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EC2 实例初始化时只进行了 1/2 次检查，因此无法登录我的 Linux 服务器

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EC2 实例初始化时只进行了 1/2 次检查，因此无法登录我的 Linux 服务器

大家好，

我们的 EC2 实例仅使用 “ 一半检查已通过 ”在我分离并重新连接我的卷之后（我这样做是为了一些特定的调试目的）。因此我无法登录我的 Linux 服务器现在（使用 putty .. 它显示网络错误）我有一些复杂的脚本，如果我们决定终止实例，我需要检索这些脚本。

我不太了解 EC2 编程，因为我们只将其用于 SAP HANA 云访问。我生成了该实例的系统日志，如下所示：

souvenir Xen Minimal OS!
  start_info: 0x9248000(VA)
    nr_pages: 0x1117000
  shared_inf: 0x7e68b000(MA)
     pt_base: 0x924b000(VA)
nr_pt_frames: 0x4d
    mfn_list: 0x990000(VA)
   mod_start: 0x0(VA)
     mod_len: 0
       flags: 0x0
    cmd_line: root=/dev/sda1 ro 4
  stack:      0x94f860-0x96f860
MM: Init
      _text: 0x0(VA)
     _etext: 0x6000d(VA)
   _erodata: 0x78000(VA)
     _edata: 0x80b00(VA)
stack start: 0x94f860(VA)
       _end: 0x98fe68(VA)
  start_pfn: 929b
    max_pfn: 1117000
Mapping memory range 0x9400000 - 0x1117000000
setting 0x0-0x78000 readonly
skipped 0x1000
MM: Initialise page allocator for 11b4d000(11b4d000)-1117000000(1117000000)
MM: done
Demand map pfns at 1117001000-3117001000.
Heap resides at 3117002000-5117002000.
Initialising timer interface
Initialising console ... done.
gnttab_table mapped at 0x1117001000.
Initialising scheduler
Thread "Idle": pointer: 0x3117002010, stack: 0x1113680000
Initialising xenbus
Thread "xenstore": pointer: 0x31170027c0, stack: 0x1113690000
Dummy main: start_info=0x96f960
Thread "main": pointer: 0x3117002f70, stack: 0x11136a0000
"main" "root=/dev/sda1" "ro" "4" 
vbd 2049 is hd0
******************* BLKFRONT for device/vbd/2049 **********


backend at /local/domain/0/backend/vbd/390/2049
Failed to read /local/domain/0/backend/vbd/390/2049/feature-barrier.
Failed to read /local/domain/0/backend/vbd/390/2049/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2144 is hd1
******************* BLKFRONT for device/vbd/2144 **********


backend at /local/domain/0/backend/vbd/390/2144
Failed to read /local/domain/0/backend/vbd/390/2144/feature-barrier.
Failed to read /local/domain/0/backend/vbd/390/2144/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2160 is hd2
******************* BLKFRONT for device/vbd/2160 **********


backend at /local/domain/0/backend/vbd/390/2160
Failed to read /local/domain/0/backend/vbd/390/2160/feature-barrier.
Failed to read /local/domain/0/backend/vbd/390/2160/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2176 is hd3
******************* BLKFRONT for device/vbd/2176 **********


backend at /local/domain/0/backend/vbd/390/2176
Failed to read /local/domain/0/backend/vbd/390/2176/feature-barrier.
Failed to read /local/domain/0/backend/vbd/390/2176/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2192 is hd4
******************* BLKFRONT for device/vbd/2192 **********


backend at /local/domain/0/backend/vbd/390/2192
Failed to read /local/domain/0/backend/vbd/390/2192/feature-barrier.
Failed to read /local/domain/0/backend/vbd/390/2192/feature-flush-cache.
20971520 sectors of 512 bytes
**************************
vbd 2208 is hd5
******************* BLKFRONT for device/vbd/2208 **********


backend at /local/domain/0/backend/vbd/390/2208
Failed to read /local/domain/0/backend/vbd/390/2208/feature-barrier.
Failed to read /local/domain/0/backend/vbd/390/2208/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2224 is hd6
******************* BLKFRONT for device/vbd/2224 **********


backend at /local/domain/0/backend/vbd/390/2224
Failed to read /local/domain/0/backend/vbd/390/2224/feature-barrier.
Failed to read /local/domain/0/backend/vbd/390/2224/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
[H[J

    GNU GRUB  version 0.97  (71680000K lower / 0K upper memory)



