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processor.go
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processor.go
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// Copyright 2020 OpenTelemetry 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 k8sprocessor
import (
"context"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer/pdata"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/internal/k8sconfig"
"github.com/open-telemetry/opentelemetry-collector-contrib/processor/k8sprocessor/kube"
)
const (
k8sIPLabelName string = "k8s.pod.ip"
clientIPLabelName string = "ip"
)
type kubernetesprocessor struct {
logger *zap.Logger
apiConfig k8sconfig.APIConfig
kc kube.Client
passthroughMode bool
rules kube.ExtractionRules
filters kube.Filters
podAssociations []kube.Association
}
func (kp *kubernetesprocessor) initKubeClient(logger *zap.Logger, kubeClient kube.ClientProvider) error {
if kubeClient == nil {
kubeClient = kube.New
}
if !kp.passthroughMode {
kc, err := kubeClient(logger, kp.apiConfig, kp.rules, kp.filters, kp.podAssociations, nil, nil)
if err != nil {
return err
}
kp.kc = kc
}
return nil
}
func (kp *kubernetesprocessor) Start(_ context.Context, _ component.Host) error {
if !kp.passthroughMode {
go kp.kc.Start()
}
return nil
}
func (kp *kubernetesprocessor) Shutdown(context.Context) error {
if !kp.passthroughMode {
kp.kc.Stop()
}
return nil
}
// ProcessTraces process traces and add k8s metadata using resource IP or incoming IP as pod origin.
func (kp *kubernetesprocessor) ProcessTraces(ctx context.Context, td pdata.Traces) (pdata.Traces, error) {
rss := td.ResourceSpans()
for i := 0; i < rss.Len(); i++ {
kp.processResource(ctx, rss.At(i).Resource())
}
return td, nil
}
// ProcessMetrics process metrics and add k8s metadata using resource IP, hostname or incoming IP as pod origin.
func (kp *kubernetesprocessor) ProcessMetrics(ctx context.Context, md pdata.Metrics) (pdata.Metrics, error) {
rm := md.ResourceMetrics()
for i := 0; i < rm.Len(); i++ {
kp.processResource(ctx, rm.At(i).Resource())
}
return md, nil
}
// ProcessLogs process logs and add k8s metadata using resource IP, hostname or incoming IP as pod origin.
func (kp *kubernetesprocessor) ProcessLogs(ctx context.Context, ld pdata.Logs) (pdata.Logs, error) {
rl := ld.ResourceLogs()
for i := 0; i < rl.Len(); i++ {
kp.processResource(ctx, rl.At(i).Resource())
}
return ld, nil
}
// processResource adds Pod metadata tags to resource based on pod association configuration
func (kp *kubernetesprocessor) processResource(ctx context.Context, resource pdata.Resource) {
podIdentifierKey, podIdentifierValue := extractPodID(ctx, resource.Attributes(), kp.podAssociations)
if podIdentifierKey == "" {
return
}
resource.Attributes().InsertString(podIdentifierKey, string(podIdentifierValue))
if kp.passthroughMode {
return
}
attrsToAdd := kp.getAttributesForPod(podIdentifierValue)
for key, val := range attrsToAdd {
resource.Attributes().InsertString(key, val)
}
}
func (kp *kubernetesprocessor) getAttributesForPod(identifier kube.PodIdentifier) map[string]string {
pod, ok := kp.kc.GetPod(identifier)
if !ok {
return nil
}
return pod.Attributes
}