Captaining a container ship: Docker orchestration with Kontena
Docker containers have proven to be a great tool for spinning up applications in development, testing or even production environments. But have you thought about how to handle the growth you're going to see? You start with just a web server and MySQL. Then you add Varnish for performance. And Redis to take load off the database. Maybe Solr for faster searching? Or better Elasticsearch, you can also use that for log processing in conjunction with Logstash and Kibana. Then you realize that you have lots of single points of failure and start adding redundancy to your infrastructure. Your journey to more flexible application deployment might very well end in a maintenance nightmare, but it doesn't have to.
Managing containers at scale requires orchestration tools, and there's lots of choice: Docker Swarm, Rancher, Kubernetes, Mesosphere - the list keeps growing and growing. Unfortunately, these tools often are as complex themselves as the problem they're trying to solve. In the meantime, a nice little Docker orchestration platform from Finland has come to solve this conundrum. It's called Kontena and it's as easy to set up as it is getting an application stack running on it. We found Kontena through an evaluation project in our internship programme and promptly went to use it in our Drupal hosting infrastructure.
In my talk, I'm going to explain how Kontena works and why it's the ideal starting point for people who'd like to learn Docker orchestration. Among others, my presentation will cover these topics:
- The Kontena architecture
- Setting up a Kontena cluster
- Upgrading from Docker Compose
- Deploying an application stack
- Network and security
I'm still amazed how easy it is to use Kontena in practice, and this talk will be easy to understand even by people new to Docker containers.
About the author: Jochen Lillich is the founder and CEO of freistil IT, a distributed team of web operations experts running the managed hosting platform freistilbox. After studying computer science in the 90's, Jochen founded a number of IT businesses and gained experience in IT management at leading internet companies in Germany. Today, Jochen lives with his family near Dublin, Ireland. Jochen has been an active and passionate speaker in the IT space since 1999 and has given keynotes and presentations at conferences like DrupalCon, OSDC, DevOps Days and many barcamps and user group meetings all over Europe. As DevOps Track Chair, Jochen also helped organise DrupalCon Prague in 2013.