Chapter summary
In this chapter, you learned that we used to deploy one application per physical server. This was wasteful of capital, servers, and environmental resources. It also caused long delays in application rollouts while new servers had to be procured, delivered, and installed. VMware came along and let us run multiple applications per physical server. It reduced capital expenditure and allowed more efficient use of server and environmental resources. It also allowed us to ship applications a lot faster by deploying them to virtual machines on servers we already owned.
Containers are also a form of virtualisation. They virtualise at the operating system layer and each container is a virtual operating system. Containers are faster and more efficient than virtual machines, however, out-of-the-box they’re usually less secure. The advantages of containers made it possible for us to re-think the way we develop, deploy, and manage applications.
A major innovation, enabled...
