CentOS7 多节点部署redis（redis4.0.9集群

灰太狼 2022-05-23 01:44 295阅读 0赞

# 生产redis集群解决方案 #

*  参考链接：参考笔者之前写到一遍文章：
 *  [https://blog.csdn.net/wh211212/article/details/52817923][https_blog.csdn.net_wh211212_article_details_52817923]

> 实验背景，业务上需要使用redis集群

*  环境CentOS7：

<table> 
 <thead> 
  <tr> 
   <th>Hostname</th> 
   <th align="center">Role</th> 
   <th align="right">IP</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>redis1</td> 
   <td align="center">redis:7000 7003</td> 
   <td align="right">192.168.0.117</td> 
  </tr> 
  <tr> 
   <td>redis2</td> 
   <td align="center">redis:7001 7004</td> 
   <td align="right">192.168.0.118</td> 
  </tr> 
  <tr> 
   <td>redis3</td> 
   <td align="center">redis:7002 7005</td> 
   <td align="right">192.168.0.119</td> 
  </tr> 
 </tbody> 
</table>

\- 首先在三个redis节点上安装并启动至少6个redis实例

## 编译当前最新版本redis ##

*  安装依赖，CentOS7最小化安装

yum -y install epel-release && yum update -y
    sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
    
    yum install vim net-tools -y

*  为了方便设置三台redis节点ssh免密，同步hosts如下：

# redis1为例：
    # cat /etc/hosts
    127.0.0.1   localhost localhost.localdomain 
    
    # redis cluster
    192.168.0.117 redis1 ecs-117
    192.168.0.118 redis2 ecs-118
    192.168.0.119 redis3 ecs-119

*  redis1编译安装redis4.0.9

yum groupinstall "Development Tools" -y && yum install tcl wget -y
    
    wget http://download.redis.io/releases/redis-4.0.9.tar.gz
    tar zxvf redis-4.0.9.tar.gz -C /data/
    ln -s /data/redis-4.0.9/ /data/redis 
    cd /data/redis && make
    
    # 创建redis常用命令目录
    mkdir /data/redis/bin
    cp /data/redis/src/{ redis-benchmark,redis-check-aof,redis-check-rdb,redis-cli,redis-sentinel,redis-server,redis-shutdown,redis-trib.rb} /data/redis/bin/

*  笔者redis cluster目录结构，以redis1为例：

[root@redis1 data]# tree -d /data -L 1
    /data
    ├── redis -> /data/redis-4.0.9/
    ├── redis-4.0.9
    └── redis-cluster
    
    # tree -d /data/redis-cluster/
    /data/redis-cluster/
    ├── conf
    ├── nodes  # 存放redis 集群节点的配置文件
    └── scripts # redis 集群维护脚本
    
    # conf存放redis实例配置文件：7000.conf、7003.conf

*  脚本具体内容

[root@redis1 redis-cluster]# tree scripts/
    scripts/
    ├── bgrewriteaof.sh
    ├── redis-7000.sh
    └── redis-7003.sh
    
    0 directories, 3 files
    [root@redis1 redis-cluster]# cat scripts/bgrewriteaof.sh 
    #!/bin/bash
    #############################################
    # Functions: start & stop redis cluster node
    # ChangeLog:
    # 2018-05-30 shaonbean@qq.com initial
    ############################################
    # set -x #DEBUG
    
    REDIS_BIN_DIR="/data/redis/bin"
    REDIS_CLUSTER_DIR="/data/redis-cluster"
    REDIS_CLI="$REDIS_BIN_DIR/redis-cli"
    REDIS_SERVER="$REDIS_BIN_DIR/redis-server"
    
    PORTLIST=(7000 7003)
    
    bgrewriteaof() {
    
    for REDIS_PORT in ${PORTLIST[@]};
        do
        REDIS_NAME="redis-$REDIS_PORT"
        REDIS_CONFIG="/data/redis-cluster/conf/$REDIS_PORT.conf"
        REDIS_PASS="Aniuredis123"
        echo -n $"Rewriteaof $REDIS_NAME: "
        $REDIS_CLI -p $REDIS_PORT -a $REDIS_PASS BGREWRITEAOF
        retval=$?
        [ $retval -eq 0 ] && echo " $REDIS_NAME bgrewriteaof succeed!"  
        done
    }
    
    bgrewriteaof  
    
    # 定时进行aof重写
    
    [root@redis1 redis-cluster]# cat scripts/redis-7000.sh # redis实例启动脚本
    #!/bin/bash
    #############################################
    # Functions: start & stop redis cluster node
    # ChangeLog:
    # 2018-05-30 shaonbean@qq.com initial
    ############################################
    # set -x #DEBUG
    
