Create Custom Docker Image

Question 1

High level steps in creating your own docker image

Answer 1

Base Image –> Docker Client –> Docker Server –> Usable Image

Question 2

Flow of creating custom docker image

Answer 2

1. Specify a base image (FROM)
2. Commands to install additional s/w on base image (RUN)
3. Specify command to run when container gets created (CMD)

Question 3

What’s the command to build your own docker image?

Answer 3

“docker build .”, where “.” is the build context, means the files and folders which we want to encapsulate in the custom image we are building

Question 4

How do you tag your image

Answer 4

“docker build devopsulting/redis:latest .”