Abstracting pod interface in kubernetes plugin to enable easier vendoring

CHANGELOG.asciidoc

@@ -113,6 +113,7 @@ https://github.com/elastic/beats/compare/v5.1.1...master[Check the HEAD diff]
 - Support new `index_patterns` field when loading templates for Elasticsearch >= 6.0 {pull}4056[4056]
 - Adding goimports support to make check and fmt {pull}4114[4114]
 - Make kubernetes indexers/matchers pluggable {pull}4151[4151]
+- Abstracting pod interface in kubernetes plugin to enable easier vendoring {pull}4152[4152]
 
 *Filebeat*
 

NOTICE

@@ -246,12 +246,6 @@ Copyright 2014-2015 The Prometheus Authors
 This product includes software developed at
 SoundCloud Ltd. (http://soundcloud.com/).
 
---------------------------------------------------------------------
-github.com/ericchiang/k8s
---------------------------------------------------------------------
-Apache License
-
-
 --------------------------------------------------------------------
 github.com/garyburd/redigo
 --------------------------------------------------------------------
@@ -1175,6 +1169,12 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+--------------------------------------------------------------------
+github.com/ericchiang/k8s
+--------------------------------------------------------------------
+Apache License
+
+
 --------------------------------------------------------------------
 github.com/Azure/go-ansiterm
 --------------------------------------------------------------------

filebeat/beater/filebeat.go

@@ -20,7 +20,7 @@ import (
 	"github.com/elastic/beats/filebeat/spooler"
 
 	// Add filebeat level processors
-	_ "github.com/elastic/beats/filebeat/processors/kubernetes"
+	_ "github.com/elastic/beats/filebeat/processor/kubernetes"
 )
 
 var (

libbeat/processors/kubernetes/indexing.go

@@ -6,8 +6,6 @@ import (
 	"sync"
 
 	"github.com/elastic/beats/libbeat/common"
-
-	corev1 "github.com/ericchiang/k8s/api/v1"
 )
 
 //Names of indexers and matchers that have been defined.
@@ -27,11 +25,11 @@ var Indexing = NewRegister()
 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 *corev1.Pod) []MetadataIndex
+	GetMetadata(pod *Pod) []MetadataIndex
 
 	// GetIndexes return the list of indexes the given pod belongs to. This function
 	// must return the same indexes than GetMetadata
-	GetIndexes(pod *corev1.Pod) []string
+	GetIndexes(pod *Pod) []string
 }
 
 // MetadataIndex holds a pair of index -> metadata info
@@ -51,7 +49,7 @@ type Matcher interface {
 //GenMeta takes in pods to generate metadata for them
 type GenMeta interface {
 	//GenerateMetaData generates metadata by taking in a pod as an input
-	GenerateMetaData(pod *corev1.Pod) common.MapStr
+	GenerateMetaData(pod *Pod) common.MapStr
 }
 
 type Indexers struct {
@@ -133,7 +131,7 @@ func (r *Register) GetMatcher(name string) MatcherConstructor {
 }
 
 // GetMetadata returns the composed metadata list from all registered indexers
-func (i *Indexers) GetMetadata(pod *corev1.Pod) []MetadataIndex {
+func (i *Indexers) GetMetadata(pod *Pod) []MetadataIndex {
 	var metadata []MetadataIndex
 	i.RLock()
 	defer i.RUnlock()
@@ -146,7 +144,7 @@ func (i *Indexers) GetMetadata(pod *corev1.Pod) []MetadataIndex {
 }
 
 // GetIndexes returns the composed index list from all registered indexers
-func (i *Indexers) GetIndexes(pod *corev1.Pod) []string {
+func (i *Indexers) GetIndexes(pod *Pod) []string {
 	var indexes []string
 	i.RLock()
 	defer i.RUnlock()
@@ -179,7 +177,7 @@ type GenDefaultMeta struct {
 }
 
 // GenerateMetaData generates default metadata for the given pod taking to account certain filters
-func (g *GenDefaultMeta) GenerateMetaData(pod *corev1.Pod) common.MapStr {
+func (g *GenDefaultMeta) GenerateMetaData(pod *Pod) common.MapStr {
 	labelMap := common.MapStr{}
 	annotationsMap := common.MapStr{}
 
@@ -195,9 +193,9 @@ func (g *GenDefaultMeta) GenerateMetaData(pod *corev1.Pod) common.MapStr {
 
 	meta := common.MapStr{
 		"pod": common.MapStr{
-			"name": pod.Metadata.GetName(),
+			"name": pod.Metadata.Name,
 		},
-		"namespace": pod.Metadata.GetNamespace(),
+		"namespace": pod.Metadata.Namespace,
 	}
 
 	if len(labelMap) != 0 {
@@ -236,18 +234,18 @@ func NewPodNameIndexer(_ common.Config, genMeta GenMeta) (Indexer, error) {
 	return &PodNameIndexer{genMeta: genMeta}, nil
 }
 
