Docker and Kubernetes

What is Docker?

• Docker is a tool for running applications in an isolated Enviroment.
• Similar to Virtual Machine
• App run in same enviroment
• Standard for Software Deployment.

⬇️ Install a specific Images.

I am using Nginx but you can choose any there are multiple options like alpine,mongo and many more.

docker run --name nginx -d nginx or docker run postgres:9.6 or docker run nginx:latest

-d : detach mode

🏃‍♂️ Run Docker Container

docker container run --publish 80:80 --detach --name webhost nginx

or

Exposing One Container to Different Ports 🔌:

docker container run -d -p 8080:80 -p 3000:80 nginx:latest

📝 List all Docker Containers

docker container ls -a or docker container ps -a

✔️ Checks logs

docker container logs webhost

✔️ Check Inner Docker Working

docker container top webhost

🔨 Remove Docker Container

docker container rm [Container_Id] or docker rm $(docker ps -aq)

Note: You can specify multiple Container Id to remove multiple Container but you cannot remove a running container due to safety measures.

Container ID looks like : 08gf345hjkmn but you can specify only first three letters of container to remove or to do various operations.

docker container rm 06e 9fd

To remove the running container you can use:

docker container rm -f 06fe

Docker: Volumes

• Allow Sharing of Data,Files and Folder
• Between host and container
• Between containers

docker run --name website -v ${pwd}:/usr/share/nginx/html:ro -d -p 8080:80 nginx

-v : volume

Volume between Container

docker run --name website-copy --volume-from website -d -p 8081:80 nginx

Note: website-copy and website are name of Containers

Dockerfile

FROM python:3.7-buster
COPY . /app
EXPOSE 5000
WORKDIR /app
RUN pip install -r requirements.txt
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "5000"]

Build your Docker Image Using:

docker build --tag website:latest .

This file is the copy of one of my ml project this is the way we create a dockerfile, dockerfile allow us to run all docker commands in one go.