core: telemetry: add dbVersion

packages/hydrooj/src/service/monitor.ts

@@ -31,14 +31,7 @@ export async function feedback(): Promise<[string, StatusUpdate]> {
         document.coll.find({ docType: document.TYPE_DISCUSSION }).count(),
         record.coll.find().count(),
     ]);
-    let sandbox = '';
-    try {
-        let host = system.get('hydrojudge.sandbox_host') || 'http://localhost:5050/';
-        if (!host.endsWith('/')) host += '/';
-        const res = await superagent.get(`${host}version`);
-        sandbox = res.body;
-    } catch (e) { }
-    const payload = crypt(dump({
+    const info: Record<string, any> = {
         mid: mid.toString(),
         version,
         name,
@@ -52,8 +45,18 @@ export async function feedback(): Promise<[string, StatusUpdate]> {
         memory: inf.memory,
         osinfo: inf.osinfo,
         cpu: inf.cpu,
-        sandbox,
-    }, {
+    };
+    try {
+        let host = system.get('hydrojudge.sandbox_host') || 'http://localhost:5050/';
+        if (!host.endsWith('/')) host += '/';
+        const res = await superagent.get(`${host}version`);
+        info.sandbox = res.body;
+    } catch (e) { }
+    try {
+        const status = await db.db.admin().serverStatus();
+        info.dbVersion = status.version;
+    } catch (e) { }
+    const payload = crypt(dump(info, {
         replacer: (key, value) => {
             if (typeof value === 'function') return '';
             return value;