root ディスク拡張 & 追加データボリューム & Block storage のシステムリストア例¶

はじめに¶

rootディスク拡張 & 追加データボリューム & Block strorage 構成のシステムリストア検証結果、手順を記載します。
今回の検証構成

システムリストア元構成				システムリストア先構成
ブロックデバイス	mount	備考		ブロックデバイス	mount	備考
vda	/boot	500MB	⇒	vda	/mnt/boot	500MB
	/	残り全て			/mnt	残り全て
	/var	50GB			/mnt/var	50GB
	swap	8GB			swap	8GB
vdb	/var/log1	additional disk(15GB)		vdb		temporary os
				vdc	/mnt/var/log1	additional disk(15GB)
sda sdb	/var/log2	src 側iscsi		sda sdb	/mnt/var/log2	dest側iscsi

事前準備¶

バックアップ元vmの構築¶

OSイメージ: RedHatEnterpriseLinux-7.3_64_include-license_virtual-server_12
root disk: ディスクを100GBとしたいので、イメージ直接起動ではなく100GBボリュームにイメージをマウントし、ブータブルボリュームを作成します。
追加データボリューム: 15GB空ディスク
Block Storage: 100GB

手順¶

現状の構成と空き領域を確認します。(100GBボリュームでオフィシャルテンプレートを起動しても、40GBまでしか領域がない)

[root@test ~]# parted /dev/vda
  GNU Parted 3.1
  Using /dev/vda
  Welcome to GNU Parted! Type 'help' to view a list of commands.
  (parted) unit MB
  (parted) print
  Model: Virtio Block Device (virtblk)
  Disk /dev/vda: 107374MB
  Sector size (logical/physical): 512B/512B
  Partition Table: msdos
  Disk Flags:

  Number  Start   End      Size     Type     File system  Flags
   1      1.05MB  525MB    524MB    primary  ext4         boot
   2      525MB   42950MB  42424MB  primary               lvm

  (parted) print free
  Model: Virtio Block Device (virtblk)
  Disk /dev/vda: 107374MB
  Sector size (logical/physical): 512B/512B
  Partition Table: msdos
  Disk Flags:

  Number  Start    End       Size     Type     File system  Flags
          0.03MB   1.05MB    1.02MB            Free Space
   1      1.05MB   525MB     524MB    primary  ext4         boot
   2      525MB    42950MB   42424MB  primary               lvm
          42950MB  107374MB  64425MB           Free Space

  (parted)

#2のパーティションを削除して、free space を使って、パーティションを切りなおします。

(parted) rm 2
Error: Partition(s) 2 on /dev/vda have been written, but we have been unable to inform the kernel of the change, probably because
it/they are in use.  As a result, the old partition(s) will remain in use.  You should reboot now before making further changes.
Ignore/Cancel? Ignore
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End    Size   Type     File system  Flags
 1      1.05MB  525MB  524MB  primary  ext4         boot

(parted) print free
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End       Size      Type     File system  Flags
        0.03MB  1.05MB    1.02MB             Free Space
 1      1.05MB  525MB     524MB     primary  ext4         boot
        525MB   107374MB  106849MB           Free Space

(parted) mkpart primary 525 107374
Error: Partition(s) 2 on /dev/vda have been written, but we have been unable to inform the kernel of the change, probably because
it/they are in use.  As a result, the old partition(s) will remain in use.  You should reboot now before making further changes.
Ignore/Cancel? Ignore
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End       Size      Type     File system  Flags
 1      1.05MB  525MB     524MB     primary  ext4         boot
 2      525MB   107374MB  106849MB  primary

作成したパーティションにて lvm フラグをONにします。

(parted) set 2 lvm on
Error: Partition(s) 2 on /dev/vda have been written, but we have been unable to inform the kernel of the change, probably because
it/they are in use.  As a result, the old partition(s) will remain in use.  You should reboot now before making further changes.
Ignore/Cancel? Ignore
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End       Size      Type     File system  Flags
 1      1.05MB  525MB     524MB     primary  ext4         boot
 2      525MB   107374MB  106849MB  primary               lvm

