Created gce_snapshot module (#20057)
* Added support for a gce_snapshot module for managing snapshots in the Google Cloud Platform * Fixed using sys.exit in favor of fail_json. Followed the pattern in gce_pd * Fixed using sys.exit in favor of fail_json. Followed the pattern in gce_pd * Fixed an issue when dealing with multiple disks. Added a bit more documentation explaining the disks argument * Corrected a typo in the multi-disk snapshot example * Updated module to return list of changed snapshots instead of just a message. Added a RETURN block
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Rob Wagner
Ryan Brown
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lib/ansible/modules/cloud/google/gce_snapshot.py
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lib/ansible/modules/cloud/google/gce_snapshot.py
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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from ansible.module_utils.basic import AnsibleModule
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from ansible.module_utils.gce import gce_connect
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DOCUMENTATION = '''
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---
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module: gce_snapshot
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version_added: "2.3"
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short_description: Create or destroy snapshots for GCE storage volumes
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description:
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- Manages snapshots for GCE instances. This module manages snapshots for
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the storage volumes of a GCE compute instance. If there are multiple
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volumes, each snapshot will be prepended with the disk name
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options:
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instance_name:
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description:
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- The GCE instance to snapshot
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required: True
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snapshot_name:
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description:
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- The name of the snapshot to manage
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disks:
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description:
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- A list of disks to create snapshots for. If none is provided,
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all of the volumes will be snapshotted
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default: all
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required: False
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state:
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description:
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- Whether a snapshot should be C(present) or C(absent)
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required: false
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default: present
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choices: [present, absent]
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service_account_email:
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description:
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- GCP service account email for the project where the instance resides
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required: true
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credentials_file:
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description:
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- The path to the credentials file associated with the service account
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required: true
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project_id:
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description:
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- The GCP project ID to use
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required: true
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requirements:
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- "python >= 2.6"
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- "apache-libcloud >= 0.19.0"
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author: Rob Wagner (@robwagner33)
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'''
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EXAMPLES = '''
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- name: Create gce snapshot
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gce_snapshot:
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instance_name: example-instance
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snapshot_name: example-snapshot
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state: present
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service_account_email: project_name@appspot.gserviceaccount.com
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credentials_file: /path/to/credentials
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project_id: project_name
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delegate_to: localhost
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- name: Delete gce snapshot
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gce_snapshot:
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instance_name: example-instance
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snapshot_name: example-snapshot
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state: absent
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service_account_email: project_name@appspot.gserviceaccount.com
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credentials_file: /path/to/credentials
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project_id: project_name
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delegate_to: localhost
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# This example creates snapshots for only two of the available disks as
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# disk0-example-snapshot and disk1-example-snapshot
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- name: Create snapshots of specific disks
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gce_snapshot:
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instance_name: example-instance
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snapshot_name: example-snapshot
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state: present
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disks:
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- disk0
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- disk1
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service_account_email: project_name@appspot.gserviceaccount.com
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credentials_file: /path/to/credentials
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project_id: project_name
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delegate_to: localhost
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'''
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RETURN = '''
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snapshots_created:
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description: List of newly created snapshots
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returned: When snapshots are created
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type: list
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sample: "[disk0-example-snapshot, disk1-example-snapshot]"
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snapshots_deleted:
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description: List of destroyed snapshots
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returned: When snapshots are deleted
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type: list
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sample: "[disk0-example-snapshot, disk1-example-snapshot]"
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snapshots_existing:
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description: List of snapshots that already existed (no-op)
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returned: When snapshots were already present
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type: list
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sample: "[disk0-example-snapshot, disk1-example-snapshot]"
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snapshots_absent:
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description: List of snapshots that were already absent (no-op)
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returned: When snapshots were already absent
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type: list
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sample: "[disk0-example-snapshot, disk1-example-snapshot]"
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'''
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try:
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from libcloud.compute.types import Provider
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_ = Provider.GCE
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HAS_LIBCLOUD = True
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except ImportError:
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HAS_LIBCLOUD = False
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def find_snapshot(volume, name):
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'''
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Check if there is a snapshot already created with the given name for
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the passed in volume.
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Args:
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volume: A gce StorageVolume object to manage
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name: The name of the snapshot to look for
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Returns:
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The VolumeSnapshot object if one is found
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'''
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found_snapshot = None
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snapshots = volume.list_snapshots()
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for snapshot in snapshots:
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if name == snapshot.name:
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found_snapshot = snapshot
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return found_snapshot
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def main():
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module = AnsibleModule(
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argument_spec=dict(
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instance_name=dict(required=True),
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snapshot_name=dict(required=True),
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state=dict(choices=['present', 'absent'], default='present'),
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disks=dict(default=None, type='list'),
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service_account_email=dict(type='str'),
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credentials_file=dict(type='path'),
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project_id=dict(type='str')
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)
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)
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if not HAS_LIBCLOUD:
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module.fail_json(msg='libcloud with GCE support (0.19.0+) is required for this module')
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gce = gce_connect(module)
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instance_name = module.params.get('instance_name')
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snapshot_name = module.params.get('snapshot_name')
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disks = module.params.get('disks')
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state = module.params.get('state')
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json_output = dict(
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changed=False,
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snapshots_created=[],
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snapshots_deleted=[],
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snapshots_existing=[],
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snapshots_absent=[]
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)
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snapshot = None
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instance = gce.ex_get_node(instance_name, 'all')
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instance_disks = instance.extra['disks']
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for instance_disk in instance_disks:
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device_name = instance_disk['deviceName']
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if disks is None or device_name in disks:
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volume_obj = gce.ex_get_volume(device_name)
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# If we have more than one disk to snapshot, prepend the disk name
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if len(instance_disks) > 1:
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snapshot_name = device_name + "-" + snapshot_name
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snapshot = find_snapshot(volume_obj, snapshot_name)
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if snapshot and state == 'present':
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json_output['snapshots_existing'].append(snapshot_name)
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elif snapshot and state == 'absent':
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snapshot.destroy()
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json_output['changed'] = True
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json_output['snapshots_deleted'].append(snapshot_name)
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elif not snapshot and state == 'present':
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volume_obj.snapshot(snapshot_name)
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json_output['changed'] = True
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json_output['snapshots_created'].append(snapshot_name)
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elif not snapshot and state == 'absent':
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json_output['snapshots_absent'].append(snapshot_name)
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module.exit_json(**json_output)
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if __name__ == '__main__':
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main()
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