1、安装dockeryum -y install docker启动docker服务systemctl start docker
2、已nginx镜像为例，进行下面操作。下载nginx镜像docker pull nginx查看下载的nginx镜像docker images
3、启动nginx镜像，将本地/nginx映射到docker中的/usr/share/nginx/html，本地端口80与docker中的80端口映射。docker run --name nginx -v /nginx:/usr/share/nginx/html -p 80:80 -d 2073e0bcb60e查看目录映射关系docker inspect -f "{{.Mounts}}" nginx
4、下面将宿主机挂载的目录从/nginx变更为/html，容器中对应的目录不变/usr/share/nginx/html。步骤如下：关闭docker容器docker stop nginx停止docker服务systemctl stop docker
5、修改容器配置文件cd /var/lib/docker/containers/214fda2756f6eb3358c37856560263012387232f9b54484806c7ce29ded0706f将文件config.v2.json和hostconfig.json中的"Source"从/nginx更改为/html
6、开启docker服务systemctl start docker启动nginx容器docker start nginx
7、查看挂载目录，已经从/nginx变为/html。docker inspect -f "{{.Mounts}}" nginx
