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hostname.go
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hostname.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 modelprocessor
import (
"context"
"github.com/elastic/apm-server/model"
)
// SetHostHostname is a transform.Processor that sets the final
// host.name and host.hostname values, according to whether the
// event originated from within Kubernetes or not.
type SetHostHostname struct{}
// ProcessBatch sets or overrides the host.name and host.hostname fields for events.
func (SetHostHostname) ProcessBatch(ctx context.Context, b *model.Batch) error {
for i := range *b {
setHostHostname(&(*b)[i])
}
return nil
}
func setHostHostname(event *model.APMEvent) {
switch {
case event.Kubernetes.NodeName != "":
// host.kubernetes.node.name is set: set host.hostname to its value.
event.Host.Hostname = event.Kubernetes.NodeName
case event.Kubernetes.PodName != "" || event.Kubernetes.PodUID != "" || event.Kubernetes.Namespace != "":
// kubernetes.* is set, but kubernetes.node.name is not: don't set host.hostname at all.
event.Host.Hostname = ""
default:
// Otherwise use the originally specified host.hostname value.
}
if event.Host.Name == "" {
event.Host.Name = event.Host.Hostname
}
}