Charts: [stable/Redis] Cannot create multiple masters nodes

[ekhaduk]

Is this a request for help?:

---

Is this a BUG REPORT or FEATURE REQUEST? (choose one):

Version of Helm and Kubernetes:
Helm: 2.11.0
Kubernates: 1.12.5
Which chart:
redis/stable

What happened:
Cannot create more that one redis master using the helm chart.

What you expected to happen:
Add an option to create more than one redis master

How to reproduce it (as minimally and precisely as possible):
-

Anything else we need to know:
-

[juan131]

Hi @ekhaduk

This Redis chart configures the Redis cluster using a Master-Slave topology (it doesn't use Redis Cluster or Redis Sentinel to configure HA). Therefore, you don't need more than 1 master replica.

[ilterpehlivan]

Hi,

According to the documentation "https://redis.io/topics/cluster-tutorial" multiple masters are recommended and actually following quoted from this documentation:

Note that the minimal cluster that works as expected requires to contain at least three master nodes. For your first tests it is strongly suggested to start a six nodes cluster with three masters and three slaves.

Moreover, during our tests by using stable/helm chart we figured out that 1 master memory is becoming full for high load and increasing Slaves have no help.
That is why, I think master numbers should be configurable in the chart

Thanks

[juan131]

Hi @ilterpehlivan

This Helm chart does not setup a Redis Cluster. It just creates a set of slaves for a single master node.

Please note I'm not saying that Redis Cluster is not recommended, I'm just stating that this Helm chart is not designed for that kind of configuration.

You might be looking for a configuration such as the one available on this other chart: https://github.com/helm/charts/tree/master/stable/redis-ha

[ilterpehlivan]

Hi @juan131 ,

Thanks for the reply.
I am well aware of redis-ha chart repo but it is giving the sentinel deployment option instead of redis-cluster. I want to use redis-cluster and not to have additional applications (sentinel) running on each node.
I though this repo is providing redis-cluster option with multiple master/slaves but apparently I was wrong.

So we need to build our charts :)

Anyway thanks again

[juan131]

You're welcome @ilterpehlivan !!

I'll share your feedback with the team and we'll study whether it's convenient to support Redis Cluster on this Helm chart. Thanks for your interest!

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This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Any further update will cause the issue/pull request to no longer be considered stale. Thank you for your contributions.

[stale[bot]]

This issue is being automatically closed due to inactivity.

[cs94njw]

Can someone point to a true Redis-cluster helm chart? Or is it not possible?
I need to create a multi-master high availability cluster for Redis, and I don't know if it's just not possible, or no-one has created a helm chart for it yet.