AWS EC2 User Data script isnt working as expected

user_13689608 0
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When I ssh into my EC2 Instance and run the following commands my SpringServer.jar file executes and I can access my Spring application by going to myawsaccount:8080/times. when I specify the following commands in User Data I cant access my application at myawsaccount:8080/times and im not sure why. Any help would be appreciated.

Commands

#!/bin/bash --> only in user script
    sudo su

wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u141-b15/336fa29ff2bb4ef291e347e091f7f4a7/jdk-8u141-linux-x64.rpm

yum install -y jdk-8u141-linux-x64.rpm

wget https://myawsaccount.s3-eu-west-1.amazonaws.com/SpringServer-1-0.0.1-SNAPSHOT.jar

java -jar SpringServer-1-0.0.1-SNAPSHOT.jar
amazon-web-services amazon-ec2 amazon-s3
2 Answers

To troubleshoot UserData issues, the best thing to do is to login to an instance, and inspect one of UserData log files.

Most impotently /var/log/cloud-init-output.log:

The cloud-init output log file (/var/log/cloud-init-output.log) captures console output so it is easy to debug your scripts following a launch if the instance does not behave the way you intended.

Also your UserData script will be located in /var/lib/cloud/instances/<instance-id>/. Thus, once you are in the instance you can manually try to run it and fix/debug while in the instance.

user_2488230

Setting environment variables using export doesn't work in user data as it only sets them for the current shell session. You can fix this by copying them to your profile configuration:

#!/bin/bash

...

echo 'export JAVA_HOME=/opt/jdk1.8.0_141' >> /etc/profile
echo 'export JRE_HOME=/opt/jdk1.8.0_141/jre' >> /etc/profile
echo 'export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin' >> /etc/profile

...

This way, the environment variables will be available in every session.

user_1586680
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