Docker內Redis集羣環境配置

Redis集羣環境配置

首先要創建docker內的網絡環境

docker network create redis --subnet 172.28.0.0/16

配置文件的第一種聲明方式內網運行，這種方式在虛擬機外電腦上會出現Can't connect to master的錯誤
for port in $(seq 1 6); \
do \
mkdir -p ~/redis/node-${port}/conf
touch ~/redis/node-${port}/conf/redis.conf
cat << EOF > ~/redis/node-${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 172.28.0.1${port}
cluster-announce-port 6379
cluster-announce-bus-port 16379
appendonly yes
protected-mode no
EOF
done

第二種聲明方式，cluster-announce-ip cluster-announce-port,cluster-announce-bus-port均聲明爲後面所設置的宿主機的端口和IP,後續在redission連接集羣的時候就不會有問題
for port in $(seq 1 6); \
do \
mkdir -p ~/redis/node-${port}/conf
touch ~/redis/node-${port}/conf/redis.conf
cat << EOF > ~/redis/node-${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 192.168.200.129
cluster-announce-port 637${port}
cluster-announce-bus-port 1637${port}
appendonly yes
protected-mode no
EOF
done

依次在docker內啓動幾臺Redis

docker run -p 6371:6379 -p 16371:16379 --name redis-1 \
-v ~/redis/node-1/data:/data \
-v ~/redis/node-1/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.11 redis:6.0.5 redis-server /etc/redis/redis.conf


docker run -p 6372:6379 -p 16372:16379 --name redis-2 \
-v ~/redis/node-2/data:/data \
-v ~/redis/node-2/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.12 redis:6.0.5 redis-server /etc/redis/redis.conf

docker run -p 6373:6379 -p 16373:16379 --name redis-3 \
-v ~/redis/node-3/data:/data \
-v ~/redis/node-3/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.13 redis:6.0.5 redis-server /etc/redis/redis.conf

docker run -p 6374:6379 -p 16374:16379 --name redis-4 \
-v ~/redis/node-4/data:/data \
-v ~/redis/node-4/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.14 redis:6.0.5 redis-server /etc/redis/redis.conf

docker run -p 6375:6379 -p 16375:16379 --name redis-5 \
-v ~/redis/node-5/data:/data \
-v ~/redis/node-5/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.15 redis:6.0.5 redis-server /etc/redis/redis.conf

docker run -p 6376:6379 -p 16376:16379 --name redis-6 \
-v ~/redis/node-6/data:/data \
-v ~/redis/node-6/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.16 redis:6.0.5 redis-server /etc/redis/redis.conf

進入docker機並使用上述的兩種方式連接，推薦第二種，因爲後續使用redission連接不會出現錯誤

docker exec -it redis-1 /bin/sh

redis-cli --cluster create 172.28.0.11:6379 172.28.0.12:6379 172.28.0.13:6379 172.28.0.14:6379 172.28.0.15:6379 172.28.0.16:6379 --cluster-replicas 1

redis-cli --cluster create 192.168.200.129:6371 192.168.200.129:6372 192.168.200.129:6373 192.168.200.129:6374 192.168.200.129:6375 192.168.200.129:6376 --cluster-replicas 1

set name Stephen

// docker stop redis-2
cluster nodes
get name

增加配置文件

for port in $(seq 7 8); \
do \
mkdir -p ~/redis/node-${port}/conf
touch ~/redis/node-${port}/conf/redis.conf
cat << EOF > ~/redis/node-${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 172.28.0.${port}
cluster-announce-port 6379
cluster-announce-bus-port 16379
appendonly yes
protected-mode no
EOF
done

增加節點

docker run -p 6377:6379 -p 16377:16379 --name redis-7 \
-v ~/redis/node-7/data:/data \
-v ~/redis/node-7/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.7 redis:6.0.5 redis-server /etc/redis/redis.conf

擴容和遷移哈希槽

redis-cli --cluster add-node 192.168.200.129:6377 192.168.200.129:6371
redis-cli --cluster reshard 192.168.200.129:6371 --cluster-from
ace4dd7a1bb73e41b1f7a333a3985b97e7924674,a217ca96441fa2b1a7c6fe76488b747eba4fc96d,166f6ff5a32801d938408124edd86bb88206697b --cluster-to e2897d53e41c9d6f84bd2d405d36247aeefee148 --cluster-slots 100

參考https://stephen520.cn/blog/10271

歡迎搜索關注本人與朋友共同開發的微信面經小程序【大廠面試助手】和公衆號【微瞰技術】，以及總結的分類面試題https://github.com/zhendiao/JavaInterview