    REDIS_BIN_DIR="/data/redis/bin"
    REDIS_CLUSTER_DIR="/data/redis-cluster"
    REDIS_CLI="$REDIS_BIN_DIR/redis-cli"
    REDIS_SERVER="$REDIS_BIN_DIR/redis-server"
    
    REDIS_USER="root"
    REDIS_PORT=7000
    REDIS_NAME="redis-$REDIS_PORT"
    REDIS_CONFIG="/data/redis-cluster/conf/$REDIS_PORT.conf"
    REDIS_PASS="Aniuredis123"
    
    start() {
        [ -f $REDIS_CONFIG ] || exit 6
        [ -x $REDIS_SERVER ] || exit 5
        echo -n $"Starting $REDIS_NAME: "
        $REDIS_SERVER $REDIS_CONFIG
        retval=$?
        [ $retval -eq 0 ] && echo " $REDIS_NAME start succeed!"
    }
    
    stop() {
        echo -n $"Stopping $REDIS_NAME: "
        $REDIS_CLI -p $REDIS_PORT -a $REDIS_PASS shutdown
        retval=$?
        [ $retval -eq 0 ] && echo " $REDIS_NAME stop succeed!"    
    }
    
    restart() {
        stop
        start
    }
    
    case "$1" in
        start)
            $1
            ;;
        stop)
            $1
            ;;
        restart)
            $1
            ;;
        *)
            echo $"Usage: $0 {start|stop|restart}"
            exit 2
    esac
    exit $?

*  7000.conf

[root@redis1 conf]# cat 7000.conf 
    bind 0.0.0.0
    protected-mode yes
    port 7000
    tcp-backlog 511
    timeout 0
    tcp-keepalive 300
    daemonize yes
    supervised no
    pidfile /var/run/redis/redis_7000.pid
    loglevel notice
    logfile /var/log/redis/redis-7000.log
    databases 16
    always-show-logo yes save "" stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename dump_7000.rdb dir /var/lib/redis 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 masterauth Aniuredis123 requirepass Aniuredis123 rename-command FLUSHALL "" #rename-command CONFIG "" maxclients 10000 maxmemory 4gb maxmemory-policy allkeys-lru maxmemory-samples 5 lazyfree-lazy-eviction no lazyfree-lazy-expire no lazyfree-lazy-server-del no slave-lazy-flush no appendonly yes appendfilename "appendonly_7000.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 no lua-time-limit 5000 # cluster config cluster-enabled yes cluster-config-file /data/redis-cluster/nodes/nodes-7000.conf cluster-node-timeout 5000 cluster-slave-validity-factor 10 cluster-migration-barrier 1 cluster-require-full-coverage yes cluster-slave-no-failover no 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 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

## 配置设置 ##

*  安装ruby环境

yum --enablerepo=centos-sclo-rh -y install rh-ruby24
    scl enable rh-ruby24 bash # 启用ruby环境变量
    
    # 写入到环境变量
    vi /etc/profile.d/rh-ruby24.sh
    #!/bin/bash
    source /opt/rh/rh-ruby24/enable
    export X_SCLS="`scl enable rh-ruby24 'echo $X_SCLS'`"

*  创建集群安装依赖

# gem install redis
    Successfully installed redis-4.0.1
    Parsing documentation for redis-4.0.1
    Done installing documentation for redis after 2 seconds
    1 gem installed

