kyverno/samples/RequirePodProbes.md

Require livenessProbe and readinessProbe

Liveness and readiness probes need to be configured to correctly manage a pod's lifecycle during deployments, restarts, and upgrades.

For each pod, a periodic livenessProbe is performed by the kubelet to determine if the pod's containers are running or need to be restarted. A readinessProbe is used by services and deployments to determine if the pod is ready to receive network traffic.

In this sample policy, a validation rule checks to ensure that all Pods have both a liveness and a readiness probe defined by looking at the periodSeconds field. By using the annotation pod-policies.kyverno.io/autogen-controllers, it modifies the default behavior and ensures that only Pods originating from DaemonSet, Deployment, and StatefulSet objects are validated.

More Information

• Kyverno Auto-Gen Rules for Pod Controllers
• Configure Liveness, Readiness and Startup Probes

Policy YAML

require_probes.yaml

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: require-pod-probes
  annotations:
    pod-policies.kyverno.io/autogen-controllers: DaemonSet,Deployment,StatefulSet
spec:
  validationFailureAction: audit
  rules:
  - name: validate-livenessProbe-readinessProbe
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: "Liveness and readiness probes are required"
      pattern:
        spec:
          containers:
          - livenessProbe:
              periodSeconds: ">0"
            readinessProbe:
              periodSeconds: ">0"