Instance reachability check failed after yum update

Hi Robbert,

Please try this solution it will be helpful for you and please look at AWS Document link you will get more information.

Step:1 Stop the instance from the EC2 console, detach the root volume, and attach it to another healthy instance.

Step:2 SSH into the healthy instance and mount the detached volume to inspect system logs located in **/mnt/temp/var/log/**for any errors.

Step:3 If you identify any problematic services, disable them using systemctl disable.

Step:4 If the issue is due to a kernel update, set the instance to boot from an older kernel by modifying the GRUB configuration After making the necessary changes detach the volume from the healthy instance and reattach it to the original instance.

Step:5 Finally start the original instance and check if the issue is resolved. If the problem persists, consider rolling back recent updates using yum history undo.

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

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/troubleshoot-unreachable-instance.html#instance-console-console-output

Hello.

Please check the OS system log etc. to see if there are any error messages.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/troubleshoot-unreachable-instance.html#instance-console-console-output

I think it is possible that some kind of system was damaged after the update was executed.
There are several reasons why the instance status check may fail, so please check if the following documents apply to you.
https://repost.aws/knowledge-center/ec2-linux-status-check-failure