Replace the simple boolean ScaledUp property of ScaleUpStatus with a more
comprehensive ScaleUpResult. Add more possible values to ScaleDownResult.
Refactor the processors execution so that they are always executed every
iteration, even if RunOnce exits earlier.
- This is intended to address the issue described in https://github.com/kubernetes/autoscaler/issues/923
- the delay is configurable via a CLI option
- in production (on AWS) we set this to a value of 2m
- the delay could possibly be set as low as 30s and still be effective depending on your workload and environment
- the default of 0 for the CLI option results in no change to the CA's behavior from defaults.
Change-Id: I7e3f36bb48641faaf8a392cca01a12b07fb0ee35
No change in actual logic being executed. Added a new
NodeGroupListProcessor interface to encapsulate the existing logic.
Moved PodListProcessor and refactor how it's passed around
to make it consistent and easy to add similar interfaces.
AutoscalingContext is basically a configuration and few static helpers
and API handles.
ClusterStateRegistry is state and thus moved to other state-keeping
objects.
The CleanUp method is instead called directly from the implementation,
when required.
Test updated in a quick way since the mock we're using does not support
AtLeast(1) - thus Times(2).
Nodes with GPU are expensive and it's likely a bunch of pods
using them will be created in a batch. In this case we can
wait a bit for all pods to be created to make more efficient
scale-up decision.
When a machine with GPU becomes ready it can take
up to 15 minutes before it reports that GPU is allocatable.
This can cause Cluster Autoscaler to trigger a second
unnecessary scale up.
The workaround sets allocatable to capacity for GPU so that
a node that waits for GPUs to become ready to use will be
considered as a place where pods requesting GPUs can be
scheduled.
This can be used to dynamically update cloud provider
config (in particular list of managed NodeGroups and their
min/max constraints).
Add GKE implementation.
Jakub Tużnik
Steve Scaffidi
Aleksandra Malinowska
Krzysztof Jastrzebski
Beata Skiba
Maciej Pytel
Karol Gołąb
anniedy
Marcin Wielgus
Edward Tsang