kubecon24/content/day1/10_lessons_learned_from_building_a_db_operator.md

title	weight	tags
Lessons Learned from Building a Database Operator	10	platform db

Another talk as part of the Data On Kubernetes Day.

Baseline

Hosting Models

• Managed: Atlas
• Semi: Cloud manager
• Selfhosted: Enterprise and community operator

Mongo on K8s

• Cluster Architecture
  • Control Plane: Operator
  • Data Plane: MongoDB Server + Agen (Sidecar Proxy)
• Enterprise Operator
  • Opsmanager CR: Deploys 3-node operator DB and OpsManager
  • MongoDB CR: The MongoDB cLusters (Compromised of agents)
• Advanced Usecase: Data Platform with mongodb on demand
  • Control Plane on one cluster (or on VMs/Hardmetal), data plane in tennant clusters
  • Result: MongoDB CR can not relate to OpsManager CR directly

Pitfalls

• Storage: Agnostic, Topology aware, configureable and resizeable (can't be done with statefulset)
• Networking: Cluster-internal (Pod to Pod/Service), External (Split horizon over multicluster)