Everything I know about Kubernetes I learned from a Raspberry Pi cluster
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This document discusses running Kubernetes and Drupal 8 on a cluster of Raspberry Pis. It begins by asking how well Kubernetes can run on a cluster of small, credit-card sized computers like Raspberry Pis. It then provides a brief overview of what Kubernetes is and how it manages applications and services running on multiple servers. The document goes on to describe a demo of running Kubernetes and Drupal 8 on a Raspberry Pi cluster and notes it was about 20-50% slower than a single MacBook Pro. It closes by discussing some challenges of using a Raspberry Pi cluster with Kubernetes and points to additional resources on the topic.
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Everything I know about Kubernetes I learned from a Raspberry Pi cluster
- 1. Everything I know about Kubernetes I learned from a cluster of Raspberry Pis Jeff Geerling, Senior Technical Architect @ Acquia (geerlingguy)
- 3. The Big Question What can I do with my Raspberry Pi?
- 4. The Big Question How well does Kubernetes run on a cluster of credit-card sized computers?
- 5. The Big Question How well does Drupal 8 run on Kubernetes on a cluster of credit-card sized computers?
- 6. But BEFORE all that What the heck is Kubernetes?
- 7. You have applications and services you need to run. Drupal RedisMySQL Solr Logs Chat Cron You have a bunch of servers to run them on.
- 8. Kubernetes puts things on servers Drupal Redis MySQL Solr Logs Chat Cron ...and makes sure they keep running.
- 9. See also: Return of the Clustering: Kubernetes for Drupal (from Tess Flynn / @socketwench, yesterday!)
- 15. 2019-TBD
- 16. Problem How do you put Kubernetes and Drupal on a cluster of Raspberry Pis?
- 17. “Configuration management for humans.” ___________ < And cows! > ----------- ^__^ (oo)_______ (__) )/ ||----w | || ||
- 18. Demo
- 19. So how is it?
- 20. For comparison: • My (single) MacBook Pro: 20-50% slower*
- 21. ! Home-as-a-Datacenter • Where will you keep the Pi? • 🔌 Power, 🌐 Network, 🔐 Physical security • Who will maintain the Pi? • What happens if you get 📈 Slashdotted/Hacker News'ed/Reddit Hugged?
- 22. ! Kubernetes • Requires more rigor: deployment, automation • RBAC missteps can lead to major security holes 🤦 • Stateful is still not easy (storage, DBs) • Need a dictionary 📕 • Done well, can do amazing things • Done poorly, "failure at web scale"
- 23. The Big Question How well does Drupal 8 run on Kubernetes on a cluster of credit-card sized computers?
- 24. Resources • Raspberry Pi Dramble • Drupal for Kubernetes • Drupal Pi (Single Pi) • Ansible for DevOps • Jeff Geerling's Blog