docker swarm快速部署redis分布式集群的详细过程-编程学习网

之前尝试用swarm部署redis集群时网上看了很多帖子，发现大多数都是单机集群，也就是在一个服务器上启多个redis容器，然后进入其中一个容器执行redis搭建，经过研究，我实现了只需要通过docker-compose.yml文件和一个启动命令就完成redis分布式部署的方式，让其分别部署在不同机器上，并实现集群搭建。

环境准备

四台虚拟机

192.168.2.38（管理节点）
192.168.2.81（工作节点）
192.168.2.100（工作节点）
192.168.2.102（工作节点）

时间同步

每台机器都执行

yum install -y ntp
cat <<EOF>>/var/spool/cron/root
00 12 * * * /usr/sbin/ntpdate -u ntp1.aliyun.com && /usr/sbin/hwclock -w
EOF
##查看计划任务
crontab -l
##手动执行
/usr/sbin/ntpdate -u ntp1.aliyun.com && /usr/sbin/hwclock -w

Docker

安装Docker

curl -sSL https://get.daocloud.io/docker | sh

启动docker

sudo systemctl start docker

搭建Swarm集群

打开防火墙(Swarm需要)

管理节点打开2377

# manager
firewall-cmd --zone=public --add-port=2377/tcp --permanent

所有节点打开以下端口

# 所有node
firewall-cmd --zone=public --add-port=7946/tcp --permanent
firewall-cmd --zone=public --add-port=7946/udp --permanent
firewall-cmd --zone=public --add-port=4789/tcp --permanent
firewall-cmd --zone=public --add-port=4789/udp --permanent

所有节点重启防火墙

# 所有node
firewall-cmd --reload
systemctl restart docker

图个方便可以直接关闭防火墙

创建Swarm

docker swarm init --advertise-addr your_manager_ip

查看join-token

[root@manager ~]# docker swarm join-token worker
To add a worker to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-51b7t8whxn8j6mdjt5perjmec9u8qguxq8tern9nill737pra2-ejc5nw5f90oz6xldcbmrl2ztu 192.168.2.61:2377

[root@manager ~]#

加入Swarm

docker swarm join --token SWMTKN-1-
51b7t8whxn8j6mdjt5perjmec9u8qguxq8tern9nill737pra2-ejc5nw5f90oz6xldcbmrl2ztu
192.168.2.38:2377
#查看节点
docker node ls

服务约束

添加label

sudo docker node update --label-add redis1=true 管理节点名称
sudo docker node update --label-add redis2=true 工作节点名称
sudo docker node update --label-add redis3=true 工作节点名称
sudo docker node update --label-add redis4=true 工作节点名称

单机集群

弊端：容器都部署在一个机器上，机器挂了，就全挂了。

创建容器

Tips：这里可以写个脚本启动，因为这种方式不常用，这里就不写那个脚本了

docker create --name redis-node1 --net host -v /data/redis-data/node1:/data redis --cluster-enabled yes --cluster-config-file nodes-node-1.conf --port 6379
docker create --name redis-node2 --net host -v /data/redis-data/node2:/data redis --cluster-enabled yes --cluster-config-file nodes-node-2.conf --port 6380
docker create --name redis-node3 --net host -v /data/redis-data/node3:/data redis --cluster-enabled yes --cluster-config-file nodes-node-3.conf --port 6381
docker create --name redis-node4 --net host -v /data/redis-data/node4:/data redis --cluster-enabled yes --cluster-config-file nodes-node-4.conf --port 6382
docker create --name redis-node5 --net host -v /data/redis-data/node5:/data redis --cluster-enabled yes --cluster-config-file nodes-node-5.conf --port 6383
docker create --name redis-node6 --net host -v /data/redis-data/node6:/data redis --cluster-enabled yes --cluster-config-file nodes-node-6.conf --port 6384

启动容器

docker start redis-node1 redis-node2 redis-node3 redis-node4 redis-node5 redis-node6

进入容器启动集群

# 进入其中一个节点
docker exec -it redis-node1 /bin/bash
# 创建集群
redis-cli --cluster create 192.168.2.38:6379 192.168.2.38:6380 192.168.2.38:6381 192.168.2.38:6382 192.168.2.38:6383 192.168.2.38:6384 --cluster-replicas 1
# --cluster-replicas 1 一比一，一主一从

