Searchvarnish-otel now supports using a Prometheus exporter via OTEL_METRICS_EXPORTER=prometheus. Metrics are exposed on an HTTP /metrics endpoint for Prometheus to scrape.
New environment variables:
OTEL_EXPORTER_PROMETHEUS_HOST: bind host for the /metrics endpoint, defaulting to localhost. When running in a container, set this to 0.0.0.0 to bind on all interfaces.OTEL_EXPORTER_PROMETHEUS_PORT: bind port for the /metrics endpoint, defaulting to 9464.Other changes:
MSE4_BOOK.<book_name>.c_ykey_iter_{10ms,100ms,1000ms,1000ms_up} are now translated into a single histogram metric varnish.mse4.book.ykey.duration_seconds.bucket with le attributes (0.01, 0.1, 1, +inf), eliminating the need for label_replace workarounds in dashboards.ubuntu:resolute (Ubuntu 26.04 LTS).OTEL_VARNISH_DISABLE_LOGGERS can be set to true to preserve resource if logging data isn’t needed.TraceID, SpanID, TraceFlags are now also exported as native top log attributes, instead of just as regular log attributes.Important: TraceID, SpanID, TraceFlags as regular logs attributes are now deprecated and will be removed in the next major release.