ci: skip snapshot E2E if kube<1.17+

snapshot beta CRD wont work if the
kubernetes version is less than 1.17.0
as the snapshot CRD wont be installed
we cannot test the snapshot,so disabling
it if the kube version is less than 1.17

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

e2e/rbd.go

@@ -234,8 +234,14 @@ var _ = Describe("RBD", func() {
 				createRBDStorageClass(f.ClientSet, f, nil, nil)
 			})
 
-			// skipping snapshot testing
 			By("create a PVC clone and Bind it to an app", func() {
+				v, err := f.ClientSet.Discovery().ServerVersion()
+				if err != nil {
+					e2elog.Logf("failed to get server version with error %v", err)
+					Fail(err.Error())
+				}
+				// snapshot beta is only supported from v1.17+
+				if v.Major > "1" || (v.Major == "1" && v.Minor >= "17") {
 					createRBDSnapshotClass(f)
 					pvc, err := loadPVC(pvcPath)
 					if err != nil {
@@ -281,6 +287,7 @@ var _ = Describe("RBD", func() {
 					if err != nil {
 						Fail(err.Error())
 					}
+				}
 			})
 
 			By("create a block type PVC and Bind it to an app", func() {

scripts/travis-functest.sh

@@ -4,19 +4,35 @@ set -e
 # This script will be used by travis to run functional test
 # against different kuberentes version
 export KUBE_VERSION=$1
+
+# parse the kubernetes version, return the digit passed as argument
+# v1.17.0 -> kube_version 1 -> 1
+# v1.17.0 -> kube_version 2 -> 17
+kube_version() {
+    echo "${KUBE_VERSION}" | sed 's/^v//' | cut -d'.' -f"${1}"
+}
 sudo scripts/minikube.sh up
 sudo scripts/minikube.sh deploy-rook
 sudo scripts/minikube.sh create-block-pool
 # pull docker images to speed up e2e
 sudo scripts/minikube.sh cephcsi
 sudo scripts/minikube.sh k8s-sidecar
+sudo chown -R travis: "$HOME"/.minikube /usr/local/bin/kubectl
+KUBE_MAJOR=$(kube_version 1)
+KUBE_MINOR=$(kube_version 2)
+# skip snapshot operation if kube version is less than 1.17.0
+if [[ "${KUBE_MAJOR}" -ge 1 ]] && [[ "${KUBE_MINOR}" -ge 17 ]]; then
     # delete snapshot CRD created by ceph-csi in rook
     scripts/install-snapshot.sh delete-crd
     # install snapshot controller
     scripts/install-snapshot.sh install
-sudo chown -R travis: "$HOME"/.minikube /usr/local/bin/kubectl
+fi
+
 # functional tests
 go test github.com/ceph/ceph-csi/e2e --deploy-timeout=10 -timeout=30m --cephcsi-namespace=cephcsi-e2e-$RANDOM -v -mod=vendor
 
+if [[ "${KUBE_MAJOR}" -ge 1 ]] && [[ "${KUBE_MINOR}" -ge 17 ]]; then
+    # delete snapshot CRD
     scripts/install-snapshot.sh cleanup
+fi
 sudo scripts/minikube.sh clean

scripts/travis-helmtest.sh

@@ -4,6 +4,12 @@ set -e
 # This script will be used by travis to run functional test
 # against different kuberentes version
 export KUBE_VERSION=$1
+# parse the kubernetes version, return the digit passed as argument
+# v1.17.0 -> kube_version 1 -> 1
+# v1.17.0 -> kube_version 2 -> 17
+kube_version() {
+    echo "${KUBE_VERSION}" | sed 's/^v//' | cut -d'.' -f"${1}"
+}
 sudo scripts/minikube.sh up
 sudo scripts/minikube.sh deploy-rook
 sudo scripts/minikube.sh create-block-pool
@@ -15,10 +21,15 @@ sudo chown -R travis: "$HOME"/.minikube /usr/local/bin/kubectl
 NAMESPACE=cephcsi-e2e-$RANDOM
 # create ns for e2e
 kubectl create ns ${NAMESPACE}
+KUBE_MAJOR=$(kube_version 1)
+KUBE_MINOR=$(kube_version 2)
+# skip snapshot operation if kube version is less than 1.17.0
+if [[ "${KUBE_MAJOR}" -ge 1 ]] && [[ "${KUBE_MINOR}" -ge 17 ]]; then
     # delete snapshot CRD created by ceph-csi in rook
     scripts/install-snapshot.sh delete-crd
     # install snapshot controller
     scripts/install-snapshot.sh install
+fi
 # set up helm
 scripts/install-helm.sh up
 # install cephcsi helm charts
@@ -27,7 +38,11 @@ scripts/install-helm.sh install-cephcsi ${NAMESPACE}
 go test github.com/ceph/ceph-csi/e2e -mod=vendor --deploy-timeout=10 -timeout=30m --cephcsi-namespace=${NAMESPACE} --deploy-cephfs=false --deploy-rbd=false -v
 
 #cleanup
+# skip snapshot operation if kube version is less than 1.17.0
+if [[ "${KUBE_MAJOR}" -ge 1 ]] && [[ "${KUBE_MINOR}" -ge 17 ]]; then
+    # delete snapshot CRD
     scripts/install-snapshot.sh cleanup
+fi
 scripts/install-helm.sh cleanup-cephcsi ${NAMESPACE}
 scripts/install-helm.sh clean
 kubectl delete ns ${NAMESPACE}