EC2 Troubleshooting Commands

Troubleshoot

To view the status of all instances, use the following command:

aws ec2 describe-instance-status
To get the status of all instances with a instance status of impaired:

aws ec2 describe-instance-status --filters Name=instance-status.status,Values=impaired
To get the status of a single instance, use the following command:

aws ec2 describe-instance-status --instance-ids i-1234567890abcdef0


System Status Check
The following are examples of problems that can cause system status checks to fail:

Loss of network connectivity

Loss of system power

Software issues on the physical host

Hardware issues on the physical host that impact network reachability


Instance Status Check
The following are examples of problems that can cause system status checks to fail:

Loss of network connectivity

Loss of system power

Software issues on the physical host

Hardware issues on the physical host that impact network reachability


Instance Metrics
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/viewing_metrics_with_cloudwatch.html

CloudWatch Monitoring Scripts
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/mon-scripts.html


Ec2-Rescue 
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Linux-Server-EC2Rescue.html

TroubleShoot Link
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/TroubleshootingInstances.html