CEL cheatsheet
About
The Kustomization API supports defining custom logic for performing health
checks on custom resources through the field
.spec.healthCheckExprs.
This field accepts a set of Common Expression Language (CEL) expressions.
Here you can find a set of community-maintained CEL expressions for popular custom resources.
Contributing
For contributing to this library, open a pull request making changes to this file:
https://github.com/fluxcd/website/blob/main/content/en/flux/cheatsheets/cel-healthchecks.md
Please make sure to test your expressions and post evidence of their correctness in the pull request, i.e. configure a Kustomization with the expressions, verify that they work as expected and post logs or screenshots in the pull request.
The CEL Playground is a useful resource for testing your expressions. The input passed to each expression is the custom resource object itself.
Library
The items in this library are sorted in alphabetical order.
Cluster
- apiVersion: cluster.x-k8s.io/v1beta1
kind: Cluster
failed: status.conditions.filter(e, e.type == 'Ready').all(e, e.status == 'False')
current: status.conditions.filter(e, e.type == 'Ready').all(e, e.status == 'True')
ClusterIssuer
- apiVersion: cert-manager.io/v1
kind: ClusterIssuer
failed: status.conditions.filter(e, e.type == 'Ready').all(e, e.status == 'False')
current: status.conditions.filter(e, e.type == 'Ready').all(e, e.status == 'True')
ScaledObject
- apiVersion: keda.sh/v1alpha1
kind: ScaledObject
failed: status.conditions.filter(e, e.type == 'Ready').all(e, e.status == 'False')
current: status.conditions.filter(e, e.type == 'Ready').all(e, e.status == 'True')
SealedSecret
- apiVersion: bitnami.com/v1alpha1
kind: SealedSecret
failed: status.conditions.filter(e, e.type == 'Synced').all(e, e.status == 'False')
current: status.conditions.filter(e, e.type == 'Synced').all(e, e.status == 'True')