tests: Add k8s-file-volume test

This imports the k8s-file-volume test from the tests repo and modifies
it slightly to set up the host volume on the AKS host.

Signed-off-by: Aurélien Bombo <abombo@microsoft.com>

tests/integration/kubernetes/k8s-file-volume.bats

@@ -0,0 +1,47 @@
+#!/usr/bin/env bats
+#
+# Copyright (c) 2022 Ant Group
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+load "${BATS_TEST_DIRNAME}/../../common.bash"
+load "${BATS_TEST_DIRNAME}/tests_common.sh"
+TEST_INITRD="${TEST_INITRD:-no}"
+
+setup() {
+	[ "${KATA_HYPERVISOR}" == "firecracker" ] && skip "test not working see: ${fc_limitations}"
+	pod_name="test-file-volume"
+	container_name="busybox-file-volume-container"
+	tmp_file=$(exec_host mktemp /tmp/file-volume-test-foo.XXXXX)
+	mount_path="/tmp/foo.txt"
+	file_body="test"
+	get_pod_config_dir
+}
+
+@test "Test readonly volume for pods" {
+	[ "${KATA_HYPERVISOR}" == "firecracker" ] && skip "test not working see: ${fc_limitations}"
+	# Write test body to temp file
+	exec_host "echo "$file_body" > $tmp_file"
+
+	# Create test yaml
+	sed -e "s|HOST_FILE|$tmp_file|" ${pod_config_dir}/pod-file-volume.yaml > ${pod_config_dir}/test-pod-file-volume.yaml
+	sed -i "s|MOUNT_PATH|$mount_path|" ${pod_config_dir}/test-pod-file-volume.yaml
+
+	# Create pod
+	kubectl create -f "${pod_config_dir}/test-pod-file-volume.yaml"
+
+	# Check pod creation
+	kubectl wait --for=condition=Ready --timeout=$timeout pod "$pod_name"
+
+	# Validate file volume body inside the pod
+	file_in_container=$(kubectl exec $pod_name -- cat $mount_path)
+	[ "$file_body" == "$file_in_container" ]
+}
+
+teardown() {
+	[ "${KATA_HYPERVISOR}" == "firecracker" ] && skip "test not working see: ${fc_limitations}"
+	kubectl delete pod "$pod_name"
+	exec_host rm -f $tmp_file
+	rm -f ${pod_config_dir}/test-pod-file-volume.yaml.yaml
+}

tests/integration/kubernetes/run_kubernetes_tests.sh

@@ -28,6 +28,7 @@ else
 		"k8s-empty-dirs.bats" \
 		"k8s-env.bats" \
 		"k8s-exec.bats" \
+		"k8s-file-volume.bats" \
 		"k8s-inotify.bats" \
 		"k8s-job.bats" \
 		"k8s-kill-all-process-in-container.bats" \