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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.

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Install the profiler

Add this to your Dockerfile to install the profiler:

RUN pm2 install profiler

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.