EC2 Fundamentals - Automated Node.js Server Launch Custom User Data Script and Examples

example-userdata.sh

# If your given node application has a different start command, replace the line in the script...

# rest of the userdata.sh script above....
# Start the server
node . > stdout.log 2> stderr.log

# with...

# rest of the userdata.sh script above....
# Start the server
yourcommand > stdout.log 2> stderr.log

### FULL EXAMPLE BELOW
### IF YOU USE THE BELOW, DO NOT INCLUDE ANYTHING FROM LINE 12 and ABOVE!!
#!/usr/bin/env bash

# Install Node and Git
yum update -y
curl -sL https://rpm.nodesource.com/setup_10.x | bash -
yum install -y nodejs git

# Make a directory to clone the application code to
mkdir -p /home/ec2-user/app && cd /home/ec2-user/app
git clone https://github.com/jcolemorrison/ec2-lb-api.git .

# Install Dependencies
npm install

# Redirect Port 3000 to Port 80 Traffic
iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 3000

# Start the server
npm start > stdout.log 2> stderr.log