58 lines
2.1 KiB
Go
58 lines
2.1 KiB
Go
package tainttoleration
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import (
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"context"
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"fmt"
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v1 "k8s.io/api/core/v1"
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v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
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clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
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policyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/policy/v1alpha1"
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workv1alpha1 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha1"
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"github.com/karmada-io/karmada/pkg/scheduler/framework"
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)
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const (
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// Name is the name of the plugin used in the plugin registry and configurations.
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Name = "TaintToleration"
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)
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// TaintToleration is a plugin that checks if a propagation policy tolerates a cluster's taints.
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type TaintToleration struct{}
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var _ framework.FilterPlugin = &TaintToleration{}
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var _ framework.ScorePlugin = &TaintToleration{}
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// New instantiates the TaintToleration plugin.
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func New() framework.Plugin {
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return &TaintToleration{}
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}
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// Name returns the plugin name.
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func (p *TaintToleration) Name() string {
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return Name
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}
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// Filter checks if the given tolerations in placement tolerate cluster's taints.
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func (p *TaintToleration) Filter(ctx context.Context, placement *policyv1alpha1.Placement, resource *workv1alpha1.ObjectReference, cluster *clusterv1alpha1.Cluster) *framework.Result {
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filterPredicate := func(t *v1.Taint) bool {
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// now only interested in NoSchedule taint which means do not allow new resource to schedule onto the cluster unless they tolerate the taint
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// todo: supprot NoExecute taint
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return t.Effect == v1.TaintEffectNoSchedule
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}
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taint, isUntolerated := v1helper.FindMatchingUntoleratedTaint(cluster.Spec.Taints, placement.ClusterTolerations, filterPredicate)
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if !isUntolerated {
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return framework.NewResult(framework.Success)
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}
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return framework.NewResult(framework.Unschedulable, fmt.Sprintf("cluster had taint {%s: %s}, that the propagation policy didn't tolerate",
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taint.Key, taint.Value))
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}
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// Score calculates the score on the candidate cluster.
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func (p *TaintToleration) Score(ctx context.Context, placement *policyv1alpha1.Placement, cluster *clusterv1alpha1.Cluster) (float64, *framework.Result) {
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return 0, framework.NewResult(framework.Success)
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}
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