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document --resource-view-prerender-hook

tags/19.11.0^2
Henning Jacobs 2 weeks ago
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      docs/customization.rst

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docs/customization.rst View File

@@ -15,6 +15,7 @@ for the needs of your organization:
* one of the :ref:`themes` can be selected as default, or you can create your own CSS theme
* :ref:`html-templates` can be customized to match your branding, to add static links, and to inject custom JS/CSS
* :ref:`static-assets` can be included to add images, JS, or CSS files
* :ref:`prerender-hooks` can be used to add or transform view data


.. _sidebar:
@@ -242,5 +243,30 @@ As you might want to add or change static assets (e.g. JS, CSS, images),
you can point Kubernetes Web View to a folder containing your custom assets.
Use the ``--static-assets-path`` command line option for this and either build a custom Docker image or mount your asset directory into the pod.

.. _prerender-hooks:

Prerender Hooks
===============

The view data (``context`` for Jinja2_ template) can be modified by custom prerender hooks to allow advanced customization.

For example, to add generated custom links for deployments to the resource detail view, create a coroutine function with signature like ``async def resource_view_prerender(cluster, namespace, resource, context)`` in a file ``hooks.py``:

.. code-block:: python

async def resource_view_prerender(cluster, namespace: str, resource, context: dict):
if resource.kind == "Deployment":
link = {
"href": f"https://cd.example.org/pipelines/{resource.labels['pipeline-id']}/{resource.labels['deployment-id']}",
"class": "is-link",
"title": "Pipeline link",
"icon": "external-link-alt",
}
context["links"].append(link)

This file would need to be in the Python search path, e.g. as ``hooks.py`` in the root ("/") of the Docker image. Pass the hook function as ``--resource-view-prerender-hook=hooks.resource_view_prerender`` to Kubernetes Web View.

Note that you can also do more advanced stuff in the prerender hook, e.g. call out to external systems to look up additional information.


.. _Jinja2: https://palletsprojects.com/p/jinja/

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