kubernetes empty namespaces with golang

Question

how to get the list of the empty namespaces in kubernetes through go?

I want to write a code in golng by which I can find empty namespaces in kubernetes

What have you tried? Include your code. What problems did you encounter? — Jonathan Hall, Jan 12 '23 at 10:54
Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. — Community, Jan 12 '23 at 11:38
Can you Refer this [SO](https://stackoverflow.com/questions/72406262/l) which helps to List all namespaces in k8s using Go and Develop for empty namespaces. — Hemanth Kumar, Jan 12 '23 at 11:40
I used following command to find and delete empty namespaces in bash — Saeed Kazemi, Jan 17 '23 at 09:57
kubectl get ns --no-headers -o custom-columns=":metadata.name" | xargs -I{} kubectl get all -n {} 2>&1 | grep "No" | cut -d " " -f 5 | xargs -I{} kubectl delete namespace {} — Saeed Kazemi, Jan 17 '23 at 09:57
I need to run this bash in go so I can handle it more easily — Saeed Kazemi, Jan 17 '23 at 09:57

score 0 · Answer 1 · answered Jan 12 '23 at 11:43

You can use a Kubernetes golang client to connect to your namespace and get all resources you want e.g. Pods and Deployments. So you can check if there is any resources or not. For example, this code checks if there is a Deployment or not:

package main

import (
    "context"
    "fmt"

    metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    "k8s.io/client-go/kubernetes"
    ctrl "sigs.k8s.io/controller-runtime"
)

func main() {
    ctx := context.Background()
    config := ctrl.GetConfigOrDie()
    clientset := kubernetes.NewForConfigOrDie(config)

    namespace := "namespace"
    list, err := clientset.AppsV1().Deployments(namespace).List(ctx, metav1.ListOptions{})
    if err != nil {
        return
    }
    fmt.Printf("Namespace has %d Deployments", len(list.Items))
}

You can check the count of other resources as well.

You can get the list of namespaces and create a loop of them and find empty namespaces @SaeedKazemi — Amin Rashidbeigi, Jan 20 '23 at 13:06

kubernetes empty namespaces with golang

1 Answers1