shell脚本创建redis集群

布满荆棘的人生 2023-02-17 02:39 14阅读 0赞

### 通过脚本创建redis集群  ###

**1. 拉取redis对应版本镜像**

docker pull redis:buster

**2. 创建脚本文件redis-node-start.sh，内容如下**

#!/bin/bash
    
    # 方法要定义在调用的前面，否则会因找不到该方法报错
    createRedisClusterContainer() {
      echo "Start to create redis cluster"
      for port in $(seq 7000 7005);
      do
        docker run -d -it \
          -p "${port}":"${port}" \
          -p 1"${port}":1"${port}" \
          -v /d/usr/local/etc/docker/redis-cluster/config/"${port}"/redis.conf:/usr/local/etc/redis/redis.conf \
          -v /d/usr/data/docker/redis-cluster/"${port}":/data \
          --name redis-"${port}" \
          --net redis-net \
          --sysctl net.core.somaxconn=1024 \
          redis:buster \
          redis-server /usr/local/etc/redis/redis.conf; \
      done
      echo "Successfully created redis cluster"
    }
    
    # 查看redis-net是否存在
    network=$(docker network ls | grep redis-net)
    if [ "$network" ]; then
      printf "Network named redis-net already exists：%s\n" "$network"
    else
      echo "Start creating a network called redis-net"
      docker network create redis-net
      echo "Successfully created redis-net"
    fi
    
    container_names=
    # 生成要检查的容器名
    for port in $(seq 7000 7005); do
      container_names=$container_names"|redis-${port}"
    done
    
    #echo "container_names: $container_names"
    
    # 去掉字符串首位的"|"，得到grep命令的匹配部分
    grep_part="${container_names:1}"
    #echo "grep_part: $grep_part"
    
    ## 拼接命令实现过滤，匹配容器信息，判断容器是否存在，如果容器不存在，直接创建
    info_list=$(docker ps -a | grep -E "$grep_part" | tee redis.txt)
    if test -z "$info_list"; then
      createRedisClusterContainer
      docker ps -a | grep -E "$grep_part"
      exit
    fi
    # 按2个以上空格进行全局替换
    < redis.txt sed 's/[[:space:]]\{2,\}/=/g' > tmpfile && mv tmpfile redis-sed.txt
    # 按"="好进行切分，获取匹配的容器名
    container_names_list=$(cut -d "=" -f7 redis-sed.txt)
    printf 'Redis cluster(%s)\n already exists, whether to rebuild after deletion? y/n:' "$container_names_list"
    read -r deleted_str
    if [ "$deleted_str" == "y" ]; then
      echo "Start to delete redis cluster"
      remove_redis_cluster="docker rm -f""${container_names//|/' '}"
      $remove_redis_cluster
      echo "Successfully deleted redis cluster"
      createRedisClusterContainer
      docker ps -a | grep -E "$grep_part"
    fi

**3. 切换到脚本文件所在路径，执行脚本文件**

./redis-node-start.sh
    或
    bash redis-node-start.sh

**3.1 集群已经存在可选择是否删除后重建**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70][]

**3.2 集群不存在的情况下自动创建**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70 1][]

**4. 上面版本只创建了容器没创建集群和分配主从节点，修改后完整版**

#!/bin/bash
    ##-----------------注：删除后重新创建集群，如果挂载数据的目录已存在数据，创建集群分配节点时会失败--------------
    
    # 方法要定义在调用的前面，否则会因找不到该方法报错
    createRedisClusterContainer() {
      # 设置绿色字体echo -e "\033[32m 绿色字 \033[0m"
      echo -e "\033[32m Start to create redis cluster container \033[0m"
      # 注：此处redis.conf文件如果不存在，会默认创建名为redis.conf的文件夹
      for port in $(seq 7000 7005); do
        docker run -d -it \
          -p "${port}":"${port}" \
          -p 1"${port}":1"${port}" \
          -v /d/usr/local/etc/docker/redis-cluster/config/"${port}"/redis.conf:/usr/local/etc/redis/redis.conf \
          -v /d/usr/data/docker/redis-cluster/"${port}":/data \
          --name redis-"${port}" \
          --net redis-net \
          --sysctl net.core.somaxconn=1024 \
          redis:buster \
          redis-server /usr/local/etc/redis/redis.conf
      done
      echo -e "\033[32m Successfully created redis cluster container \033[0m"
    }
    
