Created
October 4, 2017 07:19
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Signal handling for node Express apps in Docker
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const PORT = process.env.PORT || 8081 | |
const HOST = process.env.HOST || 'localhost' | |
const app = express() | |
const server = app.listen(PORT, err => { | |
if (err) { | |
console.error(err) | |
process.exit(1) | |
} | |
console.log(`Listening at http://${HOST}:${PORT}`) | |
}) | |
const handleSignal = (signal, message) => { | |
process.on(signal, () => { | |
console.info(message) | |
server.close(err => { | |
if (err) { | |
console.error(err) | |
process.exit(1) | |
} | |
process.exit() | |
}) | |
}) | |
} | |
handleSignal('SIGINT', 'Received Ctrl-C, shutting down gracefully...') | |
handleSignal('SIGTERM', 'Container is stopping, shutting down gracefully...') |
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