マルチパスディスクの交換後に ReaR バックアップを復元する方法
Issue
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ディスク交換後に、デフォルト以外のデバイス名 (例:
mpathXではなくSystem) を持つマルチパスディスクがある場合、ReaR を使用してシステムをリカバリーすると、以下のエラーが発生して失敗します。-
rear recoverの出力:# rear recover Relax-and-Recover 2.00 / Git Using log file: /var/log/rear/rear-mystem.log Running workflow recover within the ReaR rescue/recovery system Comparing disks. Disk configuration is identical, proceeding with restore. Start system layout restoration. Creating partitions for disk /dev/mapper/System (gpt) An error occurred during layout recreation. 1) View Relax-and-Recover log 2) View original disk space usage 3) Go to Relax-and-Recover shell 4) Edit restore script (diskrestore.sh) 5) Continue restore script 6) Abort Relax-and-Recover -
rear のログファイル:
# cat /var/log/rear/rear-mysystem.log 2018-01-19 13:51:51 Start system layout restoration. WARNING: Failed to connect to lvmetad. Falling back to device scanning. +++ create_component /dev/mapper/System multipath +++ local device=/dev/mapper/System +++ local type=multipath +++ local touchfile=multipath--dev-mapper-System +++ '[' -e /tmp/rear.YC1N4WQZ1IL0W8d/tmp/touch/multipath--dev-mapper-System ']' +++ return 0 +++ LogPrint 'Creating partitions for disk /dev/mapper/System (gpt)' +++ Log 'Creating partitions for disk /dev/mapper/System (gpt)' +++ test 1 -gt 0 ++++ Stamp ++++ date '+%Y-%m-%d %H:%M:%S ' +++ echo '2018-01-19 13:51:51 Creating partitions for disk /dev/mapper/System (gpt)' 2018-01-19 13:51:51 Creating partitions for disk /dev/mapper/System (gpt) +++ Print 'Creating partitions for disk /dev/mapper/System (gpt)' +++ test 1 +++ echo -e 'Creating partitions for disk /dev/mapper/System (gpt)' +++ my_udevsettle +++ has_binary udevadm +++ for bin in '$@' +++ type udevadm +++ return 0 +++ udevadm settle +++ parted -s /dev/mapper/System mklabel gpt Error: Could not stat device /dev/mapper/System - No such file or directory. 2018-01-19 13:51:51 An error occurred during layout recreation.
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ReaR を使用してシステムを別のマルチパスディスクに移行しようとすると、元のディスクが
mpathaにマップされていない (つまり、ディスクがmpathcにマップされている) ため、以下のエラーが発生して失敗します。-
rear recoverの出力:# rear recover Relax-and-Recover 2.00 / Git Using log file: /var/log/rear/rear-mystem.log Running workflow recover within the ReaR rescue/recovery system Comparing disks. Disk configuration is identical, proceeding with restore. Start system layout restoration. Creating partitions for disk /dev/mapper/mpathc (gpt) An error occurred during layout recreation. 1) View Relax-and-Recover log 2) View original disk space usage 3) Go to Relax-and-Recover shell 4) Edit restore script (diskrestore.sh) 5) Continue restore script 6) Abort Relax-and-Recover -
rear のログファイル:
# cat /var/log/rear/rear-mysystem.log 2018-01-19 13:51:51 Start system layout restoration. WARNING: Failed to connect to lvmetad. Falling back to device scanning. +++ create_component /dev/mapper/mpathc multipath +++ local device=/dev/mapper/mpathc +++ local type=multipath +++ local touchfile=multipath--dev-mapper-mpathc +++ '[' -e /tmp/rear.YC1N4WQZ1IL0W8d/tmp/touch/multipath--dev-mapper-mpathc ']' +++ return 0 +++ LogPrint 'Creating partitions for disk /dev/mapper/mpathc (gpt)' +++ Log 'Creating partitions for disk /dev/mapper/mpathc (gpt)' +++ test 1 -gt 0 ++++ Stamp ++++ date '+%Y-%m-%d %H:%M:%S ' +++ echo '2018-01-19 13:51:51 Creating partitions for disk /dev/mapper/mpathc (gpt)' 2018-01-19 13:51:51 Creating partitions for disk /dev/mapper/mpathc (gpt) +++ Print 'Creating partitions for disk /dev/mapper/mpathc (gpt)' +++ test 1 +++ echo -e 'Creating partitions for disk /dev/mapper/mpathc (gpt)' +++ my_udevsettle +++ has_binary udevadm +++ for bin in '$@' +++ type udevadm +++ return 0 +++ udevadm settle +++ parted -s /dev/mapper/mpathc mklabel gpt Error: Could not stat device /dev/mapper/mpathc - No such file or directory. 2018-01-19 13:51:51 An error occurred during layout recreation.
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Environment
- Red Hat Enterprise Linux 7
- rear 2.00
- multipath
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