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 ./
