VictoriaMetrics/lib/promscrape/discovery/yandexcloud
Zakhar Bessarab da4352fe7b
lib/{promauth,promscrape}: automatically refresh root CA certificates after changes on disk (#5725)
* lib/{promauth,promscrape}: automatically refresh root CA certificates after changes on disk

Added a custom `http.RoundTripper` implementation which checks for root CA content changes and updates `tls.Config` used by `http.RoundTripper` after detecting CA change.

Client certificate changes are not tracked by this implementation since `tls.Config` already supports passing certificate dynamically by overriding `tls.Config.GetClientCertificate`.

This change implements dynamic reload of root CA only for streaming client used for scraping. Blocking client (`fasthttp.HostClient`) does not support using custom transport so can't use this implementation.

See: https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5526

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>

* lib/promauth/config: update NewRoundTripper API

Update API to allow user to update only parameters required for transport.

Add warning log when reloading Root CA failed.

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>

* lib/promauth/config: fix mutex acquire logic

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>

* lib/promauth/config: replace RWMutex with regular mutex to simplify the code

- remove additional mutex used for getRootCABytes - require callee to use mutex
- replace RWMutex with regular mutex

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>

* lib/promauth/config: refactor

- hold the mutex lock to avoid round tripper being re-created twice
- move recreation logic into separate func to simplify the code

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>

---------

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>
Co-authored-by: Nikolay <nik@victoriametrics.com>
2024-04-04 00:34:43 +03:00
..
api.go lib/{promauth,promscrape}: automatically refresh root CA certificates after changes on disk (#5725) 2024-04-04 00:34:43 +03:00
instance_test.go lib/promscrape: optimize service discovery speed 2022-11-29 21:26:23 -08:00
instance.go lib/promscrape: optimize service discovery speed 2022-11-29 21:26:23 -08:00
yandexcloud.go lib/promauth: follow-up for e16d3f5639 2023-10-26 09:55:47 +02:00