added script for kserve uninstallation

Change-Id: If0d078ec45fc8f2f930ec43f7775637fb477bb86
Signed-off-by: hoejoo.lee <hoejoo.lee@samsung.com>

diff --git a/bin/uninstall_kserve.sh b/bin/uninstall_kserve.sh
new file mode 100755 (executable)
index 0000000..b345864
--- /dev/null
+++ b/bin/uninstall_kserve.sh
@@ -0,0 +1,96 @@
+#!/bin/bash
+
+set -u
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+cd "$DIR" || exit
+
+# import configs
+source ${DIR}/../tools/kserve/config.sh
+
+function wait_for_pods_terminate() {
+    echo -n "waiting for $1 pods to terminates"
+
+    STILL_WAITING=true
+    while $STILL_WAITING; do
+        PODS=$(kubectl get pods -n $2 2>/dev/null | grep $1 | awk '{print $1}')
+        if [ -z "$PODS" ]; then
+            STILL_WAITING=false
+        else
+            echo -n "."
+            sleep 1
+        fi
+    done
+
+    echo
+}
+
+########## Uninstall Kserve ##########
+kubectl delete --timeout=10s -f https://raw.githubusercontent.com/kserve/kserve/master/install/${KSERVE_VERSION}/kserve.yaml
+KSERVE_STATEFULSETS="kserve-controller-manager"
+for KSERVE_STATEFULSET in $KSERVE_STATEFULSETS; do
+    wait_for_pods_terminate $KSERVE_STATEFULSET "kserve-system"
+done
+
+########## Uninstall Cert Manager ##########
+kubectl delete --timeout=10s -f https://github.com/jetstack/cert-manager/releases/download/${CERT_MANAGER_VERSION}/cert-manager.yaml
+CERT_MANAGER_DEPLOYMENTS="cert-manager cert-manager-cainjector cert-manager-webhook"
+for CERT_MANAGER_DEPLOYMENT in $CERT_MANAGER_DEPLOYMENTS; do
+    wait_for_pods_terminate $CERT_MANAGER_DEPLOYMENT "cert-manager"
+done
+
+########## Uninstall Knative ##########
+kubectl delete -f https://github.com/knative/net-istio/releases/download/${KNATIVE_VERSION}/release.yaml
+KNATIVE_DEPLOYMENTS="networking-istio istio-webhook"
+for KNATIVE_DEPLOYMENT in $KNATIVE_DEPLOYMENTS; do
+    wait_for_pods_terminate $KNATIVE_DEPLOYMENT "knative-serving"
+done
+
+set +e
+kubectl delete -f https://github.com/knative/serving/releases/download/${KNATIVE_VERSION}/serving-core.yaml       
+kubectl delete -f https://github.com/knative/serving/releases/download/${KNATIVE_VERSION}/serving-crds.yaml       
+set -e
+KNATIVE_DEPLOYMENTS="autoscaler controller webhook activator"
+for KNATIVE_DEPLOYMENT in $KNATIVE_DEPLOYMENTS; do
+    wait_for_pods_terminate $KNATIVE_DEPLOYMENT "knative-serving"
+done
+
+# temp dir
+WORK_DIR=$(mktemp -d -p "${DIR}")
+if [[ ! "$WORK_DIR" || ! -d "$WORK_DIR" ]]; then
+    echo "Could not create temp dir"
+    exit 1
+fi
+cd "${WORK_DIR}"
+
+# deletes the temp directory
+function cleanup() {
+    rm -rf "$WORK_DIR"
+    echo "Deleted temp working directory $WORK_DIR"
+}
+
+# register the cleanup function to be called on the EXIT signal
+trap cleanup EXIT
+
+########## Uninstall Istio ##########
+ISTIO_OPTIONS="ISTIO_VERSION TARGET_ARCH"
+for ISTIO_OPTION in $ISTIO_OPTIONS; do
+    if [ -z "${!ISTIO_OPTION}" ]; then
+        echo "$ISTIO_OPTION is empty"
+        exit 1
+    fi
+done
+
+curl -L https://istio.io/downloadIstio | ISTIO_VERSION=$ISTIO_VERSION TARGET_ARCH=$TARGET_ARCH sh -
+
+pushd "./istio-${ISTIO_VERSION}/bin"
+./istioctl verify-install
+./istioctl x uninstall --purge -y
+popd
+
+ISTIO_DEPLOYMENTS="istiod cluster-local-gateway istio-ingressgateway"
+for ISTIO_DEPLOYMENTS in $ISTIO_DEPLOYMENTS; do
+    wait_for_pods_terminate $ISTIO_DEPLOYMENTS "istio-system"
+done
+kubectl delete namespace istio-system
+