redis_7000.pid          //pidfile文件对应7000,7002,7003
    port  7000                                //端口7000,7002,7003
    cluster-enabled  yes                      //开启集群  把注释#去掉
    cluster-config-file  nodes_7000.conf      //集群的配置  配置文件首次启动自动生成 7000,7001,7002
    cluster-node-timeout  5000                //请求超时  设置5秒够了
    appendonly  yes                           //aof日志开启  有需要就开启，它会每次写操作都记录一条日志

### 5）启动节点 ###

[root@localhost local]# redis-server ./redis_cluster/7000/redis.conf
    [root@localhost local]# redis-server ./redis_cluster/7001/redis.conf
    [root@localhost local]# redis-server ./redis_cluster/7002/redis.conf

### 6）安装另一台redis ###

在进行make test时出现新问题：

\[exception\]: Executing test client: NOREPLICAS Not enough good slaves to write…  
NOREPLICAS Not enough good slaves to write.

修改配置：

[root@localhost redis-3.2.1]# vi ./tests/integration/replication-2.tcl

\-1000 -------------------------------> -10000

make & make install，安装成功

重复4）~5），注意不同的端口号

### 7）查看redis服务是否启动 ###

ps -ef | grep redis   #查看是否启动成功
    netstat -tnlp | grep redis #可以看到redis监听端口

### 8）创建集群 ###

①安装ruby【坑】

官方提供了一个工具：redis-trib.rb(/usr/local/redis-3.2.1/src/redis-trib.rb) ，是用ruby写的一个程序，所以我们还得安装ruby

yum -y install ruby ruby-devel rubygems rpm-build

再用 gem 这个命令来安装 redis接口 gem是ruby的一个工具包.

##gem install redis   
    ##上面报错，redis requires Ruby version >= 2.2.2问题；
    ##Centos默认支持ruby到2.0.0，可gem 安装redis需要最低是2.2.2

然后需要升级Ruby，又需要安装ruby的版本管理器：rvm

#执行curl -L get.rvm.io | bash -s stable
    #结果又出现公钥问题gpg: 无法检查签名：没有公钥
    #按照提示执行：
    gpg2 --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462                                                     A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
    #再执行：
    curl -L get.rvm.io | bash -s stable
    #更新
    source /usr/local/rvm/scripts/rvm

安装ruby新版

##安装一个ruby版本
    rvm install 2.4.1
    ##使用一个ruby版本
    rvm use 2.4.1
    ##设置默认版本
    rvm use 2.4.1 --default
    ##卸载已知版本
    rvm remove 2.0.0
    ##查看ruby版本，安装redis
    ruby --version

安装集群redis

gem install redis

另一台主机安装rubby

②关闭两台虚机的防火墙

systemctl stop firewalld.service
    systemctl disable firewalld.service
    systemctl mask firewalld.service

③创建集群

##/usr/local/redis-3.2.1/src/redis-trib.rb  create  --replicas  1  192.168.73.136:7000 192.168.73.136:7001  192.168.73.136:7002 192.168.73.137:7003  192.168.73.137:7004  192.168.73.137:7005
    ##报错：[ERR] Sorry, can't connect to node 192.168.X.X

修改700\*的redis.conf

##修改这句
    bind 127.0.0.1
    ==》
    bind 192.168.73.XXX

重启redis服务，需要注意的是原来127.0.0.1的服务还在，要kill掉

[root@localhost redis_cluster]# ps -ef|grep redis
    root       9421      1  0 14:46 ?        00:00:11 redis-server 127.0.0.1:7000 [cluster]
    root       9425      1  0 14:46 ?        00:00:11 redis-server 127.0.0.1:7001 [cluster]
    root       9429      1  0 14:46 ?        00:00:11 redis-server 127.0.0.1:7002 [cluster]
    root      15997      1  0 16:57 ?        00:00:00 redis-server 192.168.73.136:7000 [cluster]
    root      16001      1  0 16:57 ?        00:00:00 redis-server 192.168.73.136:7001 [cluster]
    root      16005      1  0 16:57 ?        00:00:00 redis-server 192.168.73.136:7002 [cluster]
    root      16013   9521  0 16:59 pts/1    00:00:00 grep --color=auto redis
    [root@localhost redis_cluster]# kill -9 9421
    [root@localhost redis_cluster]# kill -9 9425
    [root@localhost redis_cluster]# kill -9 9429
    [root@localhost redis_cluster]# ps -ef|grep redis
    root      15997      1  0 16:57 ?        00:00:00 redis-server 192.168.73.136:7000 [cluster]
    root      16001      1  0 16:57 ?        00:00:00 redis-server 192.168.73.136:7001 [cluster]
    root      16005      1  0 16:57 ?        00:00:00 redis-server 192.168.73.136:7002 [cluster]
    root      16016   9521  0 16:59 pts/1    00:00:00 grep --color=auto redis

