Install Docker in Ubuntu 22.04

install-docker-and-ollama-webui-on-ubuntu.txt

# Step 1 — Installing Docker

# Update and Upgrade ubuntu machine
sudo apt update
sudo apt upgrade

# install a few prerequisite packages which let apt use packages over HTTPS
sudo apt install apt-transport-https ca-certificates curl software-properties-common

# Add the GPG key for the official Docker repository to your system
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

# Add the Docker repository to APT sources
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# Update your existing list of packages again for the addition to be recognized
sudo apt update

# Make sure you are about to install from the Docker repo instead of the default Ubuntu repo
apt-cache policy docker-ce

# Output
docker-ce:
  Installed: (none)
  Candidate: 5:20.10.14~3-0~ubuntu-jammy
  Version table:
     5:20.10.14~3-0~ubuntu-jammy 500
        500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
     5:20.10.13~3-0~ubuntu-jammy 500
        500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Package
        
        

# Finally, install Docker
sudo apt install docker-ce

# Docker should now be installed, the daemon started, and the process enabled to start on boot. Check that it’s running
sudo systemctl status docker

# Output
● docker.service - Docker Application Container Engine
     Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
     Active: active (running) since Fri 2022-04-01 21:30:25 UTC; 22s ago
TriggeredBy: ● docker.socket
       Docs: https://docs.docker.com
   Main PID: 7854 (dockerd)
      Tasks: 7
     Memory: 38.3M
        CPU: 340ms
     CGroup: /system.slice/docker.service
             └─7854 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
             
# Step 2 — Executing the Docker Command Without Sudo (Optional)

# If you want to avoid typing sudo whenever you run the docker command, add your username to the docker group:
sudo usermod -aG docker <username>

# Close the terminal session and login again and run:
docker

# Step 3 - Installing Ollama

## If Ollama is on your computer, use this command:
docker run -d -p 3000:8080 --add-host=host.docker.internal:host-gateway -v open-webui:/app/backend/data --name open-webui --restart always ghcr.io/open-webui/open-webui:main

## If not, run this bundle command (for CPU)
docker run -d -p 3000:8080 -v ollama:/root/.ollama -v open-webui:/app/backend/data --name open-webui --restart always ghcr.io/open-webui/open-webui:ollama