Rook

Ceph on steroids

/me

SRE Freelance

DevOps Advocate

barpilot founder

Former:

• cloudwatt
• criteo
• …

• podcaster https://p7t.tech
  • Dev'Obs
  • Dans Ton Kube
  • Votre Profile Nous Intéresse

Ceph

• Some (small) dev on RGW
• Chef Ceph cookbook maintainer (former)
• Production in 2012

Kubernetes

• First work in 2015
  • Openstack Over Kubernetes @Cloudwatt (Jarvis)
• Creator of ~5 operators
• Main goal of my company
  • Kubernetes Over Kubernetes (kinky)
• Formations
• Consulting

Previously

in the automation universe

Chef Cookbook

• Total Files: 70
• Total Lines of Code: 2774 (6115 added, 3341 removed)
• Total Commits: 451
• Authors: 45 (average 10.0 commits per author)

Chef Cookbook (bis)

• Fork in 2015 without history or credit (sic)

  • I have so many things to say...

• Total Files: 124

• Total Lines of Code: 8891 (11648 added, 2757 removed)

• Total Commits: 249

• Authors: 14 (average 17.8 commits per author)

Ansible Playbook

• Total Files: 536

• Total Lines of Code: 34058 (92954 added, 58896 removed)

• Total Commits: 4078 (average 4.6 commits per active day, 2.4 per all days)

• Authors: 219 (average 18.6 commits per author)

Complexity

• Matrix
  • Framework
  • Software
  • Dependencies
  • OS
  • Automation 
• Operations non-idempotent
• Run-time information sharing cross-nodes

ok

Kubernetes

containers and all things right

Resume

• Orchestrator
• Opinionated
• Based on Google experience

• Do the things, without magic
  • Declarative
  • API
  • No inside men (almost)
• Open Source
• Fondation CNCF

Reproducibility!

• Immutability
• Iso-environments
• Application Container Artefacts

Creating a Ceph cluster with rook

Demo Time!

Operator Pattern

Putting Operational Knowledge into Software

Kubernetes links

• CNCF project

Ceph’s orchestrator framework

• Ceph mgr

Usage

• Inside / outside kubernetes
• Block / object / FS

+

• Minio https://www.minio.io/
• CockroachDB https://www.cockroachlabs.com/

Next

• decorrelate Ceph / Rook versionning

• Other frameworks