(parted)

pvscan でlvmのサイズ確認。この時点ではまだ拡張前のサイズが表示されます。

[root@test ~]# pvscan
  PV /dev/vda2   VG rhel            lvm2 [39.51 GiB / 0    free]
  Total: 1 [39.51 GiB] / in use: 1 [39.51 GiB] / in no VG: 0 [0   ]

pvresize および OS再起動しlvmのサイズ拡張します。

[root@test ~]# pvresize /dev/vda2
  Physical volume "/dev/vda2" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized
[root@test ~]# reboot

reboot完了後、拡張後サイズ確認します。

[root@test ~]# pvscan
  PV /dev/vda2   VG rhel            lvm2 [99.51 GiB / 60.00 GiB free]
  Total: 1 [99.51 GiB] / in use: 1 [99.51 GiB] / in no VG: 0 [0   ]

論理ボリュームを拡張します。(/var は50GB、 / は残りすべて)

[root@test ~]# lvextend -L50G /dev/mapper/rhel-var
  Size of logical volume rhel/var changed from 10.00 GiB (2560 extents) to 50.00 GiB (12800 extents).
  Logical volume rhel/var successfully resized.
[root@test ~]# lvextend -l +100%FREE /dev/mapper/rhel-root
  Size of logical volume rhel/root changed from 21.51 GiB (5506 extents) to 41.51 GiB (10626 extents).
  Logical volume rhel/root successfully resized.
[root@test ~]# display -C
  LV   VG   Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root rhel -wi-ao---- 41.51g
  swap rhel -wi-ao----  8.00g
  var  rhel -wi-ao---- 50.00g

ファイルシステムを確認し拡張します。

[root@test ~]# df -T
Filesystem            Type     1K-blocks    Used Available Use% Mounted on
/dev/mapper/rhel-root ext4      22067024 1051120  19871892   6% /
devtmpfs              devtmpfs   1947132       0   1947132   0% /dev
tmpfs                 tmpfs      1957928       0   1957928   0% /dev/shm
tmpfs                 tmpfs      1957928    8528   1949400   1% /run
tmpfs                 tmpfs      1957928       0   1957928   0% /sys/fs/cgroup
/dev/mapper/rhel-var  ext4      10190100   83832   9565596   1% /var
/dev/vda1             ext4        487634  109629    348309  24% /boot
tmpfs                 tmpfs       391588       0    391588   0% /run/user/0
[root@test ~]# resize2fs /dev/mapper/rhel-var
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/mapper/rhel-var is mounted on /var; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 7
The filesystem on /dev/mapper/rhel-var is now 13107200 blocks long.

[root@test ~]# resize2fs /dev/mapper/rhel-root
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/mapper/rhel-root is mounted on /; on-line resizing required
old_desc_blocks = 3, new_desc_blocks = 6
The filesystem on /dev/mapper/rhel-root is now 10881024 blocks long.

[root@test ~]# df -h
Filesystem             Size  Used Avail Use% Mounted on
/dev/mapper/rhel-root   41G  1.1G   38G   3% /
devtmpfs               1.9G     0  1.9G   0% /dev
tmpfs                  1.9G     0  1.9G   0% /dev/shm
tmpfs                  1.9G  8.4M  1.9G   1% /run
tmpfs                  1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/mapper/rhel-var    50G   98M   47G   1% /var
/dev/vda1              477M  108M  341M  24% /boot
tmpfs                  383M     0  383M   0% /run/user/0

データディスク15GB(/dev/vdb)をアタッチしてマウントします。

[root@test ~]# df -h
Filesystem             Size  Used Avail Use% Mounted on
/dev/mapper/rhel-root   41G  1.1G   38G   3% /
devtmpfs               1.9G     0  1.9G   0% /dev
tmpfs                  1.9G     0  1.9G   0% /dev/shm
tmpfs                  1.9G  8.4M  1.9G   1% /run
tmpfs                  1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/mapper/rhel-var    50G   99M   47G   1% /var
/dev/vda1              477M  108M  341M  24% /boot
tmpfs                  383M     0  383M   0% /run/user/0
[root@test ~]# fdisk -l

