Support for Prometheus Monitoring via Aiven exporter plugin (#475)

opensearch-project · Apr 14, 2023 · 8f1945a · 8f1945a
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diff --git a/charts/opensearch-operator/templates/opensearch-operator-leader-election-role-role.yaml b/charts/opensearch-operator/templates/opensearch-operator-leader-election-role-role.yaml
@@ -34,3 +34,15 @@ rules:
   verbs:
   - create
   - patch
+- apiGroups:
+  - monitoring.coreos.com
+  resources:
+  - servicemonitors
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
diff --git a/charts/opensearch-operator/templates/opensearch-operator-manager-role-cr.yaml b/charts/opensearch-operator/templates/opensearch-operator-manager-role-cr.yaml
@@ -231,3 +231,15 @@ rules:
   - patch
   - update
   - watch
+- apiGroups:
+  - monitoring.coreos.com
+  resources:
+  - servicemonitors
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
diff --git a/docs/designs/crd.md b/docs/designs/crd.md
@@ -96,6 +96,11 @@ ClusterSpec defines the desired state of OpensearchCluster
         <td>[]object</td>
         <td>List of objects that define the different nodePools in an OpensearchCluster. Each nodePool represents a group of nodes with the same opensearch roles and resources. Each nodePool is deployed as a Kubernetes StatefulSet. Together they form the opensearch cluster.</td>
         <td>true</td>
+      </tr><tr>
+        <td><b>monitoring</b></td>
+        <td>object</td>
+        <td>monitoring configuration in an OpensearchCluster</td>
+        <td>false</td>
       </tr><tr>
         <td><b>initHelper</b></td>
         <td>object</td>
@@ -566,10 +571,10 @@ InitHelperConfig defines global Opensearch InitHelper image configuration
 </table>
 
 <h3 id="GeneralConfig">
-  Keystore
+  Monitoring
 </h3>
 
-Every Keystore Value defines a secret to pull secrets from. 
+Monitoring defines Opensearch monitoring configuration
 