    createRedisConfig() {
      echo -e "\033[32m Start writing to redis configuration file \033[0m"
      for port in $(seq 7000 7005); do
        # 注：windows下使用盘符路径，ubuntu下使用绝对路径
        if [ ! -d "d:/usr/local/etc/docker/redis-cluster/config/${port}" ]; then
          mkdir -p d:/usr/local/etc/docker/redis-cluster/config/"${port}"
        fi
        # 使用"<<-"，需要使用制表符Tab缩进
        # 使用<<-'EOF'或<<'EOF'，其中的内容都不能进行变量替换，使用<<EOF可以将外部变量传递到内容中
        # 注：此处若存在名为redis.conf的文件夹，则不再创建redis.conf文件
        tee d:/usr/local/etc/docker/redis-cluster/config/"${port}"/redis.conf <<EOF
    # redis后台运行
    daemonize no
    # redis运行的端口号
    port $port
    # 指定只接收来自该ip地址的请求
    bind 0.0.0.0
    # 启动集群模式
    cluster-enabled yes
    # 集群配置文件，在集群启动时，自动创建
    cluster-config-file nodes-$port.conf
    # 节点总线端口
    cluster-announce-bus-port 1$port
    # 集群超时时间，节点超时多久表示宕机了
    cluster-node-timeout 50000
    # 开启aof持久化模式，每次写操作请求都追加到appendonly.aof文件中
    appendonly yes
    EOF
      done
      echo -e "\033[32m Writing redis configuration file is complete \033[0m"
    }
    
    createClusterDistributionNodes() {
      echo -e "\033[32m Start creating a cluster \033[0m"
      host_ip="192.168.1.110"
      host_list=
      for port in $(seq 7000 7005); do
        host_list="$host_list$host_ip:${port} "
      done
      # 模拟键盘输入，自动选择yes，yes 命令可以无限重复产生其后面的字符”yes”，head 命令选择重复输入的次数
      redis_cli_order="yes yes | head -1 | redis-cli --cluster create ${host_list} --cluster-replicas 1"
      echo "$redis_cli_order"
      # 在容器redis-7000外部执行执行容器内的命令，进行主从节点分配
      #  docker exec -it redis-7000 bash -c "$redis_cli_order"
      docker exec -it "$redis_single_container_name" bash -c "$redis_cli_order"
      echo -e "\033[32m Successfully created cluster \033[0m"
    }
    
    createRedisCluster() {
      createRedisConfig
      createRedisClusterContainer
      createClusterDistributionNodes
    }
    
    # 查看redis-net是否存在
    net_work=$(docker network ls | grep redis-net)
    if [ "$net_work" ]; then
      #  黄色字：printf "Network named redis-net already exists：%s\n" "$net_work"
      echo -e "\033[33m Network named redis-net already exists：\n $net_work \033[0m"
    else
      echo -e "\033[32m Start creating a network called redis-net \033[0m"
      docker network create redis-net
      echo -e "\033[32m Successfully created redis-net \033[0m"
    fi
    
    container_names=
    # 声明一个单节点容器名，后续创建集群分配节点需要
    redis_single_container_name=
    # 生成要检查的容器名，并拼接"|"
    # 注意：此处的容器名createRedisClusterContainer()方法中生成的容器名要一致
    for port in $(seq 7000 7005); do
      container_names=$container_names"|redis-${port}"
      if test -z "$redis_single_container_name"; then
        redis_single_container_name=redis-${port}
      fi
    done
    
    #echo "container_names: $container_names"
    
    # 去掉字符串首位的"|"，得到grep命令的匹配部分
    grep_part="${container_names:1}"
    #echo "grep_part: $grep_part"
    
    ## 拼接命令实现过滤，匹配容器信息，判断容器是否存在，如果容器不存在，直接创建
    info_list=$(docker ps -a | grep -E "$grep_part" | tee redis.txt)
    if test -z "$info_list"; then
      createRedisCluster
      docker ps -a | grep -E "$grep_part"
      exit
    fi
    # 按2个以上空格进行全局替换
    sed <redis.txt 's/[[:space:]]\{2,\}/=/g' >tmpfile && mv tmpfile redis-sed.txt
    # 按"="好进行切分，获取匹配的容器名
    container_names_list=$(cut -d "=" -f7 redis-sed.txt)
    
    echo ""
    # 红色字：printf 'Redis cluster(%s)\n already exists, whether to rebuild after deletion? y/n:' "$container_names_list"
    echo -e "\033[31mRedis cluster
    ($container_names_list})
    already exists, whether to rebuild after deletion?
    注：删除后重新创建集群，如果挂载数据的目录已存在数据，创建集群分配节点时会失败 y/n:  \033[0m"
    
    read -r deleted_str
    if [ "$deleted_str" == "y" ]; then
      echo -e "\033[32m Start to delete redis cluster \033[0m"
      remove_redis_cluster="docker rm -f""${container_names//|/' '}"
      $remove_redis_cluster
      echo -e "\033[32m Successfully deleted redis cluster \033[0m"
      createRedisCluster
      docker ps -a | grep -E "$grep_part"
    fi

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200611101035771.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz,size_16,color_FFFFFF,t_70