Trace Context

W3C Trace Context header propagation

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Category: Practical
Task: W3C Trace Context header propagation

Prerequisites: The product runtime and any backend services referenced by this configuration.

This configuration comes from the selected release. The example has not been run here; external services are not bundled.

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# Trace Context Propagation
#
# W3C Trace Context header propagation. Parses incoming
# traceparent/tracestate, joins existing traces or starts
# new ones, and injects updated headers upstream.
# request_id provides a correlation ID alongside tracing.
#
# Usage:
#   cargo run -p praxis-proxy -- -c examples/configs/observability/trace-context.yaml
#   curl -H 'traceparent: 00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-01' http://localhost:8080/

listeners:
  - name: default
    address: "127.0.0.1:8080"
    filter_chains:
      - main

filter_chains:
  - name: main
    filters:
      - filter: request_id

      - filter: trace_context

      - filter: router
        routes:
          - path_prefix: "/"
            cluster: backend

      - filter: load_balancer
        clusters:
          - name: backend
            endpoints:
              - "127.0.0.1:3000"

insecure_options:
  allow_private_endpoints: true # example proxies to local backends