[processor/k8sattribute] support attribute k8s.deployment.uid

Signed-off-by: Ziqi Zhao <[email protected]>

.chloggen/k8sattributeprocessor-support-deployment-uid.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: k8sattributesprocessor
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Support adding attribute `k8s.deployment.uid`."
+
+# One or more tracking issues related to the change
+issues: [14003]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:

processor/k8sattributesprocessor/client_test.go

@@ -27,14 +27,15 @@ import (
 
 // fakeClient is used as a replacement for WatchClient in test cases.
 type fakeClient struct {
-	Pods              map[kube.PodIdentifier]*kube.Pod
-	Rules             kube.ExtractionRules
-	Filters           kube.Filters
-	Associations      []kube.Association
-	Informer          cache.SharedInformer
-	NamespaceInformer cache.SharedInformer
-	Namespaces        map[string]*kube.Namespace
-	StopCh            chan struct{}
+	Pods               map[kube.PodIdentifier]*kube.Pod
+	Rules              kube.ExtractionRules
+	Filters            kube.Filters
+	Associations       []kube.Association
+	Informer           cache.SharedInformer
+	NamespaceInformer  cache.SharedInformer
+	ReplicaSetInformer cache.SharedInformer
+	Namespaces         map[string]*kube.Namespace
+	StopCh             chan struct{}
 }
 
 func selectors() (labels.Selector, fields.Selector) {
@@ -43,18 +44,19 @@ func selectors() (labels.Selector, fields.Selector) {
 }
 
 // newFakeClient instantiates a new FakeClient object and satisfies the ClientProvider type
-func newFakeClient(_ *zap.Logger, apiCfg k8sconfig.APIConfig, rules kube.ExtractionRules, filters kube.Filters, associations []kube.Association, exclude kube.Excludes, _ kube.APIClientsetProvider, _ kube.InformerProvider, _ kube.InformerProviderNamespace) (kube.Client, error) {
+func newFakeClient(_ *zap.Logger, apiCfg k8sconfig.APIConfig, rules kube.ExtractionRules, filters kube.Filters, associations []kube.Association, exclude kube.Excludes, _ kube.APIClientsetProvider, _ kube.InformerProvider, _ kube.InformerProviderNamespace, _ kube.InformerProviderReplicaSet) (kube.Client, error) {
 	cs := fake.NewSimpleClientset()
 
 	ls, fs := selectors()
 	return &fakeClient{
-		Pods:              map[kube.PodIdentifier]*kube.Pod{},
-		Rules:             rules,
-		Filters:           filters,
-		Associations:      associations,
-		Informer:          kube.NewFakeInformer(cs, "", ls, fs),
-		NamespaceInformer: kube.NewFakeInformer(cs, "", ls, fs),
-		StopCh:            make(chan struct{}),
+		Pods:               map[kube.PodIdentifier]*kube.Pod{},
+		Rules:              rules,
+		Filters:            filters,
+		Associations:       associations,
+		Informer:           kube.NewFakeInformer(cs, "", ls, fs),
+		NamespaceInformer:  kube.NewFakeInformer(cs, "", ls, fs),
+		ReplicaSetInformer: kube.NewFakeInformer(cs, "", ls, fs),
+		StopCh:             make(chan struct{}),
 	}, nil
 }
 

processor/k8sattributesprocessor/e2e_test.go

@@ -159,6 +159,7 @@ func TestE2E(t *testing.T) {
 				"k8s.node.name":            newExpectedValue(exist, ""),
 				"k8s.namespace.name":       newExpectedValue(equal, "default"),
 				"k8s.deployment.name":      newExpectedValue(equal, "telemetrygen-"+testID+"-traces-deployment"),
+				"k8s.deployment.uid":       newExpectedValue(exist, ""),
 				"k8s.replicaset.name":      newExpectedValue(regex, "telemetrygen-"+testID+"-traces-deployment-[a-z0-9]*"),
 				"k8s.replicaset.uid":       newExpectedValue(exist, ""),
 				"k8s.annotations.workload": newExpectedValue(equal, "deployment"),
@@ -244,6 +245,7 @@ func TestE2E(t *testing.T) {
 				"k8s.node.name":            newExpectedValue(exist, ""),
 				"k8s.namespace.name":       newExpectedValue(equal, "default"),
 				"k8s.deployment.name":      newExpectedValue(equal, "telemetrygen-"+testID+"-metrics-deployment"),
+				"k8s.deployment.uid":       newExpectedValue(exist, ""),
 				"k8s.replicaset.name":      newExpectedValue(regex, "telemetrygen-"+testID+"-metrics-deployment-[a-z0-9]*"),
 				"k8s.replicaset.uid":       newExpectedValue(exist, ""),
 				"k8s.annotations.workload": newExpectedValue(equal, "deployment"),
@@ -329,6 +331,7 @@ func TestE2E(t *testing.T) {
 				"k8s.node.name":            newExpectedValue(exist, ""),
 				"k8s.namespace.name":       newExpectedValue(equal, "default"),
 				"k8s.deployment.name":      newExpectedValue(equal, "telemetrygen-"+testID+"-logs-deployment"),
+				"k8s.deployment.uid":       newExpectedValue(exist, ""),
 				"k8s.replicaset.name":      newExpectedValue(regex, "telemetrygen-"+testID+"-logs-deployment-[a-z0-9]*"),
 				"k8s.replicaset.uid":       newExpectedValue(exist, ""),
 				"k8s.annotations.workload": newExpectedValue(equal, "deployment"),

