Namespace stuck in terminating state

Problem

User wants to delete namespace and remove all resources. after the command kubectl delete <NAMESPACE>. namespace is not removed when examine kubectl get namespace

Solution 

run the following command to export namespace settings

kubectl get namespace <NAMESPACE> -o json > namespacee.json

edit the file and search for this lines

”spec”: {
“finalizers”: [
“kubernetes”
]
},

remove the word kubernetes from the text sample:

“spec”: {
”finalizers”: [
]
},

save the file and run the following command

kubectl replace –raw “/api/v1/namespaces/<NAMESPACE>/finalize” -f ./namespace.json

check that the name space has been removed

kubectl get namespace

Another Option

Run the following commands to remove the namespace

NAMESPACE=cert-manager
kubectl get namespace $NAMESPACE -o json > $NAMESPACE.json
sed -i -e ‘s/”kubernetes”//’ $NAMESPACE.json
kubectl replace –raw “/api/v1/namespaces/$NAMESPACE/finalize” -f ./$NAMESPACE.json

Attachment: commands.txt