kubernetes.core.k8s module – Manage Kubernetes (K8s) objects
Note
This module is part of the kubernetes.core collection (version 3.2.0).
You might already have this collection installed if you are using the ansible package.
It is not included in ansible-core.
To check whether it is installed, run ansible-galaxy collection list.
To install it, use: ansible-galaxy collection install kubernetes.core.
You need further requirements to be able to use this module,
see Requirements for details.
To use it in a playbook, specify: kubernetes.core.k8s.
Synopsis
Use the Kubernetes Python client to perform CRUD operations on K8s objects.
Pass the object definition from a source file or inline. See examples for reading files and using Jinja templates or vault-encrypted files.
Access to the full range of K8s APIs.
Use the kubernetes.core.k8s_info module to obtain a list of items about an object of type
kindAuthenticate using either a config file, certificates, password or token.
Supports check mode.
Note
This module has a corresponding action plugin.
Requirements
The below requirements are needed on the host that executes this module.
python >= 3.9
kubernetes >= 24.2.0
PyYAML >= 3.11
jsonpatch
Parameters
Parameter |
Comments |
|---|---|
Token used to authenticate with the API. Can also be specified via K8S_AUTH_API_KEY environment variable. |
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Use to specify the API version. Use to create, delete, or discover an object without providing a full resource definition. Use in conjunction with kind, name, and namespace to identify a specific object. If resource definition is provided, the apiVersion value from the resource_definition will override this option. Default: |
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Whether to append a hash to a resource name for immutability purposes Applies only to ConfigMap and Secret resources The parameter will be silently ignored for other resource kinds The full definition of an object is needed to generate the hash - this means that deleting an object created with append_hash will only work if the same object is passed with state=absent (alternatively, just use state=absent with the name including the generated hash and append_hash=no) Choices:
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mutually exclusive with Choices:
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Path to a CA certificate used to authenticate with the API. The full certificate chain must be provided to avoid certificate validation errors. Can also be specified via K8S_AUTH_SSL_CA_CERT environment variable. |
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Path to a certificate used to authenticate with the API. Can also be specified via K8S_AUTH_CERT_FILE environment variable. |
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Path to a key file used to authenticate with the API. Can also be specified via K8S_AUTH_KEY_FILE environment variable. |
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The name of a context found in the config file. Can also be specified via K8S_AUTH_CONTEXT environment variable. |
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Whether to continue on creation/deletion errors when multiple resources are defined. This has no effect on the validation step which is controlled by the Choices:
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When this option is set to true and state=absent, module will delete all resources of the specified resource type in the requested namespace. Ignored when Parameter This parameter can be used with Choices:
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Configure behavior when deleting an object. Only used when state=absent. |
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Specify how many seconds to wait before forcefully terminating. Only implemented for Pod resources. If not specified, the default grace period for the object type will be used. |
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Specify condition that must be met for delete to proceed. |
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Specify the resource version of the target object. |
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Specify the UID of the target object. |
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Use to control how dependent objects are deleted. If not specified, the default policy for the object type will be used. This may vary across object types. Choices:
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If set to Choices:
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Use to specify the basis of an object name and random characters will be added automatically on server to generate a unique name. This option is ignored when state is not set to If resource definition is provided, the metadata.generateName value from the resource_definition will override this option. If resource definition is provided, and contains metadata.name, this option is ignored. mutually exclusive with |
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Hide fields matching this option in the result An example might be Only field definitions that don’t reference list items are supported (so |
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Provide a URL for accessing the API. Can also be specified via K8S_AUTH_HOST environment variable. |
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Group(s) to impersonate for the operation. Can also be specified via K8S_AUTH_IMPERSONATE_GROUPS environment. Example: Group1,Group2 |
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Username to impersonate for the operation. Can also be specified via K8S_AUTH_IMPERSONATE_USER environment. |
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Use to specify an object model. Use to create, delete, or discover an object without providing a full resource definition. Use in conjunction with api_version, name, and namespace to identify a specific object. If resource definition is provided, the kind value from the resource_definition will override this option. |
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Path to an existing Kubernetes config file. If not provided, and no other connection options are provided, the Kubernetes client will attempt to load the default configuration file from ~/.kube/config. Can also be specified via K8S_AUTH_KUBECONFIG environment variable. Multiple Kubernetes config file can be provided using separator ‘;’ for Windows platform or ‘:’ for others platforms. The kubernetes configuration can be provided as dictionary. This feature requires a python kubernetes client version >= 17.17.0. Added in version 2.2.0. |
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Selector (label query) to filter on. |
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Whether to override the default patch merge approach with a specific type. By default, the strategic merge will typically be used. For example, Custom Resource Definitions typically aren’t updatable by the usual strategic merge. You may want to use If more than one mutually exclusive with merge_type=json is deprecated and will be removed in version 4.0.0. Please use kubernetes.core.k8s_json_patch instead. Choices:
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Use to specify an object name. Use to create, delete, or discover an object without providing a full resource definition. Use in conjunction with api_version, kind and namespace to identify a specific object. If resource definition is provided, the metadata.name value from the resource_definition will override this option. |
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Use to specify an object namespace. Useful when creating, deleting, or discovering an object without providing a full resource definition. Use in conjunction with api_version, kind, and name to identify a specific object. If resource definition is provided, the metadata.namespace value from the resource_definition will override this option. |
