Add e2e test

tests/e2e.sh

@@ -14,6 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+set -x
 set -e
 set -o pipefail
 
@@ -102,19 +103,35 @@ function test_daemonset() {
     kubectl create -f ./examples/daemonsetsharding
     ls ./examples/daemonsetsharding
     kube_state_metrics_up
-    curl -s "http://localhost:8001/api/v1/namespaces/kube-system/services/kube-state-metrics-shard:http-metrics/proxy/metrics" >${KUBE_STATE_METRICS_LOG_DIR}/pod-metrics
-    curl -s "http://localhost:8001/api/v1/namespaces/kube-system/services/kube-state-metrics:http-metrics/proxy/metrics" >${KUBE_STATE_METRICS_LOG_DIR}/nonpod-metrics
-    m1="$(cat ${KUBE_STATE_METRICS_LOG_DIR}/pod-metrics | grep "# TYPE kube_pod_info" || true)"
-    m2="$(cat ${KUBE_STATE_METRICS_LOG_DIR}/nonpod-metrics | grep "# TYPE kube_pod_info" || true)"
-    if [[ -z "${m1}" ]]; then
-        echo "can't found metric kube_pod_info from pod metrics service"
+    kubectl apply -f ./tests/e2e/testdata/pods.yaml
+    sleep 10
+    kubectl get deployment -n default
+    curl -s "http://localhost:8001/api/v1/namespaces/kube-system/services/kube-state-metrics-shard:http-metrics/proxy/metrics" >${KUBE_STATE_METRICS_LOG_DIR}/daemonset-scraped-metrics
+    curl -s "http://localhost:8001/api/v1/namespaces/kube-system/services/kube-state-metrics:http-metrics/proxy/metrics" >${KUBE_STATE_METRICS_LOG_DIR}/deployment-scraped-metrics
+    cat ${KUBE_STATE_METRICS_LOG_DIR}/daemonset-scraped-metrics
+    cat ${KUBE_STATE_METRICS_LOG_DIR}/deployment-scraped-metrics
+    runningpod1="$(cat ${KUBE_STATE_METRICS_LOG_DIR}/daemonset-scraped-metrics | grep "kube_pod_info"  | grep "runningpod1" | wc -l)"
+    pendingpod2="$(cat ${KUBE_STATE_METRICS_LOG_DIR}/deployment-scraped-metrics | grep "kube_pod_info" | grep "pendingpod2" | wc -l)"
+    expected_num_pod=1
+    if [ "${runningpod1}" == "${expected_num_pod}" ]; then
+        echo "runningpod1 doesn't show up in kube_pod_info metric only once"
         exit 1
     fi
-    if [[ -n "${m2}" ]]; then
-        echo "shouldn't find metric kube_pod_info from non-pod metrics service"
+    if [ "${pendingpod2}" -ne "${expected_num_pod}" ]; then
+        echo "pendingpod2 doesn't show up in kube_pod_info metric only once"
         exit 1
     fi
-
+    m1="$(cat ${KUBE_STATE_METRICS_LOG_DIR}/daemonset-scraped-metrics | grep "# TYPE kube_node_info"  | wc -l)"
+    m2="$(cat ${KUBE_STATE_METRICS_LOG_DIR}/deployment-scraped-metrics | grep "# TYPE kube_node_info"  | wc -l)"
+    if [[ -z "${m2}" ]]; then
+        echo "can't found metric kube_node_info from deployment metrics service"
+        exit 1
+    fi
+    if [[ -n "${m1}" ]]; then
+        echo "shouldn't find metric kube_node_info from daemonset metrics service"
+        exit 1
+    fi
+    kubectl delete -f ./tests/e2e/testdata/pods.yaml
     kubectl delete -f ./examples/daemonsetsharding
     sleep 20
 }

tests/e2e/testdata/pods.yaml

@@ -0,0 +1,85 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: pod1
+  name: pod1
+  namespace: default
+spec:
+  progressDeadlineSeconds: 600
+  replicas: 1
+  revisionHistoryLimit: 10
+  selector:
+    matchLabels:
+      app: pod1
+  strategy:
+    rollingUpdate:
+      maxSurge: 25%
+      maxUnavailable: 25%
+    type: RollingUpdate
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        app: pod1
+    spec:
+      nodeSelector:
+        debug-node: "non"
+      containers:
+      - command:
+        - /agnhost
+        - netexec
+        - --http-port=8080
+        image: registry.k8s.io/e2e-test-images/agnhost:2.39
+        imagePullPolicy: IfNotPresent
+        name: agnhost
+        resources: {}
+        terminationMessagePath: /dev/termination-log
+        terminationMessagePolicy: File
+      dnsPolicy: ClusterFirst
+      restartPolicy: Always
+      schedulerName: default-scheduler
+      securityContext: {}
+      terminationGracePeriodSeconds: 30
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: pod2
+  name: pod2
+  namespace: default
+spec:
+  progressDeadlineSeconds: 600
+  replicas: 1
+  revisionHistoryLimit: 10
+  selector:
+    matchLabels:
+      app: pod2
+  strategy:
+    rollingUpdate:
+      maxSurge: 25%
+      maxUnavailable: 25%
+    type: RollingUpdate
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        app: pod2
+    spec:
+      containers:
+      - command:
+        - /agnhost
+        - netexec
+        - --http-port=8080
+        image: registry.k8s.io/e2e-test-images/agnhost:2.39
+        imagePullPolicy: IfNotPresent
+        name: agnhost
+        resources: {}
+        terminationMessagePath: /dev/termination-log
+        terminationMessagePolicy: File
+      dnsPolicy: ClusterFirst
+      restartPolicy: Always
+      schedulerName: default-scheduler
+      securityContext: {}
+      terminationGracePeriodSeconds: 30