How to use --wait with post-install hook in helm?

Question

I use an install script in a post-install hook. When I run helm install with --wait option, helm waits that all pods are ready, but helm does not launch post-install hooks script. Then, the pods are not yet ready (pods are waiting for install script to finish).

I tried with pre-install hook instead, but the install script needs other services to be running...

PS: it works fine if I don't use "--wait", but CI from gitlab won't fail if there is an error during pod startups.

Is there a way to run the post-install hooks during the helm install --wait period?

Filip Nikolov · Answer 1 · 2020-02-18T14:11:02.323

2

I don't think you can solve your problem with Helm post-install hook, but you may with vanilla Kubernetes jobs or perhaps hooks, i.e. running job/hook along with your deployment that will depend only on Kubernetes.

One of the first things to try is to remove helm.sh/hook annotations from your existing job.

  annotations:
    # This is what defines this resource as a hook. Without this line, the
    # job is considered part of the release.
    "helm.sh/hook": post-install
    "helm.sh/hook-weight": "-5"
    "helm.sh/hook-delete-policy": hook-succeeded

Helm can then wait for them to finish as they will be executed by Kubernetes.

edited Feb 18 '20 at 14:11

answered Feb 17 '20 at 20:35

Filip Nikolov

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unfortunately, if I remove the "install" hook, the install script will be launched at upgrades too... – Vincent J Feb 18 '20 at 13:46
Just throwing two idea here: Is it not possible to use some kind of persistent storage to store the state of the script - installed / not installed? Or check with the script if given resource/object is present before executing? – Filip Nikolov Feb 18 '20 at 14:15
In a similar situation, I wrapped the job in a `{{- if .Release.IsInstall -}}`. That way it is only created during the initial install - not on subsequent upgrades. See https://helm.sh/docs/chart_template_guide/builtin_objects/. – tfischbach Oct 21 '21 at 07:27

score 0 · Answer 2 · edited Apr 06 '22 at 08:32

0

You can use delete policy

annotations:
    # This is what defines this resource as a hook. Without this line, the
    # job is considered part of the release.
    "helm.sh/hook": post-install
    "helm.sh/hook-weight": "-10"
    "helm.sh/hook-delete-policy": hook-succeeded , hook-failed , before-hook-creation

edited Apr 06 '22 at 08:32

Vincent J

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answered Apr 06 '22 at 06:14

ashish kumar mishra

1

How to use --wait with post-install hook in helm?

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