Introduction
Docker is a powerful platform that allows developers to automate the deployment of applications inside lightweight containers. Creating Docker images with a Dockerfile is a common practice that simplifies the process of building and distributing applications. This guide will walk you through the steps to create Docker images using a Dockerfile on Ubuntu 22.04 LTS, which can be effectively hosted on a Windows VPS UK for optimal performance and scalability.
Prerequisites
- An Ubuntu 22.04 LTS server with root access
- Basic knowledge of Linux commands
- Docker installed on your server
Step 1: Update Your System
Begin by updating your package index and upgrading existing packages:
sudo apt update && sudo apt upgrade -y
Step 2: Install Docker
If you haven’t installed Docker yet, you can do so with the following commands:
sudo apt install apt-transport-https ca-certificates curl software-properties-common -y
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
echo "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list
sudo apt update
sudo apt install docker-ce -y
Start Docker and enable it to run on boot:
sudo systemctl start docker
sudo systemctl enable docker
Step 3: Create a Dockerfile
Create a directory for your Docker project:
mkdir ~/mydockerapp
cd ~/mydockerapp
Now, create a file named Dockerfile
:
nano Dockerfile
Add the following basic structure to your Dockerfile:
FROM ubuntu:22.04
MAINTAINER Your Name <your.email@example.com>
RUN apt update && apt install -y \
curl \
vim
CMD ["bash"]
This example sets up an Ubuntu 22.04 base image and installs curl and vim.
Step 4: Build the Docker Image
Use the following command to build the Docker image from your Dockerfile:
sudo docker build -t mydockerapp .
This command will build the image and tag it as mydockerapp
.
Step 5: Verify the Docker Image
To verify that your Docker image was created successfully, run:
sudo docker images
You should see mydockerapp
listed in the output.
Step 6: Run the Docker Container
Run a container based on your newly created image:
sudo docker run -it mydockerapp
This will start a new container and give you an interactive bash shell.
Step 7: Conclusion
You have successfully created a Docker image using a Dockerfile on Ubuntu 22.04 LTS. This method simplifies the deployment of applications and can be easily hosted on a Windows VPS. For additional options, explore various VPS UK Windows solutions, including Windows Virtual Private Server Hosting and Windows VPS Hosting UK for optimal performance.