Keldon — Kubernetes Operator for Apache Cloudberry (looking for feedback)

[elhimad]

Hi everyone,

I've been building Keldon, an open-source Kubernetes operator for Apache Cloudberry, and just shipped the first public release (v0.11.1).

What it does:

• Fully automated cluster bootstrap via gpinitsystem — coordinator, standby, segments, and mirrors, all provisioned declaratively from a single YAML
• Horizontal scale-up: patch spec.segments.count, the operator provisions new pods and redistributes data automatically
• Two SSH trust models: static keypair for dev/CI, certificate mode for production (per-cluster CA, short-lived certs, annotation-driven rotation without pod restarts)
• Declarative postgresql.conf and pg_hba.conf management via DatabaseConfig
• High availability out of the box: standby coordinator (WAL streaming, auto-promoted on failure) and mirror segments (one mirror per primary, auto-recovered via gprecoverseg)
• On-demand backups to S3-compatible storage via gpbackup, with cross-cluster restore support
• Phase-driven lifecycle: PodsStarting → SSHReady → Initializing → Running, with the operator reconciling continuously from there
• Admission webhook that catches errors at the API boundary — cluster name length, HA node availability, invalid CRD references — before anything reaches a pod
• Helm install, cert-manager for webhook TLS, Kubernetes 1.29+

Why I built it: Standing up a Cloudberry cluster is operationally heavy — SSH trust, gpinitsystem, segment registration, mirror setup, replication wiring. Keldon automates all of it so you can go from zero to a running MPP cluster without touching any of it manually.

What I'm looking for:

1. Are there use cases or deployment patterns in the community I haven't accounted for?
2. Anything in the way Keldon models clusters that conflicts with how you think about Cloudberry architecture?
3. If you get a chance to try it, I'd love to hear what breaks — missing features / bug to fix 

Repo: github.com/keldonio/keldon-operator
Docs: keldon.io/docs

Happy to answer questions or take direction on anything missing.

— Imad

[jianlirong]

This is a feature many users have been asking for. Fantastic work—this is a huge step forward for the Apache Cloudberry ecosystem. I'm really impressed by what you've built. I'll give Keldon a try right away and share any feedback I have. Looking forward to using it!

[elhimad]

Thanks, I really appreciate it! I’m looking forward to contributing to the Apache Cloudberry community. Please let me know if you encounter any issues running Keldon.