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kubeadm初始化警告”cgroupfs“解决

kubeadm初始化时,产生如下警告
[init] Using Kubernetes version: v1.18.2 [preflight] Running pre-flight checks [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/

|-------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 | [init] Using Kubernetes version: v1.18.2 [preflight] Running pre-flight checks [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/ |

官方文档表示,更改设置,令容器运行时和kubelet使用systemd作为cgroup驱动,以此使系统更为稳定。 请注意在docker下设置native.cgroupdriver=systemd选项。

两种解决方式:

一、编辑docker配置文件/etc/docker/daemon.json
"exec-opts": ["native.cgroupdriver=systemd"] systemctl daemon-reload systemctl restart docker

|-------|-------------------------------------------------------------------------------------------------| | 1 2 3 | "exec-opts": ["native.cgroupdriver=systemd"] systemctl daemon-reload systemctl restart docker |

二、编辑/usr/lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --exec-opt native.cgroupdriver=systemd systemctl daemon-reload systemctl restart docker

|-------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 | ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --exec-opt native.cgroupdriver=systemd systemctl daemon-reload systemctl restart docker |

设置完成后通过docker info命令可以看到Cgroup Driver为systemd
docker info | grep Cgroup

|---|----------------------------| | 1 | docker info | grep Cgroup |


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