docs: instrumentation examples

[shorgi]

Add example configurations for common use cases of selectors and conditions

Fast follows:

1. Add examples to other router telemetry reference pages
2. Integrate or move router telemetry reference content into Routing section

[svc-apollo-docs]

✅ Docs Preview Ready

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[router-perf]

CI performance tests

• connectors-const - Connectors stress test that runs with a constant number of users
• const - Basic stress test that runs with a constant number of users
• demand-control-instrumented - A copy of the step test, but with demand control monitoring and metrics enabled
• demand-control-uninstrumented - A copy of the step test, but with demand control monitoring enabled
• enhanced-signature - Enhanced signature enabled
• events - Stress test for events with a lot of users and deduplication ENABLED
• events_big_cap_high_rate - Stress test for events with a lot of users, deduplication enabled and high rate event with a big queue capacity
• events_big_cap_high_rate_callback - Stress test for events with a lot of users, deduplication enabled and high rate event with a big queue capacity using callback mode
• events_callback - Stress test for events with a lot of users and deduplication ENABLED in callback mode
• events_without_dedup - Stress test for events with a lot of users and deduplication DISABLED
• events_without_dedup_callback - Stress test for events with a lot of users and deduplication DISABLED using callback mode
• extended-reference-mode - Extended reference mode enabled
• large-request - Stress test with a 1 MB request payload
• no-tracing - Basic stress test, no tracing
• reload - Reload test over a long period of time at a constant rate of users
• step-jemalloc-tuning - Clone of the basic stress test for jemalloc tuning
• step-local-metrics - Field stats that are generated from the router rather than FTV1
• step-with-prometheus - A copy of the step test with the Prometheus metrics exporter enabled
• step - Basic stress test that steps up the number of users over time
• xlarge-request - Stress test with 10 MB request payload
• xxlarge-request - Stress test with 100 MB request payload

[shorgi]

!docs preview main

[shorgi]

!docs preview main

[shorgi]

!docs preview main

[BrynCooke]

This will create a high cardinality metric:

A better example is this:

telemetry:
  exporters:
    metrics:
      prometheus:
        enabled: true
  instrumentation:
    instruments:
      supergraph:
        my.request.on_graphql_error:
          value: event_unit
          type: counter
          unit: error
          description: my description
          condition:
            exists:
              response_errors: "$.[0].extensions.code"
          attributes:
            response_errors:
              response_errors: "$.[0].extensions.code"