mirror of https://github.com/knative/caching.git
117 lines
3.9 KiB
Go
117 lines
3.9 KiB
Go
// Copyright 2019, OpenCensus Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package stackdriver // import "contrib.go.opencensus.io/exporter/stackdriver"
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import (
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"fmt"
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"go.opencensus.io/resource"
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"go.opencensus.io/resource/resourcekeys"
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monitoredrespb "google.golang.org/genproto/googleapis/api/monitoredres"
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)
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type resourceMap struct {
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// Mapping from the input resource type to the monitored resource type in Stackdriver.
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srcType, dstType string
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// Mapping from Stackdriver monitored resource label to an OpenCensus resource label.
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labels map[string]string
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}
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// Resource labels that are generally internal to the exporter.
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// Consider exposing these labels and a type identifier in the future to allow
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// for customization.
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const (
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stackdriverLocation = "contrib.opencensus.io/exporter/stackdriver/location"
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stackdriverProjectID = "contrib.opencensus.io/exporter/stackdriver/project_id"
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stackdriverGenericTaskNamespace = "contrib.opencensus.io/exporter/stackdriver/generic_task/namespace"
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stackdriverGenericTaskJob = "contrib.opencensus.io/exporter/stackdriver/generic_task/job"
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stackdriverGenericTaskID = "contrib.opencensus.io/exporter/stackdriver/generic_task/task_id"
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)
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// Mappings for the well-known OpenCensus resources to applicable Stackdriver resources.
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var k8sResourceMap = map[string]string{
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"project_id": stackdriverProjectID,
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"location": resourcekeys.CloudKeyZone,
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"cluster_name": resourcekeys.K8SKeyClusterName,
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"namespace_name": resourcekeys.K8SKeyNamespaceName,
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"pod_name": resourcekeys.K8SKeyPodName,
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"container_name": resourcekeys.ContainerKeyName,
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}
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var gcpResourceMap = map[string]string{
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"project_id": stackdriverProjectID,
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"instance_id": resourcekeys.HostKeyID,
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"zone": resourcekeys.CloudKeyZone,
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}
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var awsResourceMap = map[string]string{
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"project_id": stackdriverProjectID,
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"instance_id": resourcekeys.HostKeyID,
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"region": resourcekeys.CloudKeyRegion,
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"aws_account": resourcekeys.CloudKeyAccountID,
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}
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// Generic task resource.
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var genericResourceMap = map[string]string{
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"project_id": stackdriverProjectID,
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"location": stackdriverLocation,
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"namespace": stackdriverGenericTaskNamespace,
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"job": stackdriverGenericTaskJob,
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"task_id": stackdriverGenericTaskID,
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}
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func transformResource(match, input map[string]string) map[string]string {
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output := make(map[string]string, len(input))
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for dst, src := range match {
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if v, ok := input[src]; ok {
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output[dst] = v
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}
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}
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return output
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}
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func defaultMapResource(res *resource.Resource) *monitoredrespb.MonitoredResource {
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match := genericResourceMap
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result := &monitoredrespb.MonitoredResource{
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Type: "global",
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}
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if res == nil || res.Labels == nil {
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return result
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}
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switch {
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case res.Type == resourcekeys.ContainerType:
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result.Type = "k8s_container"
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match = k8sResourceMap
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case res.Type == resourcekeys.K8SType:
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result.Type = "k8s_pod"
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match = k8sResourceMap
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case res.Labels[resourcekeys.CloudKeyProvider] == resourcekeys.CloudProviderGCP:
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result.Type = "gce_instance"
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match = gcpResourceMap
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case res.Labels[resourcekeys.CloudKeyProvider] == resourcekeys.CloudProviderAWS:
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result.Type = "aws_ec2_instance"
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match = awsResourceMap
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}
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result.Labels = transformResource(match, res.Labels)
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if result.Type == "aws_ec2_instance" {
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if v, ok := result.Labels["region"]; ok {
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result.Labels["region"] = fmt.Sprintf("aws:%s", v)
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}
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}
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return result
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}
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