docker-compose 搭建 Redis Sentinel 测试环境

本文介绍如何使用 docker-compose 快速搭建一个 Redis Sentinel 测试环境。其中 Redis 集群为 1 个 master 节点，2 个 slave 节点，Sentinel 为 3 个节点。请勿用于生产环境。

主机环境

系统 centos 7.5，ip 192.168.223.111，docker 1.13.1，docker-compose 1.23.2，redis 5.0.5。

创建配置文件

redis1.conf 内容：

bind 0.0.0.0

protected-mode yes

port 6379

tcp-backlog 511

timeout 0

tcp-keepalive 300

daemonize no

supervised no

pidfile /var/run/redis_6379.pid

loglevel notice

logfile ""

databases 16

always-show-logo yes

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename dump.rdb

dir ./

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

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

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

redis2.conf 内容：

bind 0.0.0.0

protected-mode yes

port 6380

tcp-backlog 511

timeout 0

tcp-keepalive 300

daemonize no

supervised no

pidfile /var/run/redis_6380.pid

loglevel notice

logfile ""

databases 16

always-show-logo yes

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename dump.rdb

dir ./

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

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

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

redis3.conf 内容：

bind 0.0.0.0

protected-mode yes

port 6381

tcp-backlog 511

timeout 0

tcp-keepalive 300

daemonize no

supervised no

pidfile /var/run/redis_6381.pid

loglevel notice

logfile ""

databases 16

always-show-logo yes

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename dump.rdb

dir ./

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

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

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

sentinel1.conf 内容：

port 26379

sentinel monitor mymaster 192.168.223.111 6379 2

sentinel down-after-milliseconds mymaster 10000

sentinel failover-timeout mymaster 180000

sentinel parallel-syncs mymaster 1

sentinel2.conf 内容：

port 26380

sentinel monitor mymaster 192.168.223.111 6379 2

sentinel down-after-milliseconds mymaster 10000

sentinel failover-timeout mymaster 180000

sentinel parallel-syncs mymaster 1

sentinel3.conf 内容：

port 26381

sentinel monitor mymaster 192.168.223.111 6379 2

sentinel down-after-milliseconds mymaster 10000

sentinel failover-timeout mymaster 180000

sentinel parallel-syncs mymaster 1

创建 docker-compose 文件

内容如下：

version: '3.0'

services:

  master:

    image: redis

    container_name: redis-master

    ports:

      - 6379:6379

    network_mode: host

    command: redis-server /usr/local/etc/redis/redis.conf

    volumes:

      - ./redis1.conf:/usr/local/etc/redis/redis.conf

  slave1:

    image: redis

    container_name: redis-slave-1

    ports:

      - 6380:6380

    network_mode: host

    command: redis-server /usr/local/etc/redis/redis.conf --slaveof 192.168.223.111 6379

    volumes:

      - ./redis2.conf:/usr/local/etc/redis/redis.conf

  slave2:

    image: redis

    container_name: redis-slave-2

    ports:

      - 6381:6381

    network_mode: host

    command: redis-server /usr/local/etc/redis/redis.conf --slaveof 192.168.223.111 6379

    volumes:

      - ./redis3.conf:/usr/local/etc/redis/redis.conf

  sentinel1:

    image: redis

    container_name: redis-sentinel-1

    ports:

      - 26379:26379

    network_mode: host

    command: redis-sentinel /usr/local/etc/redis/sentinel.conf

    volumes:

      - ./sentinel1.conf:/usr/local/etc/redis/sentinel.conf

  sentinel2:

    image: redis

    container_name: redis-sentinel-2

    ports:

      - 26380:26380

    network_mode: host

    command: redis-sentinel /usr/local/etc/redis/sentinel.conf

    volumes:

      - ./sentinel2.conf:/usr/local/etc/redis/sentinel.conf

  sentinel3:

    image: redis

    container_name: redis-sentinel-3

    ports:

      - 26381:26381

    network_mode: host

    command: redis-sentinel /usr/local/etc/redis/sentinel.conf

    volumes:

      - ./sentinel3.conf:/usr/local/etc/redis/sentinel.conf

因为要从其他地方连接测试环境，故使用 network_mode: host 参数直接使用宿主机网络。

启动、停止

启动所有服务

$ docker-compose up -d

停止某一服务

$ docker-compose stop master

启动某一服务

$ docker-compose start master

停止并删除所有服务

$ docker-compose down

验证

查看集群 master 与 slaves 信息

$ docker run -it --rm redis redis-cli -h 192.168.223.111 -p 26379

192.168.223.111:26379> sentinel master mymaster

 1) "name"

 2) "mymaster"

 3) "ip"

 4) "127.0.0.1"

 5) "port"

 6) "6379"

...

192.168.223.111:26379> sentinel slaves mymaster

1)  1) "name"

    2) "127.0.0.1:6380"

    3) "ip"

    4) "127.0.0.1"

    5) "port"

    6) "6380"

...

查看主机角色

$ docker run -it --rm redis redis-cli -h 192.168.223.111 -p 6379

192.168.223.111:6379> info replication

# Replication

role:master

connected_slaves:2

slave0:ip=127.0.0.1,port=6381,state=online,offset=324122,lag=0

slave1:ip=127.0.0.1,port=6380,state=online,offset=324122,lag=1

master_replid:94984a18426200e4f785b02ed46da6177a6bdd6f

master_replid2:0000000000000000000000000000000000000000

master_repl_offset:324388

second_repl_offset:-1

repl_backlog_active:1

repl_backlog_size:1048576

repl_backlog_first_byte_offset:1

repl_backlog_histlen:324388

...

$ docker run -it --rm redis redis-cli -h 192.168.223.111 -p 6380

192.168.223.111:6380> info replication

# Replication

role:slave

master_host:127.0.0.1

master_port:6379

master_link_status:up

master_last_io_seconds_ago:0

master_sync_in_progress:0

slave_repl_offset:346620

slave_priority:100

slave_read_only:1

connected_slaves:0

master_replid:94984a18426200e4f785b02ed46da6177a6bdd6f

master_replid2:0000000000000000000000000000000000000000

master_repl_offset:346620

second_repl_offset:-1

repl_backlog_active:1

repl_backlog_size:1048576

repl_backlog_first_byte_offset:1

repl_backlog_histlen:346620

...

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