K8s Databases

Percona Operators for PostgreSQL and MongoDB. (Updated: January 2026). All deployments are idempotent - operators reconcile to desired state.

Percona Operators

Operator	Version	Database
Percona PostgreSQL	v2.8.2	PostgreSQL 18.x
Percona Server MongoDB	v1.21.2	MongoDB 8.0.x

Always use latest versions. Operators include built-in backup, monitoring, and HA management.

Deployment Tiers

Tier	PostgreSQL	MongoDB	HA
minimal/small	1 replica	1 replica	No
medium/production	3 replicas + PgBouncer	3 replicas (ReplicaSet)	Yes

Installation

See references/postgresql.md and references/mongodb.md for deployment.

Get Connections

# PostgreSQL
kubectl get secret myapp-pg-pguser-myapp -n databases \
  -o jsonpath='{.data.uri}' | base64 -d

# MongoDB
kubectl get secret myapp-mongo-secrets -n databases \
  -o jsonpath='{.data.MONGODB_DATABASE_ADMIN_URI}' | base64 -d

Reference Files

• references/postgresql.md - PostgreSQL HA cluster
• references/postgresql-single.md - PostgreSQL single instance
• references/mongodb.md - MongoDB ReplicaSet
• references/backups.md - Backup with MinIO
• references/monitoring.md - Metrics and alerting