SYNC: health status

packages/api/src/controllers/auth.js

@@ -43,6 +43,7 @@ function authMiddleware(req, res, next) {
     '/connections/dblogin-app',
     '/connections/dblogin-auth',
     '/connections/dblogin-auth-token',
+    '/health',
   ];
 
   // console.log('********************* getAuthProvider()', getAuthProvider());

packages/api/src/controllers/runners.js

@@ -171,6 +171,7 @@ module.exports = {
       this.rejectRequest(runid, { message: 'No data returned, maybe input data source is too big' });
       logger.info({ code, pid: subprocess.pid }, 'Exited process');
       socket.emit(`runner-done-${runid}`, code);
+      this.opened = this.opened.filter(x => x.runid != runid);
     });
     subprocess.on('error', error => {
       // console.log('... ERROR subprocess', error);
@@ -180,6 +181,7 @@ module.exports = {
         severity: 'error',
         message: error.toString(),
       });
+      this.opened = this.opened.filter(x => x.runid != runid);
     });
     const newOpened = {
       runid,
@@ -224,6 +226,7 @@ module.exports = {
       if (onFinished) {
         onFinished();
       }
+      this.opened = this.opened.filter(x => x.runid != runid);
     });
     subprocess.on('spawn', () => {
       this.dispatchMessage(runid, `Started external process ${command}`);
@@ -241,6 +244,7 @@ module.exports = {
         });
       }
       socket.emit(`runner-done-${runid}`);
+      this.opened = this.opened.filter(x => x.runid != runid);
     });
 
     if (stdinFilePath) {

packages/api/src/controllers/sessions.js

@@ -127,6 +127,9 @@ module.exports = {
       this.dispatchMessage(sesid, 'Query session closed');
       socket.emit(`session-closed-${sesid}`);
     });
+    subprocess.on('error', () => {
+      this.opened = this.opened.filter(x => x.sesid != sesid);
+    });
 
     subprocess.send({
       msgtype: 'connect',

packages/api/src/main.js

@@ -38,6 +38,7 @@ const { getLogger } = require('dbgate-tools');
 const { getDefaultAuthProvider } = require('./auth/authProvider');
 const startCloudUpgradeTimer = require('./utility/cloudUpgrade');
 const { isProApp } = require('./utility/checkLicense');
+const getHealthStatus = require('./utility/healthStatus');
 
 const logger = getLogger('main');
 
@@ -117,6 +118,12 @@ function start() {
     });
   });
 
+  app.get(getExpressPath('/health'), async function (req, res) {
+    res.setHeader('Content-Type', 'application/json');
+    const health = await getHealthStatus();
+    res.end(JSON.stringify(health, null, 2));
+  });
+
   app.use(bodyParser.json({ limit: '50mb' }));
 
   app.use(

packages/api/src/utility/healthStatus.js

@@ -0,0 +1,25 @@
+const os = require('os');
+
+const databaseConnections = require('../controllers/databaseConnections');
+const serverConnections = require('../controllers/serverConnections');
+const sessions = require('../controllers/sessions');
+const runners = require('../controllers/runners');
+
+async function getHealthStatus() {
+  const memory = process.memoryUsage();
+
+  return {
+    status: 'ok',
+    databaseConnectionCount: databaseConnections.opened.length,
+    serverConnectionCount: serverConnections.opened.length,
+    sessionCount: sessions.opened.length,
+    memory,
+    systemMemory: {
+      total: os.totalmem(),
+      free: os.freemem(),
+    },
+    runProcessCount: runners.opened.length,
+  };
+}
+
+module.exports = getHealthStatus;