Disk /dev/vda: 107.4 GB, 107374182400 bytes, 209715200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000d7819

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *        2048     1026047      512000   83  Linux
/dev/vda2         1026048   209715199   104344576   8e  Linux LVM

Disk /dev/mapper/rhel-var: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/rhel-root: 44.6 GB, 44568674304 bytes, 87048192 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/rhel-swap: 8589 MB, 8589934592 bytes, 16777216 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/vdb: 16.1 GB, 16106127360 bytes, 31457280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

[root@test ~]# /sbin/mkfs.ext4 /dev/vdb
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
983040 inodes, 3932160 blocks
196608 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2151677952
120 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

[root@test ~]# blkid
/dev/vda1: UUID="(root diskのUUIDを表示)" TYPE="ext4"
/dev/vda2: UUID="(root diskのUUIDを表示)" TYPE="LVM2_member"
/dev/mapper/rhel-var: UUID="(lvmのUUIDを表示)" TYPE="ext4"
/dev/mapper/rhel-root: UUID="(lvmのUUIDを表示)" TYPE="ext4"
/dev/mapper/rhel-swap: UUID="(lvmのUUIDを表示)" TYPE="swap"
/dev/vdb: UUID="(追加ボリュームのUUID)" TYPE="ext4"
[root@test ~]# mkdir /var/log1
[root@test ~]# mount -t ext4 UUID="(追加ボリュームのUUIDを表示)" /var/log1
[root@test ~]# df -h
Filesystem             Size  Used Avail Use% Mounted on
/dev/mapper/rhel-root   41G  1.1G   38G   3% /
devtmpfs               1.9G     0  1.9G   0% /dev
tmpfs                  1.9G     0  1.9G   0% /dev/shm
tmpfs                  1.9G  8.4M  1.9G   1% /run
tmpfs                  1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/mapper/rhel-var    50G   99M   47G   1% /var
/dev/vda1              477M  108M  341M  24% /boot
tmpfs                  383M     0  383M   0% /run/user/0
/dev/vdb                15G   41M   14G   1% /var/log1

同様にブロックストレージをアタッチしてマウントする。ブロックストレージのチュートリアルに従って、multipath の設定まで実施しておきます。

[root@test ~]# fdisk -l

Disk /dev/vda: 107.4 GB, 107374182400 bytes, 209715200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000d7819

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *        2048     1026047      512000   83  Linux
/dev/vda2         1026048   209715199   104344576   8e  Linux LVM

Disk /dev/vdb: 16.1 GB, 16106127360 bytes, 31457280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/rhel-var: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/rhel-root: 44.6 GB, 44568674304 bytes, 87048192 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/rhel-swap: 8589 MB, 8589934592 bytes, 16777216 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sdb: 107.4 GB, 107389255680 bytes, 209744640 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 4096 bytes / 65536 bytes


Disk /dev/sda: 107.4 GB, 107389255680 bytes, 209744640 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 4096 bytes / 65536 bytes


Disk /dev/mapper/(ブロックストレージUUID): 107.4 GB, 107389255680 bytes, 209744640 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 4096 bytes / 65536 bytes

[root@test ~]# mkfs.ext4 /dev/mapper/(ブロックストレージUUID)
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=16 blocks
6561792 inodes, 26218080 blocks
1310904 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2174746624
801 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872

Allocating group tables:   0/801       done
Writing inode tables:   0/801       done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information:   0/801       done

