Kubernetes Metric API is not available
- Dominant language
- Java
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Description
##### ISSUE TYPE
* Improvement Request
##### COMPONENT NAME
Kubernetes
##### CLOUDSTACK VERSION
4.18
##### CONFIGURATION
advanced networking used
##### OS / ENVIRONMENT
All servers on ubuntu 22.04
##### SUMMARY
When a kubernetes cluster is spinned up metric API is not available. We will have to configure metric API manually. Without metric API horizontal pod auto scale will not work and also kubernetes admin won't able to know the utilisation each pod and node is accuring.
There are different way to enable metric API but I feel more easy on below steps.
Step 1 : Check metric API
kubectl top nodes
(it will show metric API not available error)
Step2: Install metric API from kubernetes git
kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
Step 3: Check metric pod is running
Kubectl -n kube-system get pods
Step 4: Edit metric server deployement and below line
kubectl -n kube-system edit deploy metrics-server
command:
- /metrics-server
- --kubelet-insecure-tls
- --kubelet-preferred-address-types=InternalIP
Step 5: Check metric API
kubectl top nodes
##### STEPS TO REPRODUCE
Just bring up a cluster and type kubectl top nodes command will get metric API unavailable message
##### EXPECTED RESULTS
If a user bring up a kubernetes cluster they should get maximum componenets on cluster so that they don't want to go around for each. If any changes on this can be done please do the needful so it can help users using kubernetes on cloudstack
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Assessment
This issue has not been assessed yet.