Docker builds a redis cluster (3 hosts and 3 slaves)

1. Create a network card

docker network create redis --subnet 172.38.0.0/16

by

docker network ls

Can be seen

View details

docker network inspect redis

Create a cluster

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

You can see that a node has appeared.

Check the configuration file and find that it has been written.

Start 6 services

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

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

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

docker run -p 6374:6379 -p 16374:16379 --name redis-4 \
>     -v /mydata/redis/node-4/data:/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

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

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

Enter a cluster

docker exec -it redis-1 /bin/sh

Create a cluster

--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

选择的时候输入yes

Connect to the cluster

redis-cli -c

The test

is 13 this host comes to save

We stop the host of 13 and

go to get a, and the slave will get to this value at 14.

View the details.

Here, 13 is written and the host is down 14 instead