Install RabbitMQ on CentOS 7

install-rabbitmq-centos-7.md

Install RabbitMQ on CentOS 7

sudo yum -y install epel-release
sudo yum -y update

Install Erlang

Download repository

wget http://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpm

Add repository

sudo rpm -Uvh erlang-solutions-1.0-1.noarch.rpm

Install erlang and dependencies

sudo yum -y install erlang socat logrotate

Install RabbitMQ

Download RabbitMQ package

wget https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.8.8/rabbitmq-server-3.8.8-1.el6.noarch.rpm

Add signing key

sudo rpm --import https://www.rabbitmq.com/rabbitmq-signing-key-public.asc

Install rabbitmq-server

sudo rpm -Uvh rabbitmq-server-3.8.8-1.el6.noarch.rpm

Start RabbitMQ

sudo systemctl start rabbitmq-server

Automatically start RabbitMQ at boot time

sudo systemctl enable rabbitmq-server

RabbitMQ Config (Optional)

Create rabbitmq conf file at /etc/rabbitmq/rabbitmq.conf

listeners.ssl.default = 5671

ssl_options.cacertfile = /path/to/cacertfile.pem
ssl_options.certfile   = /path/to/certfile.pem
ssl_options.keyfile    = /path/to/keyfile.pem
ssl_options.verify     = verify_peer
ssl_options.versions.1 = tlsv1.2
ssl_options.versions.2 = tlsv1.1
ssl_options.fail_if_no_peer_cert = false

tcp_listen_options.backlog       = 128
tcp_listen_options.nodelay       = true
tcp_listen_options.exit_on_close = false
tcp_listen_options.keepalive     = false

heartbeat = 580

Firewall

If you have a firewall installed and running

sudo firewall-cmd --zone=public --permanent --add-port=4369/tcp
sudo firewall-cmd --zone=public --permanent --add-port=25672/tcp
sudo firewall-cmd --zone=public --permanent --add-port=5671-5672/tcp
sudo firewall-cmd --zone=public --permanent --add-port=15672/tcp
sudo firewall-cmd --zone=public --permanent --add-port=61613-61614/tcp
sudo firewall-cmd --zone=public --permanent --add-port=1883/tcp
sudo firewall-cmd --zone=public --permanent --add-port=8883/tcp

Reload the firewall

sudo firewall-cmd --reload

SELinux

If you have SELinux enabled

sudo setsebool -P nis_enabled 1

RabbitMQ Web Management Console

Enable RabbitMQ web management console

sudo rabbitmq-plugins enable rabbitmq_management

Modify file permissions

sudo chown -R rabbitmq:rabbitmq /var/lib/rabbitmq/

Create an admin user (Change password to a strong password)

sudo rabbitmqctl add_user admin password

Make admin user and administrator

sudo rabbitmqctl set_user_tags admin administrator

Set admin user permissions

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

To access the RabbitMQ admin

http://Your_Server_IP:15672

RabbitMQ Web Management SSL (Recommended)

Create or update rabbitmq conf file at /etc/rabbitmq/rabbitmq.conf

management.listener.port = 15672
management.listener.ssl  = true

management.listener.ssl_opts.cacertfile = /path/to/cacertfile.pem
management.listener.ssl_opts.certfile   = /path/to/certfile.pem
management.listener.ssl_opts.keyfile    = /path/to/keyfile.pem

RabbitMQ Cluster

Setup multiple RabbitMQ servers, copy script below to /usr/local/sbin/rabbitmq-cluster.sh and run the script

rabbitmq-cluster.sh

#!/bin/bash
set -e

function getHostname()
{
  local HOST=''

  while test -z "$HOST"
  do
    read -p "$1 : " HOST
  done

  echo $HOST;
}

SETUP_MASTER_SCRIPT='
rabbitmqctl stop_app;
rabbitmqctl reset;
rabbitmqctl start_app;
';

# Step 1 : Setup the Master. Get the erlang cookie

echo "Setup RabbitMQ Master";
echo "=====================";

OUT=/tmp/master.out
MASTER_HOSTNAME=$(getHostname "Enter the master server's hostname");
echo "[$MASTER_HOSTNAME] Setting up master";
ssh -t $MASTER_HOSTNAME "bash -c '$SETUP_MASTER_SCRIPT cat /var/lib/rabbitmq/.erlang.cookie;'" | tee $OUT;
COOKIE=$(cat $OUT | tail -n1)
rm $OUT;
echo "Master's Erlang Cookie : '$COOKIE'"

MASTER_IP=$(getHostname "Enter the master server's IP as seen from the slaves (Use a local IP if available)");


# Step 2 : Setup the slaves

SETUP_SLAVE_SCRIPT="
sed -i \"s/^$/$MASTER_IP    $MASTER_HOSTNAME\n/\" /etc/hosts
bash -c \"echo -n '$COOKIE' > /var/lib/rabbitmq/.erlang.cookie\";
rabbitmqctl stop_app;
rabbitmqctl reset;
rabbitmqctl join_cluster --ram rabbit@$MASTER_HOSTNAME;
rabbitmqctl start_app;
rabbitmqctl cluster_status;
";

echo "Setup RabbitMQ Slaves";
echo "=====================";

SERVER=$(getHostname "Enter slave's hostname or 'q' to quit");
while test "$SERVER" != "q"
do
  echo "Setting up slave";
  echo "ssh '$SERVER'";
  ssh -t $SERVER "bash -c '$SETUP_SLAVE_SCRIPT'";
  SERVER=$(getHostname "Enter another slave's hostname or 'q' to quit");
done

# Step 3 : Create admin user
echo "[$MASTER_HOSTNAME] Setting up admin user";
ssh -t $MASTER_HOSTNAME "bash -c 'rabbitmqctl add_user admin password'";
ssh -t $MASTER_HOSTNAME "bash -c 'rabbitmqctl set_user_tags admin administrator'";
ssh -t $MASTER_HOSTNAME "bash -c 'rabbitmqctl set_permissions -p / admin \".*\" \".*\" \".*\"'";

# Step 3 : Delete guest user
echo "[$MASTER_HOSTNAME] Removing user";
ssh -t $MASTER_HOSTNAME "bash -c 'rabbitmqctl delete_user guest'";

# Step 5 : Create sync policy
echo "[$MASTER_HOSTNAME] Synchronizing cluster";
ssh -t $MASTER_HOSTNAME $"bash -c 'rabbitmqctl set_policy -p / ha-all \"\" '\''{\"ha-mode\":\"all\",\"ha-sync-mode\":\"automatic\"}'\'''";

echo "Done";