Containerized

• Detect whether your Node.js process runs inside a Docker container or not
• Detection is based on existence of Docker-specific cgroups
• Well tested (aiming at 100% line, function, statement and branch coverage)
• Works with all Node.js versions >= 0.10.x.
• Tested in 0.10.x, 4.x, 5.x, 6.x.

Usage

npm install containerized

Node.js versions 0.12, 4.x, 5.x, 6.x, ...

var containerized = require('containerized');
 
if (containerized()) {
    console.log('I am running inside a Docker container.');
} else {
    console.log('I am NOT running inside a Docker container.');
}

In Node.js 0.10.x

Up until node 0.10.x, containerized offers only async way of fetching whether the process is containerized in a container or not.

var containerized = require('containerized');
 
containerized(function(err, result) {
    if (result === true) {
        console.log('I am running inside a Docker container.');
    } else {
        console.log('I am NOT running inside a Docker container.');
    }
});

For synchronous interface in Node <= 0.10, wrap it in deasync module:

var deasync = require('deasync');
var containerized = deasync(require('containerized'));
 
// then you can:
if (containerized()) {
    console.log('I am running inside a Docker container.');
}

Licence

MIT.

Contribute?

You're welcome! Make sure you keep an eye on the tests.