Build the first Dockerfile

First, we need to create an empty Dokcerfile file;

mkdir dockerfile_test cd dockerfile_test/ touch Dockerfile nano Dockerfile

Next, we need to write a Dockerfile file, the code list is as follows:

FROM centos:7 MAINTAINER LiangGzone "lianggzone@163.com" RUN rpm -ivh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm RUN yum install -y nginx EXPOSE 80

Finally, we build through the docker build command;

docker build -t="lianggzone/nginx_demo:v1" .

Now, let’s take a look at our new image through docker images.

Recommended tutorial:docker

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