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kubernetes.core/docs/kubernetes.core.k8s_exec_module.rst
GomathiselviS fe9c12326d Update main branch post 3.0.0 release (#663)
Update main branch post 3.0.0 release

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Reviewed-by: Bikouo Aubin
2023-11-21 17:23:25 +00:00

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.. _kubernetes.core.k8s_exec_module:
************************
kubernetes.core.k8s_exec
************************
**Execute command in Pod**
Version added: 0.10.0
.. contents::
:local:
:depth: 1
Synopsis
--------
- Use the Kubernetes Python client to execute command on K8s pods.
Requirements
------------
The below requirements are needed on the host that executes this module.
- python >= 3.9
- kubernetes >= 24.2.0
- PyYAML >= 3.11
Parameters
----------
.. raw:: html
<table border=0 cellpadding=0 class="documentation-table">
<tr>
<th colspan="2">Parameter</th>
<th>Choices/<font color="blue">Defaults</font></th>
<th width="100%">Comments</th>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>api_key</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>Token used to authenticate with the API. Can also be specified via K8S_AUTH_API_KEY environment variable.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>ca_cert</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">path</span>
</div>
</td>
<td>
</td>
<td>
<div>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.</div>
<div style="font-size: small; color: darkgreen"><br/>aliases: ssl_ca_cert</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>client_cert</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">path</span>
</div>
</td>
<td>
</td>
<td>
<div>Path to a certificate used to authenticate with the API. Can also be specified via K8S_AUTH_CERT_FILE environment variable.</div>
<div style="font-size: small; color: darkgreen"><br/>aliases: cert_file</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>client_key</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">path</span>
</div>
</td>
<td>
</td>
<td>
<div>Path to a key file used to authenticate with the API. Can also be specified via K8S_AUTH_KEY_FILE environment variable.</div>
<div style="font-size: small; color: darkgreen"><br/>aliases: key_file</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>command</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
/ <span style="color: red">required</span>
</div>
</td>
<td>
</td>
<td>
<div>The command to execute.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>container</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>The name of the container in the pod to connect to.</div>
<div>Defaults to only container if there is only one container in the pod.</div>
<div>If not specified, will choose the first container from the given pod as kubectl cmdline does.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>context</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>The name of a context found in the config file. Can also be specified via K8S_AUTH_CONTEXT environment variable.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>host</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>Provide a URL for accessing the API. Can also be specified via K8S_AUTH_HOST environment variable.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>impersonate_groups</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">list</span>
/ <span style="color: purple">elements=string</span>
</div>
<div style="font-style: italic; font-size: small; color: darkgreen">added in 2.3.0</div>
</td>
<td>
</td>
<td>
<div>Group(s) to impersonate for the operation.</div>
<div>Can also be specified via K8S_AUTH_IMPERSONATE_GROUPS environment. Example: Group1,Group2</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>impersonate_user</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
<div style="font-style: italic; font-size: small; color: darkgreen">added in 2.3.0</div>
</td>
<td>
</td>
<td>
<div>Username to impersonate for the operation.</div>
<div>Can also be specified via K8S_AUTH_IMPERSONATE_USER environment.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>kubeconfig</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">raw</span>
</div>
</td>
<td>
</td>
<td>
<div>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 <em>~/.kube/config</em>. Can also be specified via K8S_AUTH_KUBECONFIG environment variable.</div>
<div>Multiple Kubernetes config file can be provided using separator &#x27;;&#x27; for Windows platform or &#x27;:&#x27; for others platforms.</div>
<div>The kubernetes configuration can be provided as dictionary. This feature requires a python kubernetes client version &gt;= 17.17.0. Added in version 2.2.0.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>namespace</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
/ <span style="color: red">required</span>
</div>
</td>
<td>
</td>
<td>
<div>The pod namespace name.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>no_proxy</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
<div style="font-style: italic; font-size: small; color: darkgreen">added in 2.3.0</div>
</td>
<td>
</td>
<td>
