The Jaeger and Prometheus integration requires World CLI v1.3.1 or higher.

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Enabling Monitoring

To enable this feature, run the following command: 
world cardinal start --telemetry
By default, this will start both the Jaeger and Prometheus containers. You can access the Jaeger Web UI at http://localhost:16686: Screenshot of Jaeger UI And the Prometheus Web UI at http://localhost:9090: Screenshot of Prometheus UI

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Configuration

You can configure some of the behavior of Jaeger and Prometheus by editing your world.toml file. Currently, only these options are supported: Example configuration: 
[nakama]
NAKAMA_TRACE_ENABLED = true
NAKAMA_TRACE_SAMPLE_RATE = 0.6
NAKAMA_METRICS_ENABLED = true
NAKAMA_METRICS_INTERVAL = 30

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NAKAMA_TRACE_ENABLED

Enable tracing with Jaeger. Defaults to true.

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NAKAMA_TRACE_SAMPLE_RATE

The trace sample rate. Defaults to 0.6. Only float values between 0 and 1 are accepted.

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NAKAMA_METRICS_ENABLED

Enable metrics collection with Prometheus. Defaults to true.

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NAKAMA_METRICS_INTERVAL

How frequently should the metrics be updated, in seconds. Defaults to every 30 seconds.