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kdump.service が起動しない

Solution Verified - Updated -

Issue

  • /var ファイルシステムを別のディスクまたは / ファイルシステム以外の論理ボリュームにマウントされます。
  • kdump サービスを起動すると以下のメッセージが表示されます。
kdumpctl[8848]:No kdump initial ramdisk found.
kdumpctl[8848]:Rebuilding /boot/initramfs-3.10.0-123.4.4.el7.x86_64kdump.img
kdumpctl[8848]:No dump target specified.Default dump target is rootfs block device.
kdumpctl[8848]:But dump path /var/crash is not backed by rootfs block device.
kdumpctl[8848]:Either explicitly specify a dump target or specify a dump path backed by rootfs block device
kdumpctl[8848]: mkdumprd: failed to make kdump initrd
kdumpctl[8848]:Starting kdump:[FAILED]
systemd[1]: kdump.service: main process exited, code=exited, status=1/FAILURE
systemd[1]:Failed to start Crash recovery kernel arming.
systemd[1]:Unit kdump.service entered failed state.

Environment

  • Red Hat Enterprise Linux 7.0

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