当我们从AMI启动实例时.首先可以访问实例(ssh).一旦我们停止/启动实例或重新启动它,机器就会通过ssh无法访问,我们可以ping它.我们在系统日志中看到以下错误.
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 to read /local/domain/0/backend/vbd/236/2049/feature-flush-cache.
14680064 sectors of 512 bytes
**************************
Thread "kbdfront": pointer: 0x21e0130010, stack: 0x3720000
FBFRONT for device/vfb/0 **********
KBDFRONT for device/vkbd/0 **********
Failed to read device/vfb/0/backend-id.
Failed to read device/vkbd/0/backend-id.
Error ENOENT when reading the backend path device/vkbd/0/backend
Thread "kbdfront" exited.
Error ENOENT when reading the backend path device/vfb/0/backend
./