Docker中的Cgroup Driver:Cgroupfs 与 Systemd

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mob604756f2882b 2020-11-19 18:59:00

文章标签 k8s docker bootstrap ide 无法启动 文章分类 代码人生

在安装kubernetes的过程中，会出现

failed to create kubelet: misconfiguration: kubelet cgroup driver: "cgroupfs" is different from docker cgroup driver: "systemd"

文件驱动默认由systemd改成cgroupfs, 而我们安装的docker使用的文件驱动是systemd, 造成不一致, 导致镜像无法启动

docker info查看

Cgroup Driver: systemd

现在有两种方式, 一种是修改docker, 另一种是修改kubelet,

修改docker:#

修改或创建/etc/docker/daemon.json，加入下面的内容：

{

"exec-opts": ["native.cgroupdriver=systemd"]

}

重启docker:

systemctl restart docker

systemctl status docker

修改kubelet:#

vim /etc/systemd/system/kubelet.service.d/10-kubeadm.conf

Note: This dropin only works with kubeadm and kubelet v1.11+

[Service]

Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf"

Environment="KUBELET_CONFIG_ARGS=--config=/var/lib/kubelet/config.yaml"

This is a file that "kubeadm init" and "kubeadm join" generates at runtime, populating the KUBELET_KUBEADM_ARGS variable dynamically

EnvironmentFile=-/var/lib/kubelet/kubeadm-flags.env

This is a file that the user can use for overrides of the kubelet args as a last resort. Preferably, the user should usethe .NodeRegistration.KubeletExtraArgs object in the configuration files instead. KUBELET_EXTRA_ARGS should be sourced from this file.

EnvironmentFile=-/etc/sysconfig/kubelet

ExecStart=

ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS

添加如下内容--cgroup-driver=systemd

img

或者：

配置kubelet使用国内pause镜像配置kubelet的cgroups获取docker的cgroups

$ DOCKER_CGROUPS=$(docker info | grep 'Cgroup' | cut -d' ' -f3)

$ echo $DOCKER_CGROUPS

$ cat >/etc/sysconfig/kubelet<<EOF

KUBELET_CGROUP_ARGS="--cgroup-driver=$DOCKER_CGROUPS"

KUBELET_EXTRA_ARGS="--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1"