6.12. OSD를 사전 생성된 LVM으로 교체

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1. Cephadm 쉘에 로그인합니다.

   예

   [root@host01 ~]# cephadm shell

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2. OSD를 제거합니다.

   구문

   ceph orch osd rm OSD_ID [--replace]

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   예

   [ceph: root@host01 /]# ceph orch osd rm 8 --replace
   Scheduled OSD(s) for removal

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3. OSD가 삭제되었는지 확인합니다.

   예

   [ceph: root@host01 /]# ceph osd tree
   
   ID   CLASS  WEIGHT   TYPE NAME        STATUS     REWEIGHT  PRI-AFF
    -1         0.32297  root default
    -9         0.05177      host host10
     3    hdd  0.01520          osd.3           up   1.00000  1.00000
    13    hdd  0.02489          osd.13          up   1.00000  1.00000
    17    hdd  0.01169          osd.17          up   1.00000  1.00000
   -13         0.05177      host host11
     2    hdd  0.01520          osd.2           up   1.00000  1.00000
    15    hdd  0.02489          osd.15          up   1.00000  1.00000
    19    hdd  0.01169          osd.19          up   1.00000  1.00000
    -7         0.05835      host host12
    20    hdd  0.01459          osd.20          up   1.00000  1.00000
    21    hdd  0.01459          osd.21          up   1.00000  1.00000
    22    hdd  0.01459          osd.22          up   1.00000  1.00000
    23    hdd  0.01459          osd.23          up   1.00000  1.00000
    -5         0.03827      host host04
     1    hdd  0.01169          osd.1           up   1.00000  1.00000
     6    hdd  0.01129          osd.6           up   1.00000  1.00000
     7    hdd  0.00749          osd.7           up   1.00000  1.00000
     9    hdd  0.00780          osd.9           up   1.00000  1.00000
    -3         0.03816      host host05
     0    hdd  0.01169          osd.0           up   1.00000  1.00000
     8    hdd  0.01129          osd.8    destroyed         0  1.00000
    12    hdd  0.00749          osd.12          up   1.00000  1.00000
    16    hdd  0.00769          osd.16          up   1.00000  1.00000
   -15         0.04237      host host06
     5    hdd  0.01239          osd.5           up   1.00000  1.00000
    10    hdd  0.01540          osd.10          up   1.00000  1.00000
    11    hdd  0.01459          osd.11          up   1.00000  1.00000
   -11         0.04227      host host07
     4    hdd  0.01239          osd.4           up   1.00000  1.00000
    14    hdd  0.01529          osd.14          up   1.00000  1.00000
    18    hdd  0.01459          osd.18          up   1.00000  1.00000

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4. zap 및 ceph-volume 명령을 사용하여 OSD를 제거합니다.

   구문

   ceph-volume lvm zap --osd-id OSD_ID

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   예

   [ceph: root@host01 /]# ceph-volume lvm zap --osd-id 8
   
   Zapping: /dev/vg1/data-lv2
   Closing encrypted path /dev/mapper/l4D6ql-Prji-IzH4-dfhF-xzuf-5ETl-jNRcXC
   Running command: /usr/sbin/cryptsetup remove /dev/mapper/l4D6ql-Prji-IzH4-dfhF-xzuf-5ETl-jNRcXC
   Running command: /usr/bin/dd if=/dev/zero of=/dev/vg1/data-lv2 bs=1M count=10 conv=fsync
    stderr: 10+0 records in
   10+0 records out
    stderr: 10485760 bytes (10 MB, 10 MiB) copied, 0.034742 s, 302 MB/s
   Zapping successful for OSD: 8

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5. OSD 토폴로지를 확인합니다.

   예

   [ceph: root@host01 /]# ceph-volume lvm list

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6. 특정 OSD 토폴로지에 해당하는 사양 파일을 사용하여 OSD를 다시 생성합니다.

   예

   [ceph: root@host01 /]# cat osd.yml
   service_type: osd
   service_id: osd_service
   placement:
     hosts:
     - host03
   data_devices:
     paths:
     - /dev/vg1/data-lv2
   db_devices:
     paths:
      - /dev/vg1/db-lv1

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7. 업데이트된 사양 파일을 적용합니다.

   예

   [ceph: root@host01 /]# ceph orch apply -i osd.yml
   Scheduled osd.osd_service update...

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8. OSD가 다시 있는지 확인합니다.

   예

   [ceph: root@host01 /]# ceph -s
   [ceph: root@host01 /]# ceph osd tree

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