报错信息

Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats for "/system.slice/docker.service": failed to get container info for "/system.slice/docker.service": unknown container "/system.slice/docker.service"

项目环境

系统：CentOS 7.4

内核：3.10

k8s：v1.16.4

docker：18.09.9

cgroupDriver: cgroupfs

解决措施

方法一：在kubelet启动文件中添加 --runtime-cgroups=/systemd/system.slice --kubelet-cgroups=/systemd/system.slice，如下：

cat /etc/systemd/system/kubelet.service 
[Unit]
Description=kubelet
Wants=remote-fs.target docker.service
After=remote-fs.target docker.service

[Service]

ExecStart=/usr/bin/kubelet  --kubeconfig=/etc/kubernetes/kubelet.conf --config=/var/lib/kubelet/config.yaml --network-plugin=cni --minimum-container-ttl-duration=1h --maximum-dead-containers-per-container=3 --maximum-dead-containers=60 --root-dir=/data/kubelet --runtime-cgroups=/systemd/system.slice --kubelet-cgroups=/systemd/system.slice
Restart=always
RestartSec=15

[Install]
WantedBy=multi-user.target

方法二：配置CPUAccounting、MemoryAccounting环境变量

在/etc/systemd/system/kubelet.service中配置

CPUAccounting=true
MemoryAccounting=true

阿里云ack集群的话可以在/etc/systemd/system/kubelet.service.d/10-kubeadm.conf中添加这两个环境变量

重载配置：

systemctl deamon-reload

systemctl restart kubelet

参考：Failed to get system container stats for "/system.slice/kubelet.service": failed to get cgroup stats for "/system.slice/kubelet.service": failed to get container info for "/system.slice/kubelet.service": unknown container "/system.slice/kubelet.service" · Issue #56850 · kubernetes/kubernetes · GitHub