Ansible Role: Redis

Installs Redis Server on Debian.

Minimalistic version of a multi-config redis role for debian-based distreos, with tight test coverage using molecule (so you can test locally with minimal effort) and a docker compatible layer if you wanted to build it on top of a docker container.

It will create separate config files (located under /etc/redis/redis-{{name}}.conf), as well as stand-alone /var/log/redis/ logging points for each config defined.

The role is perfect for dev purposes to test multiple configurations on a single machine, as well as for live deployments with it's minimalistic fully-molecule-covered and linted code.

Leverages systemctl on lxd/baremetal and simple init.d on docker.

Requirements

No dependencies.

Coverage

Currently builds and integrates on latest debian-based distros:

Ubuntu: 18.04, 16.04

Debian: stretch

Variables

defaults

redis_package_name: "redis-server"  

redis_configs:
  - port: 6380      # port to listen on   
    name: "cache"   # configuration name - will also affect logfile (/var/log/redis) and pidfile target names
    bind: 127.0.0.1 # which ip to bind to (localhost being the safest option for self-service)

a sample multiconfig

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  
    # beware the last one will open up 8080 to the outside world, 
    # so will need a separate hardening rules (not included in this role)        

Currently the role installs whatever latest stable version lives in supported distros' upstreams.

Example playbook

when 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

when 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

• https://molecule.readthedocs.io/en/latest/installation.html
• specific molecule LXD install doc
• specific molecule docker install doc

Testing with low-level LXD chroot containers

molecule test

Testing against docker base images

molecule test --scenario-name=docker_dev

Additional perks from molecule

Remember you can also do crazy stuff like molecule converge to simply bring instance(s) at will and then tear them down with molecule destroy. The sky is the limit here really!

Sponsored by

Kwiziq.com - The AI language education platform

Spottmedia.com - Technology design, delivery and consulting

Author Information

made with love by Grzegorz Nowak.