Better support for overriding docker reg + tag (for local testing); init container for ensure-system-disk

src/api/cluster/system.rs

@@ -27,6 +27,7 @@ pub async fn ensure_system_disk(svc: &Services<'_>) -> Result<(), P5xError> {
     // Load the dynamic-kv
     let client = Client::try_default().await.map_err(P5xError::KubeError)?;
     let namespace = fs::read_to_string("/var/run/secrets/kubernetes.io/serviceaccount/namespace")
+        .or_else(|_| env::var("P5X_OVERRIDE_NS"))
         .unwrap_or_else(|_| "p5x-system".to_string());
 
     let maps: Api<ConfigMap> = Api::namespaced(client.clone(), &namespace);