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“Ahhh Finally! its, completed .” Mark exclaimed. He just completed a web app for the company’s client and it was working fine on his laptop, now the only thing that remains is to deploy this web app so the client can see his work. The deployment team was responsible for ensuring the app was running smoothly on the server. Mark has provided the source code along with a list of requirements to the team so they can deploy it quickly.
The team followed the same steps as mentioned but still, the app was crashing on the server. “Everything is installed as mentioned, still it is not working”, they thought. Hours turned into a day, and a blame game began. Mark blamed the deployment team and the deployment team blamed Mark. The tension was mounting, and the deployment seemed like an impossible task.
Just when everything was at its peak, a senior software developer named Lisa stepped in. She checked and immediately saw the problem the issue was one of the dependencies needed a newer version of node.js but it was not clear in the requirement and the older version was pre-installed on the server which led to the conflict.
Lisa decided to update the Node.js version on the server to match the one required by Mark’s app. It was a quick fix, but Lisa knew that this kind of situation could happen again if they didn’t find a better way.
The Solution?
After the app was successfully delivered, Lisa called a meeting with Mark, the deployment team, and a few other fellow developers. They discussed the recurring problem of different app requirements and server configuration. On that Lisa introduced a game-changing concept. Docker!
What Is Docker?
In simple words docker is a great tool for developers, it helps developers to package their apps with dependencies so that it can run smoothly on every computer. Think of it like a virtual box that contains your app code, metadata, dependencies (like Node.js) with version, and even smallest details like environment variables. It just makes sure it runs smoothly and neatly wherever it goes.
How Does Docker Work?
Here’s a high-level overview:
Docker Image: It is like a snapshot of your code and contains application code, libraries, tools, dependencies, and other files needed to make an application run
Docker Container: It is a running instance of an image. It is where every magic happens, you take your Docker image and put it into a container. It’s like a box that is running your app inside it. Containers are lightweight and can start and stop very quickly.
Benefits Of Using Docker?
Portability: Since your app and all its requirements are inside a container, you can move this container to any server, whether it’s in a data center or in the cloud. Docker makes sure everything your app needs is with it, so it works smoothly.
Isolation: Containers are like little islands. They keep your app separate from other apps and the server itself. This isolation makes sure that your app doesn’t interfere with other apps or get messed up by changes on the server
In simple words, Docker is like your app’s superhero for deployment. It makes sure your app is always in the perfect setup to work its best. Say goodbye to confusion and finger-pointing — Docker makes your apps sail smoothly, Thanks to Docker.
In the next part, we’ll explore some practical uses of Docker and how it simplifies the life of developers even further.
Conclusion
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