/
graph.go
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/
graph.go
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/*
* Copyright 2017 IBM Corp.
*
* 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 ofthe 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 specificlanguage governing permissions and
* limitations under the License.
*
*/
package k8s
import (
"github.com/skydive-project/skydive/filters"
"github.com/skydive-project/skydive/graffiti/graph"
"github.com/skydive-project/skydive/probe"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
// Manager is the manager value for Kubernetes
Manager = "k8s"
// KubeKey is the metadata area for k8s specific fields
KubeKey = "K8s"
// ExtraKey is the metadata area for k8s extra fields
ExtraKey = "K8s.Extra"
)
// MetadataField is generates full path of a k8s specific field
func MetadataField(field string) string {
return KubeKey + "." + field
}
// MetadataFields generates full path of a list of k8s specific fields
func MetadataFields(fields ...string) []string {
kubeFields := make([]string, len(fields))
for i, field := range fields {
kubeFields[i] = MetadataField(field)
}
return kubeFields
}
// NewMetadataFields creates internal k8s node metadata struct
func NewMetadataFields(o metav1.Object) graph.Metadata {
m := graph.Metadata{}
m["Name"] = o.GetName()
m["Namespace"] = o.GetNamespace()
m["Labels"] = o.GetLabels()
return m
}
// NewMetadata creates a k8s node base metadata struct
func NewMetadata(manager, ty string, kubeMeta graph.Metadata, extra interface{}, name string) graph.Metadata {
m := graph.Metadata{}
m["Manager"] = manager
m["Type"] = ty
m["Name"] = name
m.SetFieldAndNormalize(KubeKey, map[string]interface{}(kubeMeta))
if extra != nil {
m.SetFieldAndNormalize(ExtraKey, extra)
}
return m
}
// SetState field of node metadata
func SetState(m *graph.Metadata, isUp bool) {
state := "DOWN"
if isUp {
state = "UP"
}
m.SetField("State", state)
}
// NewEdgeMetadata creates a new edge metadata
func NewEdgeMetadata(manager, name string) graph.Metadata {
m := graph.Metadata{
"Manager": manager,
"RelationType": name,
}
return m
}
func newTypesFilter(manager string, types ...string) *filters.Filter {
filtersArray := make([]*filters.Filter, len(types))
for i, ty := range types {
filtersArray[i] = filters.NewTermStringFilter("Type", ty)
}
return filters.NewAndFilter(
filters.NewTermStringFilter("Manager", manager),
filters.NewOrFilter(filtersArray...),
)
}
func newObjectIndexerFromFilter(g *graph.Graph, h graph.ListenerHandler, filter *filters.Filter, indexes ...string) *graph.MetadataIndexer {
filtersArray := make([]*filters.Filter, len(indexes)+1)
filtersArray[0] = filter
for i, index := range indexes {
filtersArray[i+1] = filters.NewNotNullFilter(index)
}
m := graph.NewElementFilter(filters.NewAndFilter(filtersArray...))
return graph.NewMetadataIndexer(g, h, m, indexes...)
}
func newResourceIndexer(g *graph.Graph, manager, ty string, attrs []string) *graph.MetadataIndexer {
cache := GetSubprobe(manager, ty)
if cache == nil {
return nil
}
metadata := graph.Metadata{"Manager": manager, "Type": ty}
indexer := graph.NewMetadataIndexer(g, cache, metadata, attrs...)
indexer.Start()
return indexer
}
func newResourceLinker(g *graph.Graph, srcIndexer, dstIndexer *graph.MetadataIndexer, edgeMetadata graph.Metadata) probe.Handler {
if srcIndexer == nil || dstIndexer == nil {
return nil
}
ml := graph.NewMetadataIndexerLinker(g, srcIndexer, dstIndexer, edgeMetadata)
linker := &Linker{
ResourceLinker: ml.ResourceLinker,
}
ml.AddEventListener(linker)
return linker
}
func objectToNode(g *graph.Graph, object metav1.Object) (node *graph.Node) {
return g.GetNode(graph.Identifier(object.GetUID()))
}
func objectsToNodes(g *graph.Graph, objects []metav1.Object) (nodes []*graph.Node) {
for _, obj := range objects {
if node := objectToNode(g, obj); node != nil {
nodes = append(nodes, node)
}
}
return
}