I searched a lot of topic about "user-data script is not working" in these few days, but until now, I haven't gotten any idea about my case yet, please help me to figure out what happened, thanks a lot!
According to AWS User-data explanation:
When you launch an instance in Amazon EC2, you have the option of passing user data to the instance that can be used to perform common automated configuration tasks and even run scripts after the instance starts.
So I tried to pass my own user-data when instance launch, this is my user-data:
echo 'test' > /home/ec2-user/user-script-output.txt
But there is no file in this path: /home/ec2-user/user-script-output.txt
I checked /var/lib/cloud/instance/user-data.txt, the file is exist and same as my user-data script.
Also I checked the log in /var/log/cloud-init.log, there is no error message.
But the user-data script is working if I launch an new instance with Amazon linux(2014.09.01), but I'm not sure what difference between my AMI (based on Amazon linux) and Amazon linux.
The only different part I saw is if I run this script:
sudo yum list installed | grep cloud-init
cloud-init.noarch 0.7.2-8.33.amzn1 @amzn-main
cloud-init.noarch 0.7.2-8.33.amzn1 installed
I'm not sure this is the reason?
If you need more information, I'm glad to provide, please let me know what happened in my own AMI and how to fix it?