adding an e2e for GPUs

Signed-off-by: Vishnu kannan <vishnuk@google.com>

hack/verify-flags/known-flags.txt

@@ -686,3 +686,4 @@ windows-line-endings
 www-prefix
 zone-id
 zone-name
+

pkg/kubelet/BUILD

@@ -58,6 +58,8 @@ go_library(
         "//pkg/kubelet/envvars:go_default_library",
         "//pkg/kubelet/events:go_default_library",
         "//pkg/kubelet/eviction:go_default_library",
+        "//pkg/kubelet/gpu:go_default_library",
+        "//pkg/kubelet/gpu/nvidia:go_default_library",
         "//pkg/kubelet/images:go_default_library",
         "//pkg/kubelet/kuberuntime:go_default_library",
         "//pkg/kubelet/lifecycle:go_default_library",
@@ -169,6 +171,7 @@ go_test(
         "//pkg/kubelet/container:go_default_library",
         "//pkg/kubelet/container/testing:go_default_library",
         "//pkg/kubelet/eviction:go_default_library",
+        "//pkg/kubelet/gpu:go_default_library",
         "//pkg/kubelet/images:go_default_library",
         "//pkg/kubelet/lifecycle:go_default_library",
         "//pkg/kubelet/network:go_default_library",
@@ -246,6 +249,7 @@ filegroup(
         "//pkg/kubelet/envvars:all-srcs",
         "//pkg/kubelet/events:all-srcs",
         "//pkg/kubelet/eviction:all-srcs",
+        "//pkg/kubelet/gpu:all-srcs",
         "//pkg/kubelet/images:all-srcs",
         "//pkg/kubelet/kuberuntime:all-srcs",
         "//pkg/kubelet/leaky:all-srcs",

pkg/kubelet/gpu/BUILD

@@ -0,0 +1,34 @@
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "gpu_manager_stub.go",
+        "types.go",
+    ],
+    tags = ["automanaged"],
+    deps = ["//pkg/api/v1:go_default_library"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [
+        ":package-srcs",
+        "//pkg/kubelet/gpu/nvidia:all-srcs",
+    ],
+    tags = ["automanaged"],
+)

pkg/kubelet/gpu/nvidia/BUILD

@@ -0,0 +1,38 @@
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "helpers.go",
+        "nvidia_gpu_manager.go",
+    ],
+    tags = ["automanaged"],
+    deps = [
+        "//pkg/api/v1:go_default_library",
+        "//pkg/kubelet/dockertools:go_default_library",
+        "//pkg/kubelet/gpu:go_default_library",
+        "//vendor:github.com/golang/glog",
+        "//vendor:k8s.io/apimachinery/pkg/api/resource",
+        "//vendor:k8s.io/apimachinery/pkg/util/sets",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)

test/e2e/framework/pods.go

@@ -224,7 +224,7 @@ func (c *PodClient) WaitForErrorEventOrSuccess(pod *v1.Pod) (*v1.Event, error) {
 	return ev, err
 }
 
-// MatchContainerOutput gest output of a container and match expected regexp in the output.
+// MatchContainerOutput gets output of a container and match expected regexp in the output.
 func (c *PodClient) MatchContainerOutput(name string, containerName string, expectedRegexp string) error {
 	f := c.f
 	output, err := GetPodLogs(f.ClientSet, f.Namespace.Name, name, containerName)

test/e2e_node/BUILD

@@ -14,6 +14,7 @@ go_library(
         "benchmark_util.go",
         "container.go",
         "doc.go",
+        "gpus.go",
         "image_list.go",
         "resource_collector.go",
         "simple_mount.go",
@@ -37,12 +38,14 @@ go_library(
         "//vendor:github.com/onsi/gomega",
         "//vendor:github.com/opencontainers/runc/libcontainer/cgroups",
         "//vendor:k8s.io/apimachinery/pkg/api/errors",
+        "//vendor:k8s.io/apimachinery/pkg/api/resource",
         "//vendor:k8s.io/apimachinery/pkg/apis/meta/v1",
         "//vendor:k8s.io/apimachinery/pkg/labels",
         "//vendor:k8s.io/apimachinery/pkg/util/runtime",
         "//vendor:k8s.io/apimachinery/pkg/util/sets",
         "//vendor:k8s.io/apimachinery/pkg/util/uuid",
         "//vendor:k8s.io/apimachinery/pkg/util/wait",
+        "//vendor:k8s.io/client-go/pkg/api",
     ],
 )
 

