RabbitMQ

RabbitMQ playbook that enables you to spin up a simple server or cluster them together. If you are integrating this into another repo make sure that rabbitmq goes in the roles folder and that you have a top level folder called lookup_plugins with find_by_tag.py in it or this play will not be able to auto cluster. Currently only EC2 is supported but feel free to request support for other services you may want to use this with.

Requirements

Any pre-requisites that may not be covered by Ansible itself or the role should be mentioned here. For instance, if the role uses the EC2 module, it may be a good idea to mention in this section that the boto package is required.

Role Variables

---
# defaults file for rabbitmq
rabbitmq_manage: true
rabbitmq_cluster: false
make_rabbitmq_user: true

# Cluster information
# RabbitMQ (erlang.cookie)
rabbitmq_cookie: XPVTRGPZHAQYKQHKEBUF
rabbitmq_nodename: "rabbit"
rabbitmq_hostname: "{{ ansible_hostname }}.ec2.internal"
rabbitmq_nodename_suffix: .ec2.internal
rabbitmq_ec2_tag_key: Name
rabbitmq_ec2_tag_value: rabbitmq
# Must be set to true for clustering to work
rabbitmq_use_longname: "false"

# RabbitMQ user premissions
rabbitmq_configure_priv: .*
rabbitmq_read_priv: .*
rabbitmq_write_priv: .*
rabbitmq_user_state: present

# RabbitMQ (rabbitmq.config)
rabbitmq_amqp_port: 5672
rabbitmq_loopback_user: guest
rabbitmq_default_vhost: /
rabbitmq_default_user: ansible
rabbitmq_default_pass: ansible
rabbitmq_default_user_tags: administrator
rabbitmq_disk_free_limit: 0.7
rabbitmq_high_watermark: 0.4
rabbitmq_high_watermark_paging: 0.5

# User ansible is running as home dir
user_home_folder: /root

# AWS Key config
app_settings:
  rabbitmq:
    aws_access_key_id: not-a-real-key
    aws_secret_access_key: not-a-real-key

Example Playbook

Simple playbook that is enabled for use of clustering. If you are using rabbitmq_clustering you must gather facts. Never use the default key in production:

---
- hosts: localhost
  connection: local
  sudo: yes
  vars:
    rabbitmq_cluster: true
    rabbitmq_use_longname: "true"
  roles:
    - rabbitmq

Auto Clustering (EC2)

This playbook has auto clustering support built in with the exception that you need to configure a few things.

You must first create a Launch Configuration (LC) that contains a user data file available via the advanced features dropdown on the Configure Details tab. An example file that you may want to place here would look like this.

#!/bin/bash -ex
exec > >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1

echo "BEGIN USER-DATA"

# install needed packages for ansible
apt-get update -y -q
apt-get install -y -q python-paramiko python-yaml python-jinja2 python-simplejson python-setuptools
apt-get install -y -q git-core python-pip

pip install boto ansible

# setup hosts
echo "[rabbitmq]" > ~/ansible_hosts
echo "localhost" >> ~/ansible_hosts
export HOME=/root

git clone git@github.com:your_playbook/ansible.git
pushd ansible
ansible-galaxy install --role-file=requirements.galaxy --force
ansible-playbook playbook.yml  -t rabbitmq --connection=local
popd
rm -r ~/ansible ~/ansible_hosts

echo "END USER-DATA"

You must also ensure that your servers are in the same security group and have the proper ports open to each other as well as being in the same VPC. The ports that need to be open can be found in the rabbitmq documentation. You will likely only need 4369, 25672, 15672, and 5672. If you are having issues open up all ports to everything for testing to ensure the security group is not the issue.

Add the LC you have made to an Auto Scale Group (ASG) and set the number of servers to spin up.

License

BSD

Author Information

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