Removes a namespace stuck in terminating status

force-remove-namespace.sh

#!/bin/bash
set -e

# Check if the NAMESPACE argument is provided
if [ -z "$1" ]; then
  echo "Error: NAMESPACE argument not provided"
  echo "Usage: $0 NAMESPACE"
  exit 1
fi

# Check if more than one argument is provided
if [ $# -gt 1 ]; then
  echo "Error: Too many arguments provided"
  echo "Usage: $0 NAMESPACE"
  exit 1
fi

# Get the namespace from the first argument
NAMESPACE=$1

echo "Getting namespace ${NAMESPACE}..."
# Save the output of the command in a variable
output=$(kubectl get namespace ${NAMESPACE} -o json)

if [[ $(echo $output | jq '.spec.finalizers') == "null" ]]; then
    # Run kubectl delete ns $NAMESPACE in the background
    kubectl delete ns $NAMESPACE &
    # Get the process ID of kubectl delete ns $NAMESPACE
    pid=$!
    # Set a timeout of 8 seconds
    timeout=8
    # Wait for kubectl delete ns $NAMESPACE to complete or until the timeout is reached
    while kill -0 $pid 2> /dev/null && ((timeout-- > 0)); do sleep 1; done
    # If kubectl delete ns $NAMESPACE is still running after the timeout, terminate it and rerun the script from the top
    if kill -0 $pid 2> /dev/null; then
        kill $pid
        exec "$0" "$@"
    fi
else
    echo "Editing JSON response to remove finalizer..."
    # Edit the JSON response to remove the finalizer
    edited_output=$(echo $output | jq 'del(.spec.finalizers[])')

    TEMPDIR=$(mktemp -d)
    # Save the edited JSON to a temporary file
    echo $edited_output > $TEMPDIR/tmp.json

    echo "Running kubectl proxy in the background..."
    # Run kubectl proxy in the background
    kubectl proxy &
    sleep 5
    # Get the process ID of kubectl proxy
    proxy_pid=$!

    echo "Executing curl command..."
    # Execute the curl command and retry up to 3 times if it fails
    retries=0
    max_retries=3
    until [ $retries -ge $max_retries ]
    do
      curl -k -H "Content-Type: application/json" -X PUT --data-binary @$TEMPDIR/tmp.json http://127.0.0.1:8001/api/v1/namespaces/${NAMESPACE}/finalize && break
      retries=$[$retries+1]
      echo "Curl command failed, retrying... ($retries/$max_retries)"
    done

    if [ $retries -ge $max_retries ]; then
      echo "Curl command failed after $max_retries attempts, exiting."
      exit 1
    fi

    echo "Ending kubectl proxy process..."
    # End the kubectl proxy process
    kill $proxy_pid

    echo "Removing temporary file..."
    # Remove tmp file
    rm -rf $TEMPDIR/tmp.json

fi

echo "Done."

curl -sL https://gist.githubusercontent.com/codesenju/e08998e8da083524f5e77993ed46728c/raw/c1cbb3bfacd76b1d4778de1ec84be2a36b1a4587/force-remove-namespace.sh | bash -s -- [NAMESPACE]