My learning on Docker and some projects using Docker
Docker makes it really easy to run and install applications without worrying about dependencies or setup
Docker is a platform or ecosystem around creating and running containers
Image - a single file with all dependencies and config required to run a program
Container - Instance of an image to run the program. A set of process is isolated and made available for the application
DockerFile - Configuration to define how our container should behave
docker run <image_name> -- starts a container with the provided image
Eg: docker run hello-world
docker run <image_name> <default_command>- override the default command
Eg: docker run busybox ls
docker ps - list running containers
docker ps --all - list all the containers ever created
Docker create <image_name> < default> ---create a container, not started
Eg: docker create busybox ls
Docker start -a <container ID> --- start and print the output(-a)
Eg: docker start -a asfsfsafasfsafaf
docker system prune - delete stopped container, build cache etc
docker logs <container ID> - logs the output of the container.
docker stop <container ID> - stop the container (SIGTERM) stop the process and shuts down container
docker kill <container ID> - stop the conainer using SIGKILL, shut down abruptly
docker exec -it <container ID> <command> - execute additional command in a container
-it Allows us to provide input into the container
Eg: docker exec -it assfasfsf bash
docker run -it busybox sh - directly start shell
docker build . - to build docker image from dockerfile
Base Image - Base OS with preinstall processes