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Stefan Bethke 2026-02-06 22:07:16 +01:00
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#!/usr/bin/python
#
# Copyright 2016 Red Hat | Ansible
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later
from __future__ import annotations
DOCUMENTATION = r"""
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 C(ansible_key), an encrypted hash representation of the data, which is then used in
future runs to test if a secret has changed. If C(ansible_key) is not present, then a secret will not be updated unless
the O(force) option is set.
- Updates to secrets are performed by removing the secret and creating it again.
extends_documentation_fragment:
- community.docker._docker
- community.docker._docker.docker_py_2_documentation
- community.docker._attributes
- community.docker._attributes.actiongroup_docker
attributes:
check_mode:
support: full
diff_mode:
support: none
idempotent:
support: partial
details:
- If O(force=true) the module is not idempotent.
options:
data:
description:
- The value of the secret.
- Mutually exclusive with O(data_src). One of O(data) and O(data_src) is required if O(state=present).
type: str
data_is_b64:
description:
- If set to V(true), the data is assumed to be Base64 encoded and will be decoded before being used.
- To use binary O(data), it is better to keep it Base64 encoded and let it be decoded by this option.
type: bool
default: false
data_src:
description:
- The file on the target from which to read the secret.
- Mutually exclusive with O(data). One of O(data) and O(data_src) is required if O(state=present).
type: path
version_added: 1.10.0
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 O(state=present) to always remove and recreate an existing secret.
- If V(true), an existing secret will be replaced, even if it has not changed.
type: bool
default: false
rolling_versions:
description:
- If set to V(true), secrets are created with an increasing version number appended to their name.
- Adds a label containing the version number to the managed secrets with the name C(ansible_version).
type: bool
default: false
version_added: 2.2.0
versions_to_keep:
description:
- When using O(rolling_versions), the number of old versions of the secret to keep.
- Extraneous old secrets are deleted after the new one is created.
- Set to V(-1) to keep everything or to V(0) or V(1) to keep only the current one.
type: int
default: 5
version_added: 2.2.0
name:
description:
- The name of the secret.
type: str
required: true
state:
description:
- Set to V(present), if the secret should exist, and V(absent), if it should not.
type: str
default: present
choices:
- absent
- present
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 = r"""
---
- 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: Create secret foo (from a file on the target machine)
community.docker.docker_secret:
name: foo
data_src: /path/to/secret/file
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: true
state: present
- name: Remove secret foo
community.docker.docker_secret:
name: foo
state: absent
"""
RETURN = r"""
secret_id:
description:
- The ID assigned by Docker to the secret object.
returned: success and O(state=present)
type: str
sample: 'hzehrmyjigmcp2gb6nlhmjqcv'
secret_name:
description:
- The name of the created secret object.
returned: success and O(state=present)
type: str
sample: 'awesome_secret'
version_added: 2.2.0
"""
import base64
import hashlib
import traceback
import typing as t
try:
from docker.errors import APIError, DockerException
except ImportError:
# missing Docker SDK for Python handled in ansible.module_utils.docker.common
pass
from ansible.module_utils.common.text.converters import to_bytes
from ansible_collections.community.docker.plugins.module_utils._common import (
AnsibleDockerClient,
RequestException,
)
from ansible_collections.community.docker.plugins.module_utils._util import (
DockerBaseClass,
compare_generic,
sanitize_labels,
)
class SecretManager(DockerBaseClass):
def __init__(self, client: AnsibleDockerClient, results: dict[str, t.Any]) -> None:
super().__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)
data_src = parameters.get("data_src")
if data_src is not None:
try:
with open(data_src, "rb") as f:
self.data = f.read()
except Exception as exc: # pylint: disable=broad-exception-caught
self.client.fail(f"Error while reading {data_src}: {exc}")
self.labels = parameters.get("labels")
self.force = parameters.get("force")
self.rolling_versions = parameters.get("rolling_versions")
self.versions_to_keep = parameters.get("versions_to_keep")
if self.rolling_versions:
self.version = 0
self.data_key: str | None = None
self.secrets: list[dict[str, t.Any]] = []
def __call__(self) -> None:
self.get_secret()
if self.state == "present":
self.data_key = hashlib.sha224(self.data).hexdigest()
self.present()
self.remove_old_versions()
elif self.state == "absent":
self.absent()
def get_version(self, secret: dict[str, t.Any]) -> int:
try:
return int(
secret.get("Spec", {}).get("Labels", {}).get("ansible_version", 0)
)
except ValueError:
return 0
def remove_old_versions(self) -> None:
if not self.rolling_versions or self.versions_to_keep < 0:
return
if not self.check_mode:
while len(self.secrets) > max(self.versions_to_keep, 1):
self.remove_secret(self.secrets.pop(0))
def get_secret(self) -> None:
"""Find an existing secret."""
