The Prometheus monitoring system and time series database.

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Łukasz Mierzwa 070e409dba Add prometheus_ready metric (#10682) ... When Prometheus starts it can take a long time before WAL is replayed and it can do anything useful. While it's starting it exposes metrics and other Prometheus servers can scrape it. We do have alerts that fire if any Prometheus server is not ingesting samples and so far we've been dealing with instances that are starting for a long time by adding a check on Prometheus process uptime. Relying on uptime isn't ideal because the time needed to start depends on the number of metrics scraped, and so on the amount of data in WAL. To help write better alerts it would be great if Prometheus exposed a metric that tells us it's fully started, that way any alert that suppose to notify us about any runtime issue can filter out starting instances. Signed-off-by: Łukasz Mierzwa <l.mierzwa@gmail.com>		4 years ago
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prometheus	Add prometheus_ready metric (#10682)	4 years ago
promtool	promtool: support matchers when querying label values (#10727)	4 years ago