Control the memory consumption of Redis Stack

[iohenkies]

On Kubernetes, using Falco, Falcosidekick and Falcosidekick UI with the Redis instance that comes with it, we're looking for a way to control Redis memory usage. Because usage seems to grow and grow until the Redis pod gets OOM killed over and over again.

This is the used Redis config:

    redis:
      enabled: true
      image:
        pullPolicy: IfNotPresent
        registry: docker.io
        repository: redis/redis-stack
        tag: "7.2.0-v8"
      storageEnabled: true
      storageSize: "20Gi"
      storageClass: ""
      resources:
        requests:
          cpu: 500m
          memory: 1024Mi
        limits:
          cpu: 2000m
          memory: 4096Mi

And I believe the ttl setting below should rotate data:

  webui:
    enabled: true
    replicaCount: 2
    ttl: 7d

It is unclear what Redis does with this setting. It would be useful to be able to set settings like the below, which should probably prevent these issues:

maxmemory-policy allkeys-lfu
maxmemory 4096mb

I hope there is a way to keep it manageable without increasing the memory limit and decreasing the ttl.

[Issif]

Thanks for this issue and the details. I'll think a way to manage that.

[poiana]

Issues go stale after 90d of inactivity.

Mark the issue as fresh with /remove-lifecycle stale.

Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

Provide feedback via https://github.com/falcosecurity/community.

/lifecycle stale

[iohenkies]

/remove-lifecycle stale

[poiana]

Issues go stale after 90d of inactivity.

Mark the issue as fresh with /remove-lifecycle stale.

Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

Provide feedback via https://github.com/falcosecurity/community.

/lifecycle stale

[jemag]

/remove-lifecycle stale

[Issif]

It's now possible to specify a custom config for the redis deployed with falcosidekick-ui: https://github.com/falcosecurity/charts/blob/22b3f58f5e7816ffdce8cb67ec2aa132192429d7/charts/falcosidekick/values.yaml#L1243