Docker

Docker is a platform that simplifies the creation, deployment, and running of applications using containers.

Docker commands

• build an image

docker build -t image-name .

• To run a docker image to crate a container.

docker run image_name

• To run a docker image to crate a container in detached mode (in the background).

docker run -d image_name

• To do port mapping and runnig container (To access application running inside container port 8080 from our local machine port 5000. By default app inside container cannot talk with outside world)

docker run -p 5000:8080 image-name

or

docker run -p 5000:8080 -d image-name

• Stop a running container

docker stop

eg:- docker stop container_name

• List all local Docker images

docker images

• List all running containers

docker ps

• To see all the containers(even the stopped containers)

docker ps -a

or

docker ps -a

• Remove one or more containers

docker rm container_id

• To remove containers forcely

docker rm container_id -f

• Remove one or more images

docker rmi

eg:- docker rmi image_id

• Pull an image or a repository from a registry like dockerHub

docker pull

eg:- docker pull ubuntu:latest

• To Run a command in a running container

docker exec -it container_name command

eg:- docker exec -it container_name bash

we can use bash or sh or ash

• To list all volume

docker volume ls

• To remove one or more volumes

docker volume rm volume_name

• To remove all unused volume

docker volume prune

Docker compose

Docker Compose is a tool that simplifies the management of multi-container Docker applications through a single YAML configuration file.

Docker compose commands

• Build or rebuild services defined in the docker-compose.yml file

docker-compose build

• List the containers managed by a Docker Compose project

docker-compose ps

• To starts and orchestrates all containers defined in the Docker Compose configuration file

docker-compose up

• To rebuild the images and starts all containers defined in the Docker Compose configuration file.

docker compose up --build

We can also do it in detach mode using -d

docker compose up -d --build

• To stops and removes all containers, networks, volumes, and images created by 'docker-compose up'

docker-compose down

• To shut down the Docker containers defined in a Docker Compose file and remove associated volumes

docker-compose down -v

• To creates or rebuilds Docker images defined in the docker-compose.yml file

docker-compose build

• To Start existing containers for a service

docker-compose start

• TO Stop running containers without removing them

docker-compose stop

• To restarts containers defined in the Docker Compose configuration file

docker-compose restart

• To Run a command in a running container

docker-compose exec

eg:- docker-compose exec service_name command

• To view output from containers

docker-compose logs

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• Command to up or down in development mode

docker compose -f docker-compose.yaml -f docker-compose.dev.yaml up -d

docker compose -f docker-compose.yaml -f docker-compose.dev.yaml down -v

-v deletes anonymous volumes

• Command to up or down in production mode

docker compose -f docker-compose.yaml -f docker-compose.prod.yaml up -d --build

docker compose -f docker-compose.yaml -f docker-compose.prod.yaml down -v

REDIS

commands

docker exec -it 83f7dda4732c sh

redis-cli

PING

KEYS *

GET key_name