zram_config

Ansible Role: Zram Config

Role to install Zram Config for compressed RAM swap.

Deprecation notice: this role is now deprecated, consider using gantsign.zswap instead.

Requirements

Ansible >= 2.7
Linux Distribution
- Debian Family
  - Ubuntu
    - Xenial (16.04)
    - Bionic (18.04)
  - Note: other versions are likely to work but have not been tested.

Role Variables

The following variables will change the behavior of this role (default values are shown below):

# Reduces the chance of Zram causing the OS to freeze when low on RAM.
# e.g. 65536
zram_config_min_free_kbytes:

# A value from 0 to 100. Setting this to a low value reduces swap use.
# Setting this to low value will also reduce OS freezes due to Zram.
# e.g. 10
zram_config_swappiness:

Example Playbook

- hosts: servers
  roles:
    - role: gantsign.zram_config
      zram_config_min_free_kbytes: 65536
      zram_config_swappiness: 10

More Roles From GantSign

You can find more roles from GantSign on Ansible Galaxy.

Development & Testing

This project uses Molecule to aid in the development and testing; the role is unit tested using Testinfra and pytest.

To develop or test you'll need to have installed the following:

Linux (e.g. Ubuntu)
Docker
Python (including python-pip)
Ansible
Molecule

Because the above can be tricky to install, this project includes Molecule Wrapper. Molecule Wrapper is a shell script that installs Molecule and it's dependencies (apart from Linux) and then executes Molecule with the command you pass it.

To test this role using Molecule Wrapper run the following command from the project root: