Software deployment plays a very important role in the success the development of any application. Your application might run fine on your computer, but that doesn't mean that it is really ready for others to use. In order to make your application more user-friendly and to protect it from piracy, you will need to add the required features to your program. Here, we'll make use of one deployment technique, known as the blue/green deployment technique, with Marathon-LB. Blue/green deployment is a technique that uses two identical production environments, called blue and green, to reduce downtime and the risks of running applications at the production stage. At any time, only one of the environments is live, serving all production traffic.

In this chapter, we will cover the following topics:

• Understanding Marathon-LB
• Deploying an Apache web server...