Add Pod Disruption Budget

A PodDisruptionBudget limits the number of Pods of a replicated application that are down simultaneously from voluntary disruptions. For example, a quorum-based application would like to ensure that the number of replicas running is never brought below the number needed for a quorum. As an application owner, you can create a PodDisruptionBudget (PDB) for each application. This policy will create a PDB resource whenever a new Deployment is created.

Policy Definition

/other/create-default-pdb/create-default-pdb.yaml

 1apiVersion: kyverno.io/v1
 2kind: ClusterPolicy
 3metadata:
 4  name: create-default-pdb
 5  annotations:
 6    policies.kyverno.io/title: Add Pod Disruption Budget
 7    policies.kyverno.io/category: Sample
 8    kyverno.io/kyverno-version: 1.6.2
 9    policies.kyverno.io/minversion: 1.6.0
10    policies.kyverno.io/subject: Deployment
11    policies.kyverno.io/description: >-
12      A PodDisruptionBudget limits the number of Pods of a replicated application that
13      are down simultaneously from voluntary disruptions. For example, a quorum-based
14      application would like to ensure that the number of replicas running is never brought
15      below the number needed for a quorum. As an application owner, you can create a PodDisruptionBudget (PDB)
16      for each application. This policy will create a PDB resource whenever a new Deployment is created.
17spec:
18  rules:
19  - name: create-default-pdb
20    match:
21      any:
22      - resources:
23          kinds:
24          - Deployment
25    generate:
26      apiVersion: policy/v1
27      kind: PodDisruptionBudget
28      name: "{{request.object.metadata.name}}-default-pdb"
29      namespace: "{{request.object.metadata.namespace}}"
30      data:
31        spec:
32          minAvailable: 1
33          selector: "{{request.object.spec.selector}}"

Create policy issue