Ansible Role: Redis

This role installs Redis Server on Debian systems.

It's a simple version for setting up multiple Redis configurations on Debian-based systems. It includes thorough testing with Molecule, which allows you to test easily on your local machine. There's also a Docker option if you want to use a container.

The role will create separate configuration files in /etc/redis/redis-{{name}}.conf and log files in /var/log/redis/ for each configuration.

This role is great for development purposes to try out various configurations on a single machine, as well as for real deployments, thanks to its clean, well-tested code.

It uses systemctl for LXD or bare-metal setups, and init.d for Docker.

Requirements

No additional dependencies needed.

Coverage

This role works with the latest Debian-based distributions:

• Ubuntu: 18.04, 16.04
• Debian: Stretch

Variables

Defaults

• redis_package_name: "redis-server"

• redis_configs:

  • port: 6380 # Listening port
  • name: "cache" # Name of the configuration (affects log and pid file names)
  • bind: 127.0.0.1 # IP address to bind (using localhost is safest)

Example of multiple configurations

redis_configs:
  - port: 6379
    name: "cache"
    bind: 127.0.0.1   
  - port: 6380
    name: "session"
    bind: 127.0.0.1
  - port: 8080
    name: "shared-cache"
    bind: 0.0.0.0  

Note: The last configuration opens port 8080 to the internet, so you will need to implement separate security measures (not included in this role).

The role will install the latest stable version available for supported distributions.

Example Playbook

Cloning from GitHub

---
- hosts: all
  vars:
    redis_configs:
      - port: 6379
        name: "cache0"
        bind: 127.0.0.1
      - port: 6380
        name: "cache1"
        bind: 127.0.0.1
  roles:
    - role: ansible-redis

From Ansible Galaxy

---
- hosts: all
  vars:
    redis_configs:
      - port: 6379
        name: "cache0"
        bind: 127.0.0.1
      - port: 6380
        name: "cache1"
        bind: 127.0.0.1
  roles:
    - role: grzegorznowak.redis        

Testing

Requirements

• Molecule Installation Guide
• Molecule LXD Installation Document
• Molecule Docker Installation Document

Testing with LXD Containers

molecule test

Testing with Docker Base Images

molecule test --scenario-name=docker_dev

Additional Features from Molecule

You can use commands like molecule converge to launch instances as you like, and then use molecule destroy to remove them. The possibilities are extensive!

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Spottmedia.com - Technology design, delivery, and consulting

Author Information

Created with care by Grzegorz Nowak.