DOCKER
one service/app per container
Container Registry
image is an template to run containers
Official (default public registry): Docker Hub
Store Container Images
3rd party registries also exists (Amazon has its own AWS Container Registry)
hub.docker.com/explore
HOW THEY WORKS?
find a Docker host
pull down (download) an image (for example MongoDB)
installation
windows
pre-reqs
WIndows 10
64 bit
Clean install
make sure you have Hyper-V checked in in Control Panel -> Programs and Features -> Windows Features
Download installer
install
type: docker version
commands
docker run hello-world (hey docker run a new container basing on hello-world image)
🚩 all docker commands starts with "docker"
docker ps: see if there are any containers running
docker ps -a: shows all containers that were running (see STATUS column)
docker info: general info about all containers and images
docker images: see all images
where I can host?
Aamost everywhere, Linux, Windows, Mac, Cloud etc
installing Docker gives you Client and Deamon on the same host
😃mental shortcut:😃
Images ~ Stopped containers
Containers ~ Running Images
docker pull <image_name>: download image from Docker Hub manually
Repository contains images, for example if we pull from Docker Hub ubuntu, and ubuntu:14.04. version in Repo we will have two versions with different TAGs (latest and 14.0.4)
docker rmi <image-name>: delete image
container lifecycle
commands
docker start <container>
docker stop <container>
docker rm <container>