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d9e734d662
* add a warning when ansible_label is not found on a secret. addresses #30
* Update changelogs/fragments/31-docker-secret.yml
Co-authored-by: Felix Fontein <felix@fontein.de>
Co-authored-by: Felix Fontein <felix@fontein.de>
Backported from 22ba76b4e9
302 lines
9.2 KiB
Python
302 lines
9.2 KiB
Python
#!/usr/bin/python
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#
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# Copyright 2016 Red Hat | Ansible
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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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: docker_secret
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short_description: Manage docker secrets.
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description:
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- Create and remove Docker secrets in a Swarm environment. Similar to C(docker secret create) and C(docker secret rm).
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- Adds to the metadata of new secrets 'ansible_key', an encrypted hash representation of the data, which is then used
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in future runs to test if a secret has changed. If 'ansible_key is not present, then a secret will not be updated
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unless the I(force) option is set.
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- Updates to secrets are performed by removing the secret and creating it again.
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options:
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data:
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description:
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- The value of the secret. Required when state is C(present).
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type: str
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data_is_b64:
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description:
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- If set to C(true), the data is assumed to be Base64 encoded and will be
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decoded before being used.
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- To use binary I(data), it is better to keep it Base64 encoded and let it
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be decoded by this option.
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type: bool
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default: no
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labels:
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description:
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- "A map of key:value meta data, where both key and value are expected to be strings."
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- If new meta data is provided, or existing meta data is modified, the secret will be updated by removing it and creating it again.
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type: dict
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force:
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description:
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- Use with state C(present) to always remove and recreate an existing secret.
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- If C(true), an existing secret will be replaced, even if it has not changed.
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type: bool
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default: no
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name:
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description:
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- The name of the secret.
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type: str
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required: yes
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state:
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description:
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- Set to C(present), if the secret should exist, and C(absent), if it should not.
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type: str
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default: present
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choices:
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- absent
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- present
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extends_documentation_fragment:
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- community.general.docker
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- community.general.docker.docker_py_2_documentation
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requirements:
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- "L(Docker SDK for Python,https://docker-py.readthedocs.io/en/stable/) >= 2.1.0"
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- "Docker API >= 1.25"
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author:
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- Chris Houseknecht (@chouseknecht)
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'''
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EXAMPLES = '''
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- name: Create secret foo (from a file on the control machine)
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community.general.docker_secret:
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name: foo
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# If the file is JSON or binary, Ansible might modify it (because
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# it is first decoded and later re-encoded). Base64-encoding the
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# file directly after reading it prevents this to happen.
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data: "{{ lookup('file', '/path/to/secret/file') | b64encode }}"
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data_is_b64: true
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state: present
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- name: Change the secret data
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community.general.docker_secret:
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name: foo
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data: Goodnight everyone!
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labels:
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bar: baz
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one: '1'
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state: present
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- name: Add a new label
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community.general.docker_secret:
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name: foo
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data: Goodnight everyone!
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labels:
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bar: baz
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one: '1'
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# Adding a new label will cause a remove/create of the secret
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two: '2'
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state: present
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- name: No change
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community.general.docker_secret:
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name: foo
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data: Goodnight everyone!
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labels:
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bar: baz
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one: '1'
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# Even though 'two' is missing, there is no change to the existing secret
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state: present
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- name: Update an existing label
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community.general.docker_secret:
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name: foo
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data: Goodnight everyone!
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labels:
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bar: monkey # Changing a label will cause a remove/create of the secret
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one: '1'
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state: present
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- name: Force the removal/creation of the secret
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community.general.docker_secret:
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name: foo
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data: Goodnight everyone!
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force: yes
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state: present
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- name: Remove secret foo
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community.general.docker_secret:
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name: foo
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state: absent
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'''
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RETURN = '''
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secret_id:
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description:
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- The ID assigned by Docker to the secret object.
