Installing CodeDeploy Agent on EC2 Instance via User Data

Question

I'm looking to install the CodeDeploy agent on an EC2 instance with User Data deployed through CloudFormation. Here is the script I'm using from AWS

However, when I place the script in the UserData property of my EC2 instance in CloudFormation, I get this error from the linter:

E1019 Parameter PLAT for Fn::Sub not found at Resources/Server/Properties/UserData/Fn::Base64/Fn::Sub

Here's the snippet:

UserData:
        'Fn::Base64': !Sub |
          #!/bin/bash -xe

          ## Code Deploy Agent Bootstrap Script##


          exec > >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1
          AUTOUPDATE=false

          function installdep(){

          if [ ${PLAT} = "ubuntu" ]; then

            apt-get -y update
            # Satisfying even ubuntu older versions.
            apt-get -y install jq awscli ruby2.0 || apt-get -y install jq awscli ruby



          elif [ ${PLAT} = "amz" ]; then
            yum -y update
            yum install -y aws-cli ruby jq

          fi

          }

          function platformize(){

          #Linux OS detection#
          if hash lsb_release; then
            echo "Ubuntu server OS detected"
            export PLAT="ubuntu"


          elif hash yum; then
            echo "Amazon Linux detected"
            export PLAT="amz"

          else
            echo "Unsupported release"
            exit 1

          fi
          }


          function execute(){

          if [ ${PLAT} = "ubuntu" ]; then

            cd /tmp/
            wget https://aws-codedeploy-${REGION}.s3.amazonaws.com/latest/install
            chmod +x ./install

            if ./install auto; then
              echo "Instalation completed"
                if ! ${AUTOUPDATE}; then
                      echo "Disabling Auto Update"
                      sed -i '/@reboot/d' /etc/cron.d/codedeploy-agent-update
                      chattr +i /etc/cron.d/codedeploy-agent-update
                      rm -f /tmp/install
                fi
              exit 0
            else
              echo "Instalation script failed, please investigate"
              rm -f /tmp/install
              exit 1
            fi

          elif [ ${PLAT} = "amz" ]; then

            cd /tmp/
            wget https://aws-codedeploy-${REGION}.s3.amazonaws.com/latest/install
            chmod +x ./install

              if ./install auto; then
                echo "Instalation completed"
                  if ! ${AUTOUPDATE}; then
                      echo "Disabling auto update"
                      sed -i '/@reboot/d' /etc/cron.d/codedeploy-agent-update
                      chattr +i /etc/cron.d/codedeploy-agent-update
                      rm -f /tmp/install
                  fi
                exit 0
              else
                echo "Instalation script failed, please investigate"
                rm -f /tmp/install
                exit 1
              fi

          else
            echo "Unsupported platform ''${PLAT}''"
          fi

          }

          platformize
          installdep
          REGION=$(curl -s 169.254.169.254/latest/dynamic/instance-identity/document | jq -r ".region")
          execute

What am I missing here? This script works fine in User Data when utilized creating an instance through the console. Thanks in advance!

Answer 1

Hat tip for @jordanm's comment. This resolved my issue.