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Question1 answer2,049 followingPosted 15 May 2020, 11:17 UTC53.6K views1,290 votes

Built‑in /metrics endpoint versus external Prometheus for Rancher memory leak detection under a 15‑second scrape interval

Evaluating Rancher memory leak detection options Goal: Choose between Rancher’s native /metrics endpoint and an external Prometheus stack from the monitoring catalog to identify upward memory trends in the server or agent components. Constraint: The Rancher HA setup recommends a metrics scrape interval of no more than 15 seconds to limit overhead, yet the ag

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rancher

prometheus monitoring

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Question1 answer1,767 followingPosted 23 Jan 2020, 01:11 UTC67.9K views4,621 votes

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HTTP 504 Gateway Timeout during high-cardinality PromQL execution

Query Timeout Behavior in Prometheus Prometheus utilizes a global --query.timeout flag to prevent resource exhaustion from long-running queries. While the HTTP API allows for per-request timeout overrides, the server must manage the lifecycle of the underlying PromQL engine process when these limits are reached or when a client abruptly closes the connection

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prometheus promql http-api