Add Policies Strict and Preferred for Topology Manager

pkg/kubelet/cm/topologymanager/policy_preferred.go

+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package topologymanager
+
+import (
+	"k8s.io/kubernetes/pkg/kubelet/lifecycle"
+)
+
+type preferredPolicy struct{}
+
+var _ Policy = &preferredPolicy{}
+
+// PolicyPreferred policy name.
+const PolicyPreferred policyName = "preferred"
+
+// NewPreferredPolicy returns preferred policy.
+func NewPreferredPolicy() Policy {
+	return &preferredPolicy{}
+}
+
+func (p *preferredPolicy) Name() string {
+	return string(PolicyPreferred)
+}
+
+func (p *preferredPolicy) CanAdmitPodResult(result TopologyHints) lifecycle.PodAdmitResult {
+	return lifecycle.PodAdmitResult{
+		Admit: true,
+	}
+}

pkg/kubelet/cm/topologymanager/policy_strict.go

+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package topologymanager
+
+import (
+	"k8s.io/kubernetes/pkg/kubelet/lifecycle"
+)
+
+type strictPolicy struct{}
+
+var _ Policy = &strictPolicy{}
+
+// PolicyStrict policy name.
+const PolicyStrict policyName = "strict"
+
+// NewStrictPolicy returns strict policy.
+func NewStrictPolicy() Policy {
+	return &strictPolicy{}
+}
+
+func (p *strictPolicy) Name() string {
+	return string(PolicyStrict)
+}
+
+func (p *strictPolicy) CanAdmitPodResult(result TopologyHints) lifecycle.PodAdmitResult {
+	affinity := result.Affinity
+	if !affinity {
+		return lifecycle.PodAdmitResult{
+			Admit:   false,
+			Reason:  "Topology Affinity Error",
+			Message: "Resources cannot be allocated with Topology Locality",
+		}
+	}
+	return lifecycle.PodAdmitResult{
+		Admit: true,
+	}
+}