 <table>
     <thead>
@@ -581,6 +586,41 @@ Every Keystore Value defines a secret to pull secrets from.
             <th>default</th>
         </tr>
     </thead>
+    <tbody><tr>
+        <td><b>enable</b></td>
+        <td>bool</td>
+        <td>Define if to enable monitoring for that cluster</td>
+        <td>true</td>
+        <td>-</td>
+      </tr><tr>
+        <td><b>monitoringUserSecret</b></td>
+        <td>[]string</td>
+        <td>Define from which user the monitor will run (Getting Secret name, the secret should contain 'username':'password' fileds).</td>
+        <td>false</td>
+        <td>admin</td>
+      </tr><tr>
+        <td><b>ScrapeInterval</b></td>
+        <td>string</td>
+        <td>Define interval for scraping</td>
+        <td>false</td>
+        <td>30s</td>
+      </tr><tr>
+      </tr><tr>
+        <td><b>PluginURL</b></td>
+        <td>string</td>
+        <td>Define offline link to Aiven Plugin</td>
+        <td>false</td>
+        <td>https://github.com/aiven/prometheus-exporter-plugin-for-opensearch/releases/download/<YOUR_CLUSTER_VERSION>/prometheus-exporter-<YOUR_CLUSTER_VERSION>.zip/</td>
+      </tr><tr>
+</table>
+
+
+<h3 id="GeneralConfig">
+  Keystore
+</h3>
+
+Every Keystore Value defines a secret to pull secrets from. 
+<table>
     <tbody>
       <tr>
         <td><b>secret</b></td>
@@ -596,4 +636,5 @@ Every Keystore Value defines a secret to pull secrets from.
         <td>false</td>
         <td>-</td>
       </tr>
+    </tbody>
 </table>
diff --git a/docs/designs/monitoring.md b/docs/designs/monitoring.md
@@ -154,3 +154,16 @@ The [opensearch-prometheus-exporter](https://github.com/aparo/opensearch-prometh
 - [ ] Prometheus-operator integration
 - [ ] Grafana dashboards development
 - [ ] Grafana permissions testing
+
+
+## Progress 
+
+I choose to integrate with Aiven prometheus-exporter-plugin-for-opensearch (https://github.com/aiven/prometheus-exporter-plugin-for-opensearch). 
+
+For working with that Operator monitoring feature the client must have Prometheus cluster already installed .
+
+I added new boolean filed in general section that called "monitoring", if that filed is set to true the Aiven exporter will be added to PluginList and will be installed on the cluster.
+Besides, a new ServiceMonitor will appear in the OS cluster namespace, that ServiceMonitor is configured to fetch metrics from the OS cluster by his selectors, by port 9200 from "/_prometheus/metrics" path. 
+Aivan also added the option to configure that plugin inside "config/opensearch.yml" file, an option to add those configurations with the operator will be added soon.
+
+* Please let me  know if you familiar with any OpenSearch Grafana dashboard, Aiven suppose to release a Grafana Dashboard in the future (https://github.com/aiven/prometheus-exporter-plugin-for-opensearch/issues/12).
diff --git a/docs/userguide/main.md b/docs/userguide/main.md
@@ -1022,3 +1022,26 @@ spec:
     opensearchCredentialsSecret:
       name: dashboards-credentials  # This is the name of your secret that contains the credentials for Dashboards to use
 ```
+
+## Adding Opensearch Monitoring to your cluster
+
+The operator allows you to install and enable the Aiven monitoring plugin for OpenSearch on your cluster as a built-in feature (https://github.com/aiven/prometheus-exporter-plugin-for-opensearch)
+That feature needs internet connectivity to download the plugin. if you are working in a restricted environment, please download the plugin zip for your cluster version (example for 2.3.0: https://github.com/aiven/prometheus-exporter-plugin-for-opensearch/releases/download/2.3.0.0/prometheus-exporter-2.3.0.0.zip) and provide it at a location the operator can reach. Configure that URL as `pluginURL` in the monitoring config.
+By default the Opensearch admin user will be used to access the monitoring API. If you want to use a separate user with limited permissions you need to create that user using either of the following options:
+1) Create new applicative User using OpenSearch API/UI, create new secret with 'username':'password' keys and provide that secret name under monitoringUserSecret.
+2) Use Our OpenSearchUser CRD and provide the secret under monitoringUserSecret.
+```yaml
+apiVersion: opensearch.opster.io/v1
+kind: OpenSearchCluster
+metadata:
+  name: my-first-cluster
+  namespace: default
+spec:
+  general:
+    version: <YOUR_CLUSTER_VERSION>
+    monitoring:
+      enable: true
+      interval: 30s
+      monitoringUserSecret: appUserSecret
+      pluginUrl: https://github.com/aiven/prometheus-exporter-plugin-for-opensearch/releases/download/<YOUR_CLUSTER_VERSION>/prometheus-exporter-<YOUR_CLUSTER_VERSION>.zip
+```
diff --git a/go.work.sum b/go.work.sum
@@ -1,48 +1,115 @@
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diff --git a/opensearch-operator/api/v1/opensearch_types.go b/opensearch-operator/api/v1/opensearch_types.go
@@ -48,6 +48,7 @@ type GeneralConfig struct {
 	Command        string   `json:"command,omitempty"`
 	// Additional volumes to mount to all pods in the cluster
 	AdditionalVolumes []AdditionalVolume `json:"additionalVolumes,omitempty"`
+	Monitoring        MonitoringConfig   `json:"monitoring,omitempty"`
 	// Populate opensearch keystore before startup
 	Keystore             []KeystoreValue      `json:"keystore,omitempty"`
 	SnapshotRepositories []SnapshotRepoConfig `json:"snapshotRepositories,omitempty"`
@@ -101,11 +102,17 @@ type PVCSource struct {
 // ConfMgmt defines which additional services will be deployed
 type ConfMgmt struct {
 	AutoScaler  bool `json:"autoScaler,omitempty"`
-	Monitoring  bool `json:"monitoring,omitempty"`
 	VerUpdate   bool `json:"VerUpdate,omitempty"`
 	SmartScaler bool `json:"smartScaler,omitempty"`
 }
 
+type MonitoringConfig struct {
+	Enable               bool   `json:"enable,omitempty"`
+	MonitoringUserSecret string `json:"monitoringUserSecret,omitempty"`
+	ScrapeInterval       string `json:"scrapeInterval,omitempty"`
+	PluginURL            string `json:"pluginUrl,omitempty"`
+}
+
 type BootstrapConfig struct {
 	Resources    corev1.ResourceRequirements `json:"resources,omitempty"`
 	Tolerations  []corev1.Toleration         `json:"tolerations,omitempty"`