First prepare docker-ce of the rpm package
- Installation docker and start docker
| yum install -y yum-utils device-mapper-persistent-data lvm2 yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo yum makecache fast yum -y install docker-ce we /etc/docker/daemon.json
#### Add the following content { "registry-mirrors": ["https://dhq9bx4f.mirror.aliyuncs.com"] } ##### save and exit systemctl start docker |
2. Start centos rear container mounting httpd and generate a new image
| docker pull centos ### will get mirrored ID docker run -itd - -name centos /bin/bash ### will get the container ID docker exec -it ( input container ID) bash ### into the docker after container: yum install -y httpd ### After installation, Ctrl + D to exit the container. #### The following generates a new image by changing the container docker commit -m "install httpd" -a "keyuan_test" ( input container ID) new image name ### below the mirror created by the newly created container , and specify 8080: 80 docker run -itd -p 8080: 80 new image name / bin / bash #### into the following command docker container docker exec -it new image container is generated ID bash #### After entering the container, start httpd , and by ctrl + d to exit the container, using a browser or curl command to access the 80 -port httpd -k start curl localhost:8080 |
具体执行参考下面图形，特别时 镜像id和容器id的使用。
从docker hub上拉centos镜像，并通过docker images 命令查看镜像ID
通过镜像id来启动容器，并通过docker exec 命令进入容器并安装httpd
在容器内httpd服务安装完成并ctrl+d退出。
查看当前启动的容器
通过这个容器id提交并生成新的镜像
通过新的镜像ID，启动容器，并映射8080端口到容器的80端口。
进入已安装httpd的容器并启动httpd后通过ctrl+d退出
通过curl的命令访问localhost:8080
表示成功映射到容器内部的80端口。