k8s – Manage Kubernetes (K8s) objects — Ansible Documentation

- AnsibleFest
- Products
- Community
- Webinars & Training
- Blog

Documentation

# k8s – Manage Kubernetes (K8s) objects

New in version 2.6.

- Synopsis
- Requirements
- Parameters
- Notes
- Examples
- Return Values
- Status

## Synopsis

- Use the OpenShift 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 k8s_info module to obtain a list of items about an object of type `kind`
- Authenticate using either a config file, certificates, password or token.
- Supports check mode.

Aliases: openshift_raw,k8s_raw

## Requirements

The below requirements are needed on the host that executes this module.

- python >= 2.7
- openshift >= 0.6
- PyYAML >= 3.11

## Parameters

Parameter | Choices/Defaults | Comments
--- | --- | ---
api_key string |  | Token used to authenticate with the API. Can also be specified via K8S_AUTH_API_KEY environment variable.
api_version string | Default: "v1" | 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 from the resource_definition will override this option. aliases: api, version
append_hash boolean added in 2.8 | Choices: no yes | 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)
apply boolean added in 2.9 | Choices: no yes | `apply` compares the desired resource definition with the previously supplied resource definition, ignoring properties that are automatically generated `apply` works better with Services than 'force=yes' mutually exclusive with `merge_type`
ca_cert path |  | 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. aliases: ssl_ca_cert
client_cert path |  | Path to a certificate used to authenticate with the API. Can also be specified via K8S_AUTH_CERT_FILE environment variable. aliases: cert_file
client_key path |  | Path to a key file used to authenticate with the API. Can also be specified via K8S_AUTH_KEY_FILE environment variable. aliases: key_file
context string |  | The name of a context found in the config file. Can also be specified via K8S_AUTH_CONTEXT environment variable.
force boolean | Choices: no ← yes | If set to `yes`, and state is `present`, an existing object will be replaced.
host string |  | Provide a URL for accessing the API. Can also be specified via K8S_AUTH_HOST environment variable.
kind string |  | 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 from the resource_definition will override this option.
kubeconfig path |  | Path to an existing Kubernetes config file. If not provided, and no other connection options are provided, the openshift client will attempt to load the default configuration file from ~/.kube/config.json. Can also be specified via K8S_AUTH_KUBECONFIG environment variable.
merge_type list added in 2.7 | Choices: json merge strategic-merge | 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 `merge` if you see "strategic merge patch format is not supported" See https://kubernetes.io/docs/tasks/run-application/update-api-object-kubectl-patch/#use-a-json-merge-patch-to-update-a-deployment Requires openshift >= 0.6.2 If more than one merge_type is given, the merge_types will be tried in order If openshift >= 0.6.2, this defaults to `['strategic-merge', 'merge']`, which is ideal for using the same parameters on resource kinds that combine Custom Resources and built-in resources. For openshift < 0.6.2, the default is simply `strategic-merge`. mutually exclusive with `apply`
name string |  | 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.
namespace string |  | 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 specfic object. If resource definition is provided, the metadata.namespace value from the resource_definition will override this option.
password string |  | Provide a password for authenticating with the API. Can also be specified via K8S_AUTH_PASSWORD environment variable. Please read the description of the `username` option for a discussion of when this option is applicable.
proxy - added in 2.9 |  | 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).
resource_definition - |  | 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. aliases: definition, inline
src path |  | 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.
state string | Choices: absent present ← | Determines if an object should be created, patched, or deleted. When set to `present`, an object will be created, if it does not already exist. If set to `absent`, an existing object will be deleted. If set to `present`, an existing object will be patched, if its attributes differ from those specified using resource_definition or src.
username string |  | 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 `k8s_auth` module, as that might do what you need.
validate - added in 2.8 |  | how (if at all) to validate the resource definition against the kubernetes schema. Requires the kubernetes-validate python module
| fail_on_error boolean / required | Choices: no yes | whether to fail on validation errors.
| strict boolean | Choices: no ← yes | whether to fail when passing unexpected properties
| version - |  | version of Kubernetes to validate against. defaults to Kubernetes server version
validate_certs boolean | Choices: no yes | Whether or not to verify the API server's SSL certificates. Can also be specified via K8S_AUTH_VERIFY_SSL environment variable. aliases: verify_ssl
wait boolean added in 2.8 | Choices: no ← yes | 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 `state=present` for `Deployment`, `DaemonSet` and `Pod`, and for `state=absent` for all resource kinds. For resource kinds without an implementation, `wait` returns immediately unless `wait_condition` is set.
wait_condition - added in 2.8 |  | Specifies a custom condition on the status to wait for. Ignored if `wait` is not set or is set to False.
| reason - |  | The value of the reason field in your desired condition For example, if a `Deployment` is paused, The `Progressing` c(type) will have the `DeploymentPaused` reason. 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.
| status - | Choices: yes no Unknown | The value of the status field in your desired condition. For example, if a `Deployment` is paused, the `Progressing` `type` will have the `Unknown` status.
| type - |  | The type of condition to wait for. For example, the `Pod` resource will set the `Ready` condition (among others) Required if you are specifying a `wait_condition`. If left empty, the `wait_condition` field will be ignored. 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.
wait_sleep - added in 2.9 | Default: 5 | Number of seconds to sleep between checks.
wait_timeout - added in 2.8 | Default: 120 | How long in seconds to wait for the resource to end up in the desired state. Ignored if `wait` is not set.

