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volume scheduler: move reason strings into volume code

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The scheduler doesn't really need to know in detail which reasons
rendered a node unusable for a node. All it needs from the volume
binder is a list of reasons that it then can present to the user.

This seems a bit cleaner. But the main reason for the change is that
it simplifies the checking of CSI inline volumes and perhaps later
capacity checking. Both will lead to new failure reasons, which then
can be added without changing the interface.
This commit is contained in:
Patrick Ohly
2020-02-14 13:40:29 +01:00
parent c73532c4f7
commit 6eb0b034ac
7 changed files with 174 additions and 216 deletions
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6
pkg/scheduler/core/generic_scheduler_test.go
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@@ -38,6 +38,7 @@ import (
"k8s.io/client-go/informers"
clientsetfake "k8s.io/client-go/kubernetes/fake"
extenderv1 "k8s.io/kube-scheduler/extender/v1"
volumescheduling "k8s.io/kubernetes/pkg/controller/volume/scheduling"
schedulerapi "k8s.io/kubernetes/pkg/scheduler/apis/config"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/defaultbinder"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/defaultpodtopologyspread"
@@ -50,7 +51,6 @@ import (
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/podtopologyspread"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/queuesort"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/tainttoleration"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/volumebinding"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/volumerestrictions"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/volumezone"
framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
@@ -1999,8 +1999,8 @@ func TestNodesWherePreemptionMightHelp(t *testing.T) {
name: "ErrVolume... errors should not be tried as it indicates that the pod is unschedulable due to no matching volumes for pod on node",
nodesStatuses: framework.NodeToStatusMap{
"machine1": framework.NewStatus(framework.UnschedulableAndUnresolvable, volumezone.ErrReasonConflict),
"machine2": framework.NewStatus(framework.UnschedulableAndUnresolvable, volumebinding.ErrReasonNodeConflict),
"machine3": framework.NewStatus(framework.UnschedulableAndUnresolvable, volumebinding.ErrReasonBindConflict),
"machine2": framework.NewStatus(framework.UnschedulableAndUnresolvable, volumescheduling.ErrReasonNodeConflict),
"machine3": framework.NewStatus(framework.UnschedulableAndUnresolvable, volumescheduling.ErrReasonBindConflict),
},
expected: map[string]bool{"machine4": true},
},