Resource templating¶

Experimental status

This is an experimental feature, and implementation could change slightly in the next versions.

Info

Templating was disabled by default in v0.1.* but is now enabled by default since v0.2.1.

Chainsaw can apply transformations to the resources before they are processed by the operation.

This is useful when a resource needs some runtime configuration.

Templating must be enabled at the configuration, test, step, or operation level for the templating process to kick in. Alternatively, templating can be enabled using the --template flag when invoking chainsaw from the command line.

Note

Unlike assertion trees, templating can only be specified in leave nodes of the YAML tree.

Example¶

The test below will create, assert, and delete a ConfigMap with a dynamic name configured at runtime using the $namespace binding.

apiVersion: chainsaw.kyverno.io/v1alpha1
kind: Test
metadata:
  name: values
spec:
  steps:
  - try:
    - apply:
        resource:
          apiVersion: v1
          kind: ConfigMap
          metadata:
            name: ($namespace)
    - assert:
        resource:
          apiVersion: v1
          kind: ConfigMap
          metadata:
            name: ($namespace)
    - delete:
        ref:
          apiVersion: v1
          kind: ConfigMap
          name: ($namespace)