## Notes

Note

- If your OpenShift Python library is not 0.9.0 or newer and you are trying to remove an item from an associative array/dictionary, for example a label or an annotation, you will need to explicitly set the value of the item to be removed to null. Simply deleting the entry in the dictionary will not remove it from openshift or kubernetes.
- The OpenShift Python client wraps the K8s Python client, providing full access to all of the APIS and models available on both platforms. For API version details and additional information visit https://github.com/openshift/openshift-restclient-python
- To avoid SSL certificate validation errors when `validate_certs` is True, the full certificate chain for the API server must be provided via `ca_cert` or in the kubeconfig file.

## Examples

    - name: Create a k8s namespace
      k8s:
        name: testing
        api_version: v1
        kind: Namespace
        state: present

    - name: Create a Service object from an inline definition
      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: Create a Service object by reading the definition from a file
      k8s:
        state: present
        src: /testing/service.yml

    - name: Remove an existing Service object
      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
      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.
      k8s:
        state: present
        definition: "{{ lookup('file', '/testing/deployment.yml') }}"

    - name: Read definition file from the Ansible controller file system after Jinja templating
      k8s:
        state: present
        definition: "{{ lookup('template', '/testing/deployment.yml') }}"

    - name: fail on validation errors
      k8s:
        state: present
        definition: "{{ lookup('template', '/testing/deployment.yml') }}"
        validate:
          fail_on_error: yes

    - name: warn on validation errors, check for unexpected properties
      k8s:
        state: present
        definition: "{{ lookup('template', '/testing/deployment.yml') }}"
        validate:
          fail_on_error: no
          strict: yes

## Return Values

Common return values are documented here, the following are the fields unique to this module:

Key | Returned | Description
--- | --- | ---
result complex | success | The created, patched, or otherwise present object. Will be empty in the case of a deletion.
| api_version string | success | The versioned schema of this representation of an object.
| duration integer | when `wait` is true | elapsed time of task in seconds Sample: 48
| items list | when resource_definition or src contains list of objects | Returned only when multiple yaml documents are passed to src or resource_definition
| kind string | success | Represents the REST resource this object represents.
| metadata complex | success | Standard object metadata. Includes name, namespace, annotations, labels, etc.
| spec complex | success | Specific attributes of the object. Will vary based on the api_version and kind.
| status complex | success | Current status details for the object.

## Status

- This module is not guaranteed to have a backwards compatible interface. [preview]
- This module is maintained by the Ansible Community. [community]

### Authors

- Chris Houseknecht (@chouseknecht)
- Fabian von Feilitzsch (@fabianvf)

Hint

If you notice any issues in this documentation, you can edit this document to improve it.