ingress-traefik
https://doc.traefik.io/traefik/providers/kubernetes-crd/
postgresql中文现在手册
http://www.postgres.cn/docs/12/

How to Automate PostgreSQL 12 Replication and Failover with repmgr

https://www.2ndquadrant.com/en/blog/how-to-automate-postgresql-12-replication-and-failover-with-repmgr-part-2/

https://www.2ndquadrant.com/en/blog/how-to-automate-postgresql-12-replication-and-failover-with-repmgr-part-1/

https://github.com/2ndQuadrant/repmgr/blob/REL3_3_STABLE/README.md