[root@test ~]# mkdir /var/log2
[root@test ~]# blkid
/dev/vda1: UUID="(root diskのUUIDを表示)" TYPE="ext4"
/dev/vda2: UUID="(root diskのUUIDを表示)" TYPE="LVM2_member"
/dev/mapper/rhel-var: UUID="(lvmのUUIDを表示)" TYPE="ext4"
/dev/vdb: UUID="(追加ボリュームのUUID)" TYPE="ext4"
/dev/mapper/rhel-root: UUID="(lvmのUUIDを表示)" TYPE="ext4"
/dev/mapper/rhel-swap: UUID="(lvmのUUIDを表示)" TYPE="swap"
/dev/mapper/(ブロックストレージUUID): UUID="(ブロックストレージボリュームUUID)" TYPE="ext4"
[oot@test ~]# mount -t ext4 UUID="(ブロックストレージボリュームUUID)" /var/log2
[oot@test ~]# df -h
Filesystem                                     Size  Used Avail Use% Mounted on
/dev/mapper/rhel-root                           41G  1.1G   38G   3% /
devtmpfs                                       1.9G     0  1.9G   0% /dev
tmpfs                                          1.9G     0  1.9G   0% /dev/shm
tmpfs                                          1.9G  8.4M  1.9G   1% /run
tmpfs                                          1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/mapper/rhel-var                            50G  1.4G   46G   3% /var
/dev/vda1                                      477M  107M  341M  24% /boot
/dev/vdb                                        15G   41M   14G   1% /var/log1
tmpfs                                          383M     0  383M   0% /run/user/0
/dev/mapper/(ブロックストレージUUID)               99G   61M   94G   1% /var/log2

リストア先vmの構築¶

OSイメージ: Full-System-Restore_for_RHEL_v2.0
root disk: ディスクを100GBとしたいので、イメージ直接起動ではなく100GBボリュームにイメージをマウントし、ブータブルボリュームを作成します。
追加データボリューム: 15GB空ディスク
Block storage: 100GB

手順¶

rootディスクのパーティション#1を削除し、新たに boot 領域500MBを作成します。

[root@test2(FSR)]# parted /dev/vda
GNU Parted 3.1
Using /dev/vda
Welcome to GNU Parted! Type 'help' to view a list of commands.

(parted) unit B
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374182400B
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start     End           Size          Type     File system  Flags
 1      1048576B  10738466815B  10737418240B  primary  xfs          boot

(parted) rm 1
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374182400B
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start  End  Size  Type  File system  Flags

(parted)
(parted) mkpart primary 1048576B 525336575B
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374182400B
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start     End         Size        Type     File system  Flags
 1      1048576B  525336575B  524288000B  primary  xfs  # file system が xfs になっているが、後でext4 に変更行う。

(parted) set 1 boot on
print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374182400B
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start     End         Size        Type     File system  Flags
 1      1048576B  525336575B  524288000B  primary  xfs          boot

(parted)

rootディスクの free space を lvm 化します。

[root@test2(FSR)]# parted /dev/vda
GNU Parted 3.1
Using /dev/vda
Welcome to GNU Parted! Type 'help' to view a list of commands.

(parted) print free
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End       Size      Type     File system  Flags
        0.03MB  1.05MB    1.02MB             Free Space
 1      1.05MB  525MB     524MB     primary  xfs          boot
        525MB   107374MB  106849MB           Free Space

(parted) mkpart primary 525MB 107374MB
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End       Size      Type     File system  Flags
 1      1.05MB  525MB     524MB     primary  xfs          boot
 2      525MB   107374MB  106849MB  primary

(parted) set 2 lvm on
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 107374MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End       Size      Type     File system  Flags
 1      1.05MB  525MB     524MB     primary  xfs          boot
 2      525MB   107374MB  106849MB  primary               lvm

(parted)

bootのファイルシステムを ext4 へ変換します。

[root@test2(FSR)]# mkfs -t ext4 /dev/vda1
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
Stride=0 blocks, Stripe width=0 blocks
128016 inodes, 512000 blocks
25600 blocks (5.00%) reserved for the super user
First data block=1
Maximum filesystem blocks=34078720
63 block groups
8192 blocks per group, 8192 fragments per group
2032 inodes per group
Superblock backups stored on blocks:
        8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409

Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done

PV(Physical Volume)および VG(Volume Group)を作成します。

[root@test2(FSR)]# pvcreate /dev/vda2
  Physical volume "/dev/vda2" successfully created.
[root@test2(FSR)]# pvscan
  PV /dev/vda2                      lvm2 [99.51 GiB]
  Total: 1 [99.51 GiB] / in use: 0 [0   ] / in no VG: 1 [99.51 GiB]
[root@test2(FSR)]# vgcreate rhel /dev/vda2
[root@test2(FSR)]# pvscan
  PV /dev/vda2   VG rhel            lvm2 [99.51 GiB / 99.51 GiB free]
  Total: 1 [99.51 GiB] / in use: 1 [99.51 GiB] / in no VG: 0 [0   ]

LV(Logical Volume)を作成します。

[root@test2(FSR)]# lvcreate --name var 50G rhel
  Logical volume "var" created.
[root@test2(FSR)]# lvcreate --name swap --size 8G rhel
  Logical volume "swap" created.
[root@test2(FSR)]# lvcreate --name root -l 100%FREE rhel
  Logical volume "root" created.

swap領域の作成します。

[root@test2(FSR)]# mkswap /dev/rhel/swap
Setting up swapspace version 1, size = 8388604 KiB
no label, UUID=(root diskのUUIDを表示)
[root@test2(FSR)]# swapon /dev/rhel/swap
[root@test2(FSR)]# free
              total        used        free      shared  buff/cache   available
Mem:        3915860      136276     3579488       49588      200096     3529108
Swap:       8388604           0     8388604
[root@test2(FSR)]# cat /proc/swaps
Filename                                Type            Size    Used    Priority
/dev/dm-1                               partition       8388604 0       -1

ファイルシステムの作成します。

[root@test2(FSR)]# mkfs -t ext4 /dedev/rhel/root
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
2722608 inodes, 10881024 blocks
544051 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2160066560
333 block groups
32768 blocks per group, 32768 fragments per group
8176 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624

Allocating group tables:   0/333       done
Writing inode tables:   0/333       done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information:   0/333       done

[root@test2(FSR)]# mkfs -t ext4 /dev/rhel/var
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
3276800 inodes, 13107200 blocks
655360 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2162163712
400 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424

Allocating group tables:   0/400       done
Writing inode tables:   0/400       done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information:   0/400       done

ファイルシステムのマウントします。

[root@test2(FSR) ~]# mount /dev/rhel/root /mnt
[root@test2(FSR) ~]# mkdir /mnt/boot
[root@test2(FSR) ~]# mount /dev/vda1 /mnt/boot
[root@test2(FSR) ~]# mkdir /mnt/var
[root@test2(FSR) ~]# mount /dev/rhel/var /mnt/var
[root@test2(FSR) ~]# df -h
Filesystem             Size  Used Avail Use% Mounted on
/dev/vdb1               15G  1.1G   14G   8% /
devtmpfs               1.8G     0  1.8G   0% /dev
tmpfs                  1.9G     0  1.9G   0% /dev/shm
tmpfs                  1.9G  8.4M  1.9G   1% /run
tmpfs                  1.9G     0  1.9G   0% /sys/fs/cgroup
tmpfs                  383M     0  383M   0% /run/user/0
/dev/mapper/rhel-root   41G   49M   39G   1% /mnt
/dev/vda1              477M  2.3M  445M   1% /mnt/boot
/dev/mapper/rhel-var    50G   53M   47G   1% /mnt/var

追加データボリュームをアタッチし、マウントします。

[root@test2(FSR) ~]# /sbin/mkfs.ext4 /dev/vdc
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
983040 inodes, 3932160 blocks
196608 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2151677952
120 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208

Allocating group tables: 0/120 done
Writing inode tables: 0/120 done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: 0/120 done

