Lambda Canary

lambda-canary.js

var http = require('http');

exports.handler = function(event, context) {
    // return success before 5m
    console.log("setTimeout start");
    setTimeout(function(){
        console.log('setTimeout 290s finish');
        context.succeed('setTimeout 290s finish');
    }, 290000);

    // every 1 second request and record response
    setInterval(function() {
        var start = new Date();
        var req = http.request({
            hostname: 'httpd-1804309553.us-east-1.elb.amazonaws.com',
            method:   'GET',
            path:     '/',
            port:     80,
        }, function(res) {
            var body = '';
            console.log('Status:', res.statusCode);
            console.log('Headers:', JSON.stringify(res.headers));
            res.setEncoding('utf8');
            res.on('data', function(chunk) {
                body += chunk;
            });
            res.on('end', function() {
                console.log('Body:', body);
                console.log('Time:', new Date() - start, 'ms');
            });
        });

        req.on('error', function(e) {
            console.log('Error:', e);
        });

        req.on('timeout', function() { 
            console.log('Timeout');
            req.abort();
        });

        req.end();
    }, 1000);
};