Ephemeral-Storage in MaxNodePoolResources Uses Raw Bytes (×1000 Off) in Error Message #400
Description
What happened?
In KAI Scheduler’s MaxNodePoolResources predicate, ephemeral-storage requests and limits are printed in the unschedulable message using raw integer bytes, without unit conversion, and are also off by a factor of 1000 compared to other resources.
MaxNodePoolResources: The pod <mypod> requires GPU: 0, CPU: 2.5 (cores), memory: 3.758 (GB), ephemeral-storage: 32212254720000
Cause:
- CPU and memory values are converted to cores/GB before formatting.
- Scalar resources like ephemeral-storage skip conversion and use the stored int64 value directly.
- The stored value is in bytes, so it shows huge numbers and doesn’t match the GB format used elsewhere.
Impact:
Error messages are misleading, showing unreadable byte counts that are ~1000× larger than the intended GB values.
I hope it does not affect actual scheduling logic and is purely a display/formatting issue.
Reproduce via adding the following test case to the Test_podToMaxNodeResourcesFiltering:
{
"not enough ephemeral storage",
args{
nodesMap: map[string]*node_info.NodeInfo{
"n1": {
Allocatable: resource_info.ResourceFromResourceList(v1.ResourceList{
v1.ResourceCPU: resource.MustParse("100m"),
v1.ResourceMemory: resource.MustParse("200Mi"),
resource_info.GPUResourceName: resource.MustParse("1"),
"kai.scheduler/r1": resource.MustParse("2"),
v1.ResourceEphemeralStorage: resource.MustParse("10Gi"),
}),
},
"n2": {
Allocatable: resource_info.ResourceFromResourceList(v1.ResourceList{
v1.ResourceCPU: resource.MustParse("500m"),
v1.ResourceMemory: resource.MustParse("200Mi"),
resource_info.GPUResourceName: resource.MustParse("1"),
"kai.scheduler/r1": resource.MustParse("2"),
v1.ResourceEphemeralStorage: resource.MustParse("20Gi"),
}),
},
},
pod: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "name1",
Namespace: "n1",
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "c1",
Resources: v1.ResourceRequirements{
Requests: map[v1.ResourceName]resource.Quantity{
v1.ResourceEphemeralStorage: resource.MustParse("25G"),
},
},
},
},
},
},
},
expected{
k8sframework.NewStatus(k8sframework.Unschedulable,
"The pod n1/name1 requires GPU: 0, CPU: 0 (cores), memory: 0 (GB), ephemeral-storage: 25 (GB). "+
"Max ephemeral-storage resources available in a single node in the default node-pool is topped at 10.737 GB"),
},
},
What did you expect to happen?
Expected that ephemeral-storage is shown in human readable format.
Environment
- Kubernetes version: v1.33.3
- KAI Scheduler version: v0.7.8
- Cloud provider or hardware configuration
- Tools that you are using KAI together with
- Anything else that is relevant