本文参考:
https://www.cnblogs.com/boshen-hzb/p/10471665.html
文章中的redis集群没有设置密码,我们这里做一版带密码的
说明:
单节点,伪集群,1master,2slave,2哨兵的示例
1.拉取镜像:
docker pull registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis-sentinel:3
docker pull registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis:3
2.创建数据文件夹
mkdir -p /home/redis-sentinel-cluster/data/master
mkdir -p /home/redis-sentinel-cluster/data/slave1
mkdir -p /home/redis-sentinel-cluster/data/slave2
mkdir -p /home/redis-sentinel-cluster/data/sentinel-1
mkdir -p /home/redis-sentinel-cluster/data/sentinel-2
3.编辑配置文件
哨兵的配置文件:(这里跟参考文章中不同的是加入了auth-pass参数,用来连接带密码的redis集群)
其中sentinel auth-pass myredismaster redispassword的后两个参数分别为redis cluser name 和 password,一般项目在配置连接的时候会使用到这两个参数
vim /home/redis-sentinel-cluster/sentinel-1.conf
port 26379
dir "/data"
sentinel monitor myredismaster 192.168.2.104 16379 2
sentinel auth-pass myredismaster redispassword
sentinel down-after-milliseconds myredismaster 5000
sentinel failover-timeout myredismaster 5000
sentinel parallel-syncs myredismaster 1
第二个哨兵实例:
vim /home/redis-sentinel-cluster/sentinel-2.conf
port 26380
dir "/data"
sentinel monitor myredismaster 192.168.2.104 16379 2
sentinel auth-pass myredismaster redispassword
sentinel down-after-milliseconds myredismaster 5000
sentinel failover-timeout myredismaster 5000
sentinel parallel-syncs myredismaster 1
如果哨兵的实例启动报文件权限问题,把这两个配置文件权限设为777可以解决,建议提前先设置好权限再启动
1）monitor 指的是初始化的监控主切点，ip和端口，后面的数字2代表，必须2个sentinel才能判断主节点是否失败
2）down-after-milliseconds 指的是超过5000秒，且没有回复，则判定主节点不可达
3）failover-timeout 指的是故障转移时间
4）parallel-syncs 指的是故障转移到新的主节点时，从节点的复制节点数量
-
创建 /home/redis-sentinel-cluster/docker-compose.yml
(这里跟原文比,添加了--requirepass参数设置密码,slave还添加了--masterauth来与master通信)
version: '2.1' services: master: image: registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis:3 container_name: master restart: always network_mode: "host" volumes: - ./data/master:/data command: redis-server --port 16379 --requirepass redispassword slave1: image: registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis:3 container_name: slave1 restart: always network_mode: "host" volumes: - ./data/slave1:/data command: redis-server --port 16380 --slaveof 192.168.2.104 16379 --requirepass redispassword --masterauth redispassword slave2: image: registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis:3 container_name: slave2 restart: always network_mode: "host" volumes: - ./data/slave2:/data command: redis-server --port 16381 --slaveof 192.168.2.104 16379 --requirepass redispassword --masterauth redispassword sentinel-1: image: registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis-sentinel:3 container_name: sentinel-1 restart: always network_mode: "host" volumes: - ./sentinel-1.conf:/etc/redis/sentinel.conf - ./data/sentinel-1:/data sentinel-2: image: registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis-sentinel:3 container_name: sentinel-2 restart: always network_mode: "host" volumes: - ./sentinel-2.conf:/etc/redis/sentinel.conf - ./data/sentinel-2:/data
-
启动redis集群
cd /home/redis-sentinel-cluster docker-compose up -d
[root@localhost redis-sentinel-cluster]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
04a9cc388d19 registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis:3 "docker-entrypoint.s…" 20 minutes ago Up 16 minutes slave1
958aac29b019 registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis:3 "docker-entrypoint.s…" 20 minutes ago Up 16 minutes slave2
bb671925d543 registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis:3 "docker-entrypoint.s…" 36 minutes ago Up 16 minutes master
9f2ae4a38042 registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis-sentinel:3 "sentinel-entrypoint…" About an hour ago Up 16 minutes sentinel-2
d34ed9e217bd registry.cn-hangzhou.aliyuncs.com/boshen-ns/redis-sentinel:3 "sentinel-entrypoint…" About an hour ago Up 16 minutes sentinel-1
可以看到都起来了
查看哨兵的配置文件,会自动的抓取集群信息并修改配置文件:
[root@localhost redis-sentinel-cluster]# cat sentinel-1.conf
port 26379
dir "/data"
sentinel myid d0940e2c477e49e131f933e379623ed43fba8e8c
