test(e2e): add script for testing multiple K8s versions

test-resources/bin/kubernetes-versions-test.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: Copyright 2024 Dash0 Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+set -euo pipefail
+set -x
+
+cd "$(dirname "${BASH_SOURCE[0]}")"/../..
+
+all_versions=(
+  # v1.20.2  # not tested
+  # v1.20.15 # fails, this K8s version does not have cronjobs
+  # v1.21.14
+  # v1.22.17
+  # v1.23.17
+  # v1.24.17
+  # v1.25.16
+  # v1.26.15
+  v1.27.16
+  v1.28.15
+  v1.29.10
+  v1.30.6
+  v1.31.2
+)
+
+echo "NOTE: Make sure cloud-provider-kind is running, otherwise tests will fail!"
+
+run_tests_on_kubernetes_version () {
+  local kubernetes_version="${1:-}"
+  if [[ -z "$kubernetes_version" ]]; then
+    echo Missing mandatory argument: Kubernetes Version
+    exit 1
+  fi
+
+  local cluster_name="dash0-operator-playground-$kubernetes_version"
+  kind create cluster \
+    --image "kindest/node:$kubernetes_version" \
+    --name "$cluster_name" \
+    --config test-resources/kind-config.yaml
+
+  # Install a trap to make sure we remove the cluster, even if the e2e tests fail.
+  trap "{ kind delete cluster --name "$cluster_name" ; exit 255; }" EXIT
+
+  # Give the cluster some time to come up, and for cloud-provider-kind to do its thing.
+  sleep 20
+
+  E2E_KUBECTX="kind-$cluster_name" make test-e2e
+
+  # The e2e tests have been successful for this Kubernetes version, remove the bash trap installed above, then delete
+  # the cluster directly.
+  trap - EXIT
+  kind delete cluster --name "$cluster_name"
+}
+
+
+for v in "${all_versions[@]}"; do
+  run_tests_on_kubernetes_version "$v"
+done
+