Introduce DefaultTSDBRetentionConfig, populated from CLI flags before any
config file is loaded, so that retention falls back to CLI flags when the
config file has no storage.tsdb section. Config.UnmarshalYAML always injects
a non-nil TSDBConfig with those defaults, removing the need for nil checks in
main.go. ApplyConfig in web.go now propagates retention settings on each
config reload so the runtime info endpoint stays up to date.
Signed-off-by: Julien Pivotto <291750+roidelapluie@users.noreply.github.com>
We should never modify (or even shallow copy) Config after config.Load;
added comments and modified GetScrapeConfigs to do so. For GetScrapeConfigs
the validation (even repeated) was likely doing writes (because global fields was 0). We GetScrapeConfigs concurrently
in tests and ApplyConfig causing test races. In prod there were
races but likelyt only to replace 0 with 0, so not too severe.
I removed validation since I don't see anyone using our config.Config without Load.
I had to refactor one test that was doing it, all others use yaml config.
Fixes#15538
Previous attempt: https://github.com/prometheus/prometheus/pull/15634
Signed-off-by: bwplotka <bwplotka@gmail.com>
Add the ability to adjust the `GOGC` variable from the Prometheus
configuration file.
* Create a new top-level `runtime` section in the config.
* Adjust from the Go default of 100 to 50 to reduce wasted memory.
* Use the `GOGC` env value if no configuraiton is used.
Signed-off-by: SuperQ <superq@gmail.com>
This also fixes a bug in query_log_file, which now is relative to the config file like all other paths.
Signed-off-by: Andy Bursavich <abursavich@gmail.com>