分布式集群

redis集群至少需要3个主节点，所以这里搭建三主三从的集群，由于只有4台机器，所以在脚本中把前三个节点放到一台机器上了。

部署

在swarm集群的Manager节点中创建

mkdir /root/redis-swarm
cd /root/redis-swarm
vi docker-compose.yml

docker compose.yml

说明：

前6个服务为redis节点，最后一个redis-start是用于创建集群，利用redis-cli客户端搭建集群，该服务搭建完redis集群后会自动停止运行。
redis-start需要等待前6个redis节点的执行完毕才能创建集群，因此需要用到脚本wait-for-it.sh
由于redis-cli --cluster create不支持网络别名，所以另写脚本redis-start.sh

使用这套脚本同样可以单机部署集群，只需要在启动时不使用swarm启动就可以了，然后把docker-compose.yml中的网络模式driver: overlay给注释掉即可

version: '3.7'
services:
  redis-node1:
    image: redis
    hostname: redis-node1
    ports:
      - 6379:6379
    networks:
      - redis-swarm
    volumes:
      - "node1:/data"
    command: redis-server --cluster-enabled yes --cluster-config-file nodes-node-1.conf
    deploy:
      mode: replicated
      replicas: 1
      resources:
        limits:
          # cpus: '0.001'
          memory: 5120M
        reservations:
          # cpus: '0.001'
          memory: 512M
      placement:
        constraints:
          - node.role==manager

  redis-node2:
    image: redis
    hostname: redis-node2
    ports:
      - 6380:6379
    networks:
      - redis-swarm
    volumes:
      - "node2:/data"
    command: redis-server --cluster-enabled yes --cluster-config-file nodes-node-2.conf
    deploy:
      mode: replicated
      replicas: 1
      resources:
        limits:
          # cpus: '0.001'
          memory: 5120M
        reservations:
          # cpus: '0.001'
          memory: 512M
      placement:
        constraints:
          - node.role==manager

  redis-node3:
    image: redis
    hostname: redis-node3
    ports:
      - 6381:6379
    networks:
      - redis-swarm
    volumes:
      - "node3:/data"
    command: redis-server --cluster-enabled yes --cluster-config-file nodes-node-3.conf
    deploy:
      mode: replicated
      resources:
        limits:
          # cpus: '0.001'
          memory: 5120M
        reservations:
          # cpus: '0.001'
          memory: 512M
      replicas: 1
      placement:
        constraints:
          - node.role==manager

  redis-node4:
    image: redis
    hostname: redis-node4
    ports:
      - 6382:6379
    networks:
      - redis-swarm
    volumes:
      - "node4:/data"
    command: redis-server --cluster-enabled yes --cluster-config-file nodes-node-4.conf
    deploy:
      mode: replicated
      replicas: 1
      resources:
        limits:
          # cpus: '0.001'
          memory: 5120M
        reservations:
          # cpus: '0.001'
          memory: 512M
      placement:
        constraints:
          - node.labels.redis2==true

  redis-node5:
    image: redis
    hostname: redis-node5
    ports:
      - 6383:6379
    networks:
      - redis-swarm
    volumes:
      - "node5:/data"
    command: redis-server --cluster-enabled yes --cluster-config-file nodes-node-5.conf
    deploy:
      mode: replicated
      replicas: 1
      resources:
        limits:
          # cpus: '0.001'
          memory: 5120M
        reservations:
          # cpus: '0.001'
          memory: 512M
      placement:
        constraints:
          - node.labels.redis3==true

  redis-node6:
    image: redis
    hostname: redis-node6
    ports:
      - 6384:6379
    networks:
      - redis-swarm
    volumes:
      - "node6:/data"
    command: redis-server --cluster-enabled yes --cluster-config-file nodes-node-6.conf
    deploy:
      mode: replicated
      replicas: 1
      resources:
        limits:
          # cpus: '0.001'
          memory: 5120M
        reservations:
          # cpus: '0.001'
          memory: 512M
      placement:
        constraints:
          - node.labels.redis4==true

  redis-start:
    image: redis
    hostname: redis-start
    networks:
      - redis-swarm
    volumes:
      - "$PWD/start:/redis-start"
    depends_on:
      - redis-node1
      - redis-node2
      - redis-node3
      - redis-node4
      - redis-node5
      - redis-node6
    command: /bin/bash -c "chmod 777 /redis-start/redis-start.sh && chmod 777 /redis-start/wait-for-it.sh && /redis-start/redis-start.sh"
    deploy:
      restart_policy:
        condition: on-failure
        delay: 5s
        max_attempts: 5
      placement:
        constraints:
          - node.role==manager

