Monitor your Node.js app in a Docker container

In seconds, this tutorial will show you how to monitor a Node.js application with PM2 Plus inside a container.

We assume that your app has already been wrapped with PM2. If not, follow the PM2 Docker Tutorial.

Create an account

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Install the profiler

Add this to your Dockerfile to install the profiler:

RUN pm2 install profiler

Link your app with PM2 Plus

In order to connect PM2 to the dashboard, you need to add your public and private keys in the environment.

Create a .env file with:

PM2_SECRET_KEY=XXXXX
PM2_PUBLIC_KEY=YYYYY

and restart your container with docker runadding --env-file .env to load the environment variables.

Set the server name in PM2 Plus

Set the PM2_MACHINE_NAME environment variable to specify a server nam. Add this to the .env file:

PM2_SECRET_KEY=XXXXX
PM2_PUBLIC_KEY=YYYYY
PM2_MACHINE_NAME=docker-server

The default server name is the hostname (HOST environment variable) with a random string.

Be careful, in case of duplicate hostnames the dashboard will receive data from both instances and flicker.

Next Steps

Complete your dashboard configuration.