Rabbitmq Server Cluster Installation in Amazon EC2(Amazon Linux AMI)

Install Erlang environment

Before install Erlang, please make sure your system has the latest the update, we need to try to get the latest Erlang verson:

sudo yum clean all
sudo yum -y update

then use linux yum tool to install Erlang:

sudo yum clean all

You can use erl -v to check the installation and the Erlang version you installed.

Install Rabbitmq environment

Download latest Rabbitmq installation file from its official website http://www.rabbitmq.com/install-rpm.html. For now, the latest Rabbitmq version is 3.3.5-1:

wget http://www.rabbitmq.com/releases/rabbitmq-server/v3.3.5/rabbitmq-server-3.3.5-1.noarch.rpm

Use rpm tool to install Rabbitmq

sudo rpm -ivh rabbitmq-server-3.3.5-1.noarch.rpm

You can use start & stop command to verify your installation

sudo /etc/init.d/rabbitmq-server start
sudo /etc/init.d/rabbitmq-server stop

If you want to totally stop rabbitmq service, you need to kill the process:

ps aux | grep rabbitmq

then find the pid of rabbitmq, kill it sudo kill -9 rabbitmq-pid

Configure server host mapping

You need to configure the host name and its ip address mapping, you can use hostname command to check current server host name.

We have created three servers, so we should add the following information to /etc/hosts file:

172.31.1.166 ip-172-31-1-166
172.31.1.167 ip-172-31-1-167
172.31.1.168 ip-172-31-1-168

Notice: The IP address is the EC2 instance private IP.

Initialize Rabbitmq configuration file "rabbitmq.config"

For the default, after you install Rabbitmq server, you will not find the rabbitmq.config file in /etc/rabbitmq/, you need to create it by yourself.

sudo cp /usr/share/doc/rabbitmq-server-3.3.5/rabbitmq.config.example /etc/rabbitmq/rabbitmq.confi

Configure Rabbitmq server cluster information in its configuration file

Configure the private IP in this configuration file

{cluster_nodes, {['rabbit@ip-172-31-5-198', 'rabbit@ip-172-31-5-195', 'rabbit@ip-172-31-5-193'], ram}}

if you change the configuration file, you need stop_app and reset it.

Synchronize Erlang cookie to all the servers in this cluster

We need to make all the servers have the same cookie information, then the Rabbitmq server can communicate each other.

You can use two way to synchronize the cookie information, the cookie information in /var/lib/rabbitmq/.erlang.cookie. The cookie value is like ODZLSBTZPNQIQFEAGYFV.

• Use scp command to copy the .erlang.cookie file to another servers.
• Use vim to edit other servers .erlang.cookie file, make them have the same value.

Before you use vim to edit the value, you need to set the write permission to the .erlang.cookie file:

sudo chmod 600 /var/lib/rabbitmq/.erlang.cookie

If you cannot find the .erlang.cookie, it means you have never started Rabbitmq server, please start it and then you will found this file.

Active Rabbitmq server cluster

You need to use the following command to active Rabbitmq server cluster:

sudo /etc/init.d/rabbitmq-server start
sudo rabbitmqctl stop_app
sudo rabbitmqctl reset
sudo /etc/init.d/rabbitmq-server restart

You can use the following command to check the cluster status:

sudo rabbitmqctl cluster_status

Enable Rabbitmq management plugin

Use the following command to enable rabbitmq management page:

sudo rabbitmq-plugins enable rabbitmq_management

After this, please remember to restart Rabbitmq server:

sudo /etc/init.d/rabbitmq-server restart

Then you can use your server public IP or public DNS to visit this management page: http://your-public-ip:15672

Create user to manage Rabbitmq server cluster

For now, we will create a test account, username is gabriel and password is tkz123.

sudo rabbitmqctl add_user gabriel tkz123

Make this account as administrator:

sudo rabbitmqctl set_user_tags gabriel administrator

Set permission for the specified vhost, this is set for the default vhost /:

sudo rabbitmqctl set_permissions -p / gabriel "." "." ".*"

Notice: For this command, you just need to run once in any one of the clusters, another server will synchronize this information.

Configure HA policy for mirror exchange and mirror queues

Visit Admin-->Policies-->Add Policy, and add the following configuration:

VHost: mail
Name: webmail.ha.policy
Pattern: ^webmail.
Apply to: Exchanges and Queues
Definition: ha-mode=all