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provider.go
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provider.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
// Package k8s contains the Kubernetes hostname provider
package k8s // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/hostmetadata/internal/k8s"
import (
"context"
"fmt"
"github.com/DataDog/opentelemetry-mapping-go/pkg/otlp/attributes/source"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/hostmetadata/provider"
)
var _ source.Provider = (*Provider)(nil)
type Provider struct {
logger *zap.Logger
nodeNameProvider nodeNameProvider
clusterNameProvider provider.ClusterNameProvider
}
// Hostname returns the Kubernetes node name followed by the cluster name if available.
func (p *Provider) Source(ctx context.Context) (source.Source, error) {
nodeName, err := p.nodeNameProvider.NodeName(ctx)
if err != nil {
return source.Source{}, fmt.Errorf("node name not available: %w", err)
}
clusterName, err := p.clusterNameProvider.ClusterName(ctx)
if err != nil {
p.logger.Debug("failed to get valid cluster name", zap.Error(err))
return source.Source{Kind: source.HostnameKind, Identifier: nodeName}, nil
}
return source.Source{Kind: source.HostnameKind, Identifier: fmt.Sprintf("%s-%s", nodeName, clusterName)}, nil
}
// NewProvider creates a new Kubernetes hostname provider.
func NewProvider(logger *zap.Logger, clusterProvider provider.ClusterNameProvider) (*Provider, error) {
return &Provider{
logger: logger,
nodeNameProvider: newNodeNameProvider(),
clusterNameProvider: clusterProvider,
}, nil
}