<div>The comma separated list of hosts/domains/IP/CIDR that shouldn&#x27;t go through proxy. Can also be specified via K8S_AUTH_NO_PROXY environment variable.</div>
<div>Please note that this module does not pick up typical proxy settings from the environment (e.g. NO_PROXY).</div>
<div>This feature requires kubernetes&gt;=19.15.0. When kubernetes library is less than 19.15.0, it fails even no_proxy set in correct.</div>
<div>example value is &quot;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&quot;</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>password</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>Provide a password for authenticating with the API. Can also be specified via K8S_AUTH_PASSWORD environment variable.</div>
<div>Please read the description of the <code>username</code> option for a discussion of when this option is applicable.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>persist_config</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">boolean</span>
</div>
</td>
<td>
<ul style="margin: 0; padding: 0"><b>Choices:</b>
<li>no</li>
<li>yes</li>
</ul>
</td>
<td>
<div>Whether or not to save the kube config refresh tokens. Can also be specified via K8S_AUTH_PERSIST_CONFIG environment variable.</div>
<div>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.</div>
<div>Default to false.</div>
<div>Please note that the current version of the k8s python client library does not support setting this flag to True yet.</div>
<div>The fix for this k8s python library is here: https://github.com/kubernetes-client/python-base/pull/169</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>pod</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
/ <span style="color: red">required</span>
</div>
</td>
<td>
</td>
<td>
<div>The pod name.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>proxy</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>The URL of an HTTP proxy to use for the connection.</div>
<div>Can also be specified via <em>K8S_AUTH_PROXY</em> environment variable.</div>
<div>Please note that this module does not pick up typical proxy settings from the environment (for example, HTTP_PROXY).</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>proxy_headers</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">dictionary</span>
</div>
<div style="font-style: italic; font-size: small; color: darkgreen">added in 2.0.0</div>
</td>
<td>
</td>
<td>
<div>The Header used for the HTTP proxy.</div>
<div>Documentation can be found here <a href='https://urllib3.readthedocs.io/en/latest/reference/urllib3.util.html?highlight=proxy_headers#urllib3.util.make_headers'>https://urllib3.readthedocs.io/en/latest/reference/urllib3.util.html?highlight=proxy_headers#urllib3.util.make_headers</a>.</div>
</td>
</tr>
<tr>
<td class="elbow-placeholder"></td>
<td colspan="1">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>basic_auth</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>Colon-separated username:password for basic authentication header.</div>
<div>Can also be specified via K8S_AUTH_PROXY_HEADERS_BASIC_AUTH environment.</div>
</td>
</tr>
<tr>
<td class="elbow-placeholder"></td>
<td colspan="1">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>proxy_basic_auth</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>Colon-separated username:password for proxy basic authentication header.</div>
<div>Can also be specified via K8S_AUTH_PROXY_HEADERS_PROXY_BASIC_AUTH environment.</div>
</td>
</tr>
<tr>
<td class="elbow-placeholder"></td>
<td colspan="1">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>user_agent</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>String representing the user-agent you want, such as foo/1.0.</div>
<div>Can also be specified via K8S_AUTH_PROXY_HEADERS_USER_AGENT environment.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>username</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td>
</td>
<td>
<div>Provide a username for authenticating with the API. Can also be specified via K8S_AUTH_USERNAME environment variable.</div>
<div>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 <span class='module'>community.okd.k8s_auth</span> module, as that might do what you need.</div>
</td>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="parameter-"></div>
<b>validate_certs</b>
<a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
<div style="font-size: small">
<span style="color: purple">boolean</span>
</div>
</td>
<td>
<ul style="margin: 0; padding: 0"><b>Choices:</b>
<li>no</li>
<li>yes</li>
</ul>
</td>
<td>
<div>Whether or not to verify the API server&#x27;s SSL certificates. Can also be specified via K8S_AUTH_VERIFY_SSL environment variable.</div>
<div style="font-size: small; color: darkgreen"><br/>aliases: verify_ssl</div>
</td>
</tr>
</table>
<br/>
Notes
-----
.. note::
- Return code ``rc`` for the command executed is added in output in version 2.2.0, and deprecates return code ``return_code``.
- Return code ``return_code`` for the command executed is added in output in version 1.0.0.
- The authenticated user must have at least read access to the pods resource and write access to the pods/exec resource.
