systemctl stop docker

rpm -qa | grep docker             // 查看當前版本

卸載docker

yum erase docker \

   docker-client \

   docker-client-latest \

   docker-common \

   docker-latest \

   docker-latest-logrotate \

   docker-logrotate \

   docker-selinux \

   docker-engine-selinux \

   docker-engine \

   docker-ce

find /etc/systemd -name '*docker*' -exec rm -f {} \;

find /lib/systemd -name '*docker*' -exec rm -f {} \;

rm -rf /var/lib/docker   #刪除以前已有的鏡像和容器,非必要

rm -rf /var/run/docker

添加yum源

yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

查看可安裝版本

yum list docker-ce --showduplicates | sort -r

啟動并開機自啟

systemctl start docker

systemctl enable docker