EC2 User data script for node js using NVM

Hi, here you go..
Note: To allow run the 'aws s3 sync' command from the UserData section, you will also need to

1. Create an IAM policy to enable reading of objects from the S3 bucket
2. Create a Role to enable the EC2 instance to access the s3 bucket
3. Add the Role to the EC2 instance on Launch creation time
   Steps on how to do this are available at the following Link: https://optimalbi.com/blog/2016/07/12/aws-tips-and-tricks-moving-files-from-s3-to-ec2-instance/

#!/bin/bash
yum update -y
yum install httpd -y
service httpd start
chkconfig httpd on
cat > /tmp/subscript.sh << EOF
# START
echo "Setting up NodeJS Environment"
curl https://raw.githubusercontent.com/nvm-sh/nvm/v0.34.0/install.sh | bash

echo 'export NVM_DIR="/home/ec2-user/.nvm"' >> /home/ec2-usr/.bashrc
echo '[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"  # This loads nvm' >> /home/ec2-user/.bashrc

# Dot source the files to ensure that variables are available within the current shell
. /home/ec2-user/.nvm/nvm.sh
. /home/ec2-user/.bashrc

# Install NVM, NPM, Node.JS & Grunt
nvm alias default v12.7.0
nvm install v12.7.0
nvm use v12.7.0

curl -o- -L https://yarnpkg.com/install.sh | bash
export PATH="$HOME/.yarn/bin:$HOME/.config/yarn/global/node_modules/.bin:$PATH" 
aws s3 sync s3://reactsearch /var/www/
cd /var/www/
yarn install
yarn run build
EOF

chown ec2-user:ec2-user /tmp/subscript.sh && chmod a+x /tmp/subscript.sh
sleep 1; su - ec2-user -c "/tmp/subscript.sh"

Hope that helps.
-randy

HI rtakeshi, thank you for your reply and this working fine. now but could help me on if i want to write like a step in CNF.

configure_cfn:
 files:
            /tmp/subscript.sh:
              content: !Sub |
                  echo "Setting up NodeJS Environment"
                  curl https://raw.githubusercontent.com/nvm-sh/nvm/v0.34.0/install.sh | bash
                  
                  echo 'export NVM_DIR="/home/ec2-user/.nvm"' >> /home/ec2-usr/.bashrc
                  echo '[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"  # This loads nvm' >> /home/ec2-user/.bashrc
                  
                  # Dot source the files to ensure that variables are available within the current shell
                  . /home/ec2-user/.nvm/nvm.sh
                  . /home/ec2-user/.bashrc
                  
                  # Install NVM, NPM, Node.JS & Grunt
                  nvm alias default v12.7.0
                  nvm install v12.7.0
                  nvm use v12.7.0
                  
                  curl -o- -L https://yarnpkg.com/install.sh | bash
                  export PATH="$HOME/.yarn/bin:$HOME/.config/yarn/global/node_modules/.bin:$PATH" 
              mode: "777"
              owner: root
              group: root
        install_node:
          commands:
            01_config:
              cwd: "/tmp/"
              test: "test ! -e subscript.sh"  
              command:  sleep 1; ./subscript.sh 

HERE THIS SCRIPT IS NOT WORKING.
Please can guide where i am doing wrong here.

Hi,
This appears to work in my environment:

---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'A simple template intended to be run in N.Virginia (us-east-1) with a Linux (1) distro. Feel free to change the ami so that you can run this in a different Region'
Parameters: 
  KeyName:
    Description: Name of an existing EC2 KeyPair to enable SSH access to the instance
    Type: AWS::EC2::KeyPair::KeyName
    ConstraintDescription: must be the name of an existing EC2 KeyPair.

Resources:
  SSHSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: Enable SSH access via port 22
      SecurityGroupIngress:
      - CidrIp: 0.0.0.0/0
        FromPort: 22
        IpProtocol: tcp
        ToPort: 22
      - CidrIp: 0.0.0.0/0
        FromPort: 80
        IpProtocol: tcp
        ToPort: 80


  EC2:
    Type: AWS::EC2::Instance
    Metadata:
      AWS::CloudFormation::Init:
        config: 
          commands:
            a_download:
              command: "wget https://reactsearch-scripts.s3.amazonaws.com/myscript.sh"
              cwd: "/home/ec2-user"
            b_setup:
              command: "chown ec2-user:ec2-user myscript.sh && chmod a+x myscript.sh"
              cwd: "/home/ec2-user"
            c_run:
              command: "su - ec2-user -c /home/ec2-user/myscript.sh"
              cwd: "/home/ec2-user"
            d_run_sync:
              command: "aws s3 sync s3://reactsearch /var/www/"
            e_yarn_install:
              command: "su - ec2-user -c yarn install"
              cwd: "/var/www"
            f_yarn_run:
              command: "su - ec2-user -c \"yarn run build\""
              cwd: "/var/www"
    Properties:
      ImageId: ami-0b898040803850657
      InstanceType: t2.micro
      KeyName: !Ref KeyName
      SecurityGroups:
      - !Ref SSHSecurityGroup
      UserData:
        Fn::Base64:
          !Join [ "", [
            "#!/bin/bash -xe\n",
            "sudo yum update -y\n",
            "sudo yum install httpd -y\n",
            "sudo service httpd start\n",
            "sudo chkconfig httpd on\n",            
            "sudo yum install -y aws-cfn-bootstrap\n", #download aws helper scripts
            "sudo /opt/aws/bin/cfn-init -v ", #use cfn-init to install packages in cloudformation init
            !Sub "--stack ${AWS::StackName} ",
            "--resource EC2 ",
            !Sub "--region ${AWS::Region} ",
            "\n" ] ]
      IamInstanceProfile:
        !Ref RootInstanceProfile
            
  RootRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
        - Effect: Allow
          Principal:
            Service:
            - ec2.amazonaws.com
          Action:
          - sts:AssumeRole
      Path: "/"
  RolePolicies:
    Type: AWS::IAM::Policy
    Properties:
      PolicyName: root
      PolicyDocument:
        Version: '2012-10-17'
        Statement:
        - Effect: Allow
          Action:
            - "s3:ListAllMyBuckets"
            - "s3:GetObjects"
            - "s3:ListBucket"
          Resource: 
            - "arn:aws:s3:::reactsearch-scripts"
            - "arn:aws:s3:::reactsearch-scripts/*"
      Roles:
      - !Ref RootRole
  RootInstanceProfile:
    Type: AWS::IAM::InstanceProfile
    Properties:
      Path: "/"
      Roles:
      - !Ref RootRole

I am storing the main myscript.sh script in an s3 bucket called, for example, "reactsearch-scripts"

myscript.sh:

#!/bin/bash
echo "Setting up NodeJS Environment"
curl https://raw.githubusercontent.com/nvm-sh/nvm/v0.34.0/install.sh | bash

echo 'export NVM_DIR="/home/ec2-user/.nvm"' >> /home/ec2-user/.bashrc
echo '[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"  # This loads nvm' >> /home/ec2-user/.bashrc

# Dot source the files to ensure that variables are available within the current shell
. /home/ec2-user/.nvm/nvm.sh
. /home/ec2-user/.bashrc

# Install NVM, NPM, Node.JS & Grunt
nvm alias default v12.7.0
nvm install v12.7.0
nvm use v12.7.0

curl -o- -L https://yarnpkg.com/install.sh | bash
export PATH="$HOME/.yarn/bin:$HOME/.config/yarn/global/node_modules/.bin:$PATH"

Hope this helps...
-randy