Allow helm diff failures

[jkroepke]

Follow up from: #1595 (comment)

If a Chart wants to install CRD and Resources, helm diff may fail.

As I know a common workaround in helmfile is to disable the validation (#1124 and. #1373).

But validation is always good and protect agist spell issues or wrong indents, disable it might be the last resort. On Vanilla helm (3.4.1), I didn't need to disable the validation.

In this case an option would be great to just allow failures from helm diff since most in the time the failures are non critical.

I know, I could suppress diff completely.

But I could I suppress diff only on installations? Or what about to disable validation only for helm diff but still enabled for the helm upgrade command?

Thanks

[mumoshu]

@jkroepke Hey! In #1618, I've added disableValidationOnInstall which I believe is exactly the first option you proposed. Would you mind giving it a try?

[jkroepke]

--skip-diff-on-install from your pr looks more interest for me.

[mumoshu]

@jkroepke Yeah- I usually recommend using command-line flags for operational concerns and use YAML config for anything else. So --skip-diff-on-install is definitely an option depending on your situation.

[DjinNO]

It's can be also because of

experiments {
  manifest = true
 }

in Helm Terraform provider