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kubedb · Mar 9, 2018 · 9828262 · 9828262
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diff --git a/docs/setup/uninstall.md b/docs/setup/uninstall.md
@@ -14,25 +14,26 @@ section_menu_id: setup
 
 # Uninstall KubeDB
 
-Please follow the steps below to uninstall KubeDB:
+To uninstall KubeDB operator, run the following command:
 
-- Delete the deployment and service used for KubeDB operator.
+```console
+$ curl -fsSL https://raw.githubusercontent.com/kubedb/cli/0.8.0-beta.2/hack/deploy/kubedb.sh \
+    | bash -s -- --uninstall [--namespace=NAMESPACE]
 
-    ```console
-    $ curl -fsSL https://raw.githubusercontent.com/kubedb/cli/0.8.0-beta.2/hack/deploy/kubedb.sh \
-        | bash -s -- --uninstall [--namespace=NAMESPACE]
++ kubectl delete deployment -l app=kubedb -n kube-system
+deployment "kubedb-operator" deleted
++ kubectl delete service -l app=kubedb -n kube-system
+service "kubedb-operator" deleted
++ kubectl delete serviceaccount -l app=kubedb -n kube-system
+No resources found
++ kubectl delete clusterrolebindings -l app=kubedb -n kube-system
+No resources found
++ kubectl delete clusterrole -l app=kubedb -n kube-system
+No resources found
+```
+
+The above command will leave the KubeDB crd objects as-is. If you wish to **nuke** all KubeDB crd objects, also pass the `--purge` flag. This will keep a copy of KubeDB crd objects in your current directory.
 
-    + kubectl delete deployment -l app=kubedb -n kube-system
-    deployment "kubedb-operator" deleted
-    + kubectl delete service -l app=kubedb -n kube-system
-    service "kubedb-operator" deleted
-    + kubectl delete serviceaccount -l app=kubedb -n kube-system
-    No resources found
-    + kubectl delete clusterrolebindings -l app=kubedb -n kube-system
-    No resources found
-    + kubectl delete clusterrole -l app=kubedb -n kube-system
-    No resources found
-    ```
 
 - Now, wait several seconds for KubeDB to stop running. To confirm that KubeDB operator pod(s) have stopped running, run:
 

diff --git a/hack/deploy/kubedb.sh b/hack/deploy/kubedb.sh
@@ -1,6 +1,8 @@
 #!/bin/bash
 set -eou pipefail
 
+crds=(elasticsearches memcacheds mongodbs mysqls postgreses redises snapshots dormantdatabases)
+
 echo "checking kubeconfig context"
 kubectl config current-context || { echo "Set a context (kubectl use-context <context>) out of the following:"; echo; kubectl config get-contexts; exit 1; }
 echo ""
@@ -52,6 +54,7 @@ export KUBEDB_ENABLE_ADMISSION_WEBHOOK=false
 export KUBEDB_DOCKER_REGISTRY=kubedb
 export KUBEDB_IMAGE_PULL_SECRET=
 export KUBEDB_UNINSTALL=0
+export KUBEDB_PURGE=0
 
 KUBE_APISERVER_VERSION=$(kubectl version -o=json | $ONESSL jsonpath '{.serverVersion.gitVersion}')
 $ONESSL semver --check='>=1.9.0' $KUBE_APISERVER_VERSION
@@ -73,6 +76,7 @@ show_help() {
     echo "    --run-on-master                run kubedb operator on master"
     echo "    --enable-admission-webhook     configure admission webhook for kubedb CRDs"
     echo "    --uninstall                    uninstall kubedb"
+    echo "    --purge                        purges kubedb crd objects and crds"
 }
 
 while test $# -gt 0; do
@@ -129,6 +133,10 @@ while test $# -gt 0; do
             export KUBEDB_UNINSTALL=1
             shift
             ;;
+        --purge)
+            export KUBEDB_PURGE=1
+            shift
+            ;;
         *)
             show_help
             exit 1
@@ -150,6 +158,43 @@ if [ "$KUBEDB_UNINSTALL" -eq 1 ]; then
     kubectl delete rolebindings -l app=kubedb --namespace $KUBEDB_NAMESPACE
     kubectl delete role -l app=kubedb --namespace $KUBEDB_NAMESPACE
 
