Context: Kubenete 1.0.3, Helm 2.8.2
Helm Hook: pre-install weight: 0 delete-policy: before-hook-creation
Helm command: helm upgrade --install -n namespace
Problem description: The hook block is well rendered when running with --dry-run mode. But after installing (without dry-run), no hook job is triggered.
Check the job using command kubectl get jobs -n namespace.
Hook is a mechanism introduced in HELM to intervence at certain points in release life cycle. Hooks can be definied in few ways via special annotations in metadata section, i.e. "pre-install", "post-install", "pre-upgrade" etc. Example of the hook:
apiVersion: ...
kind: ....
metadata:
annotations:
"helm.sh/hook": "pre-install"Full list of Hooks can be found here. In addition there can be used more than one hook.
In this case "pre-upgrade" option resolved the issue which was
"Executes on an upgrade request after templates are rendered, but before any resources are loaded into Kubernetes (e.g. before a Kubernetes apply operation)."