With the many advances in web development technology, keeping up with all the changes can be hard.
However, you should not miss out on one game-changer, as it has many use cases that can help extend your site’s functionality and accessibility.
What is this magical thing? It’s no magic, but Docker containers can do great things if used properly.
From simple static sites to full-stack web applications, Docker can help host and deploy applications by allowing you to package an isolated environment into a lightweight and portable container that can run in virtually any environment.
Dockers can provide several advantages. They are also relatively easy to implement and maintain on your site, and migrating and updating are easier than ever.
However, getting started, especially with zero experience, can be complicated. We are happy to provide you with everything you need to know about hosting a Docker container website in just a few easy steps.
- What is a Docker Container?
- Benefits of Docker Containers in a Website
- How to Host a Docker Container Website
What Is a Docker Container?
A docker container is a standalone, lightweight, and executable unit isolated at the process level from the host’s operating system. It contains everything that the package requires, such as the code, runtime, libraries, settings, and other elements, for it to run properly within its own environment.
Dockers separate themselves from virtual machines as they do not require their own separate OS. They are also more efficient and load faster than virtual machines.
Running as an image of your container, dockers can have multiple independent instances. This allows for consistent performance, regardless of which browsers are used or which operating systems are running.
This removes instances of certain features not functioning as intended in other machines and ensures consistent appearance and behavior across all platforms and conditions.
As such, Docker containers have now become one of the more popular options for DevOps practices. They are widely utilized in the deployment of anything from web apps to APIs and even full-stack sites.
Benefits of Docker Containers in a Website
Due to their nature, Docker containers offer several benefits, especially compared to traditional hosting methods. These advantages are important not just for developers, though, as Docker containers can benefit users as well.
1. Consistency Across Environments
The biggest advantage of Docker containers is that your site will be consistent across all platforms. Consistency is prevalent, especially when performance differs between the development and production phases.
Using Docker containers ensures that your site runs the same way with the configurations you chose, anywhere and in any condition, making compatibility an issue.
2. Easy Deployment and Scaling
Containers can be easily deployed. They are also lightweight and can be supported by local machines, cloud servers, and systems like Kubernetes.
When it comes to scaling, minimal configuration is required, and more containers can be added without complicated scripts.
3. Simplified Updates and Rollbacks
Updates or rollbacks are made easier when using Docker containers. As they exist in an isolated environment, considering other browsers or operating systems is no longer important. Also, there is no downtime required.
When performing updates, simply replace an old container with the latest version. Likewise, rollbacks will require replacing the current version with the most stable build.
4. Isolation and Security
Running in an isolated environment has advantages. Docker containers reduce the risk of conflicts between applications, browsers, and operating systems, and their isolated nature also makes them more secure.
This makes hosting multiple websites or services on a single server more risk-free, as interference with each other would be minimized.
5. Resource Efficiency
Compared to virtual machines, Docker containers consume fewer resources and share the host system’s kernel. This enables these units to perform faster and use fewer resources, conditions ideal for services that need to be fast and responsive.
Dockers, as such, can be considered a more efficient way of achieving the benefits of virtual machines without complicated hosting or setup concerns and with a higher rate of productivity.
How to Host a Docker Container Website
Prerequisites
Before you can host a Docker container website, you need to be prepared, both in terms of technical knowledge and some tools and software required for the platform to work effectively.
Regarding actual skills, familiarity with the command line and how web servers work is important. This entails navigating directories, running commands, and editing configuration files.
Of course, experience in web development or DevOps is a huge plus. However, for those just starting, starting out with Nginx or Node.js can give you an idea of the basics necessary to create your first Docker website.
As for software, the following are required to host a Docker container website.
Docker – this can be installed on your local machine using Docker Desktop or, for Linux, directly via terminal.
Text Editor – VS Code, Sublime Text, or Notepad++ work best.
Your Website Project—This can be as simple as a static HTML site with CSS or a dynamic app with plugins and other dependencies required for it to run.
Optional but helpful software includes:
A GitHub account for version-controlled projects.
A cloud server that supports Docker, like AWS EC2, Linode, or DigitalOcean
A custom domain name for deployment and configuration
Step 1: Prepare Your Website for Docker
Hosting a Docker container website requires that your website files be organized properly. This means having a clear directory structure and having all necessary files in one place.
This is necessary to ensure the Docker container image can be built efficiently.
Before creating a Docker container, it’s important to organize your website files properly. Docker needs a clear directory structure and all the necessary files in one place to build an efficient container image.
Your dedicated folder must include your main website files, index.html, CSS files, and scripts. It must also include your images, font, and other elements, as well as configuration and dependency files such as package.json or requirements.txt files.
Before proceeding with the next step, make sure that the folder can run outside of Docker when executed. Check for issues such as broken links or missing assets. This ensures a clean and 100% functional base project before the container build.
Once confirmed, add a .dockerignore file. This tells Docker which files to exclude. Typical files in this category include node_modules, .git, and log files.
Step 2: Create a Dockerfile
The next step in hosting a Docker container website is to create the Dockerfile. The Dockerfile is a script that gives instructions on how to build the site’s container image.
The Dockerfile is a line-by-line set of instructions for Docker to build a working container.
An example of a Dockerfile using Nginx for a static website will look like this:
# Use official Nginx base image
FROM nginx:alpine
# Copy website files into Nginx’s web root
COPY . /usr/share/nginx/html
# Expose port 80 for web traffic
EXPOSE 80
# Start Nginx server
CMD [“nginx”, “-g”, “daemon off;”]
This file should be saved as a “Dockerfile” and placed at the root of your project directory. Once run, it will copy your files to their respective directory folders, expose port 80, and start the server.
