CentOS7 部署 redis 5.0.6 集群

环境

• 操作系统: CentOS7.7，关闭 firewalld 和 selinux
• Redis: 5.0.6
• master 实例
  • 10.0.4.110:6371
  • 10.0.4.110:6372
  • 10.0.4.110:6373
• slave 实例
  • 10.0.4.111:6371
  • 10.0.4.111:6372
  • 10.0.4.111:6373

编译 redis server

• 在 CentOS7.7 测试服务器上下载、编译

  wget http://download.redis.io/releases/redis-5.0.6.tar.gz
  tar xzf redis-5.0.6.tar.gz
  cd redis-5.0.6
  make
  

• 抽取安装文件

  mkdir -p /opt/redis_cluster/{bin,conf}
  cp src/{redis-server,redis-cli,redis-benchmark} /opt/redis_cluster/bin/
  # redis-check-rdb 和 redis-check-aof 与 redis-server 校验值一致，无需复制
  

• 创建 /opt/redis_cluster/conf/redis.conf，常用配置如下

  bind 0.0.0.0
  protected-mode yes
  tcp-backlog 511
  timeout 3600
  tcp-keepalive 300
  daemonize no
  supervised no
  loglevel notice
  always-show-logo no
  save 900 1
  save 300 10
  save 60 10000
  stop-writes-on-bgsave-error yes
  rdbcompression yes
  rdbchecksum yes
  dbfilename dump.rdb
  #masterauth "123456"
  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
  #requirepass "123456"
  maxclients 10000
  maxmemory 4294967296
  maxmemory-policy volatile-lru
  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
  cluster-enabled yes
  cluster-node-timeout 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
  

• 创建 /opt/redis_cluster/redis@.service，配置如下

  [Unit]
  Description=Redis cluster -- node %i
  After=network.target
  
  [Service]
  ExecStartPre=/usr/bin/ls -d /var/lib/redis_cluster/%i
  ExecStart=/opt/redis_cluster/bin/redis-server /opt/redis_cluster/conf/redis.conf \
      --daemonize no \
      --port %i \
      --pidfile /var/run/redis_%i.pid \
      --logfile /var/log/redis_cluster/%i.log \
      --dir /var/lib/redis_cluster/%i \
      --cluster-config-file /var/lib/redis_cluster/%i/nodes.conf
  ExecStop=/opt/redis_cluster/bin/redis-cli -h 127.0.0.1 -p %i shutdown
  Restart=on-failure
  RestartSec=1
  
  [Install]
  WantedBy=multi-user.target
  

部署

• 把测试机的 /opt/redis_cluster 目录复制到 10.0.4.110 和 10.0.4.111 上

  scp -r /opt/redis_cluster 10.0.4.110:/opt/
  scp -r /opt/redis_cluster 10.0.4.111:/opt/
  

• 在 10.0.4.110 和 10.0.4.111 上都执行以下操作

  mv /opt/redis_cluster/redis@.service /usr/lib/systemd/system/
  systemctl daemon-reload
  mkdir -p /var/lib/redis_cluster/{6371..6373}
  mkdir -p /var/log/redis_cluster
  

• 在 10.0.4.110 和 10.0.4.111 上配置实例开机启动

  systemctl enable redis@6371
  systemctl enable redis@6372
  systemctl enable redis@6373
  

• 在 10.0.4.110 和 10.0.4.111 上启动全部实例

  systemctl start redis@6371
  systemctl start redis@6372
  systemctl start redis@6373
  

配置集群

• 在 10.0.4.110 或 10.0.4.111 上创建集群，指定三个 master 实例

  /opt/redis_cluster/bin/redis-cli \
      --cluster create 10.0.4.110:6371 10.0.4.110:6372 10.0.4.110:6373
  

• 输出如下图
  
• 同意配置，输入 "yes"，回车后输出如下图
  
• 查看集群当前实例

  /opt/redis_cluster/bin/redis-cli -p 6371 cluster nodes
  

• 输出如下图
  
• 添加 slave 实例 10.0.4.111:6371，同步 master 10.0.4.110:6371

  /opt/redis_cluster/bin/redis-cli \
      --cluster add-node 10.0.4.111:6371 10.0.4.110:6371 \
      --cluster-slave \
      --cluster-master-id 5be0edaf74d1eec50bbe675f9698397023a943b7
  # 上述命令中，10.0.4.111:6371 是待添加实例，10.0.4.110:6371 是已存在集群中的任一实例
  # --cluster-slave 指定添加 slave 实例
  # --cluster-master-id 指定 10.0.4.110:6371 的 id，即本次添加实例的 master
  

• 输出如下图
  
• 添加 slave 实例 10.0.4.111:6372，同步 master 10.0.4.110:6372

  /opt/redis_cluster/bin/redis-cli \
      --cluster add-node 10.0.4.111:6372 10.0.4.110:6371 \
      --cluster-slave \
      --cluster-master-id 96f2225fdd054d8a16b31726fd1eb0b66c612646
  

• 输出如下图
  
• 添加 slave 实例 10.0.4.111:6373，同步 master 10.0.4.110:6373

  /opt/redis_cluster/bin/redis-cli \
      --cluster add-node 10.0.4.111:6373 10.0.4.110:6371 \
      --cluster-slave \
      --cluster-master-id cd60c238e66c8b4a31355bee4610444a47acef86
  

• 输出如下图
  
• 查看集群当前实例

  /opt/redis_cluster/bin/redis-cli -p 6371 cluster nodes
  

• 输出如下图
  

参考

• redis 官网

来源：oschina

链接：https://my.oschina.net/colben/blog/3130997