Lab 2.0: Docker

Summary

This lab was extremely useful for me because I have tried to install Docker before on a fedora server and didn't understand anything at all. So being able to go over it and actually have well formatted steps I can now say I can understand somewhat how to use Docker and Docker-Compose.

Ubuntu Network Configuration

1. Get network adapter name by using ip addr

2. Edit the file /etc/netplan/00-installer-config.yaml

3. Edit the file to look like below without ()

network:
  version: 2
  renderer: networkd
  ethernets:
    (**adapter name**):
     addresses: [(**ip**)/(**subnet**)]
     gateway4: gateway
     nameservers:
       addresses: [(**dns server ip**)]

1. now run sudo netplan apply or sudo netplan try (if unsure) hit Enter when prompted

Making A New Sudo User

• Make a new user with a user directory useradd -m USERNAME

• Make this account an admin sudo usermod -aG sudo USERNAME

Docker Commands

• docker version | check docker version

• docker-comopose --version | check docker-compose version

• sudo usermod -aG docker USERNAME | To add user to docker group

• docker run hello-world | test if docker is working

• docker run --rm PACKAGE:latest | will run the latest version of a package

  • The --rm means the container will automatically be removed when the container is exited

• docker run NAME | run the specific container

  • docker run -d -P | will run container | -d (--detach) means run container in the background and print container ID | -P (–publish-all) means Publish all exposed ports to random ports

• docker stop NAME | stop the specific container

• docker images | lists all local images on the host

• docker ps | lists all running containers

  • docker ps -a | will list all containers even running

• sudo chmod +x /usr/local/bin/docker-compose | allows you to run docker-compose

• docker-compose up | run docker docker-compose.yml file in current directory

• docker-compose down | stop docker docker-compose.yml file in current directory