redis集群搭建脚本及linux命令

其他 2020-09-22 10:57:10 阅读次数: 0

介绍

依照以下顺序手把手教你用docker容器搭建一个简单的主从复制的redis集群，如果搭建成功，欢迎点赞。

设置redis集群网卡及查看

docker network create redis --subnet 172.38.0.0/16
docker network ls
docker network inspect redis

redis节点创建及设置

for port in $(seq 1 6);
do
mkdir -p /mydata/redis/node-${port}/conf
touch /mydata/redis/node-${port}/conf/redis.conf
cat << EOF >/mydata/redis/node-${port}/conf/redis.conf
port 6379
bind 0.0.0.0
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
cluster-announce-ip 172.38.0.1${port}
cluster-announce-port 6379
cluster-announce-bus-port 16379
appendonly yes
EOF
done

拉取redis镜像并启动redis节点

//节点1
docker run -p 6371:6379 -p 16371:16379 --name redis-1 \
 -v /mydata/redis/node-1/data:/data \
 -v /mydata/redis/node-1/conf/redis.conf:/etc/redis/redis.conf \
 -d --net redis --ip 172.38.0.11 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf

//节点2
docker run -p 6372:6379 -p 16372:16379 --name redis-2 \
 -v /mydata/redis/node-2/data:/data \
 -v /mydata/redis/node-2/conf/redis.conf:/etc/redis/redis.conf \
 -d --net redis --ip 172.38.0.12 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf

//节点3
docker run -p 6373:6379 -p 16373:16379 --name redis-3 \
 -v /mydata/redis/node-3/data:/data \
 -v /mydata/redis/node-3/conf/redis.conf:/etc/redis/redis.conf \
 -d --net redis --ip 172.38.0.13 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf

//节点4
docker run -p 6374:6379 -p 16374:16379 --name redis-4 \
 -v /mydata/redis/node-4data:/data \
 -v /mydata/redis/node-4/conf/redis.conf:/etc/redis/redis.conf \
 -d --net redis --ip 172.38.0.14 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf

//节点5
docker run -p 6375:6379 -p 16375:16379 --name redis-5 \
 -v /mydata/redis/node-5/data:/data \
 -v /mydata/redis/node-5/conf/redis.conf:/etc/redis/redis.conf \
 -d --net redis --ip 172.38.0.15 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf

//节点6
docker run -p 6376:6379 -p 16376:16379 --name redis-6 \
 -v /mydata/redis/node-6/data:/data \
 -v /mydata/redis/node-6/conf/redis.conf:/etc/redis/redis.conf \
 -d --net redis --ip 172.38.0.16 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf

以交互模式进入redis节点内

docker exec -it redis-1 /bin/sh

创建redis集群

redis-cli --cluster create 172.38.0.11:6379 172.38.0.12:6379 \
172.38.0.13:6379 172.38.0.14:6379 172.38.0.15:6379 \
172.38.0.16:6379 --cluster-replicas 1

运行成功界面如下，（主从复制）集群创建成功

/data # redis-cli --cluster create 172.38.0.11:6379 172.38.0.12:6379 \
> 172.38.0.13:6379 172.38.0.14:6379 172.38.0.15:6379 \
> 172.38.0.16:6379 --cluster-replicas 
Unrecognized option or bad number of args for: '--cluster-replicas'
/data # redis-cli --cluster create 172.38.0.11:6379 172.38.0.12:6379 \
> 172.38.0.13:6379 172.38.0.14:6379 172.38.0.15:6379 \
> 172.38.0.16:6379 --cluster-replicas 1
>>> Performing hash slots allocation on 6 nodes...

//这里显示了master和slave节点的分配
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 172.38.0.15:6379 to 172.38.0.11:6379
Adding replica 172.38.0.16:6379 to 172.38.0.12:6379
Adding replica 172.38.0.14:6379 to 172.38.0.13:6379
M: 887c5ded66d075b6d29602f89a6adc7d1471d22c 172.38.0.11:6379
   slots:[0-5460] (5461 slots) master
M: 7684dfd02929085817de59f334d241e6cbcd1e99 172.38.0.12:6379
   slots:[5461-10922] (5462 slots) master
M: db3caa7ba307a27a8ef30bf0b26ba91bfb89e932 172.38.0.13:6379
   slots:[10923-16383] (5461 slots) master
S: d75a9db032f13d9484909b2d0d4724f44e3f1c23 172.38.0.14:6379
   replicates db3caa7ba307a27a8ef30bf0b26ba91bfb89e932
S: e6b5521d86abc96fe2e51e40be8fbb1f23da9fe7 172.38.0.15:6379
   replicates 887c5ded66d075b6d29602f89a6adc7d1471d22c
S: b6add5e06fd958045f90f29bcbbf219753798ef6 172.38.0.16:6379
   replicates 7684dfd02929085817de59f334d241e6cbcd1e99
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
...
>>> Performing Cluster Check (using node 172.38.0.11:6379)
M: 887c5ded66d075b6d29602f89a6adc7d1471d22c 172.38.0.11:6379
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
S: e6b5521d86abc96fe2e51e40be8fbb1f23da9fe7 172.38.0.15:6379
   slots: (0 slots) slave
   replicates 887c5ded66d075b6d29602f89a6adc7d1471d22c
S: d75a9db032f13d9484909b2d0d4724f44e3f1c23 172.38.0.14:6379
   slots: (0 slots) slave
   replicates db3caa7ba307a27a8ef30bf0b26ba91bfb89e932
S: b6add5e06fd958045f90f29bcbbf219753798ef6 172.38.0.16:6379
   slots: (0 slots) slave
   replicates 7684dfd02929085817de59f334d241e6cbcd1e99
M: 7684dfd02929085817de59f334d241e6cbcd1e99 172.38.0.12:6379
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
M: db3caa7ba307a27a8ef30bf0b26ba91bfb89e932 172.38.0.13:6379
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

