EC2 instances status check for system or status check for instance automatically gets failed

Question

The EC2 instance has repeatedly failed health checks over the past month, causing it to become unresponsive and leading to downtime for the applications. This requires manual intervention to resolve. The issue is identified when the instance fails either the System Status Check or Instance Status Check in the AWS Console, making it inaccessible. We then manually stop and restart the instance to restore service, but the root cause of the failures remains unclear. The concern is to investigate why this is happening repeatedly and find a permanent solution.

In one of our instance system logs, it is giving me below error: failed: OSError(101, 'Network is unreachable').

In one of our instance system logs, it is giving me below error:
failed: OSError(101, 'Network is unreachable').

Adeleke Adebowale .J. · Answer

Could you follow this on how to troubleshoot this issue :-

https://repost.aws/knowledge-center/ec2-linux-system-status-check-failure

https://repost.aws/questions/QUlpGcxuuRRoim_Xxke40aew/ec2-instance-status-check-failed-and-server-stopped-working

Steven_D-N · Answer

The links posted previously are useful.  I would also recommend opening a case with AWS Support (EC2 - Linux).  The engineers should be able to dive deep and help you determine root cause.

Something to keep in mind - although this doesn't help with root case, I'd recommend taking a look at a few auto recovery options to minimize downtime in the future if this issue is encountered:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-recover.html

EC2 instances status check for system or status check for instance automatically gets failed

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