-func (p *PodNameIndexer) GetMetadata(pod *corev1.Pod) []MetadataIndex {
+func (p *PodNameIndexer) GetMetadata(pod *Pod) []MetadataIndex {
 	data := p.genMeta.GenerateMetaData(pod)
 	return []MetadataIndex{
 		{
-			Index: pod.Metadata.GetName(),
+			Index: pod.Metadata.Name,
 			Data:  data,
 		},
 	}
 }
 
-func (p *PodNameIndexer) GetIndexes(pod *corev1.Pod) []string {
-	return []string{pod.Metadata.GetName()}
+func (p *PodNameIndexer) GetIndexes(pod *Pod) []string {
+	return []string{pod.Metadata.Name}
 }
 
 // ContainerIndexer indexes pods based on all their containers IDs
@@ -259,7 +257,7 @@ func NewContainerIndexer(_ common.Config, genMeta GenMeta) (Indexer, error) {
 	return &ContainerIndexer{genMeta: genMeta}, nil
 }
 
-func (c *ContainerIndexer) GetMetadata(pod *corev1.Pod) []MetadataIndex {
+func (c *ContainerIndexer) GetMetadata(pod *Pod) []MetadataIndex {
 	commonMeta := c.genMeta.GenerateMetaData(pod)
 	containers := c.GetIndexes(pod)
 	var metadata []MetadataIndex
@@ -277,10 +275,10 @@ func (c *ContainerIndexer) GetMetadata(pod *corev1.Pod) []MetadataIndex {
 	return metadata
 }
 
-func (c *ContainerIndexer) GetIndexes(pod *corev1.Pod) []string {
+func (c *ContainerIndexer) GetIndexes(pod *Pod) []string {
 	var containers []string
 	for _, status := range pod.Status.ContainerStatuses {
-		cID := status.GetContainerID()
+		cID := status.ContainerID
 		if cID != "" {
 			parts := strings.Split(cID, "//")
 			if len(parts) == 2 {

libbeat/processors/kubernetes/indexing_test.go

@@ -4,8 +4,6 @@ import (
 	"testing"
 
 	"github.com/elastic/beats/libbeat/common"
-	corev1 "github.com/ericchiang/k8s/api/v1"
-	metav1 "github.com/ericchiang/k8s/apis/meta/v1"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -19,15 +17,15 @@ func TestPodIndexer(t *testing.T) {
 
 	podName := "testpod"
 	ns := "testns"
-	pod := corev1.Pod{
-		Metadata: &metav1.ObjectMeta{
-			Name:      &podName,
-			Namespace: &ns,
+	pod := Pod{
+		Metadata: ObjectMeta{
+			Name:      podName,
+			Namespace: ns,
 			Labels: map[string]string{
 				"labelkey": "labelvalue",
 			},
 		},
-		Spec: &corev1.PodSpec{},
+		Spec: PodSpec{},
 	}
 
 	indexers := podIndexer.GetMetadata(&pod)
@@ -61,16 +59,16 @@ func TestContainerIndexer(t *testing.T) {
 	ns := "testns"
 	container := "container"
 
-	pod := corev1.Pod{
-		Metadata: &metav1.ObjectMeta{
-			Name:      &podName,
-			Namespace: &ns,
+	pod := Pod{
+		Metadata: ObjectMeta{
+			Name:      podName,
+			Namespace: ns,
 			Labels: map[string]string{
 				"labelkey": "labelvalue",
 			},
 		},
-		Status: &corev1.PodStatus{
-			ContainerStatuses: make([]*corev1.ContainerStatus, 0),
+		Status: PodStatus{
+			ContainerStatuses: make([]PodContainerStatus, 0),
 		},
 	}
 
@@ -90,10 +88,10 @@ func TestContainerIndexer(t *testing.T) {
 
 	cid := "docker://abcde"
 
