【Apache】 LXC 容器中重启 Apache 报错： Failed to set up mount namespacing: Permission denied

报错信息：
apache2.service: Failed to set up mount namespacing: Permission denied
apache2.service: Failed at step NAMESPACE spawning /usr/sbin/apachectl: Permission denied

$ sudo sed -i -e 's,PrivateTmp=true,PrivateTmp=false\nNoNewPrivileges=yes,g' /lib/systemd/system/apache2.service
$ sudo systemctl daemon-reload
$ sudo systemctl start apache2.service
$ sudo systemctl statup apache2.service

参考链接

https://forum.proxmox.com/threads/apache2-service-failed-to-set-up-mount-namespacing-permission-denied.56871/#post-321034

the solution without nesting:
https://stackoverflow.com/questions/55728957/apache-failed-at-step-namespace
https://help.directadmin.com/item.php?id=614