创建集群成功后，可以进一步查看集群配置，并进行测试

/data # redis-cli -c   //-c表示集群
127.0.0.1:6379> cluster info  //集群配置
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_ping_sent:613
cluster_stats_messages_pong_sent:614
cluster_stats_messages_sent:1227
cluster_stats_messages_ping_received:609
cluster_stats_messages_pong_received:613
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:1227
127.0.0.1:6379> cluster nodes //集群节点信息
887c5ded66d075b6d29602f89a6adc7d1471d22c 172.38.0.11:6379@16379 myself,master - 0 1598439359000 1 connected 0-5460
e6b5521d86abc96fe2e51e40be8fbb1f23da9fe7 172.38.0.15:6379@16379 slave 887c5ded66d075b6d29602f89a6adc7d1471d22c 0 1598439359580 5 connected
d75a9db032f13d9484909b2d0d4724f44e3f1c23 172.38.0.14:6379@16379 slave db3caa7ba307a27a8ef30bf0b26ba91bfb89e932 0 1598439358578 4 connected
b6add5e06fd958045f90f29bcbbf219753798ef6 172.38.0.16:6379@16379 slave 7684dfd02929085817de59f334d241e6cbcd1e99 0 1598439358578 6 connected
7684dfd02929085817de59f334d241e6cbcd1e99 172.38.0.12:6379@16379 master - 0 1598439360082 2 connected 5461-10922
db3caa7ba307a27a8ef30bf0b26ba91bfb89e932 172.38.0.13:6379@16379 master - 0 1598439359079 3 connected 10923-16383

关于redis集群高可用的简单测试

127.0.0.1:6379> set msg "hello,I like your blog!" 设置值
-> Redirected to slot [6257] located at 172.38.0.12:6379
OK
172.38.0.12:6379> get msg //取值
"hello,I like your blog!"

//用docker stop模拟存储msg值的redis主机宕机
[root@instance-001 panhom]# docker ps
CONTAINER ID        IMAGE                    COMMAND                  CREATED             STATUS              PORTS                                              NAMES
705e41851450        redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   20 minutes ago      Up 20 minutes       0.0.0.0:6376->6379/tcp, 0.0.0.0:16376->16379/tcp   redis-6
89844e29f714        redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   20 minutes ago      Up 20 minutes       0.0.0.0:6375->6379/tcp, 0.0.0.0:16375->16379/tcp   redis-5
8f1ead5ca10a        redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   20 minutes ago      Up 20 minutes       0.0.0.0:6374->6379/tcp, 0.0.0.0:16374->16379/tcp   redis-4
f77c5d93a97a        redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   21 minutes ago      Up 21 minutes       0.0.0.0:6373->6379/tcp, 0.0.0.0:16373->16379/tcp   redis-3
cc2a93a6b4dd        redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   21 minutes ago      Up 21 minutes       0.0.0.0:6372->6379/tcp, 0.0.0.0:16372->16379/tcp   redis-2
6c9c3b813129        redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   26 minutes ago      Up 26 minutes       0.0.0.0:6371->6379/tcp, 0.0.0.0:16371->16379/tcp   redis-1
[root@instance-001 panhom]# docker stop redis-2
redis-2

//重新进入集群交互界面，并尝试获取msg消息
/data # exit
[root@instance-001 panhom]# docker exec -it redis-1 /bin/sh
/data # redis-cli -c
127.0.0.1:6379> get ms
-> Redirected to slot [13186] located at 172.38.0.13:6379
(nil)
172.38.0.13:6379> get msg
-> Redirected to slot [6257] located at 172.38.0.16:6379 //此时由备用机返回msg
"hello,I like your blog!"

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转载自blog.csdn.net/weixin_41896265/article/details/108245264
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