Docker Notes

####Docker Process Management####

# Show all running docker containers
docker ps

# Show all docker containers
docker ps -a

# Run a container
docker run <image>:<tag>

# Run a container and connect to it
docker run -it <image>:<tag>

# Run a container in the background
docker run -d <image>:<tag>

# Stop a container
docker stop <container>

# Kill a container
docker kill <container>

####Docker Images and Repositories####
# List available local images
docker images

# Search for docker images
docker search <image>

# Pull a docker image
docker pull <image>

# Build an image with a dockerfile
docker build -t <image>:<tag> <run_directory> -f <dockerfile>

# Login to a remote repository
docker login <repository>

# Push an image to your remotee repository
docker push <image>:<tag>

# Remove a local docker image
docker rmi <image>:<tag>

# Show metadata for an image
docker inspect <image>

# Remove all unused docker images
docker image prune

# List volumes
docker volume ls

# Create a volume
docker volume create <volume>

# Delete a volume
docker volume rm <volume>

# Show volume metadata
docker volume inspect <volume>

# Delete all volumes not attached to a container
docker volume prune

# Mount a local directory to your container
docker run -v <local_dir>:<container_dir> <image>

# Copy file or folder from a docker container to host machine
docker cp <container>:<container_dir> <local_dir>

# Copy file or folder from local machine onto a container
docker cp <local_dir> <container>:<container_dir>

# Map a local port to a docker instance
docker run -d -p 127.0.0.1:<local_port>:<docker_port> <image>

# List the ports a docker container is running on
docker port <container>


####Docker Troubleshooting####
# Show the logs of a container
docker logs <container>

# Follow/tail the logs of a container
docker logs -f <container>

# Show timestamps on docker logs
docker logs -t <container>

# Show details/metadata of a container
docker inspect <container>

# Show a 'top' view of processes running on a container
docker top <container>

# Show a 'top' view of all docker containers
docker stats

# Show any files that have changed since startup
docker diff <container>

# Connect to an already running container
docker attach <container>

# Execute a command on a container
docker exec -it <container_id> /bin/bash

# Show docker system wide information
docker system info

# Show docker disk space used
docker system df


####Docker Compose####
# Start your docker-compose defined resources in detached mode
docker-compose up -d -f <docker_compose_yaml>

# Stop all docker-compose resources
docker-compose stop

# Destroy all docker-compose resources
docker-compose down

# Show docker-compose processes
docker-compose ps

# Show docker-compose logs
docker-compose logs

# Show docker-compose resource consumption
docker-compose top


####Personal Notes from Warp9 #####

#Build image from dockerfile
docker build . -t myfirstimage:1
#Run the build image
docker run myfirstimage:1

# run container myweb:1 with port 8080:80 open (in attached mode)
docker run -p 8080:80 myweb:1

#Copy VS ADD in Dockerfile:
#Copy copies local files into image
# Add can copy source from remote url (not reccomended instead use curl) and also it can decompress .tar file into image

# RUN vs CMD vs ENTRYPOINT
#RUN: executes when building the image (for example echo , curl ,dependancies )
# CMD and ENTRYPOINT : execute when the container starts
#Blog post that goes into details on the differences between RUN, CMD and ENTRYPOINT: https://aboullaite.me/dockerfile-run-vs-cmd-vs-entrypoint/

# Runs myweb image on random port
docker run -d -P myweb:4


#Docker Documentation for Building Images: https://docs.docker.com/engine/reference/commandline/build/#specify-a-dockerfile--f
# build a docker image with custom dockerfile name
docker build -f Dockerfile.prod . -t custom:1
#Build with URL and tag with custom image name
docker build https://github.com/linuxserver/docker-dokuwiki.git -t mydokuwiki-img:1

#Prune docker system and remove all containers, images, volumes with one command.
docker system prune
docker container stop $(docker container ls -aq)
docker container rm $(docker container ls -aq)
docker rmi $(docker images -aq)
docker volume prune


#run container in detached mode and name the container
docker container run -d -p 8080:80 --name=mywebserv httpd:2.4


#Docker Documentation for Volume Mounts: https://docs.docker.com/storage/bind-mounts/#choose-the--v-or---mount-flag
#run container with volume mount inside apache webserver container
docker container run -p 8080:80 -v /mnt/d/Docker-code/website:/usr/local/apache2/htdocs httpd:2.4

#Rename a image myweb:1 to mywebserver:latest
docker tag myweb:1 mywebserver:latest

connect to container via Bash
docker container exec -it a85613688203 /bin/bash


#Get information about the image
docker image inspect

#Make image smaller
docker export 013fc6638345 > ./export.tar
cat export.tar| docker import - layers:3



#GitHub Respository for the Docker Multistage Image Example: https://github.com/katherinelim/docker-multistage-example
#Here's a link to the Docker documentation for multistage images: https://docs.docker.com/develop/develop-images/multistage-build/