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