Now that we have explored the blue deployment technique, let's learn something about the green deployment via an example.

Let's go to our Marathon console, and then type the following command to get the total number of files present:

ls -rlt  

Let's open the nginx.json file using the following commands:

$ sudo cp nginx.json apache.json
$ ls -rlt

Now, let's open the apache.json file using the following command line:

vi apache.json  

In this file, we need to change the image to httpd to create apache.json with HTTP, and save it with :wq!. Then we execute the cat Apache.json command to read the file.

Next we will go ahead and deploy the JSON file to see the results. As you can see in the following screenshot, once you deploy this JSON file, it will slowly and gradually deploy the httpd, and will remove the existing nginx deployment...