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Will Bollock b70a871988 fix(discovery): delete expired refresh metrics on reload (#17614) ... Building off config-specific Prometheus refresh metrics from an earlier PR (https://github.com/prometheus/prometheus/pull/17138), this deletes refresh metrics like `prometheus_sd_refresh_duration_seconds` and `prometheus_sd_refresh_failures_total` when the underlying scrape job configuration is removed on reload. This reduces un-needed cardinality from scrape job specific metrics while still preserving metrics that indicate overall health of a service discovery engine. For example, `prometheus_sd_refresh_failures_total{config="linode-servers",mechanism="linode"} 1` will no longer be exported by Prometheus when the `linode-servers` scrape job for the Linode service provider is removed. The generic, service discovery specific `prometheus_sd_linode_failures_total` metric will persist however. * fix: add targetsMtx lock for targets access * test: validate refresh/discover metrics are gone * ref: combine sdMetrics and refreshMetrics Good idea from @bboreham to combine sdMetrics and refreshMetrics! They're always passed around together and don't have much of a reason not to be combined. mechanismMetrics makes it clear what kind of metrics this is used for (service discovery mechanisms). --------- Signed-off-by: Will Bollock <wbollock@linode.com>		1 month ago
..
alert.go	Remove copyright date from headers (#17785)	4 months ago
alertmanager.go	Remove copyright date from headers (#17785)	4 months ago
alertmanager_test.go	feat(notifier): independent alertmanager sendloops (#16355)	4 months ago
alertmanagerset.go	feat(notifier): independent alertmanager sendloops (#16355)	4 months ago
manager.go	fix(notify): apply config sendloop cleanup fix (#17915)	4 months ago
manager_test.go	fix(discovery): delete expired refresh metrics on reload (#17614)	1 month ago
metric.go	feat(notifier): independent alertmanager sendloops (#16355)	4 months ago
sendloop.go	feat(notifier): independent alertmanager sendloops (#16355)	4 months ago
sendloop_test.go	feat(notifier): independent alertmanager sendloops (#16355)	4 months ago
util.go	Remove copyright date from headers (#17785)	4 months ago
util_test.go	feat(notifier): independent alertmanager sendloops (#16355)	4 months ago