mirror of https://github.com/lissy93/dashy
37 lines
1.4 KiB
JavaScript
37 lines
1.4 KiB
JavaScript
/**
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* An endpoint for confirming that the application is up and running
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* Used for better Docker healthcheck results
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* Note that exiting with code 1 indicates failure, and 0 is success
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*/
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const http = require('http');
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/* Location of the server to test */
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const port = process.env.PORT || !!process.env.IS_DOCKER ? 80 : 4000;
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const host = process.env.HOST || '0.0.0.0';
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const timeout = 2000;
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const requestOptions = { host, port, timeout };
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const startTime = new Date(); // Initialize timestamp to calculate time taken
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console.log(`[${startTime}] Running health check...`);
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/* Starts quick HTTP server, attempts to send GET to app, then exists with appropriate exit code */
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const healthCheck = http.request(requestOptions, (response) => {
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const totalTime = (new Date() - startTime) / 1000;
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const status = response.statusCode;
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const color = status === 200 ? '\x1b[32m' : '\x1b[31m';
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const message = `${color}Status: ${status}\nRequest took ${totalTime} seconds\n\x1b[0m---`;
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console.log(message); // Print out healthcheck response
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process.exit(status === 200 ? 0 : 1); // Exit with 0 (success), if response is 200 okay
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});
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/* If the server is not running, then print the error code, and exit with 1 */
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healthCheck.on('error', (err) => {
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console.error(`\x1b[31mHealthceck Failed, Error: ${'\x1b[33m'}${err.code}\x1b[0m`);
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process.exit(1);
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});
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healthCheck.end();
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