Ansible Role: pacemaker

Description

This role helps you set up and configure a high availability (HA) cluster using pacemaker and corosync services.

Installation

To install this role, run:

ansible-galaxy install skriptfabrik.pacemaker

Requirements

No special requirements.

Role Variables

Here are the key variables you can set for this role:

Variable	Type	Default	Comments
corosync_authkey_file	string	/etc/corosync/authkey	Path to the corosync authentication key file
corosync_bindnet_interface	string		Network interface for cluster communication
corosync_cluster_name	string	corosync-cluster	Name of the corosync cluster
corosync_config_file	string	/etc/corosync/corosync.conf	Path to the corosync configuration file
corosync_log_file	string	/var/log/corosync/corosync.log	Path to the corosync log file
pacemaker_cluster_group	string		Name of the ansible host group for the cluster
pacemaker_cluster_properties	list of dictionaries		Definitions of cluster settings
pacemaker_cluster_resources	list of dictionaries		Definitions of cluster resources
pacemaker_cluster_constraints	list of dictionaries		Definitions of cluster constraints

pacemaker_cluster_properties definition

Key	Type	Default	Comments
name	string		Name of the cluster property
state	string	present	Create or update the resource if present, remove if absent
value	mixed	null	Value of the cluster property (defaults if not defined)

pacemaker_cluster_resources definition

Key	Type	Default	Comments
resource_id	string		Unique name for the cluster resource
state	string	present	Create or update if present, remove if absent
provider	string		Name of the resource provider (list available providers using pcs resource providers)
options	list of strings	[]	Optional list of options for the provider
operations	list of dictionaries	[]	Optional list of operations for the resource
stickiness	integer	0	Optional stickiness value for the resource
test_command	string	null	Optional command to test the service resource configuration

operations definition

Key	Type	Default	Comments
name	string		Name of the operation (e.g. start, stop, monitor)
state	string	present	Create or update the resource if present, remove if absent
options	list of strings	[]	Optional list of options for the operation

pacemaker_cluster_constraints definition

Key	Type	Default	Comments
type	string		Type of constraint (colocation or order)
colocation	dictionary		Settings for colocation constraints
order	dictionary		Settings for order constraints

colocation constraint definition

Key	Type	Default	Comments
state	string	present	Create or update if present, remove if absent
source_resource_id	string		Source resource id for the constraint
target_resource_id	string		Target resource id for the constraint
score	integer/string	INFINITY	Score for the constraint

order constraint definition

Key	Type	Default	Comments
first_resource	string		ID of the first resource
first_resource_action	string		Action of the first resource (e.g. start)
second_resource	string		ID of the second resource
second_resource_action	string		Optional action for the second resource (e.g. start)
options	list of strings	[]	Optional list of options for the order

Dependencies

None required.

Example Playbook

Here’s an example of how to use this role in a playbook:

- hosts: all
  roles:
    - skriptfabrik.pacemaker

Author

• Frank Giesecke

License

This project is licensed under the MIT License.

Copyright

(c) 2022, skriptfabrik GmbH