*  以redis1为例：

[root@redis1 ~]# /data/redis/bin/redis-trib.rb create --replicas 1 192.168.0.117:7000 192.168.0.118:7001 192.168.0.119:7002 192.168.0.117:7003 192.168.0.118:7004 192.168.0.119:7005 >>> Creating cluster >>> Performing hash slots allocation on 6 nodes... Using 3 masters: 192.168.0.117:7000 192.168.0.118:7001 192.168.0.119:7002 Adding replica 192.168.0.118:7004 to 192.168.0.117:7000 Adding replica 192.168.0.119:7005 to 192.168.0.118:7001 Adding replica 192.168.0.117:7003 to 192.168.0.119:7002 M: 1ea6b06582a23a1c73d06bc1aa32c3f4d8edcb24 192.168.0.117:7000 slots:0-5460 (5461 slots) master M: 2da83fad766d22198f064b31524d7e757af63a04 192.168.0.118:7001 slots:5461-10922 (5462 slots) master M: 77aa1ba8353e1dc303c1f3f2a553f82777aad5d6 192.168.0.119:7002 slots:10923-16383 (5461 slots) master S: 76feb9dfb7963a740e697bc9ecbdf4d18d1cdbb4 192.168.0.117:7003 replicates 77aa1ba8353e1dc303c1f3f2a553f82777aad5d6 S: 769eebd4bde8bbc58543585021bc34059d50ba23 192.168.0.118:7004 replicates 1ea6b06582a23a1c73d06bc1aa32c3f4d8edcb24 S: 6f2b369304597814af228b32c9c384581a34b900 192.168.0.119:7005 replicates 2da83fad766d22198f064b31524d7e757af63a04 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 192.168.0.117:7000) M: 1ea6b06582a23a1c73d06bc1aa32c3f4d8edcb24 192.168.0.117:7000 slots:0-5460 (5461 slots) master 1 additional replica(s) S: 76feb9dfb7963a740e697bc9ecbdf4d18d1cdbb4 192.168.0.117:7003 slots: (0 slots) slave replicates 77aa1ba8353e1dc303c1f3f2a553f82777aad5d6 M: 2da83fad766d22198f064b31524d7e757af63a04 192.168.0.118:7001 slots:5461-10922 (5462 slots) master 1 additional replica(s) M: 77aa1ba8353e1dc303c1f3f2a553f82777aad5d6 192.168.0.119:7002 slots:10923-16383 (5461 slots) master 1 additional replica(s) S: 769eebd4bde8bbc58543585021bc34059d50ba23 192.168.0.118:7004 slots: (0 slots) slave replicates 1ea6b06582a23a1c73d06bc1aa32c3f4d8edcb24 S: 6f2b369304597814af228b32c9c384581a34b900 192.168.0.119:7005 slots: (0 slots) slave replicates 2da83fad766d22198f064b31524d7e757af63a04 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.

## redis集群使用密码设置 ##

*  配置文件写入：

masterauth Aniuredis123 
    requirepass Aniuredis123

*  2、设置密码之后如果需要使用redis-trib.rb的各种命令,报错解决：

# 解决办法：
    [root@redis1 redis]# find / -name client.rb
    /opt/rh/rh-ruby24/root/usr/local/share/gems/gems/redis-4.0.1/lib/redis/client.rb
    
    class Client
        DEFAULTS = {
          :url => lambda { ENV["REDIS_URL"] },
          :scheme => "redis",
          :host => "127.0.0.1",
          :port => 6379,
          :path => nil,
          :timeout => 5.0,
          :password => "passwd123",
          :db => 0,
          :driver => nil,
          :id => nil,
          :tcp_keepalive => 0,
          :reconnect_attempts => 1,
          :inherit_socket => false
        }

> 注意：client.rb路径可以通过find命令查找：find / -name ‘client.rb’

## 笔者redis 集群安装总结 ##

# redis集群说明
    
    - redis1是Redis集群的一个节点A，上面运行两个redis实例，7000 7003
    - redis2是Redis集群的一个节点B，上面运行两个redis实例，7001 7004
    - redis3是Redis集群的一个节点C，上面运行两个redis实例，7002 7005
    
    
    - 假设集群包含A、B、C、A1、B1、C1六个节点
    
    A、B、C为主节点对应Redis实例：7000 7001 7002
    A1、B1、C1为从节点对应redis实例：7003 7004 7005
    
    # 建议交叉设置主从节点，对应关系为
    A > B1
    B > C1
    C > A1
    
    # 创建集群
    cd /data/redis/bin
    ./redis-trib.rb create --replicas 1 192.168.0.117:7000 192.168.0.118:7001 192.168.0.119:7002 192.168.0.117:7003 192.168.0.118:7004 192.168.0.119:7005
    
    # redis集群性能测试
    time /usr/local/redis/bin/redis-benchmark -h redis1 -p 7000 -a Aniuredis123 -c 200 -r 1000000 -n 2000000 -t get,set,lpush,lpop -P 16 -q
    time /usr/local/redis/bin/redis-benchmark -h redis2 -p 7001 -a Aniuredis123 -c 200 -r 1000000 -n 2000000 -t get,set,lpush,lpop -P 16 -q
    time /usr/local/redis/bin/redis-benchmark -h redis3 -p 7002 -a Aniuredis123 -c 200 -r 1000000 -n 2000000 -t get,set,lpush,lpop -P 16 -q
    
    # redis故障模拟
    
    
    # 参考redis.service设置redis实例开机自启动
    echo never > /sys/kernel/mm/transparent_hugepage/enabled
    echo 511 > /proc/sys/net/core/somaxconn

*  建议参考笔者的目录结构去部署，快下班啦，后面有需要注意的问题在总结

## redis 集群结合F5提供服务 ##

![这里写图片描述][70]

[https_blog.csdn.net_wh211212_article_details_52817923]: https://blog.csdn.net/wh211212/article/details/52817923
[70]: /images/20220523/92f80637d16c4ac0bc0c663815f0dd50.png