docker启动失败failed to connect to containerd: could not change group /var/run/docker.sock:group docker

docker启动失败failed to connect to containerd: could not change group /var/run/docker.sock:group docker not found

查找一下发现找不到文件vi /etc/sysconfig/docker
改为：--selinux-enabled=false

解决办法：重新安装docker

1、查看已安装docker 包
$ yum list installed | grep docker

因为光执行yum remove docker 删除docker是不够，相关的两个也要删除干净

2、删除镜像/容器等

$ rm -rf /var/lib/docker

3、重新安装 

$ yum install docker

4、重新启动 systemctl start docker

启动docker服务会报错：

Error starting daemon: SELinux is not supported with the overlay2 graph driver on this kernel. Either boot into a newer kernel or disable selinux in docker (--selinux-enabled=false)

解决办法：

vi /etc/sysconfig/docker # /etc/sysconfig/docker   # Modify these options if you want to change the way the docker daemon runs   OPTIONS='--selinux-enabled=false  --log-driver=journald --signature-verification=false' if [ -z "${DOCKER_CERT_PATH}" ]; then     DOCKER_CERT_PATH=/etc/docker fi

#再重启服务

systemctl   start docker 

systemctl enable docker