try:
secrets = self.client.secrets(filters={"name": self.name})
except APIError as exc:
self.client.fail(f"Error accessing secret {self.name}: {exc}")
if self.rolling_versions:
self.secrets = [
secret
for secret in secrets
if secret["Spec"]["Name"].startswith(f"{self.name}_v")
]
self.secrets.sort(key=self.get_version)
else:
self.secrets = [
secret for secret in secrets if secret["Spec"]["Name"] == self.name
]
def create_secret(self) -> str | None:
"""Create a new secret"""
secret_id: str | dict[str, t.Any] | None = None
# We cannot see the data after creation, so adding a label we can use for idempotency check
labels = {"ansible_key": self.data_key}
if self.rolling_versions:
self.version += 1
labels["ansible_version"] = str(self.version)
self.name = f"{self.name}_v{self.version}"
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
)
self.secrets += self.client.secrets(filters={"id": secret_id})
except APIError as exc:
self.client.fail(f"Error creating secret: {exc}")
if isinstance(secret_id, dict):
return secret_id["ID"]
return secret_id
def remove_secret(self, secret: dict[str, t.Any]) -> None:
try:
if not self.check_mode:
self.client.remove_secret(secret["ID"])
except APIError as exc:
self.client.fail(f"Error removing secret {secret['Spec']['Name']}: {exc}")
def present(self) -> None:
"""Handles state == 'present', creating or updating the secret"""
if self.secrets:
secret = self.secrets[-1]
self.results["secret_id"] = secret["ID"]
self.results["secret_name"] = secret["Spec"]["Name"]
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 'true'"
)
labels_changed = not compare_generic(
self.labels, attrs.get("Labels"), "allow_more_present", "dict"
)
if self.rolling_versions:
self.version = self.get_version(secret)
if data_changed or labels_changed or self.force:
# if something changed or force, delete and re-create the secret
if not self.rolling_versions:
self.absent()
secret_id = self.create_secret()
self.results["changed"] = True
self.results["secret_id"] = secret_id
self.results["secret_name"] = self.name
else:
self.results["changed"] = True
self.results["secret_id"] = self.create_secret()
self.results["secret_name"] = self.name
def absent(self) -> None:
"""Handles state == 'absent', removing the secret"""
if self.secrets:
for secret in self.secrets:
self.remove_secret(secret)
self.results["changed"] = True
def main() -> None:
argument_spec = {
"name": {"type": "str", "required": True},
"state": {
"type": "str",
"default": "present",
"choices": ["absent", "present"],
},
"data": {"type": "str", "no_log": True},
"data_is_b64": {"type": "bool", "default": False},
"data_src": {"type": "path"},
"labels": {"type": "dict"},
"force": {"type": "bool", "default": False},
"rolling_versions": {"type": "bool", "default": False},
"versions_to_keep": {"type": "int", "default": 5},
}
required_if = [
("state", "present", ["data", "data_src"], True),
]
mutually_exclusive = [
("data", "data_src"),
]
client = AnsibleDockerClient(
argument_spec=argument_spec,
supports_check_mode=True,
required_if=required_if,
mutually_exclusive=mutually_exclusive,
min_docker_version="2.1.0",
)
sanitize_labels(client.module.params["labels"], "labels", client)
try:
results = {"changed": False, "secret_id": "", "secret_name": ""}
SecretManager(client, results)()
client.module.exit_json(**results)
except DockerException as e:
client.fail(
f"An unexpected Docker error occurred: {e}",
exception=traceback.format_exc(),
)
except RequestException as e:
client.fail(
f"An unexpected requests error occurred when Docker SDK for Python tried to talk to the docker daemon: {e}",
exception=traceback.format_exc(),
)
if __name__ == "__main__":
main()