- 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
--------
.. code-block:: yaml
- name: Execute a command
kubernetes.core.k8s_exec:
namespace: myproject
pod: zuul-scheduler
command: zuul-scheduler full-reconfigure
- name: Check RC status of command executed
kubernetes.core.k8s_exec:
namespace: myproject
pod: busybox-test
command: cmd_with_non_zero_exit_code
register: command_status
ignore_errors: True
- name: Check last command status
debug:
msg: "cmd failed"
when: command_status.rc != 0
- name: Specify a container name to execute the command on
kubernetes.core.k8s_exec:
namespace: myproject
pod: busybox-test
container: manager
command: echo "hello"
Return Values
-------------
Common return values are documented `here <https://docs.ansible.com/ansible/latest/reference_appendices/common_return_values.html#common-return-values>`_, the following are the fields unique to this module:
.. raw:: html
<table border=0 cellpadding=0 class="documentation-table">
<tr>
<th colspan="2">Key</th>
<th>Returned</th>
<th width="100%">Description</th>
</tr>
<tr>
<td colspan="2">
<div class="ansibleOptionAnchor" id="return-"></div>
<b>result</b>
<a class="ansibleOptionLink" href="#return-" title="Permalink to this return value"></a>
<div style="font-size: small">
<span style="color: purple">complex</span>
</div>
</td>
<td>success</td>
<td>
<div>The command object</div>
<br/>
</td>
</tr>
<tr>
<td class="elbow-placeholder">&nbsp;</td>
<td colspan="1">
<div class="ansibleOptionAnchor" id="return-"></div>
<b>rc</b>
<a class="ansibleOptionLink" href="#return-" title="Permalink to this return value"></a>
<div style="font-size: small">
<span style="color: purple">integer</span>
</div>
<div style="font-style: italic; font-size: small; color: darkgreen">added in 2.2.0</div>
</td>
<td></td>
<td>
<div>The command status code</div>
<br/>
</td>
</tr>
<tr>
<td class="elbow-placeholder">&nbsp;</td>
<td colspan="1">
<div class="ansibleOptionAnchor" id="return-"></div>
<b>return_code</b>
<a class="ansibleOptionLink" href="#return-" title="Permalink to this return value"></a>
<div style="font-size: small">
<span style="color: purple">integer</span>
</div>
</td>
<td></td>
<td>
<div>The command status code. This attribute is deprecated and will be removed in a future release. Please use rc instead.</div>
<br/>
</td>
</tr>
<tr>
<td class="elbow-placeholder">&nbsp;</td>
<td colspan="1">
<div class="ansibleOptionAnchor" id="return-"></div>
<b>stderr</b>
<a class="ansibleOptionLink" href="#return-" title="Permalink to this return value"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td></td>
<td>
<div>The command stderr</div>
<br/>
</td>
</tr>
<tr>
<td class="elbow-placeholder">&nbsp;</td>
<td colspan="1">
<div class="ansibleOptionAnchor" id="return-"></div>
<b>stderr_lines</b>
<a class="ansibleOptionLink" href="#return-" title="Permalink to this return value"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td></td>
<td>
<div>The command stderr</div>
<br/>
</td>
</tr>
<tr>
<td class="elbow-placeholder">&nbsp;</td>
<td colspan="1">
<div class="ansibleOptionAnchor" id="return-"></div>
<b>stdout</b>
<a class="ansibleOptionLink" href="#return-" title="Permalink to this return value"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td></td>
<td>
<div>The command stdout</div>
<br/>
</td>
</tr>
<tr>
<td class="elbow-placeholder">&nbsp;</td>
<td colspan="1">
<div class="ansibleOptionAnchor" id="return-"></div>
<b>stdout_lines</b>
<a class="ansibleOptionLink" href="#return-" title="Permalink to this return value"></a>
<div style="font-size: small">
<span style="color: purple">string</span>
</div>
</td>
<td></td>
<td>
<div>The command stdout</div>
<br/>
</td>
</tr>
</table>
<br/><br/>
Status
------
Authors
~~~~~~~
- Tristan de Cacqueray (@tristanC)