stone-payments.mongodb

Role for Ansible which manages MongoDB in a standalone setup or replica set.

Supported systems

To conserve development efforts, we decided that a supported distro should:

• be currently supported by the distro-maker (aka not in EOL);
• be currently supported by MongoDB.org (this requirement will probably be dropped soon);
• be systemd-based;
• have a wide-enough user-base.

Therefore, the supported systems list is currently:

• Enterprise Linux (both CentOS and RHEL)
  • 7.2
  • 7.3
  • 7.4
• Ubuntu
  • 16.04

Further distros may be added upon request, as long as the requirements are met.

Usage

Quickstart

There's absolute no variable needed to setup a basic, passwordless, loopback-only, standalone MongoDB setup. Just include it in a play:

- name: install mongodb
  hosts: all
  roles: stone-payments.mongodb

Replica set setup

In order to build a replica set, you need to inform the master that he is a master, and a replica on which master to connect to. You can do all this with the following excerpt:

- name: install mongodb replica set
  host: all
  roles: stone-payments.mongodb
  vars:
    mongodb_conf_bindIp: "0.0.0.0"
    mongodb_replSet_name: "someReplicaSetName"
    mongodb_replSet_master: "1.2.3.4"
    mongodb_replSet_isMaster: "{{ true if mongodb_replSet_master in ansible_all_ipv4_addresses else false }}"

Logging

You can set any systemLog option by providing mongodb_conf_logging dictionary:

- name: install mongodb with network debug logging
  host: all
  roles: stone-payments.mongodb
  vars:
    mongodb_conf_logging:
      verbosity: 0
      component:
        network:
          verbosity: 5
      destination: file
      path: /var/log/mongodb/mongod.log

Other configs

I believe almost every other config is self-explanatory or directly related to a MongoDB core feature. Simply override the configs on defaults/main.yml and they will be (hopefully) applied to your system.

Testing

This role implements unit tests with Molecule on Docker. Notice that we only support Molecule 2.0 or greater. You can install molecule with:

pip install molecule

The Docker installation and configuration is out of scope.

After having Molecule setup, you can run the tests with:

molecule converge

Contributing

Just open a PR. We love PRs!

To Do List

Here's some suggestions on what to do:

• Support use of distro-packaged MongoDB.
• Support Ubuntu Zesty and Artful.
• Write further standalone tests with serverspec or testinfra.
• Write a test case for the replica set.

License

This role is distributed under the MIT license.