红帽全球峰会第 17 章 启用 kdump
对于 RHEL 9 系统，您可以在特定内核或所有安装的内核中配置或者禁用 kdump 功能。但是，您必须定期测试 kdump 功能，并验证其工作状态。
17.1. 为所有安装的内核启用 kdump
复制链接链接已复制到粘贴板!
为在机器上安装的所有内核启动 kdump 服务。该服务在安装 kexec 工具后启动。
先决条件
- 有管理员特权。
流程
将
crashkernel=命令行参数添加到所有安装的内核中：# grubby --update-kernel=ALL --args="crashkernel=xxM"xxM是所需的内存（以 MB 为单位）。-
就 UKI 而言，通过复制与
/lib/modules/$(uname -r)/vmlinuz-virt.efi.extra.d/中与所需参数关联的附加组件，将crashkernel=命令行参数添加到/boot/efi/loader/addons/。 重启系统：
# reboot启用
kdump服务：# systemctl enable --now kdump.service
验证
检查
kdump服务是否正在运行：# systemctl status kdump.servicekdump.service - Crash recovery kernel arming Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled; vendor preset: disabled) Active: active (live)
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