add vendor package

Issue-Id: OOM-61
Change-Id: I251336e3b711b14f8ae9a8b0bf6055011a1d9bc8
Signed-off-by: HuabingZhao <zhao.huabing@zte.com.cn>

4 files changed, 260 insertions, 0 deletions

diff --git a/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/doc.go b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/doc.go
new file mode 100644
index 0000000..ebc1cc5
--- /dev/null
+++ b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/doc.go
@@ -0,0 +1,25 @@
+/*
+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 qos contains helper functions for quality of service.
+// For each resource (memory, CPU) Kubelet supports three classes of containers.
+// Memory guaranteed containers will receive the highest priority and will get all the resources
+// they need.
+// Burstable containers will be guaranteed their request and can “burst” and use more resources
+// when available.
+// Best-Effort containers, which don’t specify a request, can use resources only if not being used
+// by other pods.
+package qos
diff --git a/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/policy.go b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/policy.go
new file mode 100644
index 0000000..ad696f3
--- /dev/null
+++ b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/policy.go
@@ -0,0 +1,66 @@
+/*
+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 qos
+
+import (
+	"k8s.io/kubernetes/pkg/api"
+)
+
+const (
+	PodInfraOOMAdj        int = -999
+	KubeletOOMScoreAdj    int = -999
+	KubeProxyOOMScoreAdj  int = -999
+	guaranteedOOMScoreAdj int = -998
+	besteffortOOMScoreAdj int = 1000
+)
+
+// GetContainerOOMAdjust returns the amount by which the OOM score of all processes in the
+// container should be adjusted.
+// The OOM score of a process is the percentage of memory it consumes
+// multiplied by 10 (barring exceptional cases) + a configurable quantity which is between -1000
+// and 1000. Containers with higher OOM scores are killed if the system runs out of memory.
+// See https://lwn.net/Articles/391222/ for more information.
+func GetContainerOOMScoreAdjust(pod *api.Pod, container *api.Container, memoryCapacity int64) int {
+	switch GetPodQOS(pod) {
+	case Guaranteed:
+		// Guaranteed containers should be the last to get killed.
+		return guaranteedOOMScoreAdj
+	case BestEffort:
+		return besteffortOOMScoreAdj
+	}
+
+	// Burstable containers are a middle tier, between Guaranteed and Best-Effort. Ideally,
+	// we want to protect Burstable containers that consume less memory than requested.
+	// The formula below is a heuristic. A container requesting for 10% of a system's
+	// memory will have an OOM score adjust of 900. If a process in container Y
+	// uses over 10% of memory, its OOM score will be 1000. The idea is that containers
+	// which use more than their request will have an OOM score of 1000 and will be prime
+	// targets for OOM kills.
+	// Note that this is a heuristic, it won't work if a container has many small processes.
+	memoryRequest := container.Resources.Requests.Memory().Value()
+	oomScoreAdjust := 1000 - (1000*memoryRequest)/memoryCapacity
+	// A guaranteed pod using 100% of memory can have an OOM score of 1. Ensure
+	// that burstable pods have a higher OOM score adjustment.
+	if oomScoreAdjust < 2 {
+		return 2
+	}
+	// Give burstable pods a higher chance of survival over besteffort pods.
+	if int(oomScoreAdjust) == besteffortOOMScoreAdj {
+		return int(oomScoreAdjust - 1)
+	}
+	return int(oomScoreAdjust)
+}
diff --git a/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/qos.go b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/qos.go
new file mode 100644
index 0000000..2c0d19d
--- /dev/null
+++ b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/qos.go
@@ -0,0 +1,140 @@
+/*
+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 qos
+
+import (
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/resource"
+)
+
+// isResourceGuaranteed returns true if the container's resource requirements are Guaranteed.
+func isResourceGuaranteed(container *api.Container, resource api.ResourceName) bool {
+	// A container resource is guaranteed if its request == limit.
+	// If request == limit, the user is very confident of resource consumption.
+	req, hasReq := container.Resources.Requests[resource]
+	limit, hasLimit := container.Resources.Limits[resource]
