No Resource requests for addons

[jniclas]

Summary

Hey, I am new to microk8s and after deploying a 3-mode cluster and enabling cert-manager, server-metrics, ingress and dns, I only found resource requests in the coredns service, but not on ingress, cert-manager and server-metrics. Is this by design, or do I have to enable the addons with an extra yaml, that specifies resource requests and limits?

Why is this important?

It would be important to manage the resources properly, especially when the cluster uses a lot of addons.

Are you interested in contributing to this feature?

maybe, did not do that for until now.

[ktsakalozos]

Hi @jniclas, welcome to k8s. What do you mean by "resource requests"? Can you give me an example of what kind of manageable resources you have for coredns?

[jniclas]

of course, when I output the coredns values, the service, enabled by microk8s enable dns I get values:

containers:
  - name: coredns
    image: coredns/coredns:1.10.0
    ...
    resources:
      limits:
        memory: 170Mi
      requests:
        cpu: 100m
        memory: 70Mi

But cert-manager has values:

containers:
  - name: cert-manager
    image: quay.io/jetstack/cert-manager-webhook:v1.8.0
    ...
    resources: {}

[ktsakalozos]

Indeed some of the manifests in the addons do not specify any resource requests and limits [1]. One way to set them is to edit the yaml files you find under /var/snap/microk8s/common/addons/core/addons/the_addon_name/ before enabling the addon.

[1] https://kubernetes.io/docs/concepts/configuration/manage-resources-containers

[jniclas]

ah ok, thanks!