Provide image digest instead of a tag

[Zebradil]

All or most of victoriametrics custom resource definitions have .spec.image.tag and .spec.image.repository.
But there's no .spec.image.digest. What's the way to set image digest?

Setting tag to something like v1.123.0@sha256xxx... should work in theory.
However, in case of active license, the tag gets a special handling:

operator/internal/controller/operator/factory/build/defaults.go

Lines 978 to 997 in fcb9e74

	func addEntSuffixToTag(versionTag string) string {
	// expected version tag is:
	// vX.Y.Z with optional suffix -
	if !strings.HasPrefix(versionTag, "v") || strings.Count(versionTag, ".") != 2 {
	return versionTag
	}
	idx := strings.Index(versionTag, "-")
	if idx > 0 {
	suffix := versionTag[idx:]
	switch suffix {
	case "-enterprise", "-enterprise-cluster":
	case "-cluster":
	versionTag = versionTag[:idx] + "-enterprise-cluster"
	}
	} else {
	versionTag += "-enterprise"
	}
	return versionTag
	}

It seems that it should work fine for values like v1.123.0-enterprise@sha256xxx..., but I'm not sure if this won't suddenly break in the future.

[AndrewChubatiuk]

set image with digest using image.tag, mentioned logic should not break anything in your case, but only if your image.tag already contains -enterprise suffix, otherwise it can add it. for v1.123.0@sha256xxx and with license set result is v1.123.0@sha256xxx-enterprise. added PR with a fix for this case

[Zebradil]

Got it, thanks!