Tag: docker

Continuous Deployment Of Web Application Containers With Jenkins And Docker

April 7, 2017

Continuous deployment (CD) is a very interesting subject. Being able to establish a build pipeline that deploys your application once building is complete is a fantastic form of automation. Jenkins is one of the most popular, if not the most popular, continuous integration (CI) and continuous deployment tool available. Traditionally one would create a workflow in Jenkins that pulls from Git, builds, and deploys the packaged application to another server via SSH. However, this process could become even more efficient using Docker and containers.

We’re going to see how to use Jenkins to build a Docker image and deploy the image as a container, replacing any previously existing containers in the process.

April 1, 2017

Nic Raboy

I’ve been on and off when it comes to Docker, but lately I’ve been starting to embrace it. In comparison to virtual machines, containers a lot easier to maintain and are more lightweight. While working with containers are great, their true power aren’t made visible until you start clustering them. There are a few clustering and orchestration options, the most popular being Kubernetes and Docker Swarm.

In this guide we’re going to see how to create a simple Docker Swarm cluster on several server nodes that consist of both manager nodes and worker nodes.

March 18, 2017

Nic Raboy

I’ve been working with Docker for a while now and I’ve found that I’m rarely using one of the vanilla images found on Docker Hub. By rarely, I don’t mean never, but in most cases I find that I’m building my own custom Docker image for any web application that I wish to containerize. This allows me to create an image that meets my needs and deploy it anywhere and anytime that I find necessary.

We’re going to see how to build a simple web application and turn it into a Docker image so it is containerized and easily deployable anywhere that Docker Engine is available.

March 15, 2017

Nic Raboy

You might have noticed that I’m doing quite a bit of Docker related articles lately. This is because I’ve been exploring it as an option for the future of my personal web applications. As of right now I’m serving several web applications on Digital Ocean under a single Apache instance. As requests come into my server, Apache routes them to the appropriate application via virtual hosts. Each application is a different directory on the virtual private server (VPS). If I were to containerize each application, things would behave a bit differently. I would need to set up a reverse proxy to route each request to a different container on the host.

While Apache can work as a reverse proxy, there are other options that work way better. For example NGINX is known for being an awesome reverse proxy solution. We’re going to see how to create several web application containers and route between them with an NGINX reverse proxy container.

March 4, 2017

Nic Raboy

When I use Docker, most of the time I start my containers in detached mode, meaning that the container will deploy in the background without any further interaction from myself. However, every once in a while I find myself needing to connect to the container to view log information.

So how do you connect to a detached container that is already running? We’re going to take a look at how to do this with minimal effort.

September 19, 2016

Nic Raboy

Recently I’ve been using a good amount of Docker for various deployment pipelines. As everyone knows, I’m a huge Raspberry Pi fan, so I figured it would be a cool idea to bring the two together. After all, Docker was built using Golang which is cross architecture.

We’re going to see how to create Docker containers on a Raspberry Pi and figure out the limitations of using Docker on IoT based architectures.

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