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Home Cloud

Demystifying Serverless Computing: Understanding And Building Serverless Architectures

Paul Balo by Paul Balo
June 28, 2023
in Cloud, Research/How to do it
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3.2 Docker Fundamentals

Let’s delve into the fundamental concepts of Docker, a powerful tool for containerization. Follow these steps to get started:

  • Installing Docker: Begin by installing Docker on your machine. Docker provides installation packages for various operating systems, including Windows, macOS, and Linux. Visit the official Docker website and follow the installation instructions specific to your operating system.
  • Building and Running Containers: Once Docker is installed, you can start building and running containers. Containers are lightweight, isolated environments that encapsulate an application and its dependencies. Use the Docker CLI to build a container by defining a Dockerfile, which contains instructions to assemble the container’s image. Run the container using the docker run command, specifying the image name.
  • Dockerfile and Container Orchestration: Dockerfile is a text file that contains a set of instructions for building a Docker image. It allows you to define the environment, dependencies, and configurations required for your application. Learn the syntax and structure of Dockerfile, and explore various instructions such as FROM, RUN, COPY, and CMD. Additionally, familiarize yourself with container orchestration tools like Docker Compose and Kubernetes, which enable managing and scaling containers in a clustered environment.

Here are some command line tips you can copy and paste to execute Docker commands:

  • Installing Docker:
    • Windows: choco install docker-desktop
    • macOS: brew install docker
    • Linux (Ubuntu): sudo apt-get install docker-ce
  • Building a Docker Image:
    • docker build -t my-image-name:tag .
  • Running a Docker Container:
    • docker run -d --name my-container -p 8080:80 my-image-name:tag

 

3.3 Containerizing Applications

Now that you have a grasp of Docker fundamentals, let’s explore containerizing applications. Follow these steps to package and deploy your applications as containers:

  • Packaging Applications as Containers: Start by defining the necessary dependencies and configurations for your application in a Dockerfile. Then, build the Docker image using the Docker CLI. Ensure that your application is container-ready by considering factors such as port configurations and environment variables.
  • Managing Container Images and Repositories: Docker allows you to manage container images and repositories efficiently. Use the Docker CLI to push your images to container registries like Docker Hub or private repositories. You can also pull images from existing repositories and manage their versions.

Command Line Tips for Managing Containers:

  • Pushing an Image to Docker Hub:
    • docker tag my-image-name:tag username/repository:tag
    • docker push username/repository:tag
  • Pulling an Image from Docker Hub:
    • docker pull username/repository:tag
  • Listing Running Containers:
    • docker ps
  • Stopping a Container:
    • docker stop container-id


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Tags: cloud computinglearningserverless comptuingtutorial
Paul Balo

Paul Balo

Paul Balo is the founder of TechBooky and a highly skilled wireless communications professional with a strong background in cloud computing, offering extensive experience in designing, implementing, and managing wireless communication systems.

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