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Show the details on the failure of preemption

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Since the filter status is missed for the phase of preemption, there
will be no way to tell why the preemption failed for some reasons, and
those reasons could be different with the status from the main scheduling
process (the first failed plugin will hide other failures in the chain).

This change provides verbose information based on the node status generated
during pod preemption, those information helps us to diagnose the issue which
is happened during pod preemption.

Signed-off-by: Dave Chen <dave.chen@arm.com>
This commit is contained in:
Dave Chen
2020-12-10 15:40:14 +08:00
parent ab8dda3c88
commit 7315c1f6dd
9 changed files with 122 additions and 73 deletions
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2
pkg/scheduler/framework/interface.go
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@@ -63,7 +63,7 @@ const (
// scheduler skip preemption.
// The accompanying status message should explain why the pod is unschedulable.
Unschedulable
// UnschedulableAndUnresolvable is used when a PreFilter plugin finds a pod unschedulable and
// UnschedulableAndUnresolvable is used when a plugin finds a pod unschedulable and
// preemption would not change anything. Plugins should return Unschedulable if it is possible
// that the pod can get scheduled with preemption.
// The accompanying status message should explain why the pod is unschedulable.