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Get an idea of the Docker Container.
In todays technology space,it works on my systemis a very common phrase used by developers.
Dockerwas introduced to solve such problems.
Why Docker?
Let me tell you about my personal experience of why Docker is so essential.
We got stuck into several issues while working on this software using multiple technologies.
All of this made life difficult in developing, building, and shipping the software on time.
This is where Docker came into the picture.
It solves all the issues I just mentioned.
What is Docker?
Docker containers are lightweightalternatives to virtual machines, and it uses the host operating system.
You do not have to pre-allocate any RAM in containers, as you do in virtual machines.
To know more about how docker works internally, check out theDocker architecture.
It consists of tool code, libraries, tools, dependencies, etc.
Docker images are read-only immutable files, which are sometimes also called snapshots.
You do not start or run a docker image; you build a container through it.
Docker Hub is a repository of Docker images for almost all technology stacks.
it’s possible for you to pull a docker image from DockerHub and start building containers.
Docker Containers
Docker containers are executable software package that includes all dependencies required to execute an system.
With Docker containers, applications can work efficiently in different computer environments.
Installing Docker
Docker can be easily installed on various Linux platforms, Windows, or macOS.
Check out this post on How to Install Docker on Ubuntu, CentOS, Debian, and Windows.
Also, Docker Desktop is available to Windows and Mac machines.
Docker CE aims at do it yourself approach where DevOps engineers can containerize their applications on their own.
Docker enterprise edition comes with three versions basic,standard,andadvanced.
Mostly techies use Docker for free.
This image contains a simple system to print a hello message from Docker.
Firstly, I need to pull the hello-world docker image on my Ubuntu machine.
Note: this assume Docker is already installed.
If not yet, check out the installation guide.
look to see if the docker image got pulled.
spin up the command below to create a container and execute the system.
Now, list all the docker containers.
you’re free to see the hello-world container ran 1 minute ago.
Start exploring Docker; try out these fundamentaldocker commands.
The command below looks for an Nginx image locally.
Since there is no local image available, it pulls the Nginx docker image from the docker hub.
It then creates a container with the namenginx_geekflareusing the Nginx docker image and runs Nginx on port 80. launch the command below to list all the containers running.
So that one docker image could be used in a different environment.
Code Management: The code travels through a different environment in its journey from development to production.
Each environment is having a slight variation than the other.
Docker eliminates this difference by providing a consistent environment, making the development and coding so much more comfortable.
Running API servers under different containers is a much better way out.
Conclusion
Docker, with its vast benefits, is becoming a valuable addition to the IT infrastructure.
I hope the above gives you an idea about it.
