shubhamkalsait / cdec-b19

desc

Docker

Docker Installation on Ubuntu

ref: https://docs.docker.com/engine/install/ubuntu/

Docker Commands

######### WORK WITH CONTAINERS #############
docker run <docker-image>   # Run docker container
docker run -d <docker-image>    # run docker container in dettached way
docker ps   # to list running containers
docker ps -a    # to list all containers
docker inspect <container_id>   # get detailed info about container
docker run -d -p <host-port>:<container-port> <docker-image>    # map host machine port to container port to expose application on host machine
docker run -it <docker-image> bash  # to access new container terminal 
docker exec -it <container-id> bash     # to access running container terminal
docker exec -it <container-id> <command>    # to execute command inside the container
docker cp <source> <destination>    # to copy file from host machine to container OR conrainer to host machine OR container to container
docker run -d --name <container-name> <docker-image>    # to run container with name
docker run -d -P nginx  # to map container port on random host machine port range from 32768.
docker create <docker-image>    # to create the container
docker start <container-id>     # to start the container
docker stop <container-id>      # to stop the container
docker rm <container-id>    # to remove the stoped container
docker rm -f <container-id>    # to remove the container forcefully
docker logs <container-id>  # check docker logs
docker container stats      # to see container resources utlization
docker rm -f `docker ps -aq`   # to remove all containers

########### WORKING WITH CONTAINER IMAGES ###########
docker images   # to list docker images
docker image list   # to list docker images
docker pull <IMAGE-NAME>    # to pull docker image
docker rmi <image-name>     # to remove docker unused image. use -f for forcefully.
docker image rm <image-name>    # to remove docker unused image. use -f for forcefully.
docker commit <container-id>    # to save changes from container to new image
docker tag <image-id> <new-image-name>  # to rename the image
docker login    # to authenticate in docker hub
docker push <repo-name>     # push image in registry
docker save -o <file-name>.<tar/zip> <image-id>     # archive image
docker load -i <file-name>              # extract image from archive

Docker Network Drivers

ref: https://docs.docker.com/network/drivers/

docker network list     # to list the network
docker network create --drive=<driver> --subnet=<subnet-cidr> <network-name>    # to create docker network
docker run --network=<network-name> <image-name>    # to run container in specific network
docker network rm <network-name>    # to remove the network

Docker Volume

docker volume list      # to list volumes
docker volume create <vol-name>     # to create volume
docker run -v <vol-name>:<mount-path> <image>   # to run container with volume

Deploy three tier Application using Docker

• step1: Deploy DB container
  • docker volume create studentapp-vol
  • docker run -d -v studentapp-vol:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=redhat mysql
  • docker exec -it mysql bash [mysql create database studentapp;] [create_schema]
• step2: Deploy backend container
  • configure context.xml
  • update dockerfile
  • build backend image
  • docker run -d -p 8080:8080 backend:latest
• step3: Deploy frontend container
  • configure index.html (update backend url)
  • build frontend image
  • docker run -d -p 80:80 frontend:latest