Port the downward api test to the node e2e suite

Also extend the framework to allow a custom client config loading function, so
that the node e2e suite can reuse the same framework across tests.

test/e2e_node/downward_api_test.go

@@ -0,0 +1,164 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/resource"
+	"k8s.io/kubernetes/pkg/util"
+	"k8s.io/kubernetes/test/e2e/framework"
+
+	. "github.com/onsi/ginkgo"
+)
+
+// Ported from test/e2e/downard_api_test.go
+
+var _ = framework.KubeDescribe("Downward API", func() {
+	f := NewDefaultFramework("downward-api")
+	It("should provide pod name and namespace as env vars [Conformance]", func() {
+		podName := "downward-api-" + string(util.NewUUID())
+		env := []api.EnvVar{
+			{
+				Name: "POD_NAME",
+				ValueFrom: &api.EnvVarSource{
+					FieldRef: &api.ObjectFieldSelector{
+						APIVersion: "v1",
+						FieldPath:  "metadata.name",
+					},
+				},
+			},
+			{
+				Name: "POD_NAMESPACE",
+				ValueFrom: &api.EnvVarSource{
+					FieldRef: &api.ObjectFieldSelector{
+						APIVersion: "v1",
+						FieldPath:  "metadata.namespace",
+					},
+				},
+			},
+		}
+
+		expectations := []string{
+			fmt.Sprintf("POD_NAME=%v", podName),
+			fmt.Sprintf("POD_NAMESPACE=%v", f.Namespace.Name),
+		}
+
+		testDownwardAPI(f, podName, env, expectations)
+	})
+
+	It("should provide pod IP as an env var", func() {
+		podName := "downward-api-" + string(util.NewUUID())
+		env := []api.EnvVar{
+			{
+				Name: "POD_IP",
+				ValueFrom: &api.EnvVarSource{
+					FieldRef: &api.ObjectFieldSelector{
+						APIVersion: "v1",
+						FieldPath:  "status.podIP",
+					},
+				},
+			},
+		}
+
+		expectations := []string{
+			"POD_IP=(?:\\d+)\\.(?:\\d+)\\.(?:\\d+)\\.(?:\\d+)",
+		}
+
+		testDownwardAPI(f, podName, env, expectations)
+	})
+
+	It("should provide container's limits.cpu/memory and requests.cpu/memory as env vars", func() {
+		podName := "downward-api-" + string(util.NewUUID())
+		env := []api.EnvVar{
+			{
+				Name: "CPU_LIMIT",
+				ValueFrom: &api.EnvVarSource{
+					ResourceFieldRef: &api.ResourceFieldSelector{
+						Resource: "limits.cpu",
+					},
+				},
+			},
+			{
+				Name: "MEMORY_LIMIT",
+				ValueFrom: &api.EnvVarSource{
+					ResourceFieldRef: &api.ResourceFieldSelector{
+						Resource: "limits.memory",
+					},
+				},
+			},
+			{
+				Name: "CPU_REQUEST",
+				ValueFrom: &api.EnvVarSource{
+					ResourceFieldRef: &api.ResourceFieldSelector{
+						Resource: "requests.cpu",
+					},
+				},
+			},
+			{
+				Name: "MEMORY_REQUEST",
+				ValueFrom: &api.EnvVarSource{
+					ResourceFieldRef: &api.ResourceFieldSelector{
+						Resource: "requests.memory",
+					},
+				},
+			},
+		}
+		expectations := []string{
+			fmt.Sprintf("CPU_LIMIT=2"),
+			fmt.Sprintf("MEMORY_LIMIT=67108864"),
+			fmt.Sprintf("CPU_REQUEST=1"),
+			fmt.Sprintf("MEMORY_REQUEST=33554432"),
+		}
+
+		testDownwardAPI(f, podName, env, expectations)
+	})
+})
+
+func testDownwardAPI(f *framework.Framework, podName string, env []api.EnvVar, expectations []string) {
+	pod := &api.Pod{
+		ObjectMeta: api.ObjectMeta{
+			Name:   podName,
+			Labels: map[string]string{"name": podName},
+		},
+		Spec: api.PodSpec{
+			Containers: []api.Container{
+				{
+					Name:    "dapi-container",
+					Image:   "gcr.io/google_containers/busybox:1.24",
+					Command: []string{"sh", "-c", "env"},
+					Resources: api.ResourceRequirements{
+						Requests: api.ResourceList{
+							api.ResourceCPU:    resource.MustParse("250m"),
+							api.ResourceMemory: resource.MustParse("32Mi"),
+						},
+						Limits: api.ResourceList{
+							api.ResourceCPU:    resource.MustParse("1250m"),
+							api.ResourceMemory: resource.MustParse("64Mi"),
+						},
+					},
+					Env: env,
+				},
+			},
+			RestartPolicy: api.RestartPolicyNever,
+		},
+	}
+	assignPodToNode(pod)
+
+	f.TestContainerOutputRegexp("downward api env vars", pod, 0, expectations)
+}