Not able to run script in EC2 AMI instance

Question

Hi, I am new in aws cloud please some can help with this script.

UserData:
Fn::Base64: |
#!/bin/bash
sudo su
yum update -y
yum install httpd -y
service httpd start
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.34.0/install.sh | bash
export NVM_DIR="$HOME/.nvm"
&& \. "$NVM_DIR/nvm.sh" # This loads nvm
&& \. "$NVM_DIR/bash_completion"
. /.nvm/nvm.sh
nvm ls-remote
nvm install v12.7.0
nvm use v12.7.0
node -e "console.log('Running Node.js ' + process.version)"
curl -o- -L https://yarnpkg.com/install.sh | bash
export PATH="$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
Tags:

when I am running vai ssh one by one script then is working fine but when I am using user data script then it's not working. I think 
. /.nvm/nvm.sh not working

Answer 1

To allow run the 'aws s3 sync' command from the UserData section, you will 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