Day 16 Task: Docker for DevOps Engineers

Docker is a software platform that allows you to build, test, and deploy applications quickly. Docker packages software into standardized units called containers that have everything the software needs to run, including libraries, system tools, code, and runtime. Using Docker, you can quickly deploy and scale applications into any environment and know your code will run.

TASKS

1. Run a New Container

• Question: How do you use Docker to pull and run the hello-world container to ensure Docker is properly set up?

• Command:

    docker run hello-world
  

2. Inspect a Container or Image

• Question: How can you retrieve detailed information (like configuration, environment variables, volumes) about a specific Docker container or image using Docker commands?

• Command:

    docker inspect <container_id_or_image_name>
  

3. List the Port Mappings for a Container

• Question: Which Docker command allows you to see the port mappings (container to host) for a running container?

• Command:

    docker port <container_id_or_name>
  

4. View Resource Usage Statistics for Containers

• Question: How can you monitor resource usage (such as CPU, memory, and network I/O) for all or specific Docker containers in real time?

• Command:

    docker stats
  

5. View Processes Running Inside a Container

• Question: Which command shows the list of active processes running inside a Docker container, similar to the top command on Linux?

• Command:

    docker top <container_id_or_name>
  

6. Save an Image to a Tar Archive

• Question: How can you export a Docker image as a .tar archive file for backup or sharing purposes?

• Command:

    docker save -o <output_file.tar> <image_name>
  

7. Load an Image from a Tar Archive

• Question: If you have a Docker image saved in a .tar archive, how can you load it back into Docker?

• Command:

    docker load -i <input_file.tar>
  

#HappyLearning 😇