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indexers.go
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/
indexers.go
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package add_kubernetes_metadata
import (
"fmt"
"sync"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/libbeat/common/kubernetes"
"github.com/elastic/beats/libbeat/logp"
)
const (
ContainerIndexerName = "container"
PodNameIndexerName = "pod_name"
IPPortIndexerName = "ip_port"
)
// Indexer take known pods and generate all the metadata we need to enrich
// events in a efficient way. By preindexing the metadata in the way it will be
// checked when matching events
type Indexer interface {
// GetMetadata generates event metadata for the given pod, then returns the
// list of indexes to create, with the metadata to put on them
GetMetadata(pod *kubernetes.Pod) []MetadataIndex
// GetIndexes return the list of indexes the given pod belongs to. This function
// must return the same indexes than GetMetadata
GetIndexes(pod *kubernetes.Pod) []string
}
// MetadataIndex holds a pair of index -> metadata info
type MetadataIndex struct {
Index string
Data common.MapStr
}
type Indexers struct {
sync.RWMutex
indexers []Indexer
}
// IndexerConstructor builds a new indexer from its settings
type IndexerConstructor func(config common.Config, metaGen kubernetes.MetaGenerator) (Indexer, error)
// NewIndexers builds indexers object
func NewIndexers(configs PluginConfig, metaGen kubernetes.MetaGenerator) *Indexers {
indexers := []Indexer{}
for _, pluginConfigs := range configs {
for name, pluginConfig := range pluginConfigs {
indexFunc := Indexing.GetIndexer(name)
if indexFunc == nil {
logp.Warn("Unable to find indexing plugin %s", name)
continue
}
indexer, err := indexFunc(pluginConfig, metaGen)
if err != nil {
logp.Warn("Unable to initialize indexing plugin %s due to error %v", name, err)
}
indexers = append(indexers, indexer)
}
}
return &Indexers{
indexers: indexers,
}
}
// GetIndexes returns the composed index list from all registered indexers
func (i *Indexers) GetIndexes(pod *kubernetes.Pod) []string {
var indexes []string
i.RLock()
defer i.RUnlock()
for _, indexer := range i.indexers {
for _, i := range indexer.GetIndexes(pod) {
indexes = append(indexes, i)
}
}
return indexes
}
// GetMetadata returns the composed metadata list from all registered indexers
func (i *Indexers) GetMetadata(pod *kubernetes.Pod) []MetadataIndex {
var metadata []MetadataIndex
i.RLock()
defer i.RUnlock()
for _, indexer := range i.indexers {
for _, m := range indexer.GetMetadata(pod) {
metadata = append(metadata, m)
}
}
return metadata
}
// Empty returns true if indexers list is empty
func (i *Indexers) Empty() bool {
if len(i.indexers) == 0 {
return true
}
return false
}
// PodNameIndexer implements default indexer based on pod name
type PodNameIndexer struct {
metaGen kubernetes.MetaGenerator
}
// NewPodNameIndexer initializes and returns a PodNameIndexer
func NewPodNameIndexer(_ common.Config, metaGen kubernetes.MetaGenerator) (Indexer, error) {
return &PodNameIndexer{metaGen: metaGen}, nil
}
// GetMetadata returns metadata for the given pod, if it matches the index
func (p *PodNameIndexer) GetMetadata(pod *kubernetes.Pod) []MetadataIndex {
data := p.metaGen.PodMetadata(pod)
return []MetadataIndex{
{
Index: fmt.Sprintf("%s/%s", pod.Metadata.Namespace, pod.Metadata.Name),
Data: data,
},
}
}
// GetIndexes returns the indexes for the given Pod
func (p *PodNameIndexer) GetIndexes(pod *kubernetes.Pod) []string {
return []string{fmt.Sprintf("%s/%s", pod.Metadata.Namespace, pod.Metadata.Name)}
}
// ContainerIndexer indexes pods based on all their containers IDs
type ContainerIndexer struct {
metaGen kubernetes.MetaGenerator
}
// NewContainerIndexer initializes and returns a ContainerIndexer
func NewContainerIndexer(_ common.Config, metaGen kubernetes.MetaGenerator) (Indexer, error) {
return &ContainerIndexer{metaGen: metaGen}, nil
}
// GetMetadata returns the composed metadata list from all registered indexers
func (c *ContainerIndexer) GetMetadata(pod *kubernetes.Pod) []MetadataIndex {
var metadata []MetadataIndex
for _, status := range append(pod.Status.ContainerStatuses, pod.Status.InitContainerStatuses...) {
cID := status.GetContainerID()
if cID == "" {
continue
}
metadata = append(metadata, MetadataIndex{
Index: cID,
Data: c.metaGen.ContainerMetadata(pod, status.Name),
})
}
return metadata
}
// GetIndexes returns the indexes for the given Pod
func (c *ContainerIndexer) GetIndexes(pod *kubernetes.Pod) []string {
var containers []string
for _, status := range append(pod.Status.ContainerStatuses, pod.Status.InitContainerStatuses...) {
cID := status.GetContainerID()
if cID == "" {
continue
}
containers = append(containers, cID)
}
return containers
}
// IPPortIndexer indexes pods based on all their host:port combinations
type IPPortIndexer struct {
metaGen kubernetes.MetaGenerator
}
// NewIPPortIndexer creates and returns a new indexer for pod IP & ports
func NewIPPortIndexer(_ common.Config, metaGen kubernetes.MetaGenerator) (Indexer, error) {
return &IPPortIndexer{metaGen: metaGen}, nil
}
// GetMetadata returns metadata for the given pod, if it matches the index
func (h *IPPortIndexer) GetMetadata(pod *kubernetes.Pod) []MetadataIndex {
var metadata []MetadataIndex
if pod.Status.PodIP == "" {
return metadata
}
// Add pod IP
metadata = append(metadata, MetadataIndex{
Index: pod.Status.PodIP,
Data: h.metaGen.PodMetadata(pod),
})
for _, container := range pod.Spec.Containers {
for _, port := range container.Ports {
if port.ContainerPort != int64(0) {
metadata = append(metadata, MetadataIndex{
Index: fmt.Sprintf("%s:%d", pod.Status.PodIP, port.ContainerPort),
Data: h.metaGen.ContainerMetadata(pod, container.Name),
})
}
}
}
return metadata
}
// GetIndexes returns the indexes for the given Pod
func (h *IPPortIndexer) GetIndexes(pod *kubernetes.Pod) []string {
var hostPorts []string
if pod.Status.PodIP == "" {
return hostPorts
}
// Add pod IP
hostPorts = append(hostPorts, pod.Status.PodIP)
for _, container := range pod.Spec.Containers {
ports := container.Ports
for _, port := range ports {
if port.ContainerPort != int64(0) {
hostPorts = append(hostPorts, fmt.Sprintf("%s:%d", pod.Status.PodIP, port.ContainerPort))
}
}
}
return hostPorts
}