RabbitMQ : Configure Cluster2016/09/03

	Configure RabbitMQ Cluster. This example uses 2 RabbitMQ servers.
[1]	Install and start RabbitMQ Server on all Nodes, refer to here. (If Firewalld is running, allow port, too)
[2]	If Firewalld is running, allow ports for clustering.

[root@dlp ~]#

firewall-cmd --add-port={4369/tcp,25672/tcp} --permanent

success
[root@dlp ~]#

firewall-cmd --reload

success

[3]	Configure clustering on a Node.

# put the same cookie on all nodes.

[root@node01 ~]#

ssh dlp.srv.world 'cat /var/lib/rabbitmq/.erlang.cookie' > /var/lib/rabbitmq/.erlang.cookie

[root@node01 ~]#

systemctl restart rabbitmq-server

# stop application and reset

[root@node01 ~]#

rabbitmqctl stop_app

Stopping node rabbit@node01 ...
...done.
[root@node01 ~]#

rabbitmqctl reset

Resetting node rabbit@node01 ...
...done.

# join in cluster (specify only hostname, not with FQDN)

[root@node01 ~]#

rabbitmqctl join_cluster rabbit@dlp

Clustering node rabbit@node01 with rabbit@dlp ...
...done.

# start application

[root@node01 ~]#

rabbitmqctl start_app

Starting node rabbit@node01 ...
...done.

# show status

[root@node01 ~]#

rabbitmqctl cluster_status

Cluster status of node rabbit@node01 ...
[{nodes,[{disc,[rabbit@dlp,rabbit@node01]}]},
 {running_nodes,[rabbit@dlp,rabbit@node01]},
 {cluster_name,<<"rabbit@dlp.srv.world">>},
 {partitions,[]}]
...done.

[4]	Configure Queue sync setting. This example shows to configure that Queue is synced on all Nodes. There are some modes to sync among Nodes, refer details to official site below. ⇒ http://www.rabbitmq.com/ha.html

# add Queue for sync

[root@dlp ~]#

rabbitmqadmin declare queue name=shared_queue

queue declared

# set sync policy

# rabbitmqctl set_policy [policy name(any name you like)] [Queue] [Mode]

[root@dlp ~]#

rabbitmqctl set_policy ha-policy "shared_queue" '{"ha-mode":"all"}'

Setting policy "ha-policy" for pattern "shared_queue" to "{\"ha-mode\":\"all\"}" with priority "0" ...
...done.

# show status

[root@dlp ~]#

rabbitmqadmin list queues name node policy slave_nodes state synchronised_slave_nodes

+--------------+------------+-----------+---------------+---------+--------------------------+
|     name     |    node    |  policy   |  slave_nodes  |  state  | synchronised_slave_nodes |
+--------------+------------+-----------+---------------+---------+--------------------------+
| shared_queue | rabbit@dlp | ha-policy | rabbit@node01 | running | rabbit@node01            |
+--------------+------------+-----------+---------------+---------+--------------------------+

[5]	Enabling management Plugin on all Nodes, it's possible to see each Node's status like follows.

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