bvandeusenandClaude Opus 5.5
98440d8de6
One metrics URL can reach several Traefik processes: a swarm service's replicas behind the routing mesh or its VIP, a Kubernetes Service's pods, a keepalived pair after failover, or the same Traefik after a restart. Each keeps its own counters, so comparing one with another read the second one's lifetime totals as new traffic: retired routers flashed 100% 502 and an idle router showed 834 req/s whenever the scrape moved to the other replica. Each scrape is now keyed by Traefik's process_start_time_seconds and compared only with the same process's previous scrape. A process seen for the first time (or not in the last hour) sets its baseline and counts nothing. Without a start time every scrape is one process, as before. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>