One of my EC2 instance is disappeared.

Question

I couldn't access my instance with ssh anymore. Then I checked on EC2 dashboard, it's gone. Disappeared.

- There is no filter in the management console.
- I'm sure I'm checking the correct region
- Cloudtrail was disabled. So there is no log.

Accepted Answer

Hi Ste,

Since you have a spot-instance tagged, it might be the likely reason why your EC2 Instance disappeared unexpectedly,

Quoting AWS's documentation: (https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/how-spot-instances-work.html)
"Your Spot Instance runs until you stop or terminate it, or until Amazon EC2 interrupts it (known as a Spot Instance interruption)."

You can set up spot interruption handling steps, read more here: https://aws.amazon.com/blogs/compute/best-practices-for-handling-ec2-spot-instance-interruptions/

If your instance was not a spot instance, I highly recommend:
- Reviewing any ASG for policies that could have terminated unhealthy instances
- No AWS config rules with automated compliance actions ie stopping non-compliant resources

Hope I helped!
Cordially,
Brian

Answer

Hi,

EC2 instance can't disappear by itself. either they can be terminated or stopped.

You will find this answer helpful in your case https://repost.aws/questions/QUTF8xpuRFR-6DK5fhcT96Jg/one-of-my-ec2-instance-was-disappeared

Thanks,   
Abhishek

One of my EC2 instance is disappeared.

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