Delete custommetrics

pkg/kubelet/custommetrics/BUILD

-package(default_visibility = ["//visibility:public"])
-
-load(
-    "@io_bazel_rules_go//go:def.bzl",
-    "go_library",
-    "go_test",
-)
-
-go_library(
-    name = "go_default_library",
-    srcs = ["custom_metrics.go"],
-    importpath = "k8s.io/kubernetes/pkg/kubelet/custommetrics",
-    deps = ["//staging/src/k8s.io/api/core/v1:go_default_library"],
-)
-
-go_test(
-    name = "go_default_test",
-    srcs = ["custom_metrics_test.go"],
-    embed = [":go_default_library"],
-    deps = [
-        "//staging/src/k8s.io/api/core/v1:go_default_library",
-        "//vendor/github.com/stretchr/testify/assert:go_default_library",
-    ],
-)
-
-filegroup(
-    name = "package-srcs",
-    srcs = glob(["**"]),
-    tags = ["automanaged"],
-    visibility = ["//visibility:private"],
-)
-
-filegroup(
-    name = "all-srcs",
-    srcs = [":package-srcs"],
-    tags = ["automanaged"],
-)

pkg/kubelet/custommetrics/custom_metrics.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 custommetrics contains support for instrumenting cAdvisor to gather custom metrics from pods.
-package custommetrics
-
-import (
-	"path"
-
-	"k8s.io/api/core/v1"
-)
-
-const (
-	CustomMetricsDefinitionContainerFile = "definition.json"
-
-	CustomMetricsDefinitionDir = "/etc/custom-metrics"
-)
-
-// Alpha implementation.
-// Returns a path to a cAdvisor-specific custom metrics configuration.
-func GetCAdvisorCustomMetricsDefinitionPath(container *v1.Container) (*string, error) {
-	// Assumes that the container has Custom Metrics enabled if it has "/etc/custom-metrics" directory
-	// mounted as a volume. Custom Metrics definition is expected to be in "definition.json".
-	if container.VolumeMounts != nil {
-		for _, volumeMount := range container.VolumeMounts {
-			if path.Clean(volumeMount.MountPath) == path.Clean(CustomMetricsDefinitionDir) {
-				// TODO: add definition file validation.
-				definitionPath := path.Clean(path.Join(volumeMount.MountPath, CustomMetricsDefinitionContainerFile))
-				return &definitionPath, nil
-			}
-		}
-	}
-	// No Custom Metrics definition available.
-	return nil, nil
-}

pkg/kubelet/custommetrics/custom_metrics_test.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 custommetrics
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"k8s.io/api/core/v1"
-)
-
-func TestGetCAdvisorCustomMetricsDefinitionPath(t *testing.T) {
-
-	regularContainer := &v1.Container{
-		Name: "test_container",
-	}
-
-	cmContainer := &v1.Container{
-		Name: "test_container",
-		VolumeMounts: []v1.VolumeMount{
-			{
-				Name:      "cm",
-				MountPath: CustomMetricsDefinitionDir,
-			},
-		},
-	}
-	path, err := GetCAdvisorCustomMetricsDefinitionPath(regularContainer)
-	assert.Nil(t, path)
-	assert.NoError(t, err)
-
-	path, err = GetCAdvisorCustomMetricsDefinitionPath(cmContainer)
-	assert.NotEmpty(t, *path)
-	assert.NoError(t, err)
-}