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hjacobs / kube-janitor

Clean up (delete) Kubernetes resources after a configured TTL (time to live)
GNU General Public License v3.0
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Remove unmounted/unused PVCs #62

Closed hjacobs closed 4 years ago

hjacobs commented 4 years ago

Kubernetes Janitor should allow deleting PersistentVolumeClaims which are no longer mounted or referenced, e.g. because the StatefulSet was deleted.

PVCs are not automatically deleted and it's easy to forget them. From https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/:

Deleting and/or scaling a StatefulSet down will not delete the volumes associated with the StatefulSet. This is done to ensure data safety, which is generally more valuable than an automatic purge of all related StatefulSet resources.

Idea: add additional context properties which can be used in the rule jmespath.

hjacobs commented 4 years ago

To delete all unused PVCs, use a rules file (--rules-file option) with the following contents:

rules:
- id: remove-unused-pvcs
  resources:
  - persistentvolumeclaims
  jmespath: "_context.pvc_is_not_mounted && _context.pvc_is_not_referenced"
  ttl: 24h
hjacobs commented 4 years ago

Follow-up: #65, #66