keymetrics/pm2-docker-alpine

Node.js lightweight Docker image including the PM2 runtime for production applications.

This Docker image in association with PM2, increase application uptime, increase performance (spawn multiple processes and load-balance network query without any code change) and allow graceful state change, adapted to production environment.

Usage

$ docker pull keymetrics/pm2-docker-alpine

Versions available:

• keymetrics/pm2-docker-alpine:latest with Node.js 6
• keymetrics/pm2-docker-alpine:4 with Node.js 4
• keymetrics/pm2-docker-alpine:0.12 with Node.js 0.12

These images are automatically built from the Docker hub based on this Github repository branch arrangement.

Hub link

Running the container

Make sure you declared a process file called process.yml, this file will be started by PM2.

# Get example app
$ git clone https://github.com/keymetrics/pm2-docker-alpine
# Run example app, mounted as a volume
$ docker run -p 80:3000 -v `pwd`/example_app:/app keymetrics/pm2-docker-alpine

For Keymetrics linking you can set the extra env variables:

-e "KEYMETRICS_SECRET=YYY
-e "KEYMETRICS_PUBLIC=XXX"
-e "INSTANCE_NAME=hostname"

Log output

Append to pm2-docker CMD directive:

• --json to output logs in JSON
• --format to output logs in key=val style
• --raw to display logs in raw format

Actions

Monitoring CPU/Usage of each process

$ docker exec -it <container_id> pm2 monit

Listing managed processes

$ docker exec -it <container_id> pm2 list

Get more information about a process

$ docker exec -it <container_id> pm2 show <app_name>

0sec downtime reload all applications

$ docker exec -it <container_id> pm2 reload all

Automatically synchronize your application with git

Add into your Dockerfile:

RUN pm2 install pm2-auto-pull

Or try it:

$ docker exec -it <container_id> pm2 install pm2-auto-pull

Make sure the .git is present in your application source folder.

License

MIT