chore(server): set Content-Type header on Prom metrics endpoint
#1651
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sbruens
changed the title
Content-Type headerContent-Type header on Prom metrics endpoint
fortuna
approved these changes
Mar 10, 2025
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This will unblock upgrading to Prometheus v3.
"Prometheus v3 is more strict concerning the
Content-Typeheader received when scraping. Prometheus v2 would default to the standard Prometheus text protocol if the target being scraped did not specify a Content-Type header or if the header was unparsable or unrecognised. This could lead to incorrect data being parsed in the scrape. Prometheus v3 will now fail the scrape in such cases." See https://prometheus.io/docs/prometheus/latest/migration/#scrape-protocols.