Thursday, March 23, 2017

How to run arbitrary binary executables on AWS Lambda 6.10+

After posting the hack yesterday, AWS coincidentally released the Node.js 6.10 platform. The old method from 0.10 now works:

1. Create a bin/ directory inside your project directory.
2. Statically compile your binary as much as possible. Put it inside your bin/ directory. Put any shared libraries that it needs inside the bin/ directory too.
3. chmod +x bin/hello-world-binary
4. Do something like:

'use strict';

const exec = require('child_process').exec;

process.env['PATH'] = process.env['PATH'] + ':' + process.env['LAMBDA_TASK_ROOT'] + '/bin';
process.env['LD_LIBRARY_PATH'] = process.env['LAMBDA_TASK_ROOT'] + '/bin';

exports.handler = (event, context, callback) => {
    const cmd = 'hello-world-binary';
    const child = exec(cmd, (error) => {
        callback(error, 'Process complete!');

    child.stdout.on('data', console.log);
    child.stderr.on('data', console.error);

5. ZIP your project directory and upload to AWS Lambda. Enjoy!

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