networks:
  redis-swarm:
    driver: overlay

volumes:
  node1:
  node2:
  node3:
  node4:
  node5:
  node6:

wait-for-it.sh

mkdir /root/redis-swarm/start
vi wait-for-it.sh
vi redis-start.sh

#!/usr/bin/env bash
#   Use this script to test if a given TCP host/port are available

cmdname=$(basename $0)

echoerr() { if [[ $QUIET -ne 1 ]]; then echo "$@" 1>&2; fi }

usage()
{
    cat << USAGE >&2
Usage:
    $cmdname host:port [-s] [-t timeout] [-- command args]
    -h HOST | --host=HOST       Host or IP under test
    -p PORT | --port=PORT       TCP port under test
                                Alternatively, you specify the host and port as host:port
    -s | --strict               Only execute subcommand if the test succeeds
    -q | --quiet                Don't output any status messages
    -t TIMEOUT | --timeout=TIMEOUT
                                Timeout in seconds, zero for no timeout
    -- COMMAND ARGS             Execute command with args after the test finishes
USAGE
    exit 1
}

wait_for()
{
    if [[ $TIMEOUT -gt 0 ]]; then
        echoerr "$cmdname: waiting $TIMEOUT seconds for $HOST:$PORT"
    else
        echoerr "$cmdname: waiting for $HOST:$PORT without a timeout"
    fi
    start_ts=$(date +%s)
    while :
    do
        (echo > /dev/tcp/$HOST/$PORT) >/dev/null 2>&1
        result=$?
        if [[ $result -eq 0 ]]; then
            end_ts=$(date +%s)
            echoerr "$cmdname: $HOST:$PORT is available after $((end_ts - start_ts)) seconds"
            break
        fi
        sleep 1
    done
    return $result
}

wait_for_wrapper()
{
    # In order to support SIGINT during timeout: http://unix.stackexchange.com/a/57692
    if [[ $QUIET -eq 1 ]]; then
        timeout $TIMEOUT $0 --quiet --child --host=$HOST --port=$PORT --timeout=$TIMEOUT &
    else
        timeout $TIMEOUT $0 --child --host=$HOST --port=$PORT --timeout=$TIMEOUT &
    fi
    PID=$!
    trap "kill -INT -$PID" INT
    wait $PID
    RESULT=$?
    if [[ $RESULT -ne 0 ]]; then
        echoerr "$cmdname: timeout occurred after waiting $TIMEOUT seconds for $HOST:$PORT"
    fi
    return $RESULT
}

# process arguments
while [[ $# -gt 0 ]]
do
    case "$1" in
        *:* )
        hostport=(${1//:/ })
        HOST=${hostport[0]}
        PORT=${hostport[1]}
        shift 1
        ;;
        --child)
        CHILD=1
        shift 1
        ;;
        -q | --quiet)
        QUIET=1
        shift 1
        ;;
        -s | --strict)
        STRICT=1
        shift 1
        ;;
        -h)
        HOST="$2"
        if [[ $HOST == "" ]]; then break; fi
        shift 2
        ;;
        --host=*)
        HOST="${1#*=}"
        shift 1
        ;;
        -p)
        PORT="$2"
        if [[ $PORT == "" ]]; then break; fi
        shift 2
        ;;
        --port=*)
        PORT="${1#*=}"
        shift 1
        ;;
        -t)
        TIMEOUT="$2"
        if [[ $TIMEOUT == "" ]]; then break; fi
        shift 2
        ;;
        --timeout=*)
        TIMEOUT="${1#*=}"
        shift 1
        ;;
        --)
        shift
        CLI="$@"
        break
        ;;
        --help)
        usage
        ;;
        *)
        echoerr "Unknown argument: $1"
        usage
        ;;
    esac
done

if [[ "$HOST" == "" || "$PORT" == "" ]]; then
    echoerr "Error: you need to provide a host and port to test."
    usage
fi