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returned: success and I(state) is C(present)
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type: str
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sample: 'hzehrmyjigmcp2gb6nlhmjqcv'
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'''
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import base64
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import hashlib
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import traceback
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try:
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from docker.errors import DockerException, APIError
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except ImportError:
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# missing Docker SDK for Python handled in ansible.module_utils.docker.common
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pass
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from ansible_collections.community.general.plugins.module_utils.docker.common import (
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AnsibleDockerClient,
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DockerBaseClass,
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compare_generic,
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RequestException,
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)
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from ansible.module_utils._text import to_native, to_bytes
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class SecretManager(DockerBaseClass):
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def __init__(self, client, results):
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super(SecretManager, self).__init__()
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self.client = client
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self.results = results
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self.check_mode = self.client.check_mode
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parameters = self.client.module.params
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self.name = parameters.get('name')
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self.state = parameters.get('state')
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self.data = parameters.get('data')
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if self.data is not None:
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if parameters.get('data_is_b64'):
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self.data = base64.b64decode(self.data)
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else:
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self.data = to_bytes(self.data)
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self.labels = parameters.get('labels')
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self.force = parameters.get('force')
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self.data_key = None
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def __call__(self):
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if self.state == 'present':
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self.data_key = hashlib.sha224(self.data).hexdigest()
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self.present()
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elif self.state == 'absent':
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self.absent()
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def get_secret(self):
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''' Find an existing secret. '''
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try:
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secrets = self.client.secrets(filters={'name': self.name})
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except APIError as exc:
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self.client.fail("Error accessing secret %s: %s" % (self.name, to_native(exc)))
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for secret in secrets:
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if secret['Spec']['Name'] == self.name:
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return secret
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return None
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def create_secret(self):
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''' Create a new secret '''
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secret_id = None
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# We can't see the data after creation, so adding a label we can use for idempotency check
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labels = {
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'ansible_key': self.data_key
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}
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if self.labels:
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labels.update(self.labels)
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try:
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if not self.check_mode:
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secret_id = self.client.create_secret(self.name, self.data, labels=labels)
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except APIError as exc:
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self.client.fail("Error creating secret: %s" % to_native(exc))
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if isinstance(secret_id, dict):
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secret_id = secret_id['ID']
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return secret_id
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def present(self):
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''' Handles state == 'present', creating or updating the secret '''
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secret = self.get_secret()
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if secret:
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self.results['secret_id'] = secret['ID']
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data_changed = False
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attrs = secret.get('Spec', {})
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if attrs.get('Labels', {}).get('ansible_key'):
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if attrs['Labels']['ansible_key'] != self.data_key:
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data_changed = True
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else:
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if not self.force:
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self.client.module.warn("'ansible_key' label not found. Secret will not be changed unless the force parameter is set to 'yes'")
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labels_changed = not compare_generic(self.labels, attrs.get('Labels'), 'allow_more_present', 'dict')
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if data_changed or labels_changed or self.force:
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# if something changed or force, delete and re-create the secret
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self.absent()
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secret_id = self.create_secret()
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self.results['changed'] = True
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self.results['secret_id'] = secret_id
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else:
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self.results['changed'] = True
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self.results['secret_id'] = self.create_secret()
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def absent(self):
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''' Handles state == 'absent', removing the secret '''
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secret = self.get_secret()
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if secret:
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try:
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if not self.check_mode:
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self.client.remove_secret(secret['ID'])
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except APIError as exc:
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self.client.fail("Error removing secret %s: %s" % (self.name, to_native(exc)))
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self.results['changed'] = True
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def main():
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argument_spec = dict(
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name=dict(type='str', required=True),
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state=dict(type='str', default='present', choices=['absent', 'present']),
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data=dict(type='str', no_log=True),
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data_is_b64=dict(type='bool', default=False),
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labels=dict(type='dict'),
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force=dict(type='bool', default=False)
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)
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required_if = [
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('state', 'present', ['data'])
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]
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client = AnsibleDockerClient(
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argument_spec=argument_spec,
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supports_check_mode=True,
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required_if=required_if,
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min_docker_version='2.1.0',
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min_docker_api_version='1.25',
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)
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try:
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results = dict(
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changed=False,
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secret_id=''
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)
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SecretManager(client, results)()
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client.module.exit_json(**results)
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except DockerException as e:
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client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
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except RequestException as e:
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client.fail('An unexpected requests error occurred when docker-py tried to talk to the docker daemon: {0}'.format(e), exception=traceback.format_exc())
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if __name__ == '__main__':
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main()
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