EC2 instance launched from AMI not reachable(ssh) after start/stop or reboot
问题 When we launch an instance from an AMI. At first the instance is accessible(ssh). Once we stop/start the instance or reboot it the machine becomes inaccessible via ssh,we can ping it though. We see below error in System log. AMI ID used - ami-72dc9220 Instance - i-0896a15f - Linux rhel6.4 M1.large instance. ../ ******************* BLKFRONT for device/vbd/2049 ********** backend at /local/domain/0/backend/vbd/236/2049 Failed to read /local/domain/0/backend/vbd/236/2049/feature-barrier. Failed