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kdump.service 在 CentOS 8 上启动失败

tag-icon • tag-icon centos systemctl kdump
kdump.service 在 CentOS 8 上启动失败

问题

kdump.service无法在 Google Cloud 上的 CentOS 8 虚拟机上启动。重新启动服务不断重现相同的错误。

似乎是secure boot导致问题的原因或至少与之相关。无法加载所需的密钥。

这解决方案CentOS 7 无法解决该问题。软件包kexec-tools、crash、 和kernel-debug已安装。

我该如何解决这个问题？谢谢。

以下是技术细节。

环境

  • Google Cloud 上的 CentOS 8 虚拟机实例
  • 操作系统版本：CentOS Linux release 8.2.2004 (Core)
  • 内核版本：4.18.0-193.19.1.el8_2.x86_64

细节

systemctl status kdump.service输出：

kdump.service - Crash recovery kernel arming
   Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Mon 2020-10-19 23:18:32 UTC; 2min 2s ago
  Process: 131082 ExecStart=/usr/bin/kdumpctl start (code=exited, status=1/FAILURE)
 Main PID: 131082 (code=exited, status=1/FAILURE)

Oct 19 23:18:28 my_hostname systemd[1]: Starting Crash recovery kernel arming...
Oct 19 23:18:32 my_hostname kdumpctl[131082]: Secure Boot is enabled. Using kexec file based syscall.
Oct 19 23:18:32 my_hostname kdumpctl[131082]: kexec_file_load failed: Required key not available
Oct 19 23:18:32 my_hostname kdumpctl[131082]: kexec: failed to load kdump kernel
Oct 19 23:18:32 my_hostname kdumpctl[131082]: Starting kdump: [FAILED]
Oct 19 23:18:32 my_hostname systemd[1]: kdump.service: Main process exited, code=exited, status=1/FAILURE
Oct 19 23:18:32 my_hostname systemd[1]: kdump.service: Failed with result 'exit-code'.
Oct 19 23:18:32 my_hostname systemd[1]: Failed to start Crash recovery kernel arming.

journalctl -xe输出：

Oct 19 23:18:32 my_hostname kdumpctl[131082]: Secure Boot is enabled. Using kexec file based syscall.
Oct 19 23:18:32 my_hostname kdumpctl[131082]: kexec_file_load failed: Required key not available
Oct 19 23:18:32 my_hostname kdumpctl[131082]: kexec: failed to load kdump kernel
Oct 19 23:18:32 my_hostname kdumpctl[131082]: Starting kdump: [FAILED]
Oct 19 23:18:32 my_hostname systemd[1]: kdump.service: Main process exited, code=exited, status=1/FAILURE
Oct 19 23:18:32 my_hostname systemd[1]: kdump.service: Failed with result 'exit-code'.
Oct 19 23:18:32 my_hostname systemd[1]: Failed to start Crash recovery kernel arming.
-- Subject: Unit kdump.service has failed
-- Defined-By: systemd
-- Support: https://access.redhat.com/support
--
-- Unit kdump.service has failed.
--
-- The result is failed.
Oct 19 23:18:32 my_hostname sudo[131078]: pam_unix(sudo:session): session closed for user root

cat /proc/keys输出：

00e8d728 I--Q---    14 perm 3f030000  1002    10 keyring   _ses: 1
029d6be0 I--Q---     1 perm 1f3f0000  1002 65534 keyring   _uid_ses.1002: 1
321674d8 I--Q---    11 perm 3f030000  1002    10 keyring   _ses: 1
37bb77f9 I--Q---     3 perm 1f3f0000  1002 65534 keyring   _uid.1002: empty
3b9154f0 I--Q---     8 perm 3f030000  1002    10 keyring   _ses: 1

rpm -q kexec-tools输出：

kexec-tools-2.0.20-14.el8.x86_64

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