Getting started

Ansible local facts

The debops.fhs role creates a local fact script on the managed hosts which defines variables under the ansible_local.fhs.* hierarchy. Other Ansible roles can use these variables to reference the base directories managed by the debops.fhs role. This method provides a central place to control where various data (shared files, binaries, application directories, etc.) is stored in the filesystem. Furthermore, the role takes extra care to not modify existing paths once applied, to ensure that the local facts stay consistent.

An example usage of the Ansible local facts defined by the role - define path to the home directory of an application in the role default variables:

application__user: 'example-app'

application__home: '{{ (ansible_local.fhs.home | d("/var/local"))
                       + "/" + application__user }}'

Example inventory

The debops.fhs role is included in the common.yml DebOps playbook as well as the bootstrap playbooks and you don't need to do anything to apply it on the host.

Example playbook

If you are using this role without DebOps, here's an example Ansible playbook that uses the debops.fhs role:


- name: Configure base directory hierarchy
  collections: [ 'debops.debops', 'debops.roles01',
                 'debops.roles02', 'debops.roles03' ]
  hosts: [ 'debops_all_hosts', 'debops_service_fhs' ]
  become: True

  environment: '{{ inventory__environment | d({})
                   | combine(inventory__group_environment | d({}))
                   | combine(inventory__host_environment  | d({})) }}'


    - role: fhs
      tags: [ 'role::fhs', 'skip::fhs' ]

Ansible tags

You can use Ansible --tags or --skip-tags parameters to limit what tasks are performed during Ansible run. This can be used after a host was first configured to speed up playbook execution, when you are sure that most of the configuration is already in the desired state.

Available role tags:


Main role tag, should be used in the playbook to execute all of the role tasks as well as role dependencies.