From a759b9cb50c2a8593a70d9ec527c224b0f11a2ba Mon Sep 17 00:00:00 2001
From: Ewout Prangsma <ewout@prangsma.net>
Date: Thu, 5 Apr 2018 14:54:55 +0200
Subject: [PATCH] Added examples for exposing metrics to Prometheus

---
 docs/Manual/Deployment/Kubernetes/Metrics.md  |  9 ++++-
 .../deployment-operator-servicemonitor.yaml   | 34 +++++++++++++++++++
 .../templates/deployment/deployment.yaml      |  1 +
 manifests/templates/storage/deployment.yaml   |  1 +
 4 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 examples/metrics/deployment-operator-servicemonitor.yaml

diff --git a/docs/Manual/Deployment/Kubernetes/Metrics.md b/docs/Manual/Deployment/Kubernetes/Metrics.md
index bab3d3ec5..aad3b5400 100644
--- a/docs/Manual/Deployment/Kubernetes/Metrics.md
+++ b/docs/Manual/Deployment/Kubernetes/Metrics.md
@@ -1,3 +1,10 @@
 # Metrics
 
-TBD
+The ArangoDB Kubernetes Operator (`kube-arangodb`) exposes metrics of
+its operations in a format that is compatible with [Prometheus](https://prometheus.io).
+
+The metrics are exposed through HTTPS on port `8528` under path `/metrics`.
+
+Look at [examples/metrics](https://github.com/arangodb/kube-arangodb/tree/master/examples/metrics)
+for examples of `Services` and `ServiceMonitors` you can use to integrate
+with Prometheus through the [Prometheus-Operator by CoreOS](https://github.com/coreos/prometheus-operator).
diff --git a/examples/metrics/deployment-operator-servicemonitor.yaml b/examples/metrics/deployment-operator-servicemonitor.yaml
new file mode 100644
index 000000000..128bc3f35
--- /dev/null
+++ b/examples/metrics/deployment-operator-servicemonitor.yaml
@@ -0,0 +1,34 @@
+# This example shows how to integrate with the Prometheus Operator
+# to bring metrics from kube-arangodb to Prometheus.
+
+apiVersion: v1
+kind: Service
+metadata:
+  name: arango-deployment-operator
+  labels:
+    app: arango-deployment-operator
+spec:
+  selector:
+    app: arango-deployment-operator
+  ports:
+  - name: metrics
+    port: 8528
+
+---
+
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: arango-deployment-operator
+  labels:
+    team: frontend
+spec:
+  selector:
+    matchLabels:
+      app: arango-deployment-operator
+  endpoints:
+  - port: metrics
+    scheme: https
+    tlsConfig:
+      insecureSkipVerify: true
+
diff --git a/manifests/templates/deployment/deployment.yaml b/manifests/templates/deployment/deployment.yaml
index 08391f888..c74fb69d0 100644
--- a/manifests/templates/deployment/deployment.yaml
+++ b/manifests/templates/deployment/deployment.yaml
@@ -12,6 +12,7 @@ spec:
     metadata:
       labels:
         name: {{ .Deployment.OperatorDeploymentName }}
+        app: arango-deployment-operator
     spec:
       containers:
       - name: operator
diff --git a/manifests/templates/storage/deployment.yaml b/manifests/templates/storage/deployment.yaml
index a41083eaa..1a1e16715 100644
--- a/manifests/templates/storage/deployment.yaml
+++ b/manifests/templates/storage/deployment.yaml
@@ -20,6 +20,7 @@ spec:
     metadata:
       labels:
         name: {{ .Storage.OperatorDeploymentName }}
+        app: arango-storage-operator
     spec:
       serviceAccountName: {{ .Storage.Operator.ServiceAccountName }}
       containers: