• Docker中的Cgroup Driver:Cgroupfs 与 Systemd


    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 use
    # the .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"
    EOF
    
    # 启动
    $ systemctl daemon-reload
    $ systemctl enable kubelet && systemctl restart kubelet
    

    或者:

    DOCKER_CGROUPS=$(docker info | grep 'Cgroup' | cut -d' ' -f3)
    echo $DOCKER_CGROUPS
    cat >/etc/sysconfig/kubelet<<EOF
    KUBELET_EXTRA_ARGS="--cgroup-driver=$DOCKER_CGROUPS --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1"
    EOF
    
    # 启动
    $ systemctl daemon-reload
    $ systemctl enable kubelet && systemctl restart kubelet
    
    参考:

    https://www.cnblogs.com/sparkdev/p/9523194.html

    https://www.jianshu.com/p/02dc13d2f651

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  • 原文地址:https://www.cnblogs.com/hongdada/p/9771857.html
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