clean-clusters.sh

#!/bin/bash

# Copyright 2020 Red Hat Inc.

# Parameters
# -k, --keep-providers Keeping all provider connections that are not in Advanced Cluster Management namespaces.
# -t Runs a test, but does not perform any actions

CLEAN_RESOURCES=0
KEEP_PROVIDERS=0

for arg in "$@"
do
    case $arg in
        -k|--keep-providers)
        KEEP_PROVIDERS=1
        shift
        ;;
        -t)
        CLEAN_RESOURCES=1
        shift
        ;;
        *)
        echo "Unrecognized argument: $1"
        shift
        ;;
    esac
done

echo "Continuing to execute this script will destroy the following \"managed\" Openshift clusters:"
oc get clusterDeployments --all-namespaces
echo
echo "If you would like to proceed with cleanup, type: DESTROY"
read -r DESTROY_YES
if [ "${DESTROY_YES}" != "DESTROY" ]; then
  echo "You must type DESTROY to clean up the Hive deployed clusters"
  exit 1
fi
for clusterName in `oc get clusterDeployments --all-namespaces --ignore-not-found | grep -v "NAMESPACE" | awk '{ print $1 }'`; do
    echo "Destroying ${clusterName}"
    if [ $CLEAN_RESOURCES ]; then
        oc -n ${clusterName} delete clusterDeployment ${clusterName} --wait=false
        sleep 10
        podName=`oc -n ${clusterName} get pods | grep uninstall | awk '{ print $1 }'`
        oc -n ${clusterName} logs ${podName} -f
    fi
done

echo "Detaching imported clusters (rhacm 1.0)"
for clusterName in `oc get clusters --all-namespaces --ignore-not-found | grep -v "NAMESPACE" | awk '{ print $1 }'`; do
    printf " Detaching cluster ${clusterName}\n  "
    if [ $CLEAN_RESOURCES ]; then
        oc -n ${clusterName} delete cluster ${clusterName}
        printf "  "  #Spacing
        oc delete namespace ${clusterName} --wait=false
    fi
done

# Stage2, 2nd pass
echo "Second pass cleaning, by endpointConfig"
for clusterName in `oc get endpointconfig --all-namespaces --ignore-not-found | grep -v "NAMESPACE" | awk '{ print $1 }'`; do
    printf " Detaching cluster ${clusterName}\n  "
    if [ $CLEAN_RESOURCES ]; then
        oc -n ${clusterName} delete cluster ${clusterName}
        printf "  "  #Spacing
        oc delete namespace ${clusterName} --wait=false
    fi
done

echo "Detaching imported clusters (rhacm 2.0+)"
for clusterName in `oc get managedcluster --ignore-not-found | grep -v "NAME" | awk '{ print $1 }'`; do
    printf " Detaching cluster ${clusterName}\n  "
    if [ $CLEAN_RESOURCES ]; then
        DELETE_MANAGEDCLUSTER=1
        oc delete managedcluster ${clusterName} --wait=false
        printf "  "  #Spacing
        oc -n ${clusterName} delete klusterletaddonconfig ${clusterName} --wait=false
    fi
done

if [ $DELETE_MANAGEDCLUSTER ] ; then
    echo "Wait 100 seconds"
    sleep 100
fi

echo "Deleting manifestworks"
for clusterName in `oc get managedcluster --ignore-not-found | grep -v "NAME" | awk '{ print $1 }'`; do
    printf " Removing manifestworks in ${clusterName}\n  "
    if [ $CLEAN_RESOURCES ]; then
        oc delete manifestwork -n ${clusterName} --wait=false --all
        printf "  "  #Spacing
        oc delete lease -n ${clusterName} cluster-lease-${clusterName}
        printf "  "  #Spacing
        oc delete ns ${clusterName} --wait=false
    fi
done

if [ $DELETE_MANAGEDCLUSTER ] ; then
    echo "Wait 20 seconds"
    sleep 20
fi

echo "Force deleting all resources"
for clusterName in  `oc get managedcluster --ignore-not-found | grep -v "NAME" | awk '{ print $1 }'`; do
    printf " Force removing all manifestwork, klusterletaddonconfig on cluster ${clusterName}\n  "
    if [ $CLEAN_RESOURCES ]; then
        oc get manifestwork -n  ${clusterName} | grep -v NAME | awk '{print $1}' | xargs -n1 oc patch manifestwork -n  ${clusterName} -p '{"metadata":{"finalizers":[]}}' --type=merge
        printf "  "  #Spacing
        oc patch klusterletaddonconfig -n ${clusterName} ${clusterName} -p '{"metadata":{"finalizers":[]}}' --type=merge
        printf "  "  #Spacing
        oc patch managedcluster -n ${clusterName} ${clusterName} -p '{"metadata":{"finalizers":[]}}' --type=merge
    fi
done
sleep 5

if [ "$KEEP_PROVIDERS" -eq 1 ]; then
   echo "Keeping the following provider connections"
   # 2.2 and older
   oc get secrets -l cluster.open-cluster-management.io/provider --ignore-not-found -A
   # 2.3 and newer
   oc get secrets -l cluster.open-cluster-management.io/credentials --ignore-not-found -A
else
   echo "Deleting provider connections"
   # 2.2 and older
   oc delete secrets -l cluster.open-cluster-management.io/provider --ignore-not-found -A
   # 2.3 and newer
   oc delete secrets -l cluster.open-cluster-management.io/credentials --ignore-not-found -A
fi


echo "Done!"