-	pod.Status.ContainerStatuses = []*corev1.ContainerStatus{
+	pod.Status.ContainerStatuses = []PodContainerStatus{
 		{
-			Name:        &container,
-			ContainerID: &cid,
+			Name:        container,
+			ContainerID: cid,
 		},
 	}
 	expected["container"] = common.MapStr{
@@ -152,10 +150,10 @@ func TestFilteredGenMeta(t *testing.T) {
 
 	podName := "testpod"
 	ns := "testns"
-	pod := corev1.Pod{
-		Metadata: &metav1.ObjectMeta{
-			Name:      &podName,
-			Namespace: &ns,
+	pod := Pod{
+		Metadata: ObjectMeta{
+			Name:      podName,
+			Namespace: ns,
 			Labels: map[string]string{
 				"foo": "bar",
 				"x":   "y",
@@ -165,7 +163,7 @@ func TestFilteredGenMeta(t *testing.T) {
 				"c": "d",
 			},
 		},
-		Spec: &corev1.PodSpec{},
+		Spec: PodSpec{},
 	}
 
 	indexers := podIndexer.GetMetadata(&pod)

libbeat/processors/kubernetes/podwatcher.go

@@ -2,6 +2,7 @@ package kubernetes
 
 import (
 	"context"
+	"encoding/json"
 	"sync"
 	"time"
 
@@ -28,7 +29,7 @@ type PodWatcher struct {
 type annotationCache struct {
 	sync.Mutex
 	annotations map[string]common.MapStr
-	pods        map[string]*corev1.Pod // pod uid -> Pod
+	pods        map[string]*Pod // pod uid -> Pod
 }
 
 type NodeOption struct{}
@@ -48,7 +49,7 @@ func NewPodWatcher(kubeClient *k8s.Client, indexers *Indexers, syncPeriod time.D
 		stop:                cancel,
 		annotationCache: annotationCache{
 			annotations: make(map[string]common.MapStr),
-			pods:        make(map[string]*corev1.Pod),
+			pods:        make(map[string]*Pod),
 		},
 	}
 }
@@ -124,44 +125,63 @@ func (p *PodWatcher) Run() bool {
 	}
 }
 
-func (p *PodWatcher) onPodAdd(pod *corev1.Pod) {
+func (p *PodWatcher) onPodAdd(pod *Pod) {
 	metadata := p.indexers.GetMetadata(pod)
 	p.annotationCache.Lock()
 	defer p.annotationCache.Unlock()
 
-	p.annotationCache.pods[pod.Metadata.GetUid()] = pod
+	p.annotationCache.pods[pod.Metadata.UID] = pod
 
 	for _, m := range metadata {
 		p.annotationCache.annotations[m.Index] = m.Data
 	}
 }
 
-func (p *PodWatcher) onPodUpdate(pod *corev1.Pod) {
-	oldPod := p.GetPod(pod.Metadata.GetUid())
-	if oldPod.Metadata.GetResourceVersion() != pod.Metadata.GetResourceVersion() {
+func (p *PodWatcher) onPodUpdate(pod *Pod) {
+	oldPod := p.GetPod(pod.Metadata.UID)
+	if oldPod.Metadata.ResourceVersion != pod.Metadata.ResourceVersion {
 		//Process the new pod changes
 		p.onPodDelete(oldPod)
 		p.onPodAdd(pod)
 	}
 }
 
-func (p *PodWatcher) onPodDelete(pod *corev1.Pod) {
+func (p *PodWatcher) onPodDelete(pod *Pod) {
 	p.annotationCache.Lock()
 	defer p.annotationCache.Unlock()
 
-	delete(p.annotationCache.pods, pod.Metadata.GetUid())
+	delete(p.annotationCache.pods, pod.Metadata.UID)
 
 	for _, index := range p.indexers.GetIndexes(pod) {
 		delete(p.annotationCache.annotations, index)
 	}
 }
 
+func (p *PodWatcher) getPodMeta(pod *corev1.Pod) *Pod {
+	bytes, err := json.Marshal(pod)
+	if err != nil {
+		logp.Warn("Unable to marshal %v", pod.String())
+		return nil
+	}
+
+	po := &Pod{}
+	err = json.Unmarshal(bytes, po)
+	if err != nil {
+		logp.Warn("Unable to marshal %v", pod.String())
+		return nil
+	}
+
+	return po
+
+}
+
 func (p *PodWatcher) worker() {
-	for pod := range p.podQueue {
-		if pod.Metadata.GetDeletionTimestamp() != nil {
+	for po := range p.podQueue {
+		pod := p.getPodMeta(po)
+		if pod.Metadata.DeletionTimestamp != "" {
 			p.onPodDelete(pod)
 		} else {
-			existing := p.GetPod(pod.Metadata.GetUid())
+			existing := p.GetPod(pod.Metadata.UID)
 			if existing != nil {
 				p.onPodUpdate(pod)
 			} else {
@@ -181,7 +201,7 @@ func (p *PodWatcher) GetMetaData(arg string) common.MapStr {
 	return nil
 }
 
-func (p *PodWatcher) GetPod(uid string) *corev1.Pod {
+func (p *PodWatcher) GetPod(uid string) *Pod {
 	p.annotationCache.Lock()
 	defer p.annotationCache.Unlock()
 	return p.annotationCache.pods[uid]