Ubuntu 22.04环境下K3s安装后启动失败的问题排查求助

各位好，我在Ubuntu 22.04上安装K3s时遭遇了启动失败的问题，折腾了半天没找到根源，想请教大家帮忙排查一下。以下是我的操作流程和遇到的具体错误：

安装操作 #

我执行了这条K3s安装命令：

curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC="server --flannel-backend none" K3S_TOKEN=prokupljejbb sh -s -

安装日志显示大部分步骤都顺利完成，但最后提示跳过了服务启动：

[INFO]  Installing k3s to /usr/local/bin/k3s
[INFO]  Skipping installation of SELinux RPM
[INFO]  Skipping /usr/local/bin/kubectl symlink to k3s, already exists
[INFO]  Skipping /usr/local/bin/crictl symlink to k3s, already exists
[INFO]  Skipping /usr/local/bin/ctr symlink to k3s, command exists in PATH at /usr/bin/ctr
[INFO]  Creating killall script /usr/local/bin/k3s-killall.sh
[INFO]  Creating uninstall script /usr/local/bin/k3s-uninstall.sh
[INFO]  env: Creating environment file /etc/systemd/system/k3s.service.env
[INFO]  systemd: Creating service file /etc/systemd/system/k3s.service
[INFO]  systemd: Enabling k3s unit
Created symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service.
[INFO]  No change detected so skipping service start

首次启动失败 #

查看服务状态时发现异常：

systemctl status k3s

输出显示服务处于自动重启循环，ExecStart步骤返回status=203/EXEC错误：

● k3s.service - Lightweight Kubernetes
Loaded: loaded (/etc/systemd/system/k3s.service; enabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: exit-code) since Fri 2023-04-28 12:48:49 CEST; 1s ago
Docs: https://k3s.io
Process: 77789 ExecStartPre=/bin/sh -xc ! /usr/bin/systemctl is-enabled --quiet nm-cloud-setup.service (code=>
Process: 77791 ExecStartPre=/sbin/modprobe br_netfilter (code=exited, status=0/SUCCESS)
Process: 77792 ExecStartPre=/sbin/modprobe overlay (code=exited, status=0/SUCCESS)
Process: 77793 ExecStart=/usr/local/bin/k3s server --flannel-backend none (code=exited, status=203/EXEC)
Main PID: 77793

尝试手动启动也失败：

systemctl start k3s

错误提示：

Job for k3s.service failed because the control process exited with error code.
See "systemctl status k3s.service" and "journalctl -xeu k3s.service" for details.

我检查了/usr/local/bin/k3s的文件信息：

ls -laZ /usr/local/bin/k3s

输出：

total 65716
drwxr-xr-x 2 root root ?     4096 апр 28 12:47 .
drwxr-xr-x 3 root root ?     4096 апр 28 12:47 ..
-rwxr-xr-x 1 root root ? 67284992 апр 28 12:47 k3s.bin

这里先想请教一下：status=203/EXEC这个错误码一般指向什么问题？

尝试修复后的新问题 #

我删除了相关符号链接和残留目录，重新执行安装命令，这次日志显示创建了之前缺失的符号链接：

[INFO]  Creating /usr/local/bin/kubectl symlink to k3s
[INFO]  Creating /usr/local/bin/crictl symlink to k3s
[INFO]  Creating /usr/local/bin/ctr symlink to k3s
[INFO]  Creating killall script /usr/local/bin/k3s-killall.sh
[INFO]  Creating uninstall script /usr/local/bin/k3s-uninstall.sh
[INFO]  env: Creating environment file /etc/systemd/system/k3s.service.env
[INFO]  systemd: Creating service file /etc/systemd/system/k3s.service
[INFO]  systemd: Enabling k3s unit
Created symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service.
[INFO]  No change detected so skipping service start

但再次查看服务状态时，错误变成了status=1/FAILURE：

Process: 97794 ExecStartPre=/bin/sh -xc ! /usr/bin/systemctl is-enabled --quiet nm-cloud-setup.service (code=>
Process: 97796 ExecStartPre=/sbin/modprobe br_netfilter (code=exited, status=0/SUCCESS)
Process: 97797 ExecStartPre=/sbin/modprobe overlay (code=exited, status=0/SUCCESS)
Process: 97798 ExecStart=/usr/local/bin/k3s server --flannel-backend none (code=exited, status=1/FAILURE)
Main PID: 97798 (code=exited, status=1/FAILURE)

查看journalctl的输出：

The process' exit code is 'exited' and its exit status is 1.
апр 28 13:31:32 miki-IdeaPad systemd[1]: k3s.service: Failed with result 'exit-code'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support: http://www.ubuntu.com/support
░░
░░ The unit k3s.service has entered the 'failed' state with result 'exit-code'.
апр 28 13:31:32 miki-IdeaPad systemd[1]: Failed to start Lightweight Kubernetes.
░░ Subject: A start job for unit k3s.service has failed
░░ Defined-By: systemd

现在完全摸不着头绪了，有没有大佬能帮忙分析一下问题出在哪？

备注：内容来源于stack exchange，提问作者MikiBelavista