Docker is a software container platform. System administrators use Docker to run and manage apps side-by-side in isolated containers to get better compute density. Companies use Docker to build agile software delivery pipelines to ship new features faster, more securely and with confidence for both Linux and Windows Server. Developers use Docker to eliminate “works on my machine” problems when collaborating on code with co-workers.
What is a Container?
Using containers, everything required to make a piece of software run is packaged into isolated containers. Unlike VMs, containers do not bundle a full operating system - only libraries and settings required to make the software work are needed. This makes for efficient, lightweight, self-contained systems and guarantees that software will always run the same, regardless of where it’s deployed.
Additionally, in both cases that environment is represented as a binary artifact that can be moved between hosts. There may be other similarities, but these are the two biggest.
Docker Datacenter on Docker Engine includes service discovery and load balancing capabilities to aid the devops initiatives across any organization. Service discovery and load balancing make it easy for developers to create applications that can dynamically discover each other. Also, these features simplify the scaling of applications by operations engineers.
Docker Datacenter allow network and sysadmins to provide secure, scalable, and highly efficient network internally and externally through Service Discovery and Load Balancing. Service discovery is an integral part of any distributed system and service-oriented architecture. As applications are increasingly moving towards microservices and service-oriented architectures, the operational complexity of these environments can increase. Service discovery will register the service and publish its connectivity information so that other services are aware of how to connect to the service.
Internal DNS server: