Python CGI with Docker (Task 7)

 In this project, I have integrated python with Docker !!

Python is one of the most popular languages nowadays and Docker is used for containerization.

What is python CGI?

A CGI script is invoked by an HTTP server, usually to process user input submitted through an HTML <FORM> or <ISINDEX> element.

Most often, CGI scripts live in the server’s special cgi-bin directory. The HTTP server places all sorts of information about the request (such as the client’s hostname, the requested URL, the query string, and lots of other goodies) in the script’s shell environment, executes the script, and sends the script’s output back to the client.

For now info visit :

https://docs.python.org/3/library/cgi.html

Whats is docker?

Docker is a set of platform as a service (PaaS) products that uses OS-level virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries, and configuration files; they can communicate with each other through well-defined channels. All containers are run by a single operating system kernel and therefore use fewer resources than virtual machines.

Now starting with my project,

Step 1:For this firstly I installed docker engine on my red hat 8 using command

# yum install docker -ce --nobest

Step 2: Then I started docker services using

#systemctl start docker

Step 3: Then I made one directory for my project using #mkdir doc_project and in this directory, I made my one file try.py which will have my code related to python CGI which is made using html, CSS, and python 3.

Step 4: In the same directory I will make one more file named Dockerfile which is used to make my own docker image and the configuration inside this file will be like shown in the figure below :

In this we have installed one apache server and python 3 . Then copied my try.py file into the root directory of apache server for cgi related fields root directory is /var/www/cgi-bin/ and for other purposes root directory of apache will be /var/www/html/.

So after I copied this file I have given executable permissions to this file using chmod command

And then as I normal os, we can start httpd services by using #systemctl start httpd but this will not work inside Docker so for starting httpd services i have used the last command.

Step 5:Then I will build my image using this Dockerfile and the command used for this will be

# docker build -t any_name

For e.g., :

Step 6: After making this image i will run this using command :

#docker run -i -d -t -p any_free_port:port_of_httpd --name any_name image_name

For e.g.,:

Step 7: Now our container is ready to work on. Now I will put my IP address of base os with the port I have given on any browser which is connected to same network