Autoscaling with Agones set replicas to 0

[svetch]

What happened?

Hi!

I enabled the autoscaling for a MinecraftServerFleet with this options:

  autoscaling:
    agonesPolicy:
      type: Buffer
      buffer:
        bufferSize: "30%"
        minReplicas: 2
        maxReplicas: 6

and now the fleet replicas count is 0

  replicas: 0
  scheduling: Packed
  strategy:
    type: Recreate

FleetAutoscaler status:

spec:
  fleetName: arena
  policy:
    buffer:
      bufferSize: 30%
      maxReplicas: 6
      minReplicas: 2
    type: Buffer
  sync:
    fixedInterval:
      seconds: 30
    type: FixedInterval
status:
  ableToScale: true
  currentReplicas: 0
  desiredReplicas: 2
  lastScaleTime: '2024-03-06T08:16:35Z'
  scalingLimited: true

What components are involved in your issue?

Operator

Version

0.7.0

Kubernetes Version

1.28

Relevant log output

{"timestamp":"2024-03-06T08:14:35.884131Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: Fleet.v1.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:14:36.185523Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: FleetAutoscaler.v1.autoscaling.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:15:05.891017Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: Fleet.v1.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:15:06.186492Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: FleetAutoscaler.v1.autoscaling.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:15:35.891614Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: Fleet.v1.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:15:36.179388Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: FleetAutoscaler.v1.autoscaling.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:16:05.888015Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: Fleet.v1.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:16:06.205542Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: FleetAutoscaler.v1.autoscaling.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:16:35.891946Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: Fleet.v1.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:16:36.216893Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: FleetAutoscaler.v1.autoscaling.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:17:05.883890Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: Fleet.v1.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:17:06.192745Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: FleetAutoscaler.v1.autoscaling.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:17:35.887584Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: Fleet.v1.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:17:36.180342Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: FleetAutoscaler.v1.autoscaling.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:18:05.888310Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: Fleet.v1.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:18:06.225502Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: FleetAutoscaler.v1.autoscaling.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}
{"timestamp":"2024-03-06T08:18:35.886955Z","level":"INFO","fields":{"message":"reconciling MinecraftServerFleet","name":"arena","namespace":"shulker-system"},"target":"shulker_operator::reconcilers::minecraft_server_fleet","span":{"name":"reconcile"},"spans":[{"object.reason":"related object updated: Fleet.v1.agones.dev/arena.shulker-system","object.ref":"MinecraftServerFleet.v1alpha1.shulkermc.io/arena.shulker-system","name":"reconciling object"},{"name":"reconcile"}]}

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[jeremylvln]

Hi @svetch!

Hope you are doing well & thanks for opening this issue.

I know what is the issue here, I think Agones & Shulker are fighting each other to update the Fleet. Probably the replicas field. The "framework" I created for managing easily Kubernetes resources does not know yet how to "ignore" certain modifications. But it's something I already had in mind.

I'll try to fix this ASAP, I'm quite busy this week but I'll try to look into it at the beginning of the next week!

[CronixZero]

Bump 👋