用客户端telnet 700\*，可以试一下没问题就可以了，最终创建集群完成

[root@localhost redis_cluster]# /usr/local/redis-3.2.1/src/redis-trib.rb  create  --replicas  1  192.168.73.136:7000 192.168.73.136:7001  192.168.73.136:7002 192.168.73.137:7003  192.168.73.137:7004  192.168.73.137:7005
    >>> Creating cluster
    >>> Performing hash slots allocation on 6 nodes...
    Using 3 masters:
    192.168.73.136:7000
    192.168.73.137:7003
    192.168.73.136:7001
    Adding replica 192.168.73.137:7004 to 192.168.73.136:7000
    Adding replica 192.168.73.136:7002 to 192.168.73.137:7003
    Adding replica 192.168.73.137:7005 to 192.168.73.136:7001
    M: eddd675e5e36b51b1c09d23d012bfa9b15928eac 192.168.73.136:7000
       slots:0-5460 (5461 slots) master
    M: 1ab32bd763be60eaf8d8e2e40a528b33391feb08 192.168.73.136:7001
       slots:10923-16383 (5461 slots) master
    S: 74458981d134cbf9e6c949e72fac3aa26494c058 192.168.73.136:7002
       replicates 2796a20e01a0045d7e17372cbeddbf09234f533d
    M: 2796a20e01a0045d7e17372cbeddbf09234f533d 192.168.73.137:7003
       slots:5461-10922 (5462 slots) master
    S: 201833a42528e414fb5fc38421d5683c072fe270 192.168.73.137:7004
       replicates eddd675e5e36b51b1c09d23d012bfa9b15928eac
    S: c3b72ba014d20cfd1bf3ce565a34670611da0943 192.168.73.137:7005
       replicates 1ab32bd763be60eaf8d8e2e40a528b33391feb08
    Can I set the above configuration? (type 'yes' to accept): yes
    >>> Nodes configuration updated
    >>> Assign a different config epoch to each node
    >>> Sending CLUSTER MEET messages to join the cluster
    Waiting for the cluster to join...
    >>> Performing Cluster Check (using node 192.168.73.136:7000)
    M: eddd675e5e36b51b1c09d23d012bfa9b15928eac 192.168.73.136:7000
       slots:0-5460 (5461 slots) master
    M: 1ab32bd763be60eaf8d8e2e40a528b33391feb08 192.168.73.136:7001
       slots:10923-16383 (5461 slots) master
    M: 74458981d134cbf9e6c949e72fac3aa26494c058 192.168.73.136:7002
       slots: (0 slots) master
       replicates 2796a20e01a0045d7e17372cbeddbf09234f533d
    M: 2796a20e01a0045d7e17372cbeddbf09234f533d 192.168.73.137:7003
       slots:5461-10922 (5462 slots) master
    M: 201833a42528e414fb5fc38421d5683c072fe270 192.168.73.137:7004
       slots: (0 slots) master
       replicates eddd675e5e36b51b1c09d23d012bfa9b15928eac
    M: c3b72ba014d20cfd1bf3ce565a34670611da0943 192.168.73.137:7005
       slots: (0 slots) master
       replicates 1ab32bd763be60eaf8d8e2e40a528b33391feb08
    [OK] All nodes agree about slots configuration.
    >>> Check for open slots...
    >>> Check slots coverage...
    [OK] All 16384 slots covered.
    [root@localhost redis_cluster]#

### 9）测试 ###

redis-cli -h 192.168.73.136 -c -p 7002

Set 数据：k1 = helloworld

[root@localhost redis_cluster]# redis-cli -h 192.168.73.136 -c -p 7000
    192.168.73.136:7000> set k1 helloworld
    -> Redirected to slot [12706] located at 192.168.73.136:7001
    OK
    192.168.73.136:7001> exit

在任何节点都可以获取此数据

[root@localhost redis_cluster]# redis-cli -h 192.168.73.137 -c -p 7004
    192.168.73.137:7004> get k1
    -> Redirected to slot [12706] located at 192.168.73.136:7001
    "helloworld"
    192.168.73.136:7001>

### 10）redis开机自启 ###

vi /etc/init.d/redis

#!/bin/sh
    #
    # Simple Redis init.d script conceived to work on Linux systems
    # as it does use of the /proc filesystem.
    # chkconfig: 2345 80 90
    # description: Redis is a persistent key-value database
    
    REDISPORT0=7000
    REDISPORT1=7001
    REDISPORT2=7002
    EXEC=/usr/local/redis-3.2.1/src/redis-server
    CLIEXEC=/usr/local/redis-3.2.1/src/redis-cli
    
    case "$1" in
        start)
            CONF="/usr/local/redis_cluster/${REDISPORT0}/redis.conf"    
            echo "Starting Redis server on $REDISPORT0..."
            $EXEC $CONF &
    !
            CONF="/usr/local/redis_cluster/${REDISPORT1}/redis.conf"    
            echo "Starting Redis server on $REDISPORT1..."
            $EXEC $CONF &
    !
            CONF="/usr/local/redis_cluster/${REDISPORT2}/redis.conf"    
            echo "Starting Redis server on $REDISPORT2..."
            $EXEC $CONF &
    !
            ;;
    stop)
        es_pid=`ps -aux|grep redis|grep ${ REDISPORT0}|grep -v grep|awk '{print $2}'`
        kill -9 $es_pid
        echo "$REDISPORT0 stopped"
        es_pid=`ps -aux|grep redis|grep ${ REDISPORT1}|grep -v grep|awk '{print $2}'`
        kill -9 $es_pid
        echo "$REDISPORT1 stopped"
        es_pid=`ps -aux|grep redis|grep ${ REDISPORT2}|grep -v grep|awk '{print $2}'`
        kill -9 $es_pid
        echo "$REDISPORT2 stopped"
        ;;         
    *)
        echo "start|stop"
        ;;
    esac
    
    exit $?

保存退出，添加执行权限

chmod +x /etc/init.d/redis

加入开机启动服务

chkconfig --add redis