编写Dockerfile制作Web应用系统nginx镜像，生成镜像名为nginx:v1.1，并推送其到私有仓库。

    1、基于centos7基础镜像；

    2、指定作者为Chinaskill；

    3、安装nginx服务，将提供的dest目录传到镜像内，并将dest目录内的前端文件复制到nginx的工作目录；

    4、暴露80端口；

    5、设置服务自启动。

 第一步：开机启动docker服务，编写Dockerfile

[root@localhost nginx]# vim Dockerfile
FROM centos:7
MAINTAINER Chinaskill
RUN yum install -y epel-release && yum install -y nginx
COPY index.html /usr/share/nginx/html
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]

第二步：创建nginx目录，切换到nginx目录输入nginx test page.到index.html文件中

[root@localhost nginx]# ll
total 4
-rw-r--r--. 1 root root 177 Mar 14 17:58 Dockerfile
[root@localhost nginx]# echo "nginx test page." > index.html
[root@localhost nginx]# 
[root@localhost nginx]# ll
total 8
-rw-r--r--. 1 root root 177 Mar 14 17:58 Dockerfile
-rw-r--r--. 1 root root  17 Mar 14 18:01 index.html

第三步：构建nginx镜像

[root@localhost nginx]# docker build -t reg.openlab.cn/opelab/nginx:v1 ./ --load
[+] Building 5.0s (9/9) FINISHED                    docker-container:default
 => [internal] load build definition from Dockerfile                    0.0s
 => => transferring dockerfile: 277B                                    0.0s
 => [internal] load metadata for docker.io/library/centos:7             2.4s
 => [internal] load .dockerignore                                       0.0s
 => => transferring context: 2B                                         0.0s
 => [1/3] FROM docker.io/library/centos:7@sha256:be65f488b7764ad3638f236b7b515b3678369a5124c47b8d32916d6487418ea4      0.0s
 => => resolve docker.io/library/centos:7@sha256:be65f488b7764ad3638f236b7b515b3678369a5124c47b8d32916d6487418ea4      0.0s
 => [internal] load build context                                       0.0s
 => => transferring context: 91B                                        0.0s
 => CACHED [2/3] RUN yum install -y epel-release && yum install -y nginx0.0s
 => CACHED [3/3] COPY index.html /usr/share/nginx/html                  0.0s
 => exporting to docker image format                                    2.5s
 => => exporting layers  0.0s
 => => exporting manifest sha256:8df860d4693fa88eda1d7eee03d585aef46080ec8485e64f4893e1f29ee06546                      0.0s
 => => exporting config sha256:9e9b09d588cc320e6a3ba0c99f01137a6df98dd0308be9e613f0e20b1d5b263d                        0.0s
 => => sending tarball   2.5s
 => importing to docker   

第四步：启动容器

[root@localhost nginx]# docker run -d -P reg.openlab.cn/opelab/nginx:v1
fe1369e8838c13dc0dd2cf9596ff175d9128034d65429d06dc2e7e363de38dfd
[root@localhost nginx]# docker ps
CONTAINER ID   IMAGE                            COMMAND                  CREATED          STATUS          PORTS                   NAMES
fe1369e8838c   reg.openlab.cn/opelab/nginx:v1   "nginx -g 'daemon of…"   4 seconds ago    Up 3 seconds    0.0.0.0:32768->80/tcp   nervous_easley
2c14347c4f15   moby/buildkit:buildx-stable-1    "buildkitd"              15 minutes ago   Up 15 minutes                           buildx_buildkit_default

第五步：根据端口号到浏览器输入IP地址

案例完成！