RabbitMQ 集群安装
# rabbitmq cluster
192.168.0.62 rabbitmq1
192.168.0.63 rabbitmq2
192.168.0.64 rabbitmq3- 由于笔者的rabbitmq节点是虚拟机，rabbitmq2，rabbitmq3由rabbitmq1克隆而来，因此笔者三台的erlang.cookie都一样，如果rabbitmq节点单独安装的需要同步erlang.cookie值到每个节点
#以rabbitmq1为例：
scp /var/lib/rabbitmq/.erlang.cookie rabbitmq2:/var/lib/rabbitmq/.erlang.cookie
scp /var/lib/rabbitmq/.erlang.cookie rabbitmq3:/var/lib/rabbitmq/.erlang.cookie- 配置集群，以rabbitmq1节点为例：
systemctl restart rabbitmq-server- 创建集群
#把rabbitmq2加到rabbitmq1集群当中，再把rabbitm3加到rabbitmq1集群中
# rabbitmq2上执行：
[root@rabbitmq2 ~]# rabbitmqctl stop_app
Stopping rabbit application on node rabbit@rabbitmq2 ...
[root@rabbitmq2 ~]# rabbitmqctl join_cluster rabbitmqctl join_cluster^C
[root@rabbitmq2 ~]# rabbitmqctl join_cluster rabbit@rabbitmq1
Clustering node rabbit@rabbitmq2 with rabbit@rabbitmq1
[root@rabbitmq2 ~]# rabbitmqctl start_app
Starting node rabbit@rabbitmq2 ...
completed with 6 plugins.
# rabbitmq3上执行：
[root@rabbitmq3 ~]# rabbitmqctl stop_app
Stopping rabbit application on node rabbit@rabbitmq3 ...
[root@rabbitmq3 ~]# rabbitmqctl join_cluster rabbitmqctl join_cluster^C
[root@rabbitmq3 ~]# rabbitmqctl join_cluster rabbit@rabbitmq1
Clustering node rabbit@rabbitmq3 with rabbit@rabbitmq1
[root@rabbitmq3 ~]# rabbitmqctl start_app
Starting node rabbit@rabbitmq3 ...
completed with 6 plugins.
#rabbitmq1上查看：
[root@rabbitmq1 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq1 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2]}]},
{running_nodes,[rabbit@rabbitmq2,rabbit@rabbitmq1]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq2,[]},{rabbit@rabbitmq1,[]}]}] # rabbitmq2先加到集群中来
[root@rabbitmq1 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq1 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]}]},
{running_nodes,[rabbit@rabbitmq3,rabbit@rabbitmq2,rabbit@rabbitmq1]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq3,[]},{rabbit@rabbitmq2,[]},{rabbit@rabbitmq1,[]}]}] # rabbitmq3也加到集群中来
[root@rabbitmq1 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq1 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]}]},
{running_nodes,[rabbit@rabbitmq3,rabbit@rabbitmq2,rabbit@rabbitmq1]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq3,[]},{rabbit@rabbitmq2,[]},{rabbit@rabbitmq1,[]}]}]
[root@rabbitmq1 ~]#
[root@rabbitmq2 ~]# rabbitmqctl start_app
Starting node rabbit@rabbitmq2 ...
completed with 6 plugins.
[root@rabbitmq2 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq2 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]}]},
{running_nodes,[rabbit@rabbitmq3,rabbit@rabbitmq1,rabbit@rabbitmq2]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq3,[]},{rabbit@rabbitmq1,[]},{rabbit@rabbitmq2,[]}]}]
[root@rabbitmq3 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq3 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]}]},
{running_nodes,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq1,[]},{rabbit@rabbitmq2,[]},{rabbit@rabbitmq3,[]}]}]- 可以通过在任何节点上运行cluster_status命令来看到这三个节点已加入到群集中：
rabbitmqctl cluster_status
重启集群节点
模拟故障：停掉rabbit@rabbitmq1、rabbit@rabbitmq3，检查集群状态
[root@rabbitmq1 ~]# rabbitmqctl stop
Stopping and halting node rabbit@rabbitmq1 ...
# rabbitmq2： 查看
[root@rabbitmq2 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq2 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]}]},
{running_nodes,[rabbit@rabbitmq3,rabbit@rabbitmq2]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq3,[]},{rabbit@rabbitmq2,[]}]}]
# rabbitmq3上查看：
[root@rabbitmq3 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq3 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]}]},
{running_nodes,[rabbit@rabbitmq2,rabbit@rabbitmq3]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq2,[]},{rabbit@rabbitmq3,[]}]}] - 停掉rabbitmq3，rabbitm2上查看集群状态：
[root@rabbitmq2 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq2 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]}]},
{running_nodes,[rabbit@rabbitmq2]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq2,[]}]}]- 重新启动rabbitmq1，rabbitmq3，查看集群状态
[root@rabbitmq1 ~]# rabbitmq-server -detached
Warning: PID file not written; -detached was passed. # 忽略
[root@rabbitmq1 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq1 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]}]},
{running_nodes,[rabbit@rabbitmq2,rabbit@rabbitmq1]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq2,[]},{rabbit@rabbitmq1,[]}]}]
[root@rabbitmq3 ~]# rabbitmq-server -detached
[root@rabbitmq3 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq3 ...
[{nodes,[{disc,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]}]},
{running_nodes,[rabbit@rabbitmq1,rabbit@rabbitmq2,rabbit@rabbitmq3]},
{cluster_name,<<"rabbit@rabbitmq1">>},
{partitions,[]},
{alarms,[{rabbit@rabbitmq1,[]},{rabbit@rabbitmq2,[]},{rabbit@rabbitmq3,[]}]}]破坏集群
- 从集群中移除rabbitmq3
rabbitmqctl stop_app
rabbitmqctl reset
rabbitmqctl start_app
即可- 远程删除节点，在rabbitmq2上，删除rabbitmq1
rabbitmqctl stop_app # rabbitmq1上操作
rabbitmqctl forget_cluster_node rabbit@rabbitmq1 # rabbitmq2上操作
rabbitmqctl forget_cluster_node # 自动清理未知节点- 创建ram节点
rabbitmqctl stop_app
rabbitmqctl join_cluster --ram rabbit@rabbitmq1
rabbitmqctl start_app- 改变节点类型
rabbitmqctl stop_app
rabbitmqctl change_cluster_node_type disc
rabbitmqctl start_app报错
# 重启rabbitmq-server服务器，再次登录之前创建的rabbitmq用户报错：
[warning] <0.694.0> HTTP access denied: user 'rabbitmq' - invalid credentials
## 解决：
vim /usr/lib/rabbitmq/lib/rabbitmq_server-3.7.4/ebin/rabbit.app # 使用find / -name rabbit.app搜索
找到：loopback_users里的<<”guest”>>删除
如下：{loopback_users, []}
重启：systemctl restart rabbitmq-server.service # 生产环境不建议这么做
## 创建一个管理员用户登录管理界面
rabbitmqctl add_user rabbitmq rabbitmqpassword && rabbitmqctl set_user_tags rabbitmq administrator # 集群情况下，创建用户时，每个节点会自动同步