kubernetes上部署Rabbitmq高可用记录
部署RabbitMq
RabbitMQ集群的两种模式
1)普通模式:默认的集群模式,队列消息只存在单个节点上
2)镜像模式:队列为镜像队列,队列消息存在每个节点上
镜像模式结构
官方解释:镜像模式是通过policy策略方式实现的
配置同步: 1.Ha mode 同步模式,以下可选: 1)all 所有的节点都将被同步 2)exactly 指定个数的节点被同步 3)nodes 指定的名称的节点被同步 2.Ha params 上一项中的参数 3.Ha async mode 同步方式,自动或手动
主要部署步骤
使用statefulset启动N个rabbitmq节点
mq-5c0f5af17b04e-0 1/1 Running 0 6m mq-5c0f5af17b04e-1 1/1 Running 0 5m mq-5c0f5af17b04e-2 1/1 Running 0 3m
每个节点执行以下初始化脚本
if [ -z "$(grep rabbitmq /etc/resolv.conf)" ]; then sed "s/^search \([^ ]\+\)/search ${MY_POD_NAME%-*}.\1 \1/" /etc/resolv.conf > /etc/resolv.conf.new; cat /etc/resolv.conf.new > /etc/resolv.conf; rm /etc/resolv.conf.new; fi; #检查集群状态 until rabbitmqctl node_health_check; do sleep 1; done; # 加入集群,设置同步策略(镜像模式) if [ -z "$(rabbitmqctl cluster_status | grep ${MY_POD_NAME%-*}-0)" ]; then rabbitmqctl stop_app; rabbitmqctl reset; rabbitmqctl join_cluster rabbit@${MY_POD_NAME%-*}-0; rabbitmqctl start_app; rabbitmqctl set_policy mirror-queues "^" '{"ha-mode":"all","ha-sync-mode":"automatic"}' fi;
进入容器,查看集群状态
root@mq-5c0f5af17b04e-0:/# rabbitmqctl cluster_status Cluster status of node rabbit@mq-5c0f5af17b04e-0 ... [{nodes,[{disc,['rabbit@mq-5c0f5af17b04e-0','rabbit@mq-5c0f5af17b04e-1', 'rabbit@mq-5c0f5af17b04e-2']}]}, {running_nodes,['rabbit@mq-5c0f5af17b04e-2','rabbit@mq-5c0f5af17b04e-1', 'rabbit@mq-5c0f5af17b04e-0']}, {cluster_name,<<"rabbit@mq-5c0f5af17b04e-0.mq-5c0f5af17b04e.itfarm3.svc.cluster.local">>}, {partitions,[]}, {alarms,[{'rabbit@mq-5c0f5af17b04e-2',[]}, {'rabbit@mq-5c0f5af17b04e-1',[]}, {'rabbit@mq-5c0f5af17b04e-0',[]}]}]
在web页面中查看集群状态
查看队列
测试高可用
镜像同步
生产一条消息,查看状态
//所有节点都存在消息 root@mq-5c0f5af17b04e-0:/# rabbitmqctl list_queues Timeout: 60.0 seconds ... Listing queues for vhost / ... mirror-admin 1 root@mq-5c0f5af17b04e-1:/# rabbitmqctl list_queues Timeout: 60.0 seconds ... Listing queues for vhost / ... mirror-admin 1 root@mq-5c0f5af17b04e-2:/# rabbitmqctl list_queues Timeout: 60.0 seconds ... Listing queues for vhost / ... mirror-admin 1
故障模拟
//删除多个节点,查看状态 $ kubectl.exe delete po mq-5c0f5af17b04e-0 mq-5c0f5af17b04e-1 pod "mq-5c0f5af17b04e-0" deleted pod "mq-5c0f5af17b04e-1" deleted
//重启后,故障节点恢复队列消息 root@mq-5c0f5af17b04e-0:/# rabbitmqctl list_queues Timeout: 60.0 seconds ... Listing queues for vhost / ... mirror-admin 1 root@mq-5c0f5af17b04e-1:/# rabbitmqctl list_queues Timeout: 60.0 seconds ... Listing queues for vhost / ... mirror-admin 1
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