processor/k8sattributesprocessor/internal/kube/client.go

@@ -23,6 +23,7 @@ import (
 
 	conventions "go.opentelemetry.io/collector/semconv/v1.6.1"
 	"go.uber.org/zap"
+	apps_v1 "k8s.io/api/apps/v1"
 	api_v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/fields"
 	"k8s.io/apimachinery/pkg/labels"
@@ -36,16 +37,17 @@ import (
 
 // WatchClient is the main interface provided by this package to a kubernetes cluster.
 type WatchClient struct {
-	m                 sync.RWMutex
-	deleteMut         sync.Mutex
-	logger            *zap.Logger
-	kc                kubernetes.Interface
-	informer          cache.SharedInformer
-	namespaceInformer cache.SharedInformer
-	replicasetRegex   *regexp.Regexp
-	cronJobRegex      *regexp.Regexp
-	deleteQueue       []deleteRequest
-	stopCh            chan struct{}
+	m                  sync.RWMutex
+	deleteMut          sync.Mutex
+	logger             *zap.Logger
+	kc                 kubernetes.Interface
+	informer           cache.SharedInformer
+	namespaceInformer  cache.SharedInformer
+	replicasetInformer cache.SharedInformer
+	replicasetRegex    *regexp.Regexp
+	cronJobRegex       *regexp.Regexp
+	deleteQueue        []deleteRequest
+	stopCh             chan struct{}
 
 	// A map containing Pod related data, used to associate them with resources.
 	// Key can be either an IP address or Pod UID
@@ -58,6 +60,10 @@ type WatchClient struct {
 	// A map containing Namespace related data, used to associate them with resources.
 	// Key is namespace name
 	Namespaces map[string]*Namespace
+
+	// A map containing ReplicaSets related data, used to associate them with resources.
+	// Key is replicaset uid
+	ReplicaSets map[string]*ReplicaSet
 }
 
 // Extract replicaset name from the pod name. Pod name is created using
@@ -69,7 +75,7 @@ var rRegex = regexp.MustCompile(`^(.*)-[0-9a-zA-Z]+$`)
 var cronJobRegex = regexp.MustCompile(`^(.*)-[0-9]+$`)
 
 // New initializes a new k8s Client.
-func New(logger *zap.Logger, apiCfg k8sconfig.APIConfig, rules ExtractionRules, filters Filters, associations []Association, exclude Excludes, newClientSet APIClientsetProvider, newInformer InformerProvider, newNamespaceInformer InformerProviderNamespace) (Client, error) {
+func New(logger *zap.Logger, apiCfg k8sconfig.APIConfig, rules ExtractionRules, filters Filters, associations []Association, exclude Excludes, newClientSet APIClientsetProvider, newInformer InformerProvider, newNamespaceInformer InformerProviderNamespace, newReplicaSetInformer InformerProviderReplicaSet) (Client, error) {
 	c := &WatchClient{
 		logger:          logger,
 		Rules:           rules,
@@ -84,6 +90,7 @@ func New(logger *zap.Logger, apiCfg k8sconfig.APIConfig, rules ExtractionRules,
 
 	c.Pods = map[PodIdentifier]*Pod{}
 	c.Namespaces = map[string]*Namespace{}
+	c.ReplicaSets = map[string]*ReplicaSet{}
 	if newClientSet == nil {
 		newClientSet = k8sconfig.MakeClient
 	}
@@ -117,6 +124,14 @@ func New(logger *zap.Logger, apiCfg k8sconfig.APIConfig, rules ExtractionRules,
 	} else {
 		c.namespaceInformer = NewNoOpInformer(c.kc)
 	}
+
+	if rules.DeploymentName || rules.DeploymentUID {
+		if newReplicaSetInformer == nil {
+			newReplicaSetInformer = newReplicaSetSharedInformer
+		}
+		c.replicasetInformer = newReplicaSetInformer(c.kc, c.Filters.Namespace)
+	}
+
 	return c, err
 }
 
@@ -141,6 +156,18 @@ func (c *WatchClient) Start() {
 		c.logger.Error("error adding event handler to namespace informer", zap.Error(err))
 	}
 	go c.namespaceInformer.Run(c.stopCh)
+
+	if c.Rules.DeploymentName || c.Rules.DeploymentUID {
+		_, err = c.replicasetInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
+			AddFunc:    c.handleReplicaSetAdd,
+			UpdateFunc: c.handleReplicaSetUpdate,
+			DeleteFunc: c.handleReplicaSetDelete,
+		})
+		if err != nil {
+			c.logger.Error("error adding event handler to replicaset informer", zap.Error(err))
+		}
+		go c.replicasetInformer.Run(c.stopCh)
+	}
 }
 