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The comma separated list of hosts/domains/IP/CIDR that shouldn’t go through proxy. Can also be specified via K8S_AUTH_NO_PROXY environment variable. Please note that this module does not pick up typical proxy settings from the environment (e.g. NO_PROXY). This feature requires kubernetes>=19.15.0. When kubernetes library is less than 19.15.0, it fails even no_proxy set in correct. example value is “localhost,.local,.example.com,127.0.0.1,127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16” |
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Provide a password for authenticating with the API. Can also be specified via K8S_AUTH_PASSWORD environment variable. Please read the description of the |
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Whether or not to save the kube config refresh tokens. Can also be specified via K8S_AUTH_PERSIST_CONFIG environment variable. When the k8s context is using a user credentials with refresh tokens (like oidc or gke/gcloud auth), the token is refreshed by the k8s python client library but not saved by default. So the old refresh token can expire and the next auth might fail. Setting this flag to true will tell the k8s python client to save the new refresh token to the kube config file. Default to false. Please note that the current version of the k8s python client library does not support setting this flag to True yet. The fix for this k8s python library is here: https://github.com/kubernetes-client/python-base/pull/169 Choices:
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The URL of an HTTP proxy to use for the connection. Can also be specified via K8S_AUTH_PROXY environment variable. Please note that this module does not pick up typical proxy settings from the environment (e.g. HTTP_PROXY). |
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The Header used for the HTTP proxy. Documentation can be found here https://urllib3.readthedocs.io/en/latest/reference/urllib3.util.html?highlight=proxy_headers#urllib3.util.make_headers. |
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Colon-separated username:password for basic authentication header. Can also be specified via K8S_AUTH_PROXY_HEADERS_BASIC_AUTH environment. |
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Colon-separated username:password for proxy basic authentication header. Can also be specified via K8S_AUTH_PROXY_HEADERS_PROXY_BASIC_AUTH environment. |
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String representing the user-agent you want, such as foo/1.0. Can also be specified via K8S_AUTH_PROXY_HEADERS_USER_AGENT environment. |
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Provide a valid YAML definition (either as a string, list, or dict) for an object when creating or updating. NOTE: kind, api_version, name, and namespace will be overwritten by corresponding values found in the provided resource_definition. |
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When this option is set, apply runs in the server instead of the client. Ignored if This option requires “kubernetes >= 19.15.0”. |
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Name of the manager used to track field ownership. |
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A conflict is a special status error that occurs when an Server Side Apply operation tries to change a field, which another user also claims to manage. When set to True, server-side apply will force the changes against conflicts. Choices:
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Provide a path to a file containing a valid YAML definition of an object or objects to be created or updated. Mutually exclusive with resource_definition. NOTE: kind, api_version, name, and namespace will be overwritten by corresponding values found in the configuration read in from the src file. Reads from the local file system. To read from the Ansible controller’s file system, including vaulted files, use the file lookup plugin or template lookup plugin, combined with the from_yaml filter, and pass the result to resource_definition. See Examples below. The URL to manifest files that can be used to create the resource. Added in version 2.4.0. Mutually exclusive with template in case of kubernetes.core.k8s module. |
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Determines if an object should be created, patched, or deleted. When set to
Choices:
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Provide a valid YAML template definition file for an object when creating or updating. Value can be provided as string or dictionary. The parameter accepts multiple template files. Added in version 2.0.0. Mutually exclusive with Template files needs to be present on the Ansible Controller’s file system. Additional parameters can be specified using dictionary. Valid additional parameters -
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Provide a username for authenticating with the API. Can also be specified via K8S_AUTH_USERNAME environment variable. Please note that this only works with clusters configured to use HTTP Basic Auth. If your cluster has a different form of authentication (e.g. OAuth2 in OpenShift), this option will not work as expected and you should look into the community.okd.k8s_auth module, as that might do what you need. |
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how (if at all) to validate the resource definition against the kubernetes schema. Requires the kubernetes-validate python module. |
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whether to fail on validation errors. Choices:
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whether to fail when passing unexpected properties Choices:
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version of Kubernetes to validate against. defaults to Kubernetes server version |
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Whether or not to verify the API server’s SSL certificates. Can also be specified via K8S_AUTH_VERIFY_SSL environment variable. Choices:
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Whether to wait for certain resource kinds to end up in the desired state. By default the module exits once Kubernetes has received the request. Implemented for For resource kinds without an implementation, Choices:
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Specifies a custom condition on the status to wait for. Ignored if |
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The value of the reason field in your desired condition For example, if a The possible reasons in a condition are specific to each resource type in Kubernetes. See the API documentation of the status field for a given resource to see possible choices. |
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The value of the status field in your desired condition. For example, if a Choices:
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The type of condition to wait for. For example, the Required if you are specifying a If left empty, the The possible types for a condition are specific to each resource type in Kubernetes. See the API documentation of the status field for a given resource to see possible choices. |
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Number of seconds to sleep between checks. Default: |
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How long in seconds to wait for the resource to end up in the desired state. Ignored if Default: |
Notes
Note
To avoid SSL certificate validation errors when
validate_certsis True, the full certificate chain for the API server must be provided viaca_certor in the kubeconfig file.
