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Setting up Dashboards for SI Statistics - Getting Started Guide

This section explains how WSO2 Streaming Integrator servers can be configured to publish data to Prometheus and display WSO2 Streaming Integrator (WSO2 SI) statistics in Grafana dashboards.

Before you begin:

• Download and install Prometheus. For instructions, see the Prometheus Getting Started Guide.
  
• Download Grafana from Grafana Labs.

Step 1 - Configure the Servers

Follow the instructions below to configure a Grafana dashboard:

Step 1.1 - Configure the Prometheus reporter

Configure the Prometheus reporter in the Streaming Integrator in order to enable statistics for the Prometheus reporter as follows:

1. Open the <SI_HOME>/conf/server/deployment.yaml file.

2. Set the enabled parameter in the wso2.metrics section to true, and update the other parameters in the section as shown below. You also need to add the metrics.prometheus: as shown.

   wso2.metrics:
     # Enable Metrics
     enabled: true
     reporting:
       console:
         - # The name for the Console Reporter
           name: Console
   
           # Enable Console Reporter
           enabled: false
   
           # Polling Period in seconds.
           # This is the period for polling metrics from the metric registry and printing in the console
           pollingPeriod: 2
   
   metrics.prometheus:
   reporting:
     prometheus:
       - name: prometheus
         enabled: true
         serverURL: "http://localhost:9005"

3. Enable statistics for the Prometheus reporter at the Siddhi application level.

   To enable a Siddhi application to publish its statistics to Grafana, you need to specify Prometheus as the statistics reporter via the @App:statistics annotation by setting the reporter parameter as shown in the example below.

   @App:name('TestMetrics')
   @App:statistics(reporter = 'prometheus')
   define stream TestStream (message string);

   For the dashboards to display statistics, at least one Siddhi application with the above configuration needs to be deployed in the Streaming Integrator Server.

Step 1.2 - Start the Streaming Integrator server

1. Navigate to the <SI_HOME>/bin directory.

2. Issue the appropriate command based on your operating system to start the Streaming runtime.

   • For Windows: server.bat --run
     
   • For Linux/MacOS: ./server.sh

Step 1.3 - Start the Prometheus server

1. Open the <PROMETHEUS_HOME>/prometheus.yml file and add the following configuration in the scrape_configs: section.

   scrape_configs:
     - job_name: 'prometheus'
       static_configs:
       - targets: ['localhost:9005']

2. Navigate to the directory and start the Prometheus server.

   ./prometheus

Step 1.4 - Start and configure the Grafana server

Follow the instructions below to start and configure the Grafana server:

1. Start Grafana

   Info

   The procedure to start Grafana depends on your operating system and the installation process. e.g., If your operating system is Mac OS and you have installed Grafana via Homebrew, you start Grafana by issuing the brew services start grafana command.

2. Access Grafana via http://localhost:3000/.

3. In the Data Sources section, click Add your first data source. In the Add data source page that appears, click Select for Prometheus.

4. In the Add data source page Settings tab, update the configurations for Prometheus as follows:

   

   1. Click Default to make Prometheus the default data source.

   2. Under HTTP, enter http://localhost:9090 as the URL.

   3. Click Save & Test.

   If the data source is successfully configured, it is indicated via a message.

   

Step 1.5 - Load dashboards into Grafana

WSO2 Streaming Integrator offers pre-built dashboards for monitoring streaming data flows and server statistics. Follow the instructions below to import the Grafana dashboards:

1. Download the required JSON file based on the statistics you need to view from here.

   Statistics Type	Directory
   General Statistics	general-statistics
   EFL Flow Statistics	cdc-statistics
   	file-statistics
   	http-statistics
   	kafka-statistics
   	overview-statistics
   	rdbms-statistics

2. Start Grafana and access it via http://localhost:3000/.

3. Import a new dashboard.

4. Click on the plus icon (+) in the side panel.

5. Then click Import.
6. In the Import page, click Upload .json file.
7. Then browse and select the .json file of the preconfigured dashboard that you downloaded in step 1.5 - (1.).
8. If required, change the unique identifier displayed in the Unique Identifier (uid).
9. Click Import.

Note

Optionally, you can organize the dashboards in folders and delete the dashboards if required.

Step 2 - View dashboards

Follow the instructions below to view a dashboard:

1. In the left pane, click on the Dashboards icon, and then click Manage to open the Dashboards page.

2. To expand the folder that contains the dashboard you want to view, click on it.

   

3. Click on the specific dashboard that you want to view.

   

4. Once the dashboard opens, click on the bar shown below to expand it and specify the time range for which you want to view statistics.

   

   Once you expand the time range bar, you can select the required time interval or specify a custom time interval.

   

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