This project creates an Amazon Machine Image with MongoDB pre-installed and ready to be joined to a replica set.
- a working Packer installation
- a working Ansible installation
- a working Bash installation
- your AWS IAM keys exported to the environment
- AWS_ACCESS_KEY_ID
- AWS_SECRET_ACCESS_KEY
- AWS_REGION
Testing was done under Ubuntu 16.04 Linux.
Typing ./build.sh will run Packer and build out an AMI image which can be used in
CloudFormation templates.
Configurable values are located in variables.json. You may edit these as need to customize the template.
Other than the prerequisites, there is nothing to install. The script will install into the region's AMI registry.
The playbook reuses logic from open source Ansible roles. Consult those playbooks to learn exactly how certain aspects of the plays are configured.
Creating the AMI requires that two different tools coordinate with each other. In particular,
when creating and manipulating the EBS storage volumes. Packer is where the volumes are created
and Ansible is where they are formatted. You need to ensure that both the mongodb.json and
playbook.yml files are in harmony with each other or failures will occur.
One place to look is to verify that /var/run/mongodb exists. That is where MongoDB stores its PID
file and that directory does not exist on a new EC2 instance. We have adjusted the systemd configuration
to recreate the directory prior to MongoDB starting. If, for some reason, you need to run the steps by
hand, this is what the script does:
#!/bin/bash
mkdir -p /var/run/mongodb
chown mongod:mongod /var/run/mongodb
This should create the missing directory.
This project is licensed under the Apache License Version 2.0, January 2004.