TIMEOUT=${TIMEOUT:-15}
STRICT=${STRICT:-0}
CHILD=${CHILD:-0}
QUIET=${QUIET:-0}

if [[ $CHILD -gt 0 ]]; then
    wait_for
    RESULT=$?
    exit $RESULT
else
    if [[ $TIMEOUT -gt 0 ]]; then
        wait_for_wrapper
        RESULT=$?
    else
        wait_for
        RESULT=$?
    fi
fi

if [[ $CLI != "" ]]; then
    if [[ $RESULT -ne 0 && $STRICT -eq 1 ]]; then
        echoerr "$cmdname: strict mode, refusing to execute subprocess"
        exit $RESULT
    fi
    exec $CLI
else
    exit $RESULT
fi

redis-start.sh

getent hosts xxx查看主机中/etc/hosts域名映射的IP

cd /redis-start/
bash wait-for-it.sh redis-node1:6379 --timeout=0
bash wait-for-it.sh redis-node2:6379 --timeout=0
bash wait-for-it.sh redis-node3:6379 --timeout=0
bash wait-for-it.sh redis-node4:6379 --timeout=0
bash wait-for-it.sh redis-node5:6379 --timeout=0
bash wait-for-it.sh redis-node6:6379 --timeout=0
echo 'redis-cluster begin'
echo 'yes' | redis-cli --cluster create --cluster-replicas 1 \
`getent hosts redis-node1 | awk '{ print $1 ":6379" }'` \
`getent hosts redis-node2 | awk '{ print $1 ":6379" }'` \
`getent hosts redis-node3 | awk '{ print $1 ":6379" }'` \
`getent hosts redis-node4 | awk '{ print $1 ":6379" }'` \
`getent hosts redis-node5 | awk '{ print $1 ":6379" }'` \
`getent hosts redis-node6 | awk '{ print $1 ":6379" }'`
echo 'redis-cluster end'

