/
service.go
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/
service.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 metadata
import (
k8s "k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
"github.com/elastic/elastic-agent-autodiscover/kubernetes"
"github.com/elastic/elastic-agent-libs/config"
"github.com/elastic/elastic-agent-libs/mapstr"
"github.com/elastic/elastic-agent-libs/safemapstr"
)
type service struct {
store cache.Store
resource *Resource
}
// NewServiceMetadataGenerator creates a metagen for service resources
func NewServiceMetadataGenerator(cfg *config.C, services cache.Store, namespace MetaGen, client k8s.Interface) MetaGen {
return &service{
resource: NewNamespaceAwareResourceMetadataGenerator(cfg, client, namespace),
store: services,
}
}
// Generate generates service metadata from a resource object
// Metadata map is in the following form:
//
// {
// "kubernetes": {},
// "some.ecs.field": "asdf"
// }
//
// All Kubernetes fields that need to be stored under kuberentes. prefix are populetad by
// GenerateK8s method while fields that are part of ECS are generated by GenerateECS method
func (s *service) Generate(obj kubernetes.Resource, opts ...FieldOptions) mapstr.M {
ecsFields := s.GenerateECS(obj)
meta := mapstr.M{
"kubernetes": s.GenerateK8s(obj, opts...),
}
meta.DeepUpdate(ecsFields)
return meta
}
// GenerateECS generates service ECS metadata from a resource object
func (s *service) GenerateECS(obj kubernetes.Resource) mapstr.M {
return s.resource.GenerateECS(obj)
}
// GenerateK8s generates service metadata from a resource object
func (s *service) GenerateK8s(obj kubernetes.Resource, opts ...FieldOptions) mapstr.M {
svc, ok := obj.(*kubernetes.Service)
if !ok {
return nil
}
out := s.resource.GenerateK8s("service", obj, opts...)
selectors := svc.Spec.Selector
if len(selectors) == 0 {
return out
}
svcMap := GenerateMap(selectors, s.resource.config.LabelsDedot)
if len(svcMap) != 0 {
_ = safemapstr.Put(out, "selectors", svcMap)
}
return out
}
// GenerateFromName generates pod metadata from a service name
func (s *service) GenerateFromName(name string, opts ...FieldOptions) mapstr.M {
if s.store == nil {
return nil
}
if obj, ok, _ := s.store.GetByKey(name); ok {
svc, ok := obj.(*kubernetes.Service)
if !ok {
return nil
}
return s.GenerateK8s(svc, opts...)
}
return nil
}