Graceful Shutdown with Process Signals

Snippet

Graceful Shutdown with Process Signals

Handling termination signals like SIGTERM allows your application to stop accepting new requests and close existing connections or database handles before the process exits.

snippet.js
javascript
const http = require('node:http');
const server = http.createServer((req, res) => res.end('OK')).listen(3000);
 
process.on('SIGTERM', () => {
  console.log('SIGTERM received. Closing server...');
  server.close(() => {
    console.log('Server closed. Exiting process.');
    process.exit(0);
  });
});

nodejs

Breakdown

process.on('SIGTERM', ...)

Registers a listener for the termination signal often sent by container orchestrators like Docker or Kubernetes.

server.close(() => { ... })

Stops the server from accepting new connections and waits for existing ones to finish before executing the callback.

Previous snippet Next snippet

More Intermediate JavaScript exercises →

From your library

Graceful Shutdown with Process Signals

Related