Containerization with Docker

• Set network adapter to sys265 LAN

• sudo vi /etc/netplan/00-installer-config.yaml

   network:
      ethernet:
         ens160:
           addresses:
               - <ip adress of machine>
           gateway4: <ip address of dateway>
           nameservers:
              addresses: <[addresse(s) of nameserver(s)/dns>
      version 2
  

• add a user sudo adduser jude
• It prompts for all information give it a password
• sudo usermod -aG sudo jude
• vi /etc/hostname
• update cloud.cfg
• set-hostname docker01-jude
• Make sure to reboot the system
• Go add a A and PTR dns record.
• Disable remote root ssh
  • vi /etc/ssh/sshd_config
  • systemctl restart sshd

Install and Use Docker on Ubuntu 20.04

• sudo apt update
• sudo apt install apt-transport-https ca-certificates curl software-properties-common - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
• sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
• sudo apt update
• apt-cache policy docker-ce
• sudo apt install docker-ce
• sudo systemctl status docker

Executing Docker command without sudo

• sudo usermod -aG docker ${USER}
• su - ${USER}
• id -nG
• sudo usermod -aG docker username

Using the Docker command

• type docker and then double hit tab and then you see everything
• Ex. docker run hello-world

Install and use Docker Compose

• sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
• sudo chmod +x /usr/local/bin/docker-compose
• docker-compose --version - docker run --rm archlinux:latest /bin/echo "hello sys265"
• docker images

Docker Arch Linux Container

• cat /etc/lsb-release
• echo "Current Kernel is:$(uname -a)"
• docker run -it archlinux /bin/unasme -a
• docker run -d -P training/webapp python app.py - docker ps

Docker Networking

• Add 32768 to the firewall
• Then go to docker01-jude:49153
• docker ps
• docker stop nervous higle
• docker ps

Compose and WordPress

• mkdir wordpress
• cd into wordpress
• create file docker-compose.yml

• When all set run docker-compose up -d
• Go to the browser and type in your docker01-jude:80
• And complete the setup

Basic Docker commands

• docker ps
  • basically you can see the services run and what port
• docker stop, start, rm, pause, they are all basic commands and basically do with how you say.
• docker-compose up -d, The -d shorthand stands for - -detach which is used to run a container in background and print container ID. the -P shorthand stands for - - publish-all which means publish all exposed ports to random ports