Once this file is ready, we can build the actual Docker image.
Step 3: Build the Docker Image
The Docker image is a snapshot of your website’s environment. This includes the operating system, server software, dependencies, elements, and other files your website needs to run.
The build command, which you would need to input using the terminal, is as follows. This should be run once you navigate to your project directory:
docker build -t my-website .
Change my-website to the website name of your choosing.
Once run, Docker will create the Docker image. Output logs will be displayed line by line so that you can see the progress.
You may verify if the image has been built correctly by inputting the following:
docker images
If you look at your website name, its size, and the time it takes to create it, you will see that the build has succeeded.
Double-check your Dockerfile if you have encountered any errors. If there are none, then you can proceed to the next step.
Step 4: Run the Docker Container
Once the image has been built, you must run your Docker container so your site can go live locally.
To open your Docker Container, run this command in your terminal:
docker run -d -p 80:80 my-website
My-website refers to the website name that you used during the build.
-d pertains to detached mode, meaning your Docker container will run in the background.
If the code runs successfully, you can already access your Docker container website through your browser. To do so, use the address http://localhost.
Ensure that nothing is using your machine’s port 80 by double-checking port mappings if there are any problems.
To confirm that the Docker container is running, use the following command in the terminal:
docker ps
Once run, the terminal will show active containers and details such as their name, port used, and uptime.
Step 5: Optional – Use Docker Compose for Complex Projects
For more complex projects, such as those with backend APIs, databases, or web services, you must use Docker Compose to manage all these elements cleanly.
Docker Compose is a tool that lets users define and run multi-container applications. This can be done through a YAML file. This file enables you to group multiple containers so that they can be launched with a single command.
For example, a Node.js backend running a MongoDB database can have a docker-compose.yml file which would essentially look like this:
version: ‘3’
services:
web:
build: .
ports:
– “80:80”
db:
image: mongo
volumes:
– data:/data/db
volumes:
data:
This setup builds a web container, pulls an image of the database, and creates a persistent volume. This can now be run using the command docker-compose up -d, which would boot everything together.
Step 6: Deploy to a Cloud Server
Once your website runs perfectly on the local server, it is time to make it publicly accessible. This can be done by deploying your project to a cloud server, which allows your site to be accessible via the Internet.
Popular hosting providers that can host Docker container websites include DigitalOcean, Amazon EC2, Google Cloud Platform, and Linode.
You can purchase a basic virtual server running Linux for a start. However, depending on your preferences and needs, your choice is entirely up to you.
Once you have a server set up, use SSH and install Docker. Use this command on Linux to do this:
sudo apt update
sudo apt install docker.io
sudo systemctl enable docker
sudo systemctl start docker
You can then transfer your files or use Docker Hub. For the former, you may utilize scp, Git, or FTP. For the latter, you can transfer files using these commands:
docker tag my-website yourdockerhub/my-website
docker push yourdockerhub/my-website
To pull these files to the server, run these commands.
docker pull yourdockerhub/my-website
docker run -d -p 80:80 yourdockerhub/my-website
Once done, your site should be live and accessible via the server’s IP address on the Internet.
Step 7: Point a Domain to Your Website
You must acquire a custom domain unless you want users to access your cloud server directly. This would provide users with an address that will grant access to your site and make it easier to find.
You may purchase domains through sites such as Namecheap, Google Domains, or GoDaddy. Get a domain name that describes your company well so that it is easier to remember.
Once you have your domain, access its DNS management settings to point the DNS to your server. You can do this by logging on to your domain’s registrar and inputting the public IP address of your cloud server in the A record.
Take note that changes may take up to 24 hours to propagate.
For added security, secure your site with HTTPS. Some domains issue free SSL certificates. This ensures secure data trans transmissions between your server and users’ browsers.
Getting a custom domain will ensure that your Docker container website looks professional and will add security.
Step 8: Monitoring and Maintenance
Of course, your Docker container website will still need regular monitoring and maintenance. This will ensure that it continues to run smoothly, efficiently, and securely.
To restart containers, which may be needed for updates, reboots, or crashes, use the following command:
docker restart <container_name_or_id>
You can also automate this process by adding a restart policy. This way, you would no longer need to manually restart containers in case of failures, crashes, or when the system reboots.
To update, such as adding or changing elements or fixing bugs, you need to rebuild and redeploy the container. Fortunately, this is a very easy task.
Simply run this in your terminal:
docker build -t my-website . docker stop <old_container> docker rm<old_container> docker run -d -p 80:80 my-website
This will refresh your container and apply the latest changes, ensuring that the Docker container is up to date and running the latest version. This also applies to rollbacks.
You can also use the following commands to view logs and to diagnose issues.
To view logs, input the following command.
docker logs <container_name>
You can inspect your environment by attaching to a running container through this command:
docker exec-it <container_name> /bin/sh
In addition to these tasks, you would also need to ensure that your Docker is always up-to-date and secure. This entails following standard practices such as using firewalls, limiting access to authorized personnel, and regularly scanning for vulnerabilities using tools such as Docker Scout or Snyk.
Conclusion
Hosting a website using Docker containers is the best approach to modern, efficient, and scalable web development. Once you understand the basic concepts, the steps to do this are also very easy.
Proper steps would ensure that Docker container websites run as expected, benefiting you and your users.
Websites that use Docker containers simply update, reduce compatibility issues, and provide enhanced security. Due to their isolated nature, their benefits can be critical for static applications such as multi-service applications and dynamic apps.
Docker containers are the way to go for those who want their website to be future-proofed. They are secure, stable, and easy to maintain websites that can be usable and accessible long term with minimal updates and resources required for ever-changing trends, technologies, and needs.
