AWS EC2 status check failed

If you're frequently facing instance reachability issues with your AWS EC2 instances, there are several steps you can take to troubleshoot and potentially resolve the problem:

1. Check system resources: High CPU usage, memory consumption, or storage capacity issues can cause status check failures. Monitor these metrics to ensure your instance isn't overloaded.

2. Investigate network connectivity: Loss of network connectivity is a common cause of reachability issues. Verify your instance's network configuration and security group settings.

3. Examine system logs: Look for any error messages or unusual activity that might indicate the root cause of the problem.

4. Reboot the instance: While this is a temporary solution, rebooting the instance can often resolve the issue in the short term. However, if the problem persists, further investigation is needed.

5. Consider instance type compatibility: Ensure that your chosen instance type is compatible with your operating system and workload requirements.

6. Check for AWS system issues: Sometimes, the problem may be on AWS's end. Monitor the AWS Service Health Dashboard for any reported issues in your region.

7. Set up CloudWatch alarms: Create alarms to notify you when status checks fail, allowing for quicker response times.

8. Use Auto Scaling: Implement an Auto Scaling group to automatically replace impaired instances.

9. For EBS-backed instances: If the issue persists, you may want to stop and start the instance, which typically migrates it to a new host.

10. For persistent problems: If the issue continues despite these measures, contact AWS Support for further assistance.

Remember that the first boot of Windows machines might take up to 45 minutes due to adjustments to AWS virtual hardware, so be patient during initial launches.

By implementing these strategies, you should be able to reduce the frequency of instance reachability failures and improve the overall stability of your EC2 instances.

Sources
Mitigate EC2 Windows instance status check failure with MGN | AWS re:Post
Status checks for Amazon EC2 instances - Amazon Elastic Compute Cloud
Instance keeps on failing with status check - reachability issue | AWS re:Post

Hello.

What are the CPU usage, memory usage, storage capacity, etc. when the status check fails? The EC2 status check may fail depending on the load status of the instance, so you need to check to see if the load is high. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/monitoring-system-instance-status-check.html