[root@test2(FSR) ~]# mkdir /mnt/var/log1
[root@test2(FSR) ~]# blkid
/dev/vda1: UUID="(root diskのUUIDを表示)" TYPE="ext4"
/dev/vdb1: UUID="(root diskのUUIDを表示)" TYPE="ext2"
/dev/vda2: UUID="(root diskのUUIDを表示)" TYPE="LVM2_member"
/dev/mapper/rhel-var: UUID="(lvmのUUIDを表示)" TYPE="ext4"
/dev/mapper/rhel-swap: UUID="(lvmのUUIDを表示)" TYPE="swap"
/dev/mapper/rhel-root: UUID="(lvmのUUIDを表示)" TYPE="ext4"
/dev/vdc: UUID="(追加ボリュームのUUID)" TYPE="ext4"
[root@test2(FSR) ~]# mount -t ext4 UUID="(追加ボリュームのUUID)" /mnt/var/log1
[root@test2(FSR) ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/vdb1 15G 1.1G 14G 8% /
devtmpfs 1.8G 0 1.8G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 8.4M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
tmpfs 383M 0 383M 0% /run/user/0
/dev/mapper/rhel-root 41G 49M 39G 1% /mnt
/dev/vda1 477M 2.3M 445M 1% /mnt/boot
/dev/mapper/rhel-var 50G 53M 47G 1% /mnt/var
/dev/vdc 15G 41M 14G 1% /mnt/var/log1

同様にブロックスストレージをマウントします。ブロックストレージのチュートリアルに従って、multipath の設定まで実施しておきます。

[root@test2(FSR) ~]# mkfs.ext4 /dev/mapper/(ブロックストレージUUID)
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=16 blocks
6561792 inodes, 26218080 blocks
1310904 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2174746624
801 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872

Allocating group tables:   0/801       done
Writing inode tables:   0/801       done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information:   0/801       done

[root@test2(FSR) ~]# mkdir /mnt/var/log2
[root@test2(FSR) ~]# mount /dev/mapper/(ブロックストレージUUID) /mnt/var/log2
[root@test2(FSR) ~]# df -h
Filesystem                                     Size  Used Avail Use% Mounted on
/dev/vdb1                                       15G  1.1G   13G   8% /
devtmpfs                                       1.8G     0  1.8G   0% /dev
tmpfs                                          1.9G     0  1.9G   0% /dev/shm
tmpfs                                          1.9G  8.4M  1.9G   1% /run
tmpfs                                          1.9G     0  1.9G   0% /sys/fs/cgroup
tmpfs                                          383M     0  383M   0% /run/user/0
/dev/mapper/rhel-root                           41G   49M   39G   1% /mnt
/dev/vda1                                      477M  2.3M  445M   1% /mnt/boot
/dev/mapper/rhel-var                            50G   53M   47G   1% /mnt/var
/dev/vdc                                        15G   41M   14G   1% /mnt/var/log1
/dev/mapper/(ブロックストレージUUID)               99G   61M   94G   1% /mnt/var/log2

システムリストアの実行¶

システムリストアを実行する。なお、Config preset は "custom settings”を選択します。

リストア先を reboot する前に /mnt/etc/fstab (reboot後の /etc/fstab) を開き、ブロックストレージのマウントオプションで "_netdev" を指定します。

[root@test2(FSR) ~]# /mnt/etc/fstab
UUID=(lvmのUUIDを表示) /    ext4    defaults    1 1
UUID=(root diskのUUIDを表示) /boot    ext4    defaults    0 0
UUID=(lvmのUUIDを表示)d /var    ext4    defaults    0 0
UUID=(追加ボリュームのUUID)/var/log1    ext4    defaults    0 0
/dev/mapper/(lvmのUUIDを表示) /var/log2    ext4    _netdev    0 0
UUID=(lvmのUUIDを表示) swap    swap    defaults　0 0

/mnt/etc/iscsi/initiatorname.iscsi の initiatorname(元々はリストア先ブロックストレージに設定されていたもの) がリストア先のブロックストレージに設定されていること、バックアップ元のブロックストレージに設定されていないことを確認する。(リストア先, バックアップ元両方に同じ initiatornameが設定されているとmultipath 設定ができません。)
OS起動後、ブロックストレージのチュートリアルに従って、multipath 設定をします。