Examples
- name: Create a k8s namespace
kubernetes.core.k8s:
name: testing
api_version: v1
kind: Namespace
state: present
- name: Create a Service object from an inline definition
kubernetes.core.k8s:
state: present
definition:
apiVersion: v1
kind: Service
metadata:
name: web
namespace: testing
labels:
app: galaxy
service: web
spec:
selector:
app: galaxy
service: web
ports:
- protocol: TCP
targetPort: 8000
name: port-8000-tcp
port: 8000
- name: Remove an existing Service object
kubernetes.core.k8s:
state: absent
api_version: v1
kind: Service
namespace: testing
name: web
# Passing the object definition from a file
- name: Create a Deployment by reading the definition from a local file
kubernetes.core.k8s:
state: present
src: /testing/deployment.yml
- name: >-
Read definition file from the Ansible controller file system.
If the definition file has been encrypted with Ansible Vault it will automatically be decrypted.
kubernetes.core.k8s:
state: present
definition: "{{ lookup('file', '/testing/deployment.yml') | from_yaml }}"
- name: >-
(Alternative) Read definition file from the Ansible controller file system.
In this case, the definition file contains multiple YAML documents, separated by ---.
If the definition file has been encrypted with Ansible Vault it will automatically be decrypted.
kubernetes.core.k8s:
state: present
definition: "{{ lookup('file', '/testing/deployment.yml') | from_yaml_all }}"
- name: Read definition template file from the Ansible controller file system
kubernetes.core.k8s:
state: present
template: '/testing/deployment.j2'
- name: Read definition template file from the Ansible controller file system that uses custom start/end strings
kubernetes.core.k8s:
state: present
template:
path: '/testing/deployment.j2'
variable_start_string: '[['
variable_end_string: ']]'
- name: Read multiple definition template file from the Ansible controller file system
kubernetes.core.k8s:
state: present
template:
- path: '/testing/deployment_one.j2'
- path: '/testing/deployment_two.j2'
variable_start_string: '[['
variable_end_string: ']]'
- name: fail on validation errors
kubernetes.core.k8s:
state: present
definition: "{{ lookup('template', '/testing/deployment.yml') | from_yaml }}"
validate:
fail_on_error: yes
- name: warn on validation errors, check for unexpected properties
kubernetes.core.k8s:
state: present
definition: "{{ lookup('template', '/testing/deployment.yml') | from_yaml }}"
validate:
fail_on_error: no
strict: yes
# Download and apply manifest
- name: Download metrics-server manifest to the cluster.
ansible.builtin.get_url:
url: https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
dest: ~/metrics-server.yaml
mode: '0664'
- name: Apply metrics-server manifest to the cluster.
kubernetes.core.k8s:
state: present
src: ~/metrics-server.yaml
# Wait for a Deployment to pause before continuing
- name: Pause a Deployment.
kubernetes.core.k8s:
definition:
apiVersion: apps/v1
kind: Deployment
metadata:
name: example
namespace: testing
spec:
paused: True
wait: yes
wait_condition:
type: Progressing
status: Unknown
reason: DeploymentPaused
# Patch existing namespace : add label
- name: add label to existing namespace
kubernetes.core.k8s:
state: patched
kind: Namespace
name: patch_namespace
definition:
metadata:
labels:
support: patch
# Create object using generateName
- name: create resource using name generated by the server
kubernetes.core.k8s:
state: present
generate_name: pod-
definition:
apiVersion: v1
kind: Pod
spec:
containers:
- name: py
image: python:3.7-alpine
imagePullPolicy: IfNotPresent
# Server side apply
- name: Create configmap using server side apply
kubernetes.core.k8s:
namespace: testing
definition:
apiVersion: v1
kind: ConfigMap
metadata:
name: my-configmap
apply: yes
server_side_apply:
field_manager: ansible
# Delete all Deployment from specified namespace
- name: Delete all Deployment from specified namespace
kubernetes.core.k8s:
api_version: apps/v1
namespace: testing
kind: Deployment
delete_all: true
Return Values
Common return values are documented here, the following are the fields unique to this module:
Key |
Description |
|---|---|
The created, patched, or otherwise present object. Will be empty in the case of a deletion. Returned: success |
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The versioned schema of this representation of an object. Returned: success |
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elapsed time of task in seconds Returned: when Sample: |
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error while trying to create/delete the object. Returned: error |
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Returned only when multiple yaml documents are passed to src or resource_definition Returned: when resource_definition or src contains list of objects |
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Represents the REST resource this object represents. Returned: success |
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Standard object metadata. Includes name, namespace, annotations, labels, etc. Returned: success |
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Specific attributes of the object. Will vary based on the api_version and kind. Returned: success |
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Current status details for the object. Returned: success |