patroni VS crunchy-proxy

Citus doesn't provide fault tolerance. Each shard is a monolithic PostgreSQL. To reduce downtime on failures, you can protect each shard with a standby database. As this is a complex configuration, Patroni can help. For this lab I'll use the Citus+Patroni docker-compose-citus.yml from https://github.com/zalando/patroni.git:

We have been using stolon + consul for years without issue in our swarm environments. It may also be possible with patroni.

one of the solutions which made it pretty simple for us to run postgresql in a ha environment (mostly in k8s, but works standalone as well) is zalandos patroni: https://github.com/zalando/patroni it's really solid and worked for us for a few years already.

or for k8s their operator: https://github.com/zalando/postgres-operator (docker image: https://github.com/zalando/spilo) we've also tried other operators which were easier to get started, but they failed miserably (crunchyrolls operator is basically based on the zalando one)

Hello. I am currently using this docker-compose model from Zalando repository. It does not include PgBouncer in its architecture by default. I've been trying to find a containerized implementation involving Patroni, HAProxy, Etcd and PgBouncer. I didn't find anything solid so far.

General purpose: Patroni - Set up your own etcd + HAProxy + Patroni + Postgres components and it'll generally manage itself after that.

I don't have a great answer for you except that it sounds like you are trying to create your own version of patroni. Is there a good reason to not just use patroni?

git clone https://github.com/zalando/patroni.git cd patroni docker build -t patroni . docker-compose up -d

I actually used Patroni on Openshift in my company. To be update with the latest version we created our helm chart.

This is why I always recommend using a postgres proxy so you can point it to different database servers as you stand them up. AWS does this by default but GCP doesn’t yet, so you have to have your own Postgres proxy (e.g https://github.com/CrunchyData/crunchy-proxy) or move to an HA Postgres setup like Patroni that has streaming replication (https://github.com/zalando/patroni).