A Docker container contains all the binaries and dependencies required to run an application. A user only needs to run a Docker container to start and access an application. The CoreOS Linux operating system has Docker installed and the Docker commands may be run without even installing Docker.
A Docker container, by default, is started only on a single node. However, for production environments, where uptime and redundancy matters, you need to run your applications on multiple hosts.
When a Docker container is started using the docker run command, the container ...