+	if !hasReq || !hasLimit {
+		return false
+	}
+	return req.Cmp(limit) == 0 && req.Value() != 0
+}
+
+// isResourceBestEffort returns true if the container's resource requirements are best-effort.
+func isResourceBestEffort(container *api.Container, resource api.ResourceName) bool {
+	// A container resource is best-effort if its request is unspecified or 0.
+	// If a request is specified, then the user expects some kind of resource guarantee.
+	req, hasReq := container.Resources.Requests[resource]
+	return !hasReq || req.Value() == 0
+}
+
+// GetPodQOS returns the QoS class of a pod.
+// A pod is besteffort if none of its containers have specified any requests or limits.
+// A pod is guaranteed only when requests and limits are specified for all the containers and they are equal.
+// A pod is burstable if limits and requests do not match across all containers.
+func GetPodQOS(pod *api.Pod) QOSClass {
+	requests := api.ResourceList{}
+	limits := api.ResourceList{}
+	zeroQuantity := resource.MustParse("0")
+	isGuaranteed := true
+	for _, container := range pod.Spec.Containers {
+		// process requests
+		for name, quantity := range container.Resources.Requests {
+			if quantity.Cmp(zeroQuantity) == 1 {
+				delta := quantity.Copy()
+				if _, exists := requests[name]; !exists {
+					requests[name] = *delta
+				} else {
+					delta.Add(requests[name])
+					requests[name] = *delta
+				}
+			}
+		}
+		// process limits
+		for name, quantity := range container.Resources.Limits {
+			if quantity.Cmp(zeroQuantity) == 1 {
+				delta := quantity.Copy()
+				if _, exists := limits[name]; !exists {
+					limits[name] = *delta
+				} else {
+					delta.Add(limits[name])
+					limits[name] = *delta
+				}
+			}
+		}
+		if len(container.Resources.Limits) != len(supportedComputeResources) {
+			isGuaranteed = false
+		}
+	}
+	if len(requests) == 0 && len(limits) == 0 {
+		return BestEffort
+	}
+	// Check is requests match limits for all resources.
+	if isGuaranteed {
+		for name, req := range requests {
+			if lim, exists := limits[name]; !exists || lim.Cmp(req) != 0 {
+				isGuaranteed = false
+				break
+			}
+		}
+	}
+	if isGuaranteed &&
+		len(requests) == len(limits) &&
+		len(limits) == len(supportedComputeResources) {
+		return Guaranteed
+	}
+	return Burstable
+}
+
+// QOSList is a set of (resource name, QoS class) pairs.
+type QOSList map[api.ResourceName]QOSClass
+
+// GetQOS returns a mapping of resource name to QoS class of a container
+func GetQOS(container *api.Container) QOSList {
+	resourceToQOS := QOSList{}
+	for resource := range allResources(container) {
+		switch {
+		case isResourceGuaranteed(container, resource):
+			resourceToQOS[resource] = Guaranteed
+		case isResourceBestEffort(container, resource):
+			resourceToQOS[resource] = BestEffort
+		default:
+			resourceToQOS[resource] = Burstable
+		}
+	}
+	return resourceToQOS
+}
+
+// supportedComputeResources is the list of supported compute resources
+var supportedComputeResources = []api.ResourceName{
+	api.ResourceCPU,
+	api.ResourceMemory,
+}
+
+// allResources returns a set of all possible resources whose mapped key value is true if present on the container
+func allResources(container *api.Container) map[api.ResourceName]bool {
+	resources := map[api.ResourceName]bool{}
+	for _, resource := range supportedComputeResources {
+		resources[resource] = false
+	}
+	for resource := range container.Resources.Requests {
+		resources[resource] = true
+	}
+	for resource := range container.Resources.Limits {
+		resources[resource] = true
+	}
+	return resources
+}
diff --git a/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/types.go b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/types.go
new file mode 100644
index 0000000..e52dece
--- /dev/null
+++ b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/kubelet/qos/types.go
@@ -0,0 +1,29 @@
+/*
+Copyright 2016 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 qos
+
+// QOSClass defines the supported qos classes of Pods/Containers.
+type QOSClass string
+
+const (
+	// Guaranteed is the Guaranteed qos class.
+	Guaranteed QOSClass = "Guaranteed"
+	// Burstable is the Burstable qos class.
+	Burstable QOSClass = "Burstable"
+	// BestEffort is the BestEffort qos class.
+	BestEffort QOSClass = "BestEffort"
+)