Centos7下Kubernets kubeadm方式安装常见问题（一）

目录

常见问题一，error: failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: “systemd” is different from docker cgroup driver: “cgroupfs”

 常见问题二、error: “Failed to load kubelet config file” err=“failed to load Kubelet config file /var/lib/kubelet/config.yaml”

常见问题一，error: failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: “systemd” is different from docker cgroup driver: “cgroupfs”

解决过程：

1、查看服务状态，发现kubelet服务不正常运行

systemctl status kubelet

2、查看具体报错

journalctl -u kubelet.service 

报错信息如下：

error: failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: “systemd” is different from docker cgroup driver: “cgroupfs”

解决过程

# Step 1 : 问题的判断
# 输出 Group 类型 :　docker info | grep "Cgroup Driver"

# Step 2 : 重置 kubeadm配置
kubeadm reset
# 或者使用 echo y | kubead reset

# Step 3 : 修改 Docker
vim /etc/docker/daemon.json
# 添加 "exec-opts": ["native.cgroupdriver=systemd"]
# PS : 没有可以直接创建 , 最终效果如下
{
 "exec-opts":["native.cgroupdriver=systemd"]
}

# Step 4 : 重启服务
systemctl daemon-reload
systemctl restart docker
systemctl restart kubelet

# Step  5 : 校验结果 , 应该输出为 systemd
docker info | grep "Cgroup Driver"

# 补充 : 
kubelet 的配置文件 : /var/lib/kubelet/kubeadm-flags.env

 关键信息

修改docker cgroup驱动
cat > /etc/docker/daemon.json <<EOF
{"exec-opts": ["native.cgroupdriver=systemd"]}
EOF

 常见问题二、error: “Failed to load kubelet config file” err=“failed to load Kubelet config file /var/lib/kubelet/config.yaml”

解决方法：

kubeadm init --image-repository registry.cn-hangzhou.aliyuncs.com/google_containers