部署Redis叢集
阿新 • • 發佈：2020-11-27
分片+高可用+負載均衡
其中一個掛了，備用的頂上
redis叢集
啟動6個容器
建立redis叢集網絡卡
docker network create redis --subnet 172.38.0.0/16
檢視redis網絡卡的詳細資訊
docker network inspect redis
配置redis叢集
通過指令碼建立6個redis配置
for port in $(seq 1 6); \ do \ mkdir -p /data/redis/node-${port}/conf touch /data/redis/node-${port}/conf/redis.conf cat << EOF >/data/redis/node-${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${port} cluster-announce-port 6379 cluster-announce-bus-port 16379 appendonly yes EOF done
檢視建立的檔案
啟動容器
#指令碼 docker run -p 637${port}:6379 -p 1637${port}:16379 --name redis-${port} \ -v /data/redis/node-${port}/data:/data \ -v /data/redis/node-${port}/conf/redis.conf:/etc/redis/redis.conf \ -d --net redis --ip 172.38.0.1${port} redis:5.0.10-alpine3.12 redis-server /etc/redis/redis.conf; \ #手動 docker run -p 6371:6379 -p 16371:16379 --name redis-1 -v /data/redis/node-1/data:/data -v /data/redis/node-1/conf/redis.conf:/etc/redis/redis.conf -d --net redis --ip 172.38.0.11 redis:5.0.10-alpine3.12 redis-server /etc/redis/redis.conf
檢視啟動容器
docker ps
進入redis容器
redis中沒有bash命令，redis進入使用/bin/sh
docker exec -it IDNAME /bin/sh
進入後預設的目錄為/data
建立叢集
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
叢集建立完畢
#過程 >>> Performing hash slots allocation on 6 nodes... 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: 290353fdbf5a7345e66fee97be33fa4e352eadfb 172.38.0.11:6379 slots:[0-5460] (5461 slots) master M: 2d341c0a2aac0cd99a4cec112292bc7c48e608e2 172.38.0.12:6379 slots:[5461-10922] (5462 slots) master M: 4d1882d9fa8f86d794bfad393ae982be4350338c 172.38.0.13:6379 slots:[10923-16383] (5461 slots) master S: 8319c1e759a38114d5208ab329dc241b35289d28 172.38.0.14:6379 replicates 4d1882d9fa8f86d794bfad393ae982be4350338c S: 8b81002b5dcef5041c5ca70605c8cc30a53d05e0 172.38.0.15:6379 replicates 290353fdbf5a7345e66fee97be33fa4e352eadfb S: 530887eef54e59efe34b2a98f131fdc5cc6e1937 172.38.0.16:6379 replicates 2d341c0a2aac0cd99a4cec112292bc7c48e608e2 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: 290353fdbf5a7345e66fee97be33fa4e352eadfb 172.38.0.11:6379 slots:[0-5460] (5461 slots) master 1 additional replica(s) M: 2d341c0a2aac0cd99a4cec112292bc7c48e608e2 172.38.0.12:6379 slots:[5461-10922] (5462 slots) master 1 additional replica(s) M: 4d1882d9fa8f86d794bfad393ae982be4350338c 172.38.0.13:6379 slots:[10923-16383] (5461 slots) master 1 additional replica(s) S: 8319c1e759a38114d5208ab329dc241b35289d28 172.38.0.14:6379 slots: (0 slots) slave replicates 4d1882d9fa8f86d794bfad393ae982be4350338c S: 8b81002b5dcef5041c5ca70605c8cc30a53d05e0 172.38.0.15:6379 slots: (0 slots) slave replicates 290353fdbf5a7345e66fee97be33fa4e352eadfb S: 530887eef54e59efe34b2a98f131fdc5cc6e1937 172.38.0.16:6379 slots: (0 slots) slave replicates 2d341c0a2aac0cd99a4cec112292bc7c48e608e2 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
連線叢集
redis-cli -c
檢視叢集資訊
6379>cluster info
檢視節點資訊
127.0.0.1:6379>cluster nodes
注：3主3從
set a b
主節點在處理
從機應該也有一個這樣的值，主節點掛了，從節點應該替代上來。（高可用）
檢視執行的容器
docker ps
停掉主節點
docker stop ID
再次get值，連線超時
再次連線，get a
master失敗，從172.38.0.14從節點自動升為主節點
Docker搭建redis叢集完成！
使用docker之後，所有的技術慢慢變的簡單起來！