feat(info): display minimum Kubernetes job user ID (#181)

Render the new `kubernetes_min_user_uid` field from the `/info` endpoint
so that users can verify the cluster-configured minimum runtime
container user ID accepted in `kubernetes_uid` workflow hints.

Closes reanahub/reana#951

Author: tiborsimko

client/operations/info_responses.go

@@ -180,6 +180,13 @@ func (o *infoOptions) run(cmd *cobra.Command) error {
 		if p.KubernetesMaxMemoryRequest != nil {
 			displayInfoStringItem(cmd, p.KubernetesMaxMemoryRequest.Title, p.KubernetesMaxMemoryRequest.Value)
 		}
+		if p.KubernetesMinUserUID != nil {
+			cmd.Printf(
+				"%s: %d\n",
+				p.KubernetesMinUserUID.Title,
+				p.KubernetesMinUserUID.Value,
+			)
+		}
 		if p.MaximumInteractiveSessionInactivityPeriod != nil {
 			displayInfoStringItem(cmd, p.MaximumInteractiveSessionInactivityPeriod.Title, p.MaximumInteractiveSessionInactivityPeriod.Value)
 		}

cmd/info.go

@@ -49,6 +49,7 @@ func TestInfo(t *testing.T) {
 				"Maximum allowed memory request for Kubernetes jobs: 5Gi",
 				"Default memory limit for Kubernetes jobs: 3Gi",
 				"Maximum allowed memory limit for Kubernetes jobs: 10Gi",
+				"Minimum allowed user runtime container UID for Kubernetes jobs: 100",
 				"Maximum inactivity period in days before automatic closure of interactive sessions: 7",
 				"Maximum timeout for Kubernetes jobs: 500",
 				"Maximum retention period in days for workspace files: 250",

cmd/info_test.go

@@ -55,6 +55,10 @@
     "title": "Maximum timeout for Kubernetes jobs",
     "value": "500"
   },
+  "kubernetes_min_user_uid": {
+    "title": "Minimum allowed user runtime container UID for Kubernetes jobs",
+    "value": 100
+  },
   "maximum_workspace_retention_period": {
     "title": "Maximum retention period in days for workspace files",
     "value": "250"