Redis Cluster采用无中心结构，每个节点保存数据和整个集群状态,每个节点都和其他所有节点连接。
Redis Cluster提供了一种运行Redis安装的方法，在该安装中，数据会 在多个Redis节点之间自动分片。Redis Cluster 在分区期间还提供了一定程度的可用性，这实际上是在某些节点出现故障或无法通信时继续操作的能力。但是，如果发生较大故障（例如，大多数主服务器不可用时），集群将停止运行。Redis Cluster自动分割在多个节点之间的数据集，一部分节点出现故障或无法与集群的其余部分通信时，继续运行的能力。
创建网卡
docker network create redis --subnet 172.28.0.0/16
Redis配置
通过脚本创建6个 redis 配置
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
EOF
done
运行容器
# 容器1 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:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf # 容器2 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:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf # 容器3 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:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf # 容器4 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:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf # 容器5 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:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf # 容器6 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:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
创建集群
# 进入容器 > docker exec -it redis-1 /bin/sh # 进入容器后，在容器中创建集群 > 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 >>> Performing hash slots allocation on 6 nodes... Master[0] -> Slots 0 - 5460 Master[1] -> Slots 5461 - 10922 Master[2] -> Slots 10923 - 16383 Adding replica 172.28.0.15:6379 to 172.28.0.11:6379 Adding replica 172.28.0.16:6379 to 172.28.0.12:6379 Adding replica 172.28.0.14:6379 to 172.28.0.13:6379 M: cfb09d104f563d5dea870437cf73fac266b69a30 172.28.0.11:6379 slots:[0-5460] (5461 slots) master M: 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 172.28.0.12:6379 slots:[5461-10922] (5462 slots) master M: be4034133574260765165beac5fd1edacb63a2bd 172.28.0.13:6379 slots:[10923-16383] (5461 slots) master S: 74685c90c5aebdc8a035d288c962e22f98e994e8 172.28.0.14:6379 replicates be4034133574260765165beac5fd1edacb63a2bd S: 96b4185cc40b532b144b2ac3e2fe7213e7c13a50 172.28.0.15:6379 replicates cfb09d104f563d5dea870437cf73fac266b69a30 S: edd2e12510d921be2193df5b461033fc0f465144 172.28.0.16:6379 replicates 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 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 172.28.0.11:6379) M: cfb09d104f563d5dea870437cf73fac266b69a30 172.28.0.11:6379 slots:[0-5460] (5461 slots) master 1 additional replica(s) S: 96b4185cc40b532b144b2ac3e2fe7213e7c13a50 172.28.0.15:6379 slots: (0 slots) slave replicates cfb09d104f563d5dea870437cf73fac266b69a30 S: edd2e12510d921be2193df5b461033fc0f465144 172.28.0.16:6379 slots: (0 slots) slave replicates 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c M: be4034133574260765165beac5fd1edacb63a2bd 172.28.0.13:6379 slots:[10923-16383] (5461 slots) master 1 additional replica(s) M: 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 172.28.0.12:6379 slots:[5461-10922] (5462 slots) master 1 additional replica(s) S: 74685c90c5aebdc8a035d288c962e22f98e994e8 172.28.0.14:6379 slots: (0 slots) slave replicates be4034133574260765165beac5fd1edacb63a2bd [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered. # 启动redis集群客户端（-c表示集群） > redis-cli -c # 查看集群信息 > cluster info 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:235 cluster_stats_messages_pong_sent:225 cluster_stats_messages_sent:460 cluster_stats_messages_ping_received:220 cluster_stats_messages_pong_received:235 cluster_stats_messages_meet_received:5 cluster_stats_messages_received:460 # 集群创建好之后，11，12，13为主节点，其余为从节点 > cluster nodes 96b4185cc40b532b144b2ac3e2fe7213e7c13a50 172.28.0.15:6379@16379 slave cfb09d104f563d5dea870437cf73fac266b69a30 0 1596856234249 5 connected edd2e12510d921be2193df5b461033fc0f465144 172.28.0.16:6379@16379 slave 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 0 1596856234146 6 connected cfb09d104f563d5dea870437cf73fac266b69a30 172.28.0.11:6379@16379 myself,master - 0 1596856232000 1 connected 0-5460 be4034133574260765165beac5fd1edacb63a2bd 172.28.0.13:6379@16379 master - 0 1596856233000 3 connected 10923-16383 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 172.28.0.12:6379@16379 master - 0 1596856233000 2 connected 5461-10922 74685c90c5aebdc8a035d288c962e22f98e994e8 172.28.0.14:6379@16379 slave be4034133574260765165beac5fd1edacb63a2bd 0 1596856233230 4 connected
运行测试
添加Redis缓存
会返回所添加的对应的节点，如这里返回的是12的节点
set name weijishu -> Redirected to slot [5798] located at 172.28.0.12:6379 OK
停止容器
停止刚添加缓存的对应的redis节点
docker stop redis-2
当主节点断开之后，会自动将从节点切换为主节点，比如这里将16切换为了主节点
cluster nodes 96b4185cc40b532b144b2ac3e2fe7213e7c13a50 172.28.0.15:6379@16379 slave cfb09d104f563d5dea870437cf73fac266b69a30 0 1596856365279 5 connected edd2e12510d921be2193df5b461033fc0f465144 172.28.0.16:6379@16379 master - 0 1596856367324 7 connected 5461-10922 cfb09d104f563d5dea870437cf73fac266b69a30 172.28.0.11:6379@16379 myself,master - 0 1596856365000 1 connected 0-5460 be4034133574260765165beac5fd1edacb63a2bd 172.28.0.13:6379@16379 master - 0 1596856366814 3 connected 10923-16383 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 172.28.0.12:6379@16379 master,fail - 1596856348392 1596856346000 2 connected 74685c90c5aebdc8a035d288c962e22f98e994e8 172.28.0.14:6379@16379 slave be4034133574260765165beac5fd1edacb63a2bd 0 1596856366301 4 connected
获取缓存
如果能取到值，表示集群搭建成功，如下，从16这个节点中取到了值
get name -> Redirected to slot [5798] located at 172.28.0.16:6379 "weijishu"
原文地址：https://mp.weixin.qq.com/s?__biz=MzkzNjQzOTE3Nw==&mid=2247490241&idx=2&sn=64fd825c087fe279a1cf3d619f892e3d
声明： 猿站网有关资源均来自网络搜集与网友提供，任何涉及商业盈利目的的均不得使用，否则产生的一切后果将由您自己承担！ 本平台资源仅供个人学习交流、测试使用 所有内容请在下载后24小时内删除，制止非法恶意传播，不对任何下载或转载者造成的危害负任何法律责任！也请大家支持、购置正版！ 。本站一律禁止以任何方式发布或转载任何违法的相关信息访客发现请向站长举报，会员发帖仅代表会员个人观点，并不代表本站赞同其观点和对其真实性负责。本网站的资源部分来源于网络，如有侵权烦请发送邮件至：2697268773@qq.com进行处理。