Issue open-horizon#4108 - Feature Request: Fail on agent-install.sh f…

…or k8s agent if storage class is invalid

Signed-off-by: Le Zhang <[email protected]>

agent-install/agent-install.sh

@@ -1256,6 +1256,8 @@ function get_all_variables() {
 
         # get other variables for cluster agent
         get_variable EDGE_CLUSTER_STORAGE_CLASS 'gp2'
+        check_cluster_storage_class "$EDGE_CLUSTER_STORAGE_CLASS"
+
         get_variable EDGE_CLUSTER_PVC_SIZE "$DEFAULT_PVC_SIZE"
         get_variable AGENT_NAMESPACE "$DEFAULT_AGENT_NAMESPACE"
         get_variable NAMESPACE_SCOPED 'false'
@@ -3307,6 +3309,18 @@ function get_cluster_image_arch() {
     echo $image_arch
 }
 
+# check if the storage class exists in the edge cluster
+function check_cluster_storage_class() {
+    log_debug "check_cluster_storage_class() begin"
+    local storage_class=$1
+    if $KUBECTL get storageclass ${storage_class} >/dev/null 2>&1; then
+        log_verbose "storage class $storage_class exists in the edge cluster"
+    else
+        log_fatal 2 "$storage_class does not exist in the edge cluster"
+    fi
+    log_debug "check_cluster_storage_class() end"
+}
+
 # checks if OS/distribution/codename/arch is supported
 function check_support() {
     log_debug "check_support() begin"