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
...