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docker cheat sheet

Docker Cheat Sheet

Login to custom/private repository

REPOSITORY_URL=<repo url like artifactory.shivamanand.com>
REPOSITORY_USERNAME=<username>
REPOSITORY_PASSWORD=<password or token>

docker login $REPOSITORY_URL --username $REPOSITORY_USERNAME --password $REPOSITORY_PASSWORD

Login to dockerhub

REPOSITORY_USERNAME=<username>
REPOSITORY_PASSWORD=<password or token>

docker login --username $REPOSITORY_USERNAME --password $REPOSITORY_PASSWORD

Docker pull image

public image from docker hub 

docker pull anandshivam44/flask-hello-world:v1
private image 
# For private repo docker login before
docker pull artifactory.shivamanand.com/docker-release/image/path/python312:v1

List docker images and running containers

# Get all Images
docker images
# Get all containers
docker ps -a

Docker run images - multiple ways to run a docker container

# Run a container - simple
docker run -it ubuntu:latest
# Run a container and SSH into it.
docker run -it ubuntu:latest /bin/bash

# Docker port binding
HOST_PORT=80
CONTAINER_PORT=5000
docker run -p $HOST_PORT:$CONTAINER_PORT flask-hello-world:v1

# Docker multiple port binding
docker run  -p 80:5000 -p 8080:8080 -p 443:443 crud-flask:v1

# Multiple Vars
docker run \
--detach \
--name=[container_name] \
--env="MYSQL_ROOT_PASSWORD=[my_password]" \
--publish 6603:3306 \
--volume=/root/docker/[container_name]/conf.d:/etc/mysql/conf.d \
mysql

# Use host network, helps with port mappings
docker run --network="host"  -it stream-purchase-processor

Docker Build

# Clones a public github repo and builds Dockerfile from the root of 
docker build github.com/anandshivam44/flask-hello-world

# Docker Build with an image name
docker build -t myimage:latest .

# Docker Build from a file
docker build -f Dockerfile.dev -t myimage:dev .
# Docker Build and pass arguments/parameters
docker build --build-arg APP_VERSION=1.0 -t myimage:latest .

Docker push to repository

# tag image (optional)
docker image tag my-app:latest johndoe/my-app:latest

#Push image (login madatory)
docker push johndoe/my-app:latest

Docker login, commit and push a running image

docker login
sudo docker commit CONTAINER_HASH anandshivam44/flask-hello-world:v1
docker push anandshivam44/flask-hello-world:v1

Run docker without sudo

sudo groupadd docker
sudo gpasswd -a $USER docker
newgrp docker
or 
sudo groupadd docker # create group
sudo usermod -aG docker ${USER} # add currrent user

Docker Daemon

# start Docker
sudo service docker start
# Check Docker status
sudo service docker status

Docker Init - Quickly create Dockerfile

docker init

Delete all images and running containers

# Remove all Docker containers locally
docker rm -vf $(docker ps -a -q)
# Remove all Docker Images locally
docker rmi -f $(docker images -a -q)

SSH

docker exec -it [container_name] bash

Docker Compose

docker-compose build
docker-compose up -d

Get Internal IP of the Docker Container

INTERNAL_IP=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' docker_ssh)
echo $INTERNAL_IP

Docker Container Logs

docker logs container_name

To check the location of the volumes

docker inspect [container_name]