ec2 ubuntu would not completely start. "Instance reachability check failed"

Question

my t3.micro have been runing fine. Now I stopped and restarted today, it only passed one of 2 status check. Tried "reboot", and retried "stop and start", same issue. The system log indicates no error, and the last line is: "Ubuntu 22.04.1 LTS ip-172-30-1-84 ttyS0".

Answer

Since there are various causes for instance failures, please check the following document and take appropriate action for the error.

Check the status of the instance
https://docs.aws.amazon.com/ja_jp/AWSEC2/latest/UserGuide/monitoring-system-instance-status-check.html

Troubleshooting instances that failed status check
https://docs.aws.amazon.com/ja_jp/AWSEC2/latest/UserGuide/TroubleshootingInstances.html

ec2 ubuntu would not completely start. "Instance reachability check failed"

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