[chore] add standalone TA e2e test

.github/workflows/e2e-reusable.yaml

@@ -83,6 +83,7 @@ jobs:
         - e2e-multi-instrumentation
         - e2e-metadata-filters
         - e2e-ta-collector-mtls
+        - e2e-ta-standalone
         - e2e-crd-validations
         include:
         - group: e2e-instrumentation-default
@@ -97,6 +98,8 @@ jobs:
           setup: "add-operator-arg OPERATOR_ARG='--annotations-filter=.*filter.out --annotations-filter=config.*.gke.io.* --labels-filter=.*filter.out' prepare-e2e"
         - group: e2e-ta-collector-mtls
           setup: "add-operator-arg OPERATOR_ARG='--feature-gates=operator.targetallocator.mtls' add-certmanager-permissions prepare-e2e"
+        - group: e2e-ta-standalone
+          setup: "prepare-e2e-ta-standalone"
         - group: e2e-automatic-rbac
           setup: "add-rbac-permissions-to-operator prepare-e2e"
 

Makefile

@@ -457,6 +457,17 @@ add-certmanager-permissions:
 e2e-ta-collector-mtls: chainsaw
 	$(CHAINSAW) test --test-dir ./tests/e2e-ta-collector-mtls --report-name e2e-ta-collector-mtls
 
+# Standalone Target Allocator integration tests (no operator needed)
+.PHONY: prepare-e2e-ta-standalone
+prepare-e2e-ta-standalone: chainsaw start-kind load-image-all
+	@mkdir -p ./.testresults/e2e
+
+.PHONY: e2e-ta-standalone
+e2e-ta-standalone: chainsaw
+	TARGETALLOCATOR_IMG=$(TARGETALLOCATOR_IMG) \
+	COLLECTOR_IMG=$${COLLECTOR_IMG:-"ghcr.io/open-telemetry/opentelemetry-collector-releases/opentelemetry-collector-contrib:$$(awk -F= '/^opentelemetry-collector=/ {print $$2}' versions.txt)"} \
+	$(CHAINSAW) test --test-dir ./tests/e2e-ta-standalone --report-name e2e-ta-standalone
+
 # end-to-end-test for Annotations/Labels Filters
 .PHONY: e2e-metadata-filters
 e2e-metadata-filters: chainsaw

tests/e2e-ta-standalone/ta-standalone/00-rbac.yaml

@@ -0,0 +1,31 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: ta-standalone
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: ($clusterRoleName)
+rules:
+  - apiGroups: [""]
+    resources: [pods, nodes, namespaces, services, endpoints]
+    verbs: [get, list, watch]
+  - apiGroups: [discovery.k8s.io]
+    resources: [endpointslices]
+    verbs: [get, list, watch]
+  - nonResourceURLs: [/metrics]
+    verbs: [get]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: ($clusterRoleBindingName)
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: ($clusterRoleName)
+subjects:
+  - kind: ServiceAccount
+    name: ta-standalone
+    namespace: ($namespace)

tests/e2e-ta-standalone/ta-standalone/01-ta-config.yaml

@@ -0,0 +1,23 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: ta-config
+data:
+  targetallocator.yaml: |
+    allocation_strategy: consistent-hashing
+    filter_strategy: relabel-config
+    collector_selector:
+      matchLabels:
+        app: otel-collector
+    config:
+      scrape_configs:
+        - job_name: test-targets
+          scrape_interval: 30s
+          static_configs:
+            - targets:
+                - "target-a:8080"
+                - "target-b:8080"
+                - "target-c:8080"
+                - "target-d:8080"
+                - "target-e:8080"
+                - "target-f:8080"

tests/e2e-ta-standalone/ta-standalone/02-ta-deployment.yaml

@@ -0,0 +1,56 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ta-standalone
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: ta-standalone
+  template:
+    metadata:
+      labels:
+        app: ta-standalone
+    spec:
+      serviceAccountName: ta-standalone
+      containers:
+        - name: ta
+          image: ($TARGETALLOCATOR_IMG)
+          ports:
+            - containerPort: 8080
+              name: http
+              protocol: TCP
+          env:
+            - name: OTELCOL_NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+          volumeMounts:
+            - name: ta-config
+              mountPath: /conf
+          livenessProbe:
+            httpGet:
+              path: /livez
+              port: 8080
+            initialDelaySeconds: 5
+          readinessProbe:
+            httpGet:
+              path: /readyz
+              port: 8080
+            initialDelaySeconds: 5
+      volumes:
+        - name: ta-config
+          configMap:
+            name: ta-config
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: ta-standalone
+spec:
+  selector:
+    app: ta-standalone
+  ports:
+    - name: http
+      port: 80
+      targetPort: http

tests/e2e-ta-standalone/ta-standalone/03-assert.yaml

@@ -0,0 +1,13 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ta-standalone
+status:
+  readyReplicas: 1
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: collector
+status:
+  readyReplicas: 2

tests/e2e-ta-standalone/ta-standalone/03-collectors.yaml

@@ -0,0 +1,63 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: collector-config
+data:
+  collector.yaml: |
+    receivers:
+      prometheus:
+        config: {}
+        target_allocator:
+          collector_id: ${POD_NAME}
+          endpoint: http://ta-standalone:80
+          interval: 30s
+    exporters:
+      debug: {}
+    service:
+      pipelines:
+        metrics:
+          receivers: [prometheus]
+          exporters: [debug]
+      telemetry:
+        metrics:
+          readers:
+            - pull:
+                exporter:
+                  prometheus:
+                    host: 0.0.0.0
+                    port: 8888
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: collector
+spec:
+  replicas: 2
+  serviceName: collector
+  selector:
+    matchLabels:
+      app: otel-collector
+  template:
+    metadata:
+      labels:
+        app: otel-collector
+    spec:
+      containers:
+        - name: collector
+          image: ($COLLECTOR_IMG)
+          args: ["--config=/conf/collector.yaml"]
+          env:
+            - name: POD_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+          ports:
+            - containerPort: 8888
+              name: metrics
+          volumeMounts:
+            - name: config
+              mountPath: /conf
+      volumes:
+        - name: config
+          configMap:
+            name: collector-config