ci: add script to run external-storage e2e tests

The run-k8s-external-storage-e2e.sh script downloads the kubernetes-test
components, creates a configuration for RBD and CephFS drivers and runs
the external-storage tests on the current cluster.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

run-k8s-external-storage-e2e.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+#
+# Download the Kubernetes test suite, extract it and run the external-storage suite.
+#
+# Requirements:
+# - KUBE_VERSION needs to be set in the environment (format: "v1.18.5")
+
+# exit on failure
+set -e
+
+[ -n "${KUBE_VERSION}" ] || { echo "KUBE_VERSION not set" ; exit 1 ; }
+
+# download and extract the tests
+curl -LO "https://storage.googleapis.com/kubernetes-release/release/${KUBE_VERSION}/kubernetes-test-linux-amd64.tar.gz"
+tar xzf kubernetes-test-linux-amd64.tar.gz kubernetes/test/bin/ginkgo kubernetes/test/bin/e2e.test
+
+for driver in /opt/build/go/src/github.com/ceph/ceph-csi/scripts/k8s-storage/driver-*.yaml
+do
+	kubernetes/test/bin/ginkgo \
+		-focus="External.Storage.*.csi.ceph.com" \
+		-skip='\[Feature:|\[Disruptive\]' \
+		kubernetes/test/bin/e2e.test \
+		-- \
+		-storage.testdriver="${driver}"
+done