server:
    Properties:
      AvailabilityZone: us-east-1e
      ImageId:
        Ref: Ami
      InstanceType:
        Ref: InstanceType
      KeyName:
        Ref: KeyName
      SecurityGroups:
      - global
      - Fn::Join:
        - "-"
        - - Ref: Environment
          - Ref: Application
      - Ref: ServiceSecurityGroup
      UserData:
        Fn::Base64: !Sub | # No more Fn::Join needed
          #!/bin/bash -lexv
          exec > >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1

          FIND_IN_MAP=!FindInMap [ MapName, TopLevelKey, SecondLevelKey ]
          HOSTNAME_PREFIX=!FindInMap [ EnvironmentMapping, HostnamePrefix, !Ref Environment ]
          BAR=!Ref DRINK ; MORE=!FindInMap [MapName, TopLevelKey, SecondLevelKey ]

          BASE64=!Base64 "value to encode"
          GET_ATT=!GetAtt server.PublicDnsName
          GET_AZS=!GetAZs us-east-1
          JOIN=!Join [ ":", [a, b, c]
          SELECT=!Select [ "1", [ a, b, c] ]

          VARTEST=<%= @vartest %>

          echo !Ref AWS::StackName > /tmp/stack_name
          # Helper function
          function error_exit
          {
            /usr/local/bin/cfn-signal -e 1 -r "$1" '!Ref WaitHandle'
            exit 1
          }
          # Wait for the EBS volume to show up
          while [ ! -e /dev/xvdf ]; do echo Waiting for EBS volume to attach; sleep 1; done
          /bin/mkdir /media/redis
          /sbin/mkfs -t ext4 /dev/xvdf
          echo "/dev/xvdf /media/redis auto defaults 0 0" >> /etc/fstab
          /bin/mount /media/redis
          /usr/bin/redis-cli shutdown
          sleep 10
          mv /var/lib/redis/* /media/redis/
          rm -r /var/lib/redis
          ln -s /media/redis /var/lib/redis
          chown -R redis:redis /var/lib/redis
          chown -R redis:redis /media/redis
          /usr/bin/redis-server
          # If all is well so signal success
          /usr/local/bin/cfn-signal -e $? -r "Ready to rock" '!Ref WaitHandle'
          cat /proc/uptime | cut -f1 -d'.' > /tmp/time-to-boot

    Type: AWS::EC2::Instance