# Relational Databases on Kubernetes
- [Stateful and Stateless Applications](#stateful-and-stateless-applications)
- [Databases on Kubernetes](#databases-on-kubernetes)
- [Database DevOps](#database-devops)
- [PostgreSQL Operator](#postgresql-operator)
    - [Crunchy Data](#crunchy-data)
    - [Spilo](#spilo)
- [KubeDB Run production-grade databases easily on Kubernetes](#kubedb-run-production-grade-databases-easily-on-kubernetes)
- [Other solutions](#other-solutions)

## Stateful and Stateless Applications
* [xenonstack.com: Stateful and Stateless Applications Best Practices and Advantages](https://www.xenonstack.com/insights/stateful-and-stateless-applications/)

[![Statefull and Stateless Aplications](images/stateful-and-stateless-applications.png)](https://www.xenonstack.com/insights/stateful-and-stateless-applications/)

## Databases on Kubernetes
* [cloud.google.com: To run or not to run a database on Kubernetes - What to consider](https://cloud.google.com/blog/products/databases/to-run-or-not-to-run-a-database-on-kubernetes-what-to-consider)
* [reddit.com: What's the best, proper way of running a database cluster on top of Kubernetes?](https://www.reddit.com/r/kubernetes/comments/9d8on5/whats_the_best_proper_way_of_running_a_database/)
* [caylent.com: The Pros and Cons of Running Production Databases as Containers](https://caylent.com/the-pros-and-cons-of-running-production-databases-as-containers)
* [learnk8s.io: Provisioning cloud resources (AWS, GCP, Azure) in Kubernetes](https://learnk8s.io/cloud-resources-kubernetes)

## Database DevOps
- [informationweek.com: Can Enterprises Benefit From Adopting Database DevOps?](https://www.informationweek.com/devops/can-enterprises-benefit-from-adopting-database-devops/a/d-id/1337238)

## PostgreSQL Operator
- [itnext.io: Operator Lifecycle Manager](https://itnext.io/wth-is-a-operator-lifecycle-manager-873cf1661b04)

### Crunchy Data
* [crunchydata.com](https://www.crunchydata.com/)
* [learn.crunchydata.com](https://learn.crunchydata.com/)
* [github.com/CrunchyData](https://github.com/CrunchyData)
* [github.com/CrunchyData/postgres-operator](https://github.com/CrunchyData/postgres-operator)
* [crunchydata blog: Deploying Active-Active PostgreSQL on Kubernetes](https://info.crunchydata.com/blog/active-active-on-kubernetes)
* [crunchydata blog: What's New in Crunchy PostgreSQL Operator 4.0](https://info.crunchydata.com/blog/crunchy-postgres-kubernetes-operator-4.0)
* [slideshare.net: Deploying PostgreSQL on Kubernetes](https://www.slideshare.net/vyruss000/deploying-postgresql-on-kubernetes)
* [slideshare.net: Operating PostgreSQL at Scale with Kubernetes](https://www.slideshare.net/jkatz05/operating-postgresql-at-scale-with-kubernetes-137132067)
* [Youtube: Demo of Crunchy Data Postgres Operator v1.0.0 (2017)](https://www.youtube.com/watch?v=HX10WWTRiTY)
* [Youtube: Crunchy PostgreSQL Operator for Kubernetes 3.4 Overview (2018)](https://www.youtube.com/watch?v=gaXlrlz7GVc)
* [Youtube: OpenShift Meetup Tokyo #05 - Operator and Operator Lifecycle Manager on OpenShift (2019, openshift 4.1)](https://www.youtube.com/watch?v=X4vuktlK0Tg)
* [info.crunchydata.com: Monitoring PostgreSQL clusters in kubernetes](https://info.crunchydata.com/blog/monitoring-postgresql-clusters-in-kubernetes)
* [thenewstack.io: Advanced Kubernetes Namespace Management with the PostgreSQL Operator](https://thenewstack.io/advanced-kubernetes-namespace-management-with-the-postgresql-operator/)
* [info.crunchydata.com: Deploy High-Availability PostgreSQL Clusters on Kubernetes by Example](https://info.crunchydata.com/blog/deploy-high-availability-postgresql-on-kubernetes)
* [info.crunchydata.com: Migrating from Oracle to PostgreSQL: Tips and Tricks](https://info.crunchydata.com/blog/migrating-from-oracle-to-postgresql-questions-and-considerations)
* [info.crunchydata.com: Scheduled PostgreSQL Backups and Retention Policies with Kubernetes](https://info.crunchydata.com/blog/schedule-postgresql-backups-and-retention-with-kubernetes)
* [info.crunchydata.com: Guard Against Transaction Loss with PostgreSQL Synchronous Replication](https://info.crunchydata.com/blog/synchronous-replication-in-the-postgresql-operator-for-kubernetes-guarding-against-transactions-loss)
* [info.crunchydata.com: Crunchy PostgreSQL for Kubernetes 4.3 Released](https://info.crunchydata.com/news/crunchy-postgresql-for-kuberenetes-4.3) Crunchy #PostgreSQL for #Kubernetes 4.3 released! Now supports multi-Kubernetes deployments, easier customization + installation, TLS, pgAdmin 4, improved pgBouncer support, and much more!
* [info.crunchydata.com: Deploy pgAdmin4 with PostgreSQL on Kubernetes](https://info.crunchydata.com/blog/deploy-pgadmin4-with-postgresql-on-kubernetes)
* [info.crunchydata.com: Multi-Kubernetes Cluster PostgreSQL Deployments](https://info.crunchydata.com/blog/multi-kubernetes-cluster-postgresql-deployments)
* [info.crunchydata.com: Quickly Document Your Postgres Database Using psql Meta-Commands](https://info.crunchydata.com/blog/d-meta)

### Spilo 
* [Spilo: HA PostgreSQL Clusters with Docker](https://github.com/zalando/spilo) Spilo is a Docker image that provides PostgreSQL and Patroni bundled together. Patroni is a template for PostgreSQL HA. 
* [Patroni](https://github.com/zalando/patroni)
* [How I've Set Up HA PostgreSQL on Kubernetes (powered by Patroni, a template for PostgreSQL HA)](https://disaev.me/p/how-i-have-set-up-ha-postgresql-on-kubernetes/)

## KubeDB Run production-grade databases easily on Kubernetes
* [kubedb.com](https://kubedb.com/)

## Other solutions
* [Cockroach](https://www.cockroachlabs.com/docs/stable/orchestration.html)