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在 Intel x64 系统上安装新内核不会写入 /var/run/reboot-required（但在 RasPi 上可以）

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在 Intel x64 系统上安装新内核不会写入 /var/run/reboot-required（但在 RasPi 上可以）

我在 Intel Atom（amd64）和 Raspberry Pi（arm64）上安装了 Ubuntu Server 22.04。

使用最新的内核更新（由 安装unattended-upgrades），文件/var/run/reboot-required和/var/run/reboot-required.pkgs尚未在英特尔系统上创建（因此系统未标记为重新启动），但在 RasPi 上它可以按预期工作。

日志条目从/var/log/apt/history.log。

英特尔凌动 (Intel Atom)：

Start-Date: 2022-05-24  06:52:55
Commandline: /usr/bin/unattended-upgrade
Install: linux-image-5.15.0-33-generic:amd64 (5.15.0-33.34, automatic), linux-headers-5.15.0-33-generic:amd64 (5.15.0-33.34, automatic), linux-modules-5.15.0-33-generic:amd64 (5.15.0-33.34, automatic), linux-headers-5.15.0-33:amd64 (5.15.0-33.34, automatic), linux-modules-extra-5.15.0-33-generic:amd64 (5.15.0-33.34, automatic)
Upgrade: linux-headers-generic:amd64 (5.15.0.30.33, 5.15.0.33.36), linux-generic:amd64 (5.15.0.30.33, 5.15.0.33.36), linux-image-generic:amd64 (5.15.0.30.33, 5.15.0.33.36)
End-Date: 2022-05-24  06:53:41

Start-Date: 2022-05-24  06:53:46
Commandline: /usr/bin/unattended-upgrade
Remove: linux-headers-5.15.0-27-generic:amd64 (5.15.0-27.28)
End-Date: 2022-05-24  06:53:47

Start-Date: 2022-05-24  06:53:51
Commandline: /usr/bin/unattended-upgrade
Remove: linux-modules-extra-5.15.0-27-generic:amd64 (5.15.0-27.28), linux-image-5.15.0-27-generic:amd64 (5.15.0-27.28), linux-modules-5.15.0-27-generic:amd64 (5.15.0-27.28)
End-Date: 2022-05-24  06:53:56

Start-Date: 2022-05-24  06:54:00
Commandline: /usr/bin/unattended-upgrade
Remove: linux-headers-5.15.0-27:amd64 (5.15.0-27.28)
End-Date: 2022-05-24  06:54:02

树莓派：

Start-Date: 2022-05-25  06:44:33
Commandline: /usr/bin/unattended-upgrade
Install: linux-modules-5.15.0-1008-raspi:arm64 (5.15.0-1008.8, automatic), linux-raspi-headers-5.15.0-1008:arm64 (5.15.0-1008.8, automatic), linux-image-5.15.0-1008-raspi:arm64 (5.15.0-1008.8, automatic), linux-headers-5.15.0-1008-raspi:arm64 (5.15.0-1008.8, automatic)
Upgrade: linux-headers-raspi:arm64 (5.15.0.1006.6, 5.15.0.1008.8), linux-raspi:arm64 (5.15.0.1006.6, 5.15.0.1008.8), linux-image-raspi:arm64 (5.15.0.1006.6, 5.15.0.1008.8)
End-Date: 2022-05-25  06:46:44

Start-Date: 2022-05-25  06:47:16
Commandline: /usr/bin/unattended-upgrade
Remove: linux-modules-5.15.0-1005-raspi:arm64 (5.15.0-1005.5), linux-image-5.15.0-1005-raspi:arm64 (5.15.0-1005.5)
End-Date: 2022-05-25  06:47:20

Start-Date: 2022-05-25  06:47:26
Commandline: /usr/bin/unattended-upgrade
Remove: linux-headers-5.15.0-1005-raspi:arm64 (5.15.0-1005.5)
End-Date: 2022-05-25  06:47:29

Start-Date: 2022-05-25  06:47:35
Commandline: /usr/bin/unattended-upgrade
Remove: linux-raspi-headers-5.15.0-1005:arm64 (5.15.0-1005.5)
End-Date: 2022-05-25  06:47:42

