Rados故障处理操作手册

rados命令操作指南

• 获取对象omap信息

  [root@ceph-1 ~]# rados -p pool listomapvals rbd_header.111c2ae8944a
  features
  value (8 bytes) :
  00000000  3d 00 00 00 00 00 00 00                           |=.......|
  00000008
  
  object_prefix
  value (25 bytes) :
  00000000  15 00 00 00 72 62 64 5f  64 61 74 61 2e 31 31 31  |....rbd_data.111|
  00000010  63 32 61 65 38 39 34 34  61                       |c2ae8944a|
  00000019
  
  order
  value (1 bytes) :
  00000000  16                                                |.|
  00000001
  
  size
  value (8 bytes) :
  00000000  00 00 40 00 00 00 00 00                           |..@.....|
  00000008
  
  snap_seq
  value (8 bytes) :
  00000000  0a 00 00 00 00 00 00 00                           |........|
  00000008
  
  snapshot_000000000000000a
  value (81 bytes) :
  00000000  04 01 4b 00 00 00 0a 00  00 00 00 00 00 00 04 00  |..K.............|
  00000010  00 00 73 6e 61 70 00 00  40 00 00 00 00 00 3d 00  |..snap..@.....=.|
  00000020  00 00 00 00 00 00 01 01  1c 00 00 00 ff ff ff ff  |................|
  00000030  ff ff ff ff 00 00 00 00  fe ff ff ff ff ff ff ff  |................|
  00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  00000050  00                                                |.|
  00000051

• 获取对象的快照信息，代表对象已经被覆盖写，产生了快照文件

  [root@ceph-1 ~]# rados -p pool listsnaps rbd_data.14a82ae8944a.0000000000000000
  rbd_data.14a82ae8944a.0000000000000000:
  cloneid    snaps    size    overlap
  5    5    4194304    []
  head    -    4194304

• 获取对象所在的卷，id_*代表pool id

  [root@ceph-1 ~]# rados -p pool listomapvals rbd_directory
  id_14a82ae8944a
  value (9 bytes) :
  00000000  05 00 00 00 74 65 73 74  31                       |....test1|
  00000009
  
  id_5f34238e1f29
  value (8 bytes) :
  00000000  04 00 00 00 74 65 73 74                           |....test|
  00000008
  
  name_test
  value (16 bytes) :
  00000000  0c 00 00 00 35 66 33 34  32 33 38 65 31 66 32 39  |....5f34238e1f29|
  00000010
  
  name_test1
  value (16 bytes) :
  00000000  0c 00 00 00 31 34 61 38  32 61 65 38 39 34 34 61  |....14a82ae8944a|
  00000010
  

• 获取ceph对象文件的的扩展属性，如果对象文件扩展属性丢失，这ceph不会识别对象文件，需要创建对象文件属性，查看文件属性需要安装attr， yum install attr -y

  [root@ceph-1 ~]# getfattr -d /var/lib/ceph/osd/ceph-0/current/4.31_head/rbd\\udata.5f34238e1f29.0000000000000000__head_594D79B1__4
  getfattr: Removing leading '/' from absolute path names
  # file: var/lib/ceph/osd/ceph-0/current/4.31_head/rbd\134udata.5f34238e1f29.0000000000000000__head_594D79B1__4
  user.ceph._=0sEAgfAQAABANHAAAAAAAAACYAAAByYmRfZGF0YS41ZjM0MjM4ZTFmMjkuMDAwMDAwMDAwMDAwMDAwMP7/////////sXlNWQAAAAAABAAAAAAAAAAGAxwAAAAEAAAAAAAAAP////8AAAAAAAAAAP//////////AAAAAF4AAAAAAAAAxAAAAF0AAAAAAAAAxAAAAAICFQAAAAj5FgAAAAAAABAAAAAAAAAAAAAAAAAAQAAAAAAAD4B7YuToTR8CAhUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABeAAAAAAAAAAAAAAAAAA==
  user.ceph._@1=0sAAAANAAAAA+Ae2IeUy4gjaIELv////8AAAAAAAAAAAAAAAAAAAAAAAAAAA==
  user.ceph.snapset=0sAgIxAAAABAAAAAAAAAABAQAAAAQAAAAAAAAAAAAAAAAAAAABAAAABAAAAAAAAAAAAAAAAAAAAA==
  user.cephos.spill_out=0sMAA=