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ead23a1f38
pacemaker_cluster: implement check mode (#8081)
* Implement check mode for pacemaker_cluster.
* Fix restart code.
Co-authored-by: Mario Lenz <m@riolenz.de>
---------
Co-authored-by: Mario Lenz <m@riolenz.de>
(cherry picked from commit 17e275bc0b)
Co-authored-by: Felix Fontein <felix@fontein.de>
238 lines
7.3 KiB
Python
238 lines
7.3 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# Copyright (c) 2016, Mathieu Bultel <mbultel@redhat.com>
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# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
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# SPDX-License-Identifier: GPL-3.0-or-later
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from __future__ import absolute_import, division, print_function
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__metaclass__ = type
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DOCUMENTATION = '''
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---
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module: pacemaker_cluster
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short_description: Manage pacemaker clusters
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author:
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- Mathieu Bultel (@matbu)
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description:
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- This module can manage a pacemaker cluster and nodes from Ansible using
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the pacemaker cli.
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extends_documentation_fragment:
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- community.general.attributes
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attributes:
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check_mode:
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support: full
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diff_mode:
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support: none
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options:
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state:
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description:
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- Indicate desired state of the cluster
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choices: [ cleanup, offline, online, restart ]
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type: str
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node:
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description:
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- Specify which node of the cluster you want to manage. None == the
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cluster status itself, 'all' == check the status of all nodes.
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type: str
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timeout:
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description:
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- Timeout when the module should considered that the action has failed
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default: 300
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type: int
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force:
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description:
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- Force the change of the cluster state
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type: bool
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default: true
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'''
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EXAMPLES = '''
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---
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- name: Set cluster Online
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hosts: localhost
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gather_facts: false
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tasks:
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- name: Get cluster state
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community.general.pacemaker_cluster:
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state: online
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'''
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RETURN = '''
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changed:
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description: true if the cluster state has changed
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type: bool
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returned: always
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out:
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description: The output of the current state of the cluster. It return a
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list of the nodes state.
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type: str
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sample: 'out: [[" overcloud-controller-0", " Online"]]}'
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returned: always
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rc:
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description: exit code of the module
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type: bool
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returned: always
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'''
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import time
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from ansible.module_utils.basic import AnsibleModule
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_PCS_CLUSTER_DOWN = "Error: cluster is not currently running on this node"
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def get_cluster_status(module):
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cmd = "pcs cluster status"
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rc, out, err = module.run_command(cmd)
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if out in _PCS_CLUSTER_DOWN:
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return 'offline'
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else:
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return 'online'
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def get_node_status(module, node='all'):
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if node == 'all':
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cmd = "pcs cluster pcsd-status %s" % node
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else:
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cmd = "pcs cluster pcsd-status"
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rc, out, err = module.run_command(cmd)
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if rc == 1:
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module.fail_json(msg="Command execution failed.\nCommand: `%s`\nError: %s" % (cmd, err))
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status = []
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for o in out.splitlines():
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status.append(o.split(':'))
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return status
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def clean_cluster(module, timeout):
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cmd = "pcs resource cleanup"
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rc, out, err = module.run_command(cmd)
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if rc == 1:
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module.fail_json(msg="Command execution failed.\nCommand: `%s`\nError: %s" % (cmd, err))
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def set_cluster(module, state, timeout, force):
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if state == 'online':
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cmd = "pcs cluster start"
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if state == 'offline':
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cmd = "pcs cluster stop"
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if force:
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cmd = "%s --force" % cmd
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rc, out, err = module.run_command(cmd)
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if rc == 1:
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module.fail_json(msg="Command execution failed.\nCommand: `%s`\nError: %s" % (cmd, err))
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t = time.time()
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ready = False
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while time.time() < t + timeout:
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cluster_state = get_cluster_status(module)
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if cluster_state == state:
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ready = True
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break
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if not ready:
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module.fail_json(msg="Failed to set the state `%s` on the cluster\n" % (state))
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def set_node(module, state, timeout, force, node='all'):
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# map states
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if state == 'online':
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cmd = "pcs cluster start"
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if state == 'offline':
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cmd = "pcs cluster stop"
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if force:
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cmd = "%s --force" % cmd
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nodes_state = get_node_status(module, node)
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for node in nodes_state:
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if node[1].strip().lower() != state:
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cmd = "%s %s" % (cmd, node[0].strip())
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rc, out, err = module.run_command(cmd)
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if rc == 1:
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module.fail_json(msg="Command execution failed.\nCommand: `%s`\nError: %s" % (cmd, err))
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t = time.time()
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ready = False
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while time.time() < t + timeout:
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nodes_state = get_node_status(module)
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for node in nodes_state:
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if node[1].strip().lower() == state:
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ready = True
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break
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if not ready:
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module.fail_json(msg="Failed to set the state `%s` on the cluster\n" % (state))
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def main():
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argument_spec = dict(
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state=dict(type='str', choices=['online', 'offline', 'restart', 'cleanup']),
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node=dict(type='str'),
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timeout=dict(type='int', default=300),
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force=dict(type='bool', default=True),
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)
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module = AnsibleModule(
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argument_spec,
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supports_check_mode=True,
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)
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changed = False
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state = module.params['state']
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node = module.params['node']
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force = module.params['force']
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timeout = module.params['timeout']
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if state in ['online', 'offline']:
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# Get cluster status
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if node is None:
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cluster_state = get_cluster_status(module)
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if cluster_state == state:
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module.exit_json(changed=changed, out=cluster_state)
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else:
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if module.check_mode:
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module.exit_json(changed=True)
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set_cluster(module, state, timeout, force)
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cluster_state = get_cluster_status(module)
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if cluster_state == state:
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module.exit_json(changed=True, out=cluster_state)
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else:
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module.fail_json(msg="Fail to bring the cluster %s" % state)
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else:
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cluster_state = get_node_status(module, node)
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# Check cluster state
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for node_state in cluster_state:
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if node_state[1].strip().lower() == state:
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module.exit_json(changed=changed, out=cluster_state)
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else:
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if module.check_mode:
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module.exit_json(changed=True)
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# Set cluster status if needed
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set_cluster(module, state, timeout, force)
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cluster_state = get_node_status(module, node)
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module.exit_json(changed=True, out=cluster_state)
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if state in ['restart']:
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if module.check_mode:
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module.exit_json(changed=True)
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set_cluster(module, 'offline', timeout, force)
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cluster_state = get_cluster_status(module)
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if cluster_state == 'offline':
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set_cluster(module, 'online', timeout, force)
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cluster_state = get_cluster_status(module)
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if cluster_state == 'online':
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module.exit_json(changed=True, out=cluster_state)
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else:
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module.fail_json(msg="Failed during the restart of the cluster, the cluster can't be started")
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else:
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module.fail_json(msg="Failed during the restart of the cluster, the cluster can't be stopped")
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if state in ['cleanup']:
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if module.check_mode:
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module.exit_json(changed=True)
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clean_cluster(module, timeout)
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cluster_state = get_cluster_status(module)
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module.exit_json(changed=True,
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out=cluster_state)
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if __name__ == '__main__':
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main()
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