[Chore] Add e2e test to check Tempo Operator monitoring

tests/Dockerfile

@@ -7,6 +7,9 @@ COPY . /tmp/tempo-operator
 
 WORKDIR /tmp
 
+# Install dependencies required by test cases and debugging
+RUN apt-get update && apt-get install -y jq vim libreadline-dev
+
 # Install kuttl
 RUN curl -L -o kuttl https://github.com/kudobuilder/kuttl/releases/download/v0.15.0/kubectl-kuttl_0.15.0_linux_x86_64 \
     && chmod +x kuttl \

tests/e2e-openshift/monitoring/00-assert.yaml

@@ -0,0 +1,32 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: minio
+  namespace: kuttl-monitoring
+status:
+  availableReplicas: 1
+  readyReplicas: 1
+  replicas: 1
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: minio
+  namespace: kuttl-monitoring
+spec:
+  ports:
+  - port: 9000
+    protocol: TCP
+    targetPort: 9000
+  selector:
+    app.kubernetes.io/name: minio
+  type: ClusterIP
+
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: minio-secret
+  namespace: kuttl-monitoring
+type: Opaque

tests/e2e-openshift/monitoring/00-install-storage.yaml

@@ -0,0 +1,89 @@
+# The namespace is auto-deleted by kuttl after the test run.
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: kuttl-monitoring
+
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  labels:
+    app.kubernetes.io/name: minio
+  name: minio
+  namespace: kuttl-monitoring
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 10Gi
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: minio
+  namespace: kuttl-monitoring
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: minio
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: minio
+    spec:
+      containers:
+        - command:
+            - /bin/sh
+            - -c
+            - |
+              mkdir -p /storage/tempo && \
+              minio server /storage
+          env:
+            - name: MINIO_ACCESS_KEY
+              value: tempo
+            - name: MINIO_SECRET_KEY
+              value: supersecret
+          image: minio/minio
+          name: minio
+          ports:
+            - containerPort: 9000
+          volumeMounts:
+            - mountPath: /storage
+              name: storage
+      volumes:
+        - name: storage
+          persistentVolumeClaim:
+            claimName: minio
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: minio
+  namespace: kuttl-monitoring
+spec:
+  ports:
+    - port: 9000
+      protocol: TCP
+      targetPort: 9000
+  selector:
+    app.kubernetes.io/name: minio
+  type: ClusterIP
+
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: minio-secret
+  namespace: kuttl-monitoring
+stringData:
+  endpoint: http://minio.kuttl-monitoring.svc:9000
+  bucket: tempo
+  access_key_id: tempo
+  access_key_secret: supersecret
+type: Opaque

tests/e2e-openshift/monitoring/01-assert.yaml

@@ -0,0 +1,4 @@
+apiVersion: kuttl.dev/v1beta1
+kind: TestAssert
+commands:
+- script: ./tests/e2e-openshift/monitoring/check_user_workload_monitoring.sh

tests/e2e-openshift/monitoring/01-workload-monitoring.yaml

@@ -0,0 +1,13 @@
+# oc -n openshift-user-workload-monitoring get pod
+# https://docs.openshift.com/container-platform/4.13/monitoring/enabling-monitoring-for-user-defined-projects.html#accessing-metrics-from-outside-cluster_enabling-monitoring-for-user-defined-projects
+
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: cluster-monitoring-config
+  namespace: openshift-monitoring
+data:
+  config.yaml: |
+    enableUserWorkload: true 
+    alertmanagerMain:
+      enableUserAlertmanagerConfig: true