bc.hcloud

This role can be used to provision and manage hosts, volumes and SSH keys in the Hetzner Cloud.

Requirements

Access to the API is given via a token, which needs to be defined on the Hetzner Console. The token is specific to a project and should be made available to ansible on the control machine via the HCLOUD_API environment variable.

Role Variables

The cluster configuration is given by the variable nodes, which should contain an array of dictionary items. Each list element contains one or more hosts to be deployed. This can be used to aggregate nodes according to their typology. Each node item will be sent with one single hcloud_server task, allowing the creation or destruction of multiple servers at once (read the hcloud_server module documentation for more information).

Here is a definition of nodes:

nodes:
  - name:
      - serverA
      - serverB
    type: cx11
    profile: web  
  - name:
      - serverC
    type: cx11-ceph
    profile: storage
    volumes:
      - mount: srv
        size: 20

Note: currently only one volume per host is supported, due to an issue with the getvolumes-json.sh script

The variable cluster_state further controls whether the cluster hosts should be present or absent.

Furthermore, you need to set at least one key from the control user in the hcloud_ssh_keys array, in order for the role to successfully access and prepare the new hosts. This defaults to ~/.ssh/id_rsa.pub.

Following are the vars defaults for this role:

nodes: []
cluster_state: present
default_image: ubuntu-18.04
default_location: nbg11
default_type: cx11
hcloud_ssh_keys:
  - "{{ lookup('file', '~/.ssh/id_rsa.pub' )}}"

Dependencies

The hcloud-ansible modules are used and have been added to the role under library/ for convenience.

Due to limitations on the hcloud_server module (no support for volumes and labels), this role currently uses the hcloud-cli (included in the role under files/ for convenience).

Example Playbook

    - hosts: all
      roles:
         - { role: bc.hcloud, state: present }

License

GNU GPLv3

Author Information

• Gualter Barbas Baptista @gandhiano gualter [at] ecobytes.net
• Michael Langfermann @versable versable [at] gmail.com