test/e2e_node/gpus.go

@@ -0,0 +1,135 @@
+/*
+Copyright 2017 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 e2e_node
+
+import (
+	"fmt"
+	"time"
+
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/pkg/api"
+	"k8s.io/kubernetes/pkg/api/v1"
+	"k8s.io/kubernetes/pkg/apis/componentconfig"
+	"k8s.io/kubernetes/test/e2e/framework"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+const acceleratorsFeatureGate = "Accelerators=true"
+
+// Serial because the test updates kubelet configuration.
+var _ = framework.KubeDescribe("GPU [Serial]", func() {
+	f := framework.NewDefaultFramework("gpu-test")
+	Context("attempt to use GPUs if available", func() {
+		It("setup the node and create pods to test gpus", func() {
+			By("ensuring that dynamic kubelet configuration is enabled")
+			enabled, err := isKubeletConfigEnabled(f)
+			framework.ExpectNoError(err)
+			if !enabled {
+				Skip("Dynamic Kubelet configuration is not enabled. Skipping test.")
+			}
+
+			By("enabling support for GPUs")
+			var oldCfg *componentconfig.KubeletConfiguration
+			defer func() {
+				if oldCfg != nil {
+					framework.ExpectNoError(setKubeletConfiguration(f, oldCfg))
+				}
+			}()
+
+			oldCfg, err = getCurrentKubeletConfig()
+			framework.ExpectNoError(err)
+			clone, err := api.Scheme.DeepCopy(oldCfg)
+			framework.ExpectNoError(err)
+			newCfg := clone.(*componentconfig.KubeletConfiguration)
+			if newCfg.FeatureGates != "" {
+				newCfg.FeatureGates = fmt.Sprintf("%s,%s", acceleratorsFeatureGate, newCfg.FeatureGates)
+			} else {
+				newCfg.FeatureGates = acceleratorsFeatureGate
+			}
+			framework.ExpectNoError(setKubeletConfiguration(f, newCfg))
+
+			By("Getting the local node object from the api server")
+			nodeList, err := f.ClientSet.Core().Nodes().List(metav1.ListOptions{})
+			framework.ExpectNoError(err, "getting node list")
+			Expect(len(nodeList.Items)).To(Equal(1))
+			node := nodeList.Items[0]
+			gpusAvailable := node.Status.Capacity.NvidiaGPU()
+			By("Skipping the test if GPUs aren't available")
+			if gpusAvailable.IsZero() {
+				Skip("No GPUs available on local node. Skipping test.")
+			}
+
+			By("Creating a pod that will consume all GPUs")
+			podSuccess := makePod(gpusAvailable.Value(), "gpus-success")
+			podSuccess = f.PodClient().CreateSync(podSuccess)
+
+			By("Checking if the pod outputted Success to its logs")
+			framework.ExpectNoError(f.PodClient().MatchContainerOutput(podSuccess.Name, podSuccess.Name, "Success"))
+
+			By("Creating a new pod requesting a GPU and noticing that it is rejected by the Kubelet")
+			podFailure := makePod(1, "gpu-failure")
+			framework.WaitForPodCondition(f.ClientSet, f.Namespace.Name, podFailure.Name, "pod rejected", framework.PodStartTimeout, func(pod *v1.Pod) (bool, error) {
+				if pod.Status.Phase == v1.PodFailed {
+					return true, nil
+
+				}
+				return false, nil
+			})
+
+			By("stopping the original Pod with GPUs")
+			gp := int64(0)
+			deleteOptions := metav1.DeleteOptions{
+				GracePeriodSeconds: &gp,
+			}
+			f.PodClient().DeleteSync(podSuccess.Name, &deleteOptions, 30*time.Second)
+
+			By("attempting to start the failed pod again")
+			f.PodClient().DeleteSync(podFailure.Name, &deleteOptions, 10*time.Second)
+			podFailure = f.PodClient().CreateSync(podFailure)
+
+			By("Checking if the pod outputted Success to its logs")
+			framework.ExpectNoError(f.PodClient().MatchContainerOutput(podFailure.Name, podFailure.Name, "Success"))
+		})
+	})
+})
+
+func makePod(gpus int64, name string) *v1.Pod {
+	resources := v1.ResourceRequirements{
+		Limits: v1.ResourceList{
+			v1.ResourceNvidiaGPU: *resource.NewQuantity(gpus, resource.DecimalSI),
+		},
+	}
+	gpuverificationCmd := fmt.Sprintf("if [[ %d -ne $(ls /dev/ | egrep '^nvidia[0-9]+$') ]]; then exit 1; fi; echo Success; sleep 10240 ", gpus)
+	return &v1.Pod{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: name,
+		},
+		Spec: v1.PodSpec{
+			Containers: []v1.Container{
+				{
+					Image:     "gcr.io/google_containers/busybox:1.24",
+					Name:      name,
+					Command:   []string{"sh", "-c", gpuverificationCmd},
+					Resources: resources,
+				},
+			},
+		},
+	}
+}