       [ Minimal BASH-like line editing is supported.   For

         the   first   word,  TAB  lists  possible  command

         completions.  Anywhere else TAB lists the possible

         completions of a device/filename. ]




grubdom>                                                                       [9;10HXen Minimal OS!
  start_info: 0x9248000(VA)
    nr_pages: 0x1117000
  shared_inf: 0x7e692000(MA)
     pt_base: 0x924b000(VA)
nr_pt_frames: 0x4d
    mfn_list: 0x990000(VA)
   mod_start: 0x0(VA)
     mod_len: 0
       flags: 0x0
    cmd_line: root=/dev/sda1 ro 4
  stack:      0x94f860-0x96f860
MM: Init
      _text: 0x0(VA)
     _etext: 0x6000d(VA)
   _erodata: 0x78000(VA)
     _edata: 0x80b00(VA)
stack start: 0x94f860(VA)
       _end: 0x98fe68(VA)
  start_pfn: 929b
    max_pfn: 1117000
Mapping memory range 0x9400000 - 0x1117000000
setting 0x0-0x78000 readonly
skipped 0x1000
MM: Initialise page allocator for 11b4d000(11b4d000)-1117000000(1117000000)
MM: done
Demand map pfns at 1117001000-3117001000.
Heap resides at 3117002000-5117002000.
Initialising timer interface
Initialising console ... done.
gnttab_table mapped at 0x1117001000.
Initialising scheduler
Thread "Idle": pointer: 0x3117002010, stack: 0x1113680000
Initialising xenbus
Thread "xenstore": pointer: 0x31170027c0, stack: 0x1113690000
Dummy main: start_info=0x96f960
Thread "main": pointer: 0x3117002f70, stack: 0x11136a0000
"main" "root=/dev/sda1" "ro" "4" 
vbd 2049 is hd0
******************* BLKFRONT for device/vbd/2049 **********


backend at /local/domain/0/backend/vbd/391/2049
Failed to read /local/domain/0/backend/vbd/391/2049/feature-barrier.
Failed to read /local/domain/0/backend/vbd/391/2049/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2144 is hd1
******************* BLKFRONT for device/vbd/2144 **********


backend at /local/domain/0/backend/vbd/391/2144
Failed to read /local/domain/0/backend/vbd/391/2144/feature-barrier.
Failed to read /local/domain/0/backend/vbd/391/2144/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2160 is hd2
******************* BLKFRONT for device/vbd/2160 **********


backend at /local/domain/0/backend/vbd/391/2160
Failed to read /local/domain/0/backend/vbd/391/2160/feature-barrier.
Failed to read /local/domain/0/backend/vbd/391/2160/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2176 is hd3
******************* BLKFRONT for device/vbd/2176 **********


backend at /local/domain/0/backend/vbd/391/2176
Failed to read /local/domain/0/backend/vbd/391/2176/feature-barrier.
Failed to read /local/domain/0/backend/vbd/391/2176/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2192 is hd4
******************* BLKFRONT for device/vbd/2192 **********


backend at /local/domain/0/backend/vbd/391/2192
Failed to read /local/domain/0/backend/vbd/391/2192/feature-barrier.
Failed to read /local/domain/0/backend/vbd/391/2192/feature-flush-cache.
20971520 sectors of 512 bytes
**************************
vbd 2208 is hd5
******************* BLKFRONT for device/vbd/2208 **********


backend at /local/domain/0/backend/vbd/391/2208
Failed to read /local/domain/0/backend/vbd/391/2208/feature-barrier.
Failed to read /local/domain/0/backend/vbd/391/2208/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
vbd 2224 is hd6
******************* BLKFRONT for device/vbd/2224 **********


backend at /local/domain/0/backend/vbd/391/2224
Failed to read /local/domain/0/backend/vbd/391/2224/feature-barrier.
Failed to read /local/domain/0/backend/vbd/391/2224/feature-flush-cache.
41943040 sectors of 512 bytes
**************************
[H[J

    GNU GRUB  version 0.97  (71680000K lower / 0K upper memory)



       [ Minimal BASH-like line editing is supported.   For

         the   first   word,  TAB  lists  possible  command

         completions.  Anywhere else TAB lists the possible

         completions of a device/filename. ]




grubdom>                                                                       [9;10H

希望各位专家能帮助我解决这个问题。

谢谢

答案1

我也遇到过这种情况——第二个健康检查是网络连接，在解决这个问题之前，SSH 是不会工作的（显然）。我建议

  1. 从 AWS 控制台或 AWS CLI 内部完全重启实例。
  2. 您可能还想分离实例的弹性 IP，等待几秒钟然后重新连接它。

您还可以在同一个可用区中启动一个新的 EC2 实例，从不健康的实例中分离卷，并将其作为辅助/第三卷安装在新实例中 - 要么检查它，要么获取您需要的脚本/文件。

抱歉，我无法提供更具体的建议，但我想知道您的 /local/ 分区是否已变得无法读取？

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