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kubelet: remove unused custommetrics package
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/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package custommetrics contains support for instrumenting cAdvisor to gather custom metrics from pods.
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package custommetrics
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import (
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"path"
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"k8s.io/api/core/v1"
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)
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const (
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// CustomMetricsDefinitionContainerFile is the file in container that stores Custom Metrics definition
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CustomMetricsDefinitionContainerFile = "definition.json"
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// CustomMetricsDefinitionDir is the dir where Custom Metrics definition is stored
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CustomMetricsDefinitionDir = "/etc/custom-metrics"
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)
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// GetCAdvisorCustomMetricsDefinitionPath returns a path to a cAdvisor-specific custom metrics configuration.
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// Alpha implementation.
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func GetCAdvisorCustomMetricsDefinitionPath(container *v1.Container) (*string, error) {
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// Assumes that the container has Custom Metrics enabled if it has "/etc/custom-metrics" directory
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// mounted as a volume. Custom Metrics definition is expected to be in "definition.json".
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if container.VolumeMounts != nil {
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for _, volumeMount := range container.VolumeMounts {
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if path.Clean(volumeMount.MountPath) == path.Clean(CustomMetricsDefinitionDir) {
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// TODO: add definition file validation.
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definitionPath := path.Clean(path.Join(volumeMount.MountPath, CustomMetricsDefinitionContainerFile))
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return &definitionPath, nil
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}
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}
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}
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// No Custom Metrics definition available.
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return nil, nil
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}
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@ -1,48 +0,0 @@
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/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package custommetrics
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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"k8s.io/api/core/v1"
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)
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func TestGetCAdvisorCustomMetricsDefinitionPath(t *testing.T) {
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regularContainer := &v1.Container{
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Name: "test_container",
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}
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cmContainer := &v1.Container{
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Name: "test_container",
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VolumeMounts: []v1.VolumeMount{
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{
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Name: "cm",
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MountPath: CustomMetricsDefinitionDir,
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},
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},
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}
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path, err := GetCAdvisorCustomMetricsDefinitionPath(regularContainer)
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assert.Nil(t, path)
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assert.NoError(t, err)
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path, err = GetCAdvisorCustomMetricsDefinitionPath(cmContainer)
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assert.NotEmpty(t, *path)
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assert.NoError(t, err)
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}
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