use NodeMetadata struct for writing metadata.json from neon_local

control_plane/src/pageserver.rs

@@ -248,12 +248,13 @@ impl PageServerNode {
         // situation: the metadata is written by some other script.
         std::fs::write(
             metadata_path,
-            serde_json::to_vec(&serde_json::json!({
-                "host": "localhost",
-                "port": self.pg_connection_config.port(),
-                "http_host": "localhost",
-                "http_port": http_port,
-            }))
+            serde_json::to_vec(&pageserver_api::config::NodeMetadata {
+                postgres_host: "localhost".to_string(),
+                postgres_port: self.pg_connection_config.port(),
+                http_host: "localhost".to_string(),
+                http_port,
+                other: HashMap::new(),
+            })
             .unwrap(),
         )
         .expect("Failed to write metadata file");

libs/pageserver_api/src/config.rs

@@ -12,7 +12,7 @@ pub const DEFAULT_HTTP_LISTEN_ADDR: &str = formatcp!("127.0.0.1:{DEFAULT_HTTP_LI
 // itself, it is only used for registering the pageserver with the control
 // plane and/or storage controller.
 //
-#[derive(serde::Deserialize)]
+#[derive(serde::Serialize, serde::Deserialize)]
 pub struct NodeMetadata {
     #[serde(rename = "host")]
     pub postgres_host: String,