 // Stop signals the the k8s watcher/informer to stop watching for new events.
@@ -312,7 +339,8 @@ func (c *WatchClient) extractPodAttributes(pod *api_v1.Pod) map[string]string {
 		c.Rules.DaemonSetUID || c.Rules.DaemonSetName ||
 		c.Rules.JobUID || c.Rules.JobName ||
 		c.Rules.StatefulSetUID || c.Rules.StatefulSetName ||
-		c.Rules.Deployment || c.Rules.CronJobName {
+		c.Rules.DeploymentName || c.Rules.DeploymentUID ||
+		c.Rules.CronJobName {
 		for _, ref := range pod.OwnerReferences {
 			switch ref.Kind {
 			case "ReplicaSet":
@@ -322,11 +350,18 @@ func (c *WatchClient) extractPodAttributes(pod *api_v1.Pod) map[string]string {
 				if c.Rules.ReplicaSetName {
 					tags[conventions.AttributeK8SReplicaSetName] = ref.Name
 				}
-				if c.Rules.Deployment {
-					// format: [deployment-name]-[Random-String-For-ReplicaSet]
-					parts := c.replicasetRegex.FindStringSubmatch(ref.Name)
-					if len(parts) == 2 {
-						tags[conventions.AttributeK8SDeploymentName] = parts[1]
+				if c.Rules.DeploymentName {
+					if replicaset, ok := c.getReplicaSet(string(ref.UID)); ok {
+						if replicaset.Deployment.Name != "" {
+							tags[conventions.AttributeK8SDeploymentName] = replicaset.Deployment.Name
+						}
+					}
+				}
+				if c.Rules.DeploymentUID {
+					if replicaset, ok := c.getReplicaSet(string(ref.UID)); ok {
+						if replicaset.Deployment.Name != "" {
+							tags[conventions.AttributeK8SDeploymentUID] = replicaset.Deployment.UID
+						}
 					}
 				}
 			case "DaemonSet":
@@ -661,3 +696,67 @@ func needContainerAttributes(rules ExtractionRules) bool {
 		rules.ContainerImageTag ||
 		rules.ContainerID
 }
+
+func (c *WatchClient) handleReplicaSetAdd(obj interface{}) {
+	observability.RecordReplicaSetAdded()
+	if replicaset, ok := obj.(*apps_v1.ReplicaSet); ok {
+		c.addOrUpdateReplicaSet(replicaset)
+	} else {
+		c.logger.Error("object received was not of type apps_v1.ReplicaSet", zap.Any("received", obj))
+	}
+}
+
+func (c *WatchClient) handleReplicaSetUpdate(old, new interface{}) {
+	observability.RecordReplicaSetUpdated()
+	if replicaset, ok := new.(*apps_v1.ReplicaSet); ok {
+		c.addOrUpdateReplicaSet(replicaset)
+	} else {
+		c.logger.Error("object received was not of type apps_v1.ReplicaSet", zap.Any("received", new))
+	}
+}
+
+func (c *WatchClient) handleReplicaSetDelete(obj interface{}) {
+	observability.RecordReplicaSetDeleted()
+	if replicaset, ok := obj.(*apps_v1.ReplicaSet); ok {
+		c.m.Lock()
+		key := string(replicaset.UID)
+		delete(c.ReplicaSets, key)
+		c.m.Unlock()
+	} else {
+		c.logger.Error("object received was not of type apps_v1.ReplicaSet", zap.Any("received", obj))
+	}
+}
+
+func (c *WatchClient) addOrUpdateReplicaSet(replicaset *apps_v1.ReplicaSet) {
+	newReplicaSet := &ReplicaSet{
+		Name:      replicaset.Name,
+		Namespace: replicaset.Namespace,
+		UID:       string(replicaset.UID),
+	}
+
+	for _, ownerReference := range replicaset.OwnerReferences {
+		if ownerReference.Kind == "Deployment" && ownerReference.Controller != nil && *ownerReference.Controller {
+			newReplicaSet.Deployment = Deployment{
+				Name: ownerReference.Name,
+				UID:  string(ownerReference.UID),
+			}
+			break
+		}
+	}
+
+	c.m.Lock()
+	if replicaset.UID != "" {
+		c.ReplicaSets[string(replicaset.UID)] = newReplicaSet
+	}
+	c.m.Unlock()
+}
+
+func (c *WatchClient) getReplicaSet(uid string) (*ReplicaSet, bool) {
+	c.m.RLock()
+	replicaset, ok := c.ReplicaSets[uid]
+	c.m.RUnlock()
+	if ok {
+		return replicaset, ok
+	}
+	return nil, false
+}