Docker Training

Installation

Docker

https://docs.docker.com/get-docker/

or

https://orbstack.dev/download

Docker Compose

https://docs.docker.com/compose/install/

---

Download images which we will use at training

./pull-images.sh

Cheatsheet

Docker

• docker system prune - delete unused data
• docker pull <image> - download image
• docker image ls - list all images
• docker image rm <image> - remove image
• docker build -t <image-name> <path-to-dockerfile> - build image
• docker run <image> - execute image as container
• docker ps - list of containers
• docker kill <container-hash/name>
• docker kill $(docker ps -q) - kill all running containers
• docker rm <container> - remove container
• docker exec -it <container> <command> - connect to running container and run command
• docker logs -f <container> - show logs from container
• docker system df - show size of images, containers and volumes
• docker system prune (--all, --volumes) - cleanup containers, images

Docker Compose

• docker-compose ps - list of containers in project
• docker-compose up - start stack
• docker-compose stop - stop stack
• docker-compose down - stop stack and delete containers
• docker-compose exec <container> <command> - connect to running container in stack and run command
• docker-compose logs -f <container> - show logs from container

HTTPS

Mkcert

This tool create valid certificate for your localhost

How to install Mkcert

https://github.com/FiloSottile/mkcert#installation

After instalation

For the first time, you must run an authority installation command mkcert -install

Certificate generator

1. Create directory ~/nginx-proxy/certs/ and cd ~/nginx-proxy/certs/
2. Create certificate and key for nginx-proxy mkcert --cert-file=example.cz.test.crt --key-file=example.cz.test.key example.cz.test
3. Add volume and port mapping to nginx-proxy service

services:
  nginx-proxy:
    ports:
      - 443:443
    volumes:
      - ~/nginx-proxy/certs:/etc/nginx/certs

For valid certificate, you must generate a certificate for each web separately.

Docker Machine

export DOCKER_HOST=ssh://root@<ip-your-machine>
docker info