Creating a Docker image from Dockerfile

Our next step is to create a sample image file. We can build a Docker image using a Dockerfile. It provides step-by-step instructions to building images.

Let's try with a simple CentOS image:

  1. The Dockerfile contains the following two lines:
            FROM centos 
        MAINTAINER mitesh <mitesh.soxxxxxx@xxxxxxxx.com>
  2. Go to the same directory in the terminal and use docker build .to build an image:
                [root@localhost Desktop]# docker build .
            Sending build context to Docker daemon 681.6 MB
            Sending build context to Docker daemon 
            Step 0 : FROM centos
             ---> 2a332da70fd1
            Step 1 : MAINTAINER mitesh < mitesh.soxxxxxx@xxxxxxxx.com >
             ---> Running in 305e8da05500 ...

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