kubelet启动失败

kubelet 启动失败

错误日志

Jun 29 16:05:19 master0 kubelet[29613]: E0629 16:05:19.744377   29613 node_container_manager_linux.go:61] "Failed to create cgroup" err="Cannot set property TasksAccounting, or unknown property." cgroupName=[kubepods]
Jun 29 16:05:19 master0 kubelet[29613]: E0629 16:05:19.744410   29613 kubelet.go:1466] "Failed to start ContainerManager" err="Cannot set property TasksAccounting, or unknown property."

问题定位

检查容器运行时和kubelet是否使用了相同的cgroup driver

命令：cat /var/lib/kubelet/config.yaml 和 docker info
结论：一致的

检查systemd 版本

[root@master0 ~]# rpm -q systemd
systemd-219-30.el7_3.6.x86_64

低版本systemd导致的 failed to set TasksAccounting

In runc, there is a piece of code which try to set property TasksAccounting=true on kubepods.slice. With 219-30.el7_3.9, I tried systemctl set-property kubepods.slice TasksAccounting=yes and create /run/systemd/system/kubepods.slice.d/50-TasksAccounting.conf, but these approaches failed to set TasksAccounting. With 219-62.el7_6.9, it works well.

BTW, in the systemd official change logs, TasksAccounting is introduced in systemd 227, confusing.