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I started learning about Docker. But I keep getting confused often, even though I read it in multiple places.
Docker Host and Docker Container.
Where does the Docker Host come in? Is this another word for Container or another layer where you can keep multiple containers together?
Sorry may be a basic question. I googled this, but no use.
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In Docker, the host is a machine responsible for running one or more containers. Docker network host, also known as Docker host networking, is a networking mode in which a Docker container shares its network namespace with the host machine.
The container host is the system that runs the containerized processes, often simply called containers. This could be, for example, RHEL Atomic Host running in a VM, as an instance in the public cloud, or on bare metal in your data center.
A Docker host is a physical computer system or virtual machine running Linux. This can be your laptop, server or virtual machine in your data center, or computing resource provided by a cloud provider. The component on the host that does the work of building and running containers is the Docker Daemon.
You may think that containers use the same IP address as the host machine but that is not the case. We can test this using a Docker inspect command. docker container inspect and search through the output for the IP address. Instead let's use a format option.
The docker host is the base traditional OS server where the OS and processes are running in normal (non-container) mode. So the OS and processes you start by actually powering on and booting a server (or VM) are the docker host. The processes that start within containers via docker commands are your containers.
To make an analogy: the docker host is the playground, the docker containers are the kids playing around in there.
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Docker Host is the machine that Docker Engine is installed.
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