Redis single node vs Redis Cluster with sentinel

[djeanprost]

Judging from helm chart documentation, it seems that redis in cluster mode with sentinel is not supported yet. Is it possible to add this feature in the platform to allow usage of such deployment architectures ?

actual redis single node only requires : redis://host:6379 (and credentials if used)
future (?) support of sentinel mode would require :

sentinels:
  - host1:26379
  - host2:26379
master_name: mymaster

and cluster credentials of course.

[Joseph94m]

This is feasible but also requires change to our backend code to support these 2 modes standalone vs sentinel. Adding it to the backlog to plan it.

Is this a blocking feature for you?

[djeanprost]

It is somehow blocking indeed. I want to deploy plumber platform on a existing kub environment, where there is only a sentinel mode redis cluster existing (no single node). So for the moment, without this change, I will have to install a redis single node as a workaround. And as the plumber helm chart doesn't offer this option in a container next to backend, here are the options I can see :

• you implement the sentinel support
• or you add an extra redis container in plumber pod (Something like what is handled in the docker compose way) and possibility to disable it in helm chart when people have their own redis server (single node or sentinel).
• or I need to setup this temporar redis until option 1 is implemented (don't know what will happen with data if redis data is considered as persistent)
  Of course I would like to avoid the extra work with last option 🙂

[Joseph94m]

Working on integrating a deployable redis (using bitnami subchart). Should be ready today. Currently testing it locally with kind.