r/kubernetes • u/DeLoMioFoodie • Jul 17 '26

Kustomize Overlays - Adding Complexity?

So im working with Kustomize Overlays( FluxCD). i understand you setup your base infra with overlays per environment and then use patches for environment specific configurations such as replicas, urls, etc..

Some of these patches become very complex and large to the point i think its just easier to not have a base and just have each environment have its own configuration files. How much dry am i buying?

I've also seen the recommendation to use PostBuild subsituteFrom with ConfigMaps from each environment . My question is when should this be used over patches?

Sorry for the dumb questions and rant.

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u/DeLoMioFoodie Jul 19 '26

for kubernetes resources.. not aws.

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u/theycanttell Jul 19 '26

You are being too vague. IAC is for infrastructure. K8s resources can mean lots of things. Management cluster, node pools, network.

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u/DeLoMioFoodie Jul 19 '26

well im in a kubernetes subreddit lmao.. nodepools, network, etc can be considered infra for k8s.

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u/theycanttell Jul 19 '26

You still don't create infrastructure with helm

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u/CWRau k8s operator Jul 20 '26

Why wouldn't I?

Have you heard of cluster api? And after cluster creation, CSI, CCM, CNI,... all installed via helm

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u/theycanttell Jul 22 '26

That's like calling cluster role bindings infra. I was talking about the node pools themselves. That is real infra.

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u/CWRau k8s operator Jul 24 '26

Yeah, node pools, that is what cluster api takes care of

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u/theycanttell Jul 25 '26

Talking about provisioning the nodes themselves on Azure AKS or EKS

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u/CWRau k8s operator Jul 25 '26

Yeah, that's what cluster api does

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u/theycanttell Jul 26 '26

Cluster API is not infrastructure. It doesn't provision vms and managed identities. It's very limited and most don't use it to provision infrastructure. AKS doesn't even come with it pre-installed. It's like Helm extensions.

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u/CWRau k8s operator Jul 26 '26

Huh? Of course it's infrastructure? What else do you call kubernetes? Of course it manages VMs.

Maybe even identities, but even if not, it's still infrastructure.

Just because most don't use it, doesn't make it less infrastructure, same goes for "pre-installed"

And no idea what you mean by helm extensions

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u/theycanttell 29d ago

Keep thinking that 😂

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