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labels.go
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/
labels.go
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// Copyright 2015 Google Inc. 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 core
// Definition of labels supported in MetricSet.
var (
LabelMetricSetType = LabelDescriptor{
Key: "type",
Description: "Type of the metrics set (container, pod, namespace, node, cluster)",
}
MetricSetTypeSystemContainer = "sys_container"
MetricSetTypePodContainer = "pod_container"
MetricSetTypePod = "pod"
MetricSetTypeNamespace = "ns"
MetricSetTypeNode = "node"
MetricSetTypeCluster = "cluster"
LabelPodId = LabelDescriptor{
Key: "pod_id",
Description: "The unique ID of the pod",
}
LabelPodName = LabelDescriptor{
Key: "pod_name",
Description: "The name of the pod",
}
// Deprecated label
LabelPodNamespace = LabelDescriptor{
Key: "pod_namespace",
Description: "The namespace of the pod",
}
LabelNamespaceName = LabelDescriptor{
Key: "namespace_name",
Description: "The name of the namespace",
}
LabelPodNamespaceUID = LabelDescriptor{
Key: "namespace_id",
Description: "The UID of namespace of the pod",
}
LabelContainerName = LabelDescriptor{
Key: "container_name",
Description: "User-provided name of the container or full container name for system containers",
}
LabelLabels = LabelDescriptor{
Key: "labels",
Description: "Comma-separated list of user-provided labels",
}
LabelNodename = LabelDescriptor{
Key: "nodename",
Description: "nodename where the container ran",
}
LabelHostname = LabelDescriptor{
Key: "hostname",
Description: "Hostname where the container ran",
}
LabelResourceID = LabelDescriptor{
Key: "resource_id",
Description: "Identifier(s) specific to a metric",
}
LabelHostID = LabelDescriptor{
Key: "host_id",
Description: "Identifier specific to a host. Set by cloud provider or user",
}
LabelContainerBaseImage = LabelDescriptor{
Key: "container_base_image",
Description: "User-defined image name that is run inside the container",
}
// The label is populated only for GCM
LabelCustomMetricName = LabelDescriptor{
Key: "custom_metric_name",
Description: "User-defined name of the exported custom metric",
}
LabelGCEResourceID = LabelDescriptor{
Key: "compute.googleapis.com/resource_id",
Description: "Resource id for nodes specific for GCE.",
}
LabelGCEResourceType = LabelDescriptor{
Key: "compute.googleapis.com/resource_type",
Description: "Resource types for nodes specific for GCE.",
}
)
type LabelDescriptor struct {
// Key to use for the label.
Key string `json:"key,omitempty"`
// Description of the label.
Description string `json:"description,omitempty"`
}
var commonLabels = []LabelDescriptor{
LabelNodename,
LabelHostname,
LabelHostID,
}
var containerLabels = []LabelDescriptor{
LabelContainerName,
LabelContainerBaseImage,
}
var podLabels = []LabelDescriptor{
LabelPodName,
LabelPodId,
LabelPodNamespace,
// TODO: Enable label once it is supported by NamespaceEnricher
// LabelPodNamespaceUID,
LabelLabels,
}
var metricLabels = []LabelDescriptor{
LabelResourceID,
}
var customMetricLabels = []LabelDescriptor{
LabelCustomMetricName,
}
// Labels exported to GCM. The number of labels that can be exported to GCM is limited by 10.
var gcmLabels = []LabelDescriptor{
LabelMetricSetType,
LabelPodName,
LabelNamespaceName,
LabelHostname,
LabelHostID,
LabelContainerName,
LabelContainerBaseImage,
LabelCustomMetricName,
}
var gcmNodeAutoscalingLabels = []LabelDescriptor{
LabelGCEResourceID,
LabelGCEResourceType,
LabelHostname,
}
func CommonLabels() []LabelDescriptor {
result := make([]LabelDescriptor, len(commonLabels))
copy(result, commonLabels)
return result
}
func ContainerLabels() []LabelDescriptor {
result := make([]LabelDescriptor, len(containerLabels))
copy(result, containerLabels)
return result
}
func PodLabels() []LabelDescriptor {
result := make([]LabelDescriptor, len(podLabels))
copy(result, podLabels)
return result
}
func MetricLabels() []LabelDescriptor {
result := make([]LabelDescriptor, len(metricLabels)+len(customMetricLabels))
copy(result, metricLabels)
copy(result, customMetricLabels)
return result
}
func SupportedLabels() []LabelDescriptor {
result := CommonLabels()
result = append(result, PodLabels()...)
return append(result, MetricLabels()...)
}
func GcmLabels() map[string]LabelDescriptor {
result := make(map[string]LabelDescriptor, len(gcmLabels))
for _, l := range gcmLabels {
result[l.Key] = l
}
return result
}
func GcmNodeAutoscalingLabels() map[string]LabelDescriptor {
result := make(map[string]LabelDescriptor, len(gcmNodeAutoscalingLabels))
for _, l := range gcmNodeAutoscalingLabels {
result[l.Key] = l
}
return result
}