+    echo "waiting for kubedb operator pod to stop running"
+    for (( ; ; )); do
+       pods=($(kubectl get pods --all-namespaces -l app=kubedb -o jsonpath='{range .items[*]}{.metadata.name} {end}'))
+       total=${#pods[*]}
+        if [ $total -eq 0 ] ; then
+            break
+        fi
+       sleep 2
+    done
+
+    # https://github.com/kubernetes/kubernetes/issues/60538
+    if [ "$KUBEDB_PURGE" -eq 1 ]; then
+        for crd in "${crds[@]}"; do
+            pairs=($(kubectl get ${crd}.kubedb.com --all-namespaces -o jsonpath='{range .items[*]}{.metadata.name} {.metadata.namespace} {end}' || true))
+            total=${#pairs[*]}
+
+            # save objects
+            if [ $total -gt 0 ]; then
+                echo "dumping ${crd} objects into ${crd}.yaml"
+                kubectl get ${crd}.kubedb.com --all-namespaces -o yaml > ${crd}.yaml
+            fi
+
+            for (( i=0; i<$total; i+=2 )); do
+                # remove finalizers
+                kubectl patch ${crd}.kubedb.com ${pairs[$i]} -n ${pairs[$i + 1]}  -p '{"metadata":{"finalizers":[]}}' --type=merge
+                # delete crd object
+                echo "deleting ${crd} ${pairs[$i + 1]}/${pairs[$i]}"
+                kubectl delete ${crd}.kubedb.com ${pairs[$i]} -n ${pairs[$i + 1]}
+            done
+
+            # delete crd
+            kubectl delete crd ${crd}.kubedb.com || true
+        done
+    fi
+
+    echo
+    echo "Successfully uninstalled KubeDB!"
     exit 0
 fi
 
@@ -189,21 +234,17 @@ if [ "$KUBEDB_ENABLE_ADMISSION_WEBHOOK" = true ]; then
     curl -fsSL https://raw.githubusercontent.com/kubedb/cli/0.8.0-beta.2/hack/deploy/admission.yaml | $ONESSL envsubst | kubectl apply -f -
 fi
 
+echo
 echo "waiting until kubedb operator deployment is ready"
 $ONESSL wait-until-ready deployment kubedb-operator --namespace $KUBEDB_NAMESPACE || { echo "KubeDB operator deployment failed to be ready"; exit 1; }
 
 echo "waiting until kubedb apiservice is available"
 $ONESSL wait-until-ready apiservice v1alpha1.admission.kubedb.com || { echo "KubeDB apiservice failed to be ready"; exit 1; }
 
 echo "waiting until kubedb crds are ready"
-$ONESSL wait-until-ready crd elasticsearches.kubedb.com || { echo "Elasticsearch CRD failed to be ready"; exit 1; }
-$ONESSL wait-until-ready crd memcacheds.kubedb.com || { echo "Memcached CRD failed to be ready"; exit 1; }
-$ONESSL wait-until-ready crd mongodbs.kubedb.com || { echo "MongoDB CRD failed to be ready"; exit 1; }
-$ONESSL wait-until-ready crd mysqls.kubedb.com || { echo "MySQL CRD failed to be ready"; exit 1; }
-$ONESSL wait-until-ready crd postgreses.kubedb.com || { echo "Postgres CRD failed to be ready"; exit 1; }
-$ONESSL wait-until-ready crd redises.kubedb.com || { echo "Redis CRD failed to be ready"; exit 1; }
-$ONESSL wait-until-ready crd snapshots.kubedb.com || { echo "Snapshot CRD failed to be ready"; exit 1; }
-$ONESSL wait-until-ready crd dormantdatabases.kubedb.com || { echo "DormantDatabase CRD failed to be ready"; exit 1; }
+for crd in "${crds[@]}"; do
+    $ONESSL wait-until-ready crd ${crd}.kubedb.com || { echo "$crd crd failed to be ready"; exit 1; }
+done
 
 echo
 echo "Successfully installed KubeDB operator!"