Delete all resources from a Kubernetes namespace.

k8s-delete-ns-resources.sh

#!/usr/bin/env bash

#
# @author Jay Taylor [jaytaylor.com](https://jaytaylor.com)
#
# @date 2019-03-04
#
# Sometimes Kubernetes seems to get stuck and doesn't
# delete the contents of a namespace from my cluster after
# `kubectl delete namespace X` has been run.
#
# This small program lists and deletes each resource from
# the specified namespace.
#
# Also see ctron's "kill-kube-ns", you may need it as a
# last step:
#
#     https://github.com/ctron/kill-kube-ns
#

set -o errexit
set -o pipefail
set -o nounset

if [[ "${DEBUG:-}" =~ ^1|[tT](rue)?|[oO]n?|[yY](es)?$ ]] ; then
    set -o xtrace
fi

if [ -z "${1:-}" ] ; then
    echo 'ERROR: missing required argument: namespace' 1>&2
    exit 1
fi

ns="$1"

kubectl get all -o json --namespace "${ns}" \
    | jq -r '.items[] | .kind + "/" + .metadata.name' \
    | xargs -n1 -IX kubectl delete X --namespace "${ns}"