sentinel monitor myredismaster 192.168.2.104 16379 2
sentinel down-after-milliseconds myredismaster 5000
sentinel failover-timeout myredismaster 5000
sentinel auth-pass myredismaster redispassword
# Generated by CONFIG REWRITE
sentinel config-epoch myredismaster 0
sentinel leader-epoch myredismaster 0
sentinel known-slave myredismaster 192.168.2.104 16381
sentinel known-slave myredismaster 192.168.2.104 16380
sentinel known-sentinel myredismaster 192.168.2.104 26380 1f179ed754c2f7f30a36221bdcef0462d7347bc2
sentinel current-epoch 0
-
验证集群
哨兵实例状态:
[root@localhost redis-sentinel-cluster]# docker exec -it sentinel-1 redis-cli -h 192.168.2.104 -p 26379 192.168.2.104:26379> info # Server redis_version:3.2.12 redis_git_sha1:00000000 redis_git_dirty:0 redis_build_id:b0df607ad3315254 redis_mode:sentinel os:Linux 3.10.0-1062.el7.x86_64 x86_64 arch_bits:64 multiplexing_api:epoll gcc_version:6.3.0 process_id:1 run_id:ef2aaab897c0ffd0e37cabbdd6c3a17d841a8195 tcp_port:26379 uptime_in_seconds:1195 uptime_in_days:0 hz:10 lru_clock:13176031 executable:/data/redis-server config_file:/etc/redis/sentinel.conf # Clients connected_clients:2 client_longest_output_list:0 client_biggest_input_buf:0 blocked_clients:0 # CPU used_cpu_sys:2.85 used_cpu_user:1.02 used_cpu_sys_children:0.00 used_cpu_user_children:0.00 # Stats total_connections_received:7804 total_commands_processed:9530 instantaneous_ops_per_sec:2 total_net_input_bytes:631707 total_net_output_bytes:283491 instantaneous_input_kbps:0.17 instantaneous_output_kbps:0.01 rejected_connections:0 sync_full:0 sync_partial_ok:0 sync_partial_err:0 expired_keys:0 evicted_keys:0 keyspace_hits:0 keyspace_misses:0 pubsub_channels:0 pubsub_patterns:0 latest_fork_usec:0 migrate_cached_sockets:0 # Sentinel sentinel_masters:1 sentinel_tilt:0 sentinel_running_scripts:0 sentinel_scripts_queue_length:0 sentinel_simulate_failure_flags:0 master0:name=myredismaster,status=ok,address=192.168.2.104:16379,slaves=2,sentinels=2
master状态
192.168.2.104:26379> sentinel masters
1) 1) "name"
2) "myredismaster"
3) "ip"
4) "192.168.2.104"
5) "port"
6) "16379"
7) "runid"
8) "43addeccdf587cc939c0277f4455f84f09ac9e88"
9) "flags"
10) "master"
11) "link-pending-commands"
12) "0"
13) "link-refcount"
14) "1"
15) "last-ping-sent"
16) "0"
17) "last-ok-ping-reply"
18) "791"
19) "last-ping-reply"
20) "791"
21) "down-after-milliseconds"
22) "5000"
23) "info-refresh"
24) "9026"
25) "role-reported"
26) "master"
27) "role-reported-time"
28) "1203568"
29) "config-epoch"
30) "0"
31) "num-slaves"
32) "2"
33) "num-other-sentinels"
34) "1"
35) "quorum"
36) "2"
37) "failover-timeout"
38) "5000"
39) "parallel-syncs"
40) "1"
slave状态
192.168.2.104:26379> sentinel slaves myredismaster
1) 1) "name"
2) "192.168.2.104:16381"
3) "ip"
4) "192.168.2.104"
5) "port"
6) "16381"
7) "runid"
8) "be510b55c5589c0a75aba298d3a00a246ee463c5"
9) "flags"
10) "slave"
11) "link-pending-commands"
12) "0"
13) "link-refcount"
14) "1"
15) "last-ping-sent"
16) "0"
17) "last-ok-ping-reply"
18) "131"
19) "last-ping-reply"
20) "131"
21) "down-after-milliseconds"
22) "5000"
23) "info-refresh"
24) "8730"
25) "role-reported"
26) "slave"
27) "role-reported-time"
28) "1203243"
29) "master-link-down-time"
30) "0"
31) "master-link-status"
32) "ok"
33) "master-host"
34) "192.168.2.104"
35) "master-port"
36) "16379"
37) "slave-priority"
38) "100"
39) "slave-repl-offset"
40) "190133"
2) 1) "name"
2) "192.168.2.104:16380"
3) "ip"
4) "192.168.2.104"
5) "port"
6) "16380"
7) "runid"
8) "16fadcd2386524c9ee8047f52855c2bf6230d3cd"
9) "flags"
10) "slave"
11) "link-pending-commands"
12) "0"
13) "link-refcount"
14) "1"
15) "last-ping-sent"
16) "0"
17) "last-ok-ping-reply"
18) "130"
19) "last-ping-reply"
20) "130"
21) "down-after-milliseconds"
22) "5000"
23) "info-refresh"
24) "8730"
25) "role-reported"
26) "slave"
27) "role-reported-time"
28) "1203242"
29) "master-link-down-time"
30) "0"
31) "master-link-status"
32) "ok"
33) "master-host"
34) "192.168.2.104"
35) "master-port"
36) "16379"
37) "slave-priority"
38) "100"
39) "slave-repl-offset"
40) "190133"
至此,基于docker的Redis哨兵集群部署完成