内核历史（5.15内核行）：dpkg --list *linux-image* | grep "\-5.15" | grep -v "un"

英特尔凌动 (Intel Atom)：（现已安装内核 5.15.0-30 和 5.15.0-33）

rc  linux-image-5.15.0-27-generic          5.15.0-27.28  amd64        Signed kernel image generic
ii  linux-image-5.15.0-30-generic          5.15.0-30.31  amd64        Signed kernel image generic
ii  linux-image-5.15.0-33-generic          5.15.0-33.34  amd64        Signed kernel image generic

树莓派：（现已安装内核 5.15.0-1006 和 5.15.0-1008）

rc  linux-image-5.15.0-1005-raspi          5.15.0-1005.5 arm64        Linux kernel image for version 5.15.0 on ARMv8 SMP
ii  linux-image-5.15.0-1006-raspi          5.15.0-1006.6 arm64        Linux kernel image for version 5.15.0 on ARMv8 SMP
ii  linux-image-5.15.0-1008-raspi          5.15.0-1008.8 arm64        Linux kernel image for version 5.15.0 on ARMv8 SMP

文件目录 /var/run/reboot-required和/var/run/reboot-required.pkgs。

英特尔凌动 (Intel Atom)：

$ cat /var/run/reboot-required
cat: /var/run/reboot-required: No such file or directory

$ cat /var/run/reboot-required.pkgs
cat: /var/run/reboot-required.pkgs: No such file or directory

树莓派：

$ cat /var/run/reboot-required
*** System restart required ***

$ cat /var/run/reboot-required.pkgs
linux-image-5.15.0-1008-raspi
linux-base

我已经读过了这个答案，但我在两个系统上都安装了该软件包update-notifier-common。而且，符号链接/run -> /var/run也存在。

两个系统都已从 20.04 升级，现在它在两个系统上都按预期运行。还应注意，对于其他软件包（例如libssl3），我很确定/var/run/reboot-required两个系统上都已更新。

这对我来说有点烦人，因为我使用这些文件，既是为了知道已安装内核更新，也是为了在指定时间触发手动重启。因此，任何关于如何解决此问题并获取要/var/run/reboot-required写入的文件的建议都将不胜感激。

注意：我刚刚从一位朋友那里得到确认（他也有一台 Intel 服务器），这里的文件已经按预期写入。所以看起来这也不是软件包错误。

答案1

因此现在，我的解决方案是每天运行以下脚本来模仿/cron的所需行为：aptunattended-upgrade

#!/bin/bash

# Get last reboot time and installed kernel
lastreboot=$(date -r /home/am/last_reboot +%s)
kernelinst=$(grep 'Upgrade: linux-headers-generic' /var/log/apt/history.log -A 1 -B 1 | tail -n 3)

# Get kernel version and install date
if [[ -n "$kernelinst" ]]
then
  kernelvers=$(echo "$kernelinst" | grep -oP 'linux-image-[0-9]+\.[0-9]+\.[0-9-]+[A-Z-a-z]+')
  kerneldate=$(date -d $(echo "$kernelinst" | grep 'End-Date' | awk '{print $2}') +%s)
fi

# Check if reboot-required.pkgs is already updated
if [[ -f /var/run/reboot-required.pkgs ]]
then
  kernelpkgs=$(grep "$kernelvers" /var/run/reboot-required.pkgs)
fi

# Write to reboot-required/reboot-required.pkgs if conditions are met
if [[ "$kerneldate" -gt "$lastreboot" ]] && [[ "$kernelvers" != "$kernelpkgs" ]]
then
  # Echo to /var/run/reboot-required
  echo "*** System restart required ***" | tee /var/run/reboot-required
  # Echo to /var/run/reboot-required.pkgs
  echo "$kernelvers" | tee -a /var/run/reboot-required.pkgs
  echo "linux-base" | tee -a /var/run/reboot-required.pkgs
else
  echo "Do nothing"
fi

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