What is Docker!?👩‍💻 (in 30 seconds) #technology #programming #software #career #tech #code
Published May 12, 2023, 10:08 a.m. by Monica Louis
What is Docker?
Docker is a tool that enables developers to create, deploy, and run applications inside of containers. Containers are isolated from one another and allow developers to package up an application with all of the dependencies it needs, making it easy to run on any machine.
Docker is popular because it makes it easy to create, deploy, and run applications in a consistent environment, regardless of the underlying infrastructure. This makes it ideal for use in hybrid and cloud environments.
Docker containers are lightweight and fast, making them perfect for microservices and distributed applications.
How Does Docker Work?
Docker uses a client-server architecture. The Docker client communicates with the Docker daemon, which does the heavy lifting of building, running, and distributing containers.
The Docker daemon runs on a host machine and is responsible for all the containers running on that host. The Docker client can run on the same host as the daemon or can connect to a remote daemon.
Docker containers are built from images. Images are read-only templates that are used to create containers. Images can be created from scratch or can be based on existing images.
When you run a container, the Docker daemon fetches the image and creates a new container from it. The container is then run in an isolated environment on the host machine.
Docker Hub
Docker Hub is a public repository for images. It is similar to GitHub, but for Docker images. Docker Hub is the default registry where images are pushed and pulled.
Docker Hub has a free and paid subscription plan. With a free plan, you can push and pull unlimited public images. With a paid plan, you can push and pull unlimited private images.
Docker Hub also provides a web interface where you can manage your images and containers.
Why Use Docker?
Docker is popular because it makes it easy to create, deploy, and run applications in a consistent environment, regardless of the underlying infrastructure. This makes it ideal for use in hybrid and cloud environments.
Docker containers are lightweight and fast, making them perfect for microservices and distributed applications.
Docker also has a large and active community. There are many images available on Docker Hub, and you can easily find help and support online.
You may also like to read about:
what is docker and what do you use it
for have you ever had the problem that
your app works on your machine but not
another machine virtual machines solve
this by replicating your machine
but each virtual machine is really slow
because it has an os built in each one
docker uses something called containers
to isolate everything at the os level so
that all of your containers can share an
os and be much faster and disposable
using a docker file it's easy to spin up
a container fast and you can find a huge
ecosystem of existing services and apps
use docker if you want your apps to be
scalable reliable and performant
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