docker

runing as host

docker run --rm -ti --network host -v $PWD/work:/work parrotsec/security

Get rid of all running containers

docker rm -f $(docker ps -a -q)

ENTRYPOINT vs CMD

• Use ENTRYPOINT to define the main command that should always run.
• Use CMD to provide default arguments or commands that can be overridden.

#Example
FROM ubuntu:latest

# Set the entry point
ENTRYPOINT ["python3", "app.py"]

# Set default arguments
CMD ["--help"]

Docker logging

• Basic options
• –tail
• –head
• –since
• –until
• –follow

Checking the driver

This logs are stored in /var/lib/docker/containers/

• U can check them by

docker info --format '{{.LoggingDriver}}'

• In a particular container

docker inspect -f '{{.HostConfig.LogConfig.Type}}' <container_id>

[!Note]- Login drivers list Docs

Creating a driver

[!example] Example file

Changing the driver

• –log-driver

docker run --log-driver local --log-opt max-size: 50m -p 80:80/tcp -d "betterstackcommunity/nginx-helloworld:latest"

[!bug] Log rotation isn’t set by default in json driver

Docker Network

[[Docker Netwroks.canvas|Docker Netwroks]]

Exposing vs publishing ports

• Exposing a port
  • letting others know on which port the container is going to be listening on
    • This is for communicating with other containers, not with the outside world.

docker container run \
    --expose 80 \
    --expose 90 \
    --expose 70/udp \
    -d --name port-expose busybox:latest sleep 1d

• Publishing ports
  • Mapping the ports of the container with the host

-p [optional_host_ip]:[host_port]:[container_port]/[optional_protocol]

docker container run --rm --name nginx \
    -p 80:127.0.0.1:8081/tcp -d nginx

Multi-stage docker images

Attach to the container

docker exec -it (container id ) /bin/sh(or bash if installed)

Docker compose

This file can be either yaml or json

• version (need to checuotu the last complibit version)
  • It has to be a string!
• servives are whats beeing run
  • 
  • u can also define ports with ports ## commands
• To start the server use docker-compose up
• To end the app type **docker compose down **
• Auto-reload

---

• cloud-int
• [podman]({{\< ref “posts/Linux/Docker/podman.md”>}})