启动

目录结构

├── docker-compose.yml
└── start
    ├── redis-start.sh
    └── wait-for-it.sh

swarm管理节点执行

cd /root/redis-swarm
docker stack deploy -c docker-compose.yml redis_cluster

查看redis-start服务日志，如下即为启动成功

redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: waiting for redis-node1:6379 without a timeout
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: redis-node1:6379 is available after 18 seconds
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: waiting for redis-node2:6379 without a timeout
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: redis-node2:6379 is available after 13 seconds
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: waiting for redis-node3:6379 without a timeout
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: redis-node3:6379 is available after 0 seconds
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: waiting for redis-node4:6379 without a timeout
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: redis-node4:6379 is available after 0 seconds
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: waiting for redis-node5:6379 without a timeout
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: redis-node5:6379 is available after 0 seconds
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: waiting for redis-node6:6379 without a timeout
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | wait-for-it.sh: redis-node6:6379 is available after 0 seconds
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | redis-cluster begin
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | >>> Performing hash slots allocation on 12 nodes...
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Master[0] -> Slots 0 - 2730
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Master[1] -> Slots 2731 - 5460
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Master[2] -> Slots 5461 - 8191
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Master[3] -> Slots 8192 - 10922
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Master[4] -> Slots 10923 - 13652
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Master[5] -> Slots 13653 - 16383
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Adding replica 10.0.5.6:6379 to 10.0.5.17:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Adding replica 10.0.5.9:6379 to 10.0.5.16:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Adding replica 10.0.5.8:6379 to 10.0.5.18:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Adding replica 10.0.5.12:6379 to 10.0.5.19:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Adding replica 10.0.5.11:6379 to 10.0.5.3:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Adding replica 10.0.5.5:6379 to 10.0.5.2:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | M: 6ce90be6daabc0c700471d03deb3c6bd88c9f0e1 10.0.5.17:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots:[0-2730] (2731 slots) master
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | M: 6ce90be6daabc0c700471d03deb3c6bd88c9f0e1 10.0.5.16:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots:[2731-5460] (2730 slots) master
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | M: ea9b45ec64c08c17283239f8b8e5405b2d182428 10.0.5.18:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots:[5461-8191] (2731 slots) master
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | M: ea9b45ec64c08c17283239f8b8e5405b2d182428 10.0.5.19:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots:[8192-10922] (2731 slots) master
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | M: 935c177308232de05b5483776478020de51bc578 10.0.5.3:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots:[10923-13652] (2730 slots) master
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | M: 935c177308232de05b5483776478020de51bc578 10.0.5.2:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots:[13653-16383] (2731 slots) master
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | S: 1c99e42bcfb28a9fe72952d4e4cc5cd88aded0f9 10.0.5.5:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    replicates 935c177308232de05b5483776478020de51bc578
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | S: 1c99e42bcfb28a9fe72952d4e4cc5cd88aded0f9 10.0.5.6:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    replicates 6ce90be6daabc0c700471d03deb3c6bd88c9f0e1
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | S: 73cf232f232e83126f058cc01458df11146d8537 10.0.5.9:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    replicates 6ce90be6daabc0c700471d03deb3c6bd88c9f0e1
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | S: 73cf232f232e83126f058cc01458df11146d8537 10.0.5.8:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    replicates ea9b45ec64c08c17283239f8b8e5405b2d182428
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | S: ca3c50899d6deb04e296c542cd485791fb3e8922 10.0.5.12:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    replicates ea9b45ec64c08c17283239f8b8e5405b2d182428
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | S: ca3c50899d6deb04e296c542cd485791fb3e8922 10.0.5.11:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    replicates 935c177308232de05b5483776478020de51bc578
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Can I set the above configuration? (type 'yes' to accept): >>> Nodes configuration updated
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | >>> Assign a different config epoch to each node
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | >>> Sending CLUSTER MEET messages to join the cluster
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | Waiting for the cluster to join
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | .
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | >>> Performing Cluster Check (using node 10.0.5.17:6379)
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | M: 6ce90be6daabc0c700471d03deb3c6bd88c9f0e1 10.0.5.17:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots:[0-5460] (5461 slots) master
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    1 additional replica(s)
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | S: ca3c50899d6deb04e296c542cd485791fb3e8922 10.0.5.12:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots: (0 slots) slave
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    replicates 935c177308232de05b5483776478020de51bc578
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | M: ea9b45ec64c08c17283239f8b8e5405b2d182428 10.0.5.19:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots:[5461-10922] (5462 slots) master
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    1 additional replica(s)
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | M: 935c177308232de05b5483776478020de51bc578 10.0.5.3:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots:[10923-16383] (5461 slots) master
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    1 additional replica(s)
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | S: 1c99e42bcfb28a9fe72952d4e4cc5cd88aded0f9 10.0.5.6:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots: (0 slots) slave
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    replicates 6ce90be6daabc0c700471d03deb3c6bd88c9f0e1
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | S: 73cf232f232e83126f058cc01458df11146d8537 10.0.5.9:6379
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    slots: (0 slots) slave
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    |    replicates ea9b45ec64c08c17283239f8b8e5405b2d182428
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | [OK] All nodes agree about slots configuration.
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | >>> Check for open slots...
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | >>> Check slots coverage...
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | [OK] All 16384 slots covered.
redis-swarm_redis-start.1.6xawjqf5shfw@hyx-test3    | redis-cluster end

撤销部署

docker stack rm redis_cluster

如果需要重新部署集群，redis集群为了保证数据统一，需要清除数据卷。

# 每个节点都需要执行
docker volume prune

测试

进入其中一个节点容器，依次查看集群信息

docker exec -it xxx bash
redis-cli -c -h redis-node1 info

测试读写数据

测试其中一个主节点宕机，这里删除了主节点1，节点1对应的从节点是节点4，节点1宕机后节点4成为主节点

docker service rm redis-swarm_redis-node1
# 查看
root@redis-node2:/data# redis-cli -c -h redis-node1
Could not connect to Redis at redis-node1:6379: Name or service not known
not connected> 
root@redis-node2:/data# redis-cli -c -h redis-node4
redis-node4:6379> info

问题

redis-cli --cluster create redis-node1:6379 ...省略

在容器中使用redis-cli创建集群时，无法使用容器名创建，只能使用容器的ip，因为redis-cli对别名不支持

脚本下载+快速启动

链接: https://pan.baidu.com/s/18_YS9ng29e31Az_HBzBC1w?pwd=sp8w

提取码: sp8w

到此这篇关于docker swarm快速部署redis分布式集群的详细过程的文章就介绍到这了,更多相关docker swarm部署redis内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！

文章详情

docker swarm快速部署redis分布式集群的详细过程

目录

环境准备

时间同步

Docker

安装Docker

启动docker

搭建Swarm集群

打开防火墙(Swarm需要)

创建Swarm

加入Swarm

服务约束

单机集群

创建容器

启动容器

进入容器启动集群

分布式集群

部署

docker compose.yml

wait-for-it.sh

redis-start.sh

启动

目录结构

撤销部署

测试

问题

脚本下载+快速启动

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