How to check whether my user data passing to EC2 instance working or not?

Question

While creating new AWS EC2 instance using the EC2 command line API, I am passing some user data to the new instance.

Now how I came to know whether that user data executed or not?

How should I check it?

Answer 1

Follow these steps to verify:

1. SSH on the launch EC2 instance

2. You can check the log of your user data script in these paths:

• /var/log/cloud-init.log and

• /var/log/cloud-init-output.log

Now, you can see all of your log’s of user data script. A /etc/cloud directory will also be created.