kubernetes.core.k8s_service module – Manage Services on Kubernetes

Note

This module is part of the kubernetes.core collection (version 2.4.0).

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_service.

Synopsis

  • Use Kubernetes Python SDK to manage Services on Kubernetes

Note

This module has a corresponding action plugin.

Requirements

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

  • python >= 3.6

  • kubernetes >= 12.0.0

Parameters

Parameter

Comments

api_key

string

Token used to authenticate with the API. Can also be specified via K8S_AUTH_API_KEY environment variable.

apply

boolean

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

Choices:

  • false ← (default)

  • true

ca_cert

aliases: ssl_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.

client_cert

aliases: cert_file

path

Path to a certificate used to authenticate with the API. Can also be specified via K8S_AUTH_CERT_FILE environment variable.

client_key

aliases: key_file

path

Path to a key file used to authenticate with the API. Can also be specified via K8S_AUTH_KEY_FILE environment variable.

context

string

The name of a context found in the config file. Can also be specified via K8S_AUTH_CONTEXT environment variable.

force

boolean

If set to yes, and state is present, an existing object will be replaced.

Choices:

  • false ← (default)

  • true

host

string

Provide a URL for accessing the API. Can also be specified via K8S_AUTH_HOST environment variable.

impersonate_groups

list / elements=string

added in kubernetes.core 2.3.0

Group(s) to impersonate for the operation.

Can also be specified via K8S_AUTH_IMPERSONATE_GROUPS environment. Example: Group1,Group2

impersonate_user

string

added in kubernetes.core 2.3.0

Username to impersonate for the operation.

Can also be specified via K8S_AUTH_IMPERSONATE_USER environment.

kubeconfig

any

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.

merge_type

list / elements=string

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

If more than one merge_type is given, the merge_types will be tried in order

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.

Choices:

  • "json"

  • "merge"

  • "strategic-merge"

name

string / required

Use to specify a Service object name.

namespace

string / required

Use to specify a Service object namespace.

no_proxy

string

added in kubernetes.core 2.3.0

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”

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.

persist_config

boolean

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:

  • false

  • true

ports

list / elements=dictionary

A list of ports to expose.

https://kubernetes.io/docs/concepts/services-networking/service/#multi-port-services

proxy

string

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).

proxy_headers

dictionary

added in kubernetes.core 2.0.0

The Header used for the HTTP proxy.

Documentation can be found here https://urllib3.readthedocs.io/en/latest/reference/urllib3.util.html?highlight%3Dproxy_headers#urllib3.util.make_headers.

basic_auth

string

Colon-separated username:password for basic authentication header.

Can also be specified via K8S_AUTH_PROXY_HEADERS_BASIC_AUTH environment.

proxy_basic_auth

string

Colon-separated username:password for proxy basic authentication header.

Can also be specified via K8S_AUTH_PROXY_HEADERS_PROXY_BASIC_AUTH environment.

user_agent

string

String representing the user-agent you want, such as foo/1.0.

Can also be specified via K8S_AUTH_PROXY_HEADERS_USER_AGENT environment.

resource_definition

aliases: definition, inline

string

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.

selector

dictionary

Label selectors identify objects this Service should apply to.

https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/

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.

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.

state

string

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.

Choices:

  • "absent"

  • "present" ← (default)

type

string

Specifies the type of Service to create.

See https://kubernetes.io/docs/concepts/services-networking/service/#publishing-services-service-types

Choices:

  • "NodePort"

  • "ClusterIP"

  • "LoadBalancer"

  • "ExternalName"

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 community.okd.k8s_auth module, as that might do what you need.

validate_certs

aliases: verify_ssl

boolean

Whether or not to verify the API server’s SSL certificates. Can also be specified via K8S_AUTH_VERIFY_SSL environment variable.

Choices:

  • false

  • true

Notes

Note

  • 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: Expose https port with ClusterIP
  kubernetes.core.k8s_service:
    state: present
    name: test-https
    namespace: default
    ports:
    - port: 443
      protocol: TCP
    selector:
      key: special

- name: Expose https port with ClusterIP using spec
  kubernetes.core.k8s_service:
    state: present
    name: test-https
    namespace: default
    inline:
      spec:
        ports:
        - port: 443
          protocol: TCP
        selector:
          key: special

Return Values

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

Key

Description

result

complex

The created, patched, or otherwise present Service object. Will be empty in the case of a deletion.

Returned: success

api_version

string

The versioned schema of this representation of an object.

Returned: success

kind

string

Always ‘Service’.

Returned: success

metadata

complex

Standard object metadata. Includes name, namespace, annotations, labels, etc.

Returned: success

spec

complex

Specific attributes of the object. Will vary based on the api_version and kind.

Returned: success

status

complex

Current status details for the object.

Returned: success

Authors

  • KubeVirt Team (@kubevirt)