*Empty activeAlertmanagers list after executing reload method (0.001...5
sec)*
1 Run prometheus with params (go run cmd/prometheus/main.go
--config.file=config.yaml --web.enable-lifecycle)
config.file:
```yaml
alerting:
alertmanagers:
- http_sd_configs:
- refresh_interval: 20s
url: http://xxx
timeout: 1m
```
2 make request curl -sXPOST http://localhost:9090/-/reload
3 and then you can try to open next url as quickly as
possible http://localhost:9090/api/v1/alertmanagers
4 Output will be empty. looks like:
```
{ "status": "success", "data": { "activeAlertmanagers": [],
"droppedAlertmanagers": [] } }
```
5 Only after executing a piece of code Prometheus will update the
configuration content.
refs:
https://github.com/prometheus/prometheus/tree/main/notifier/notifier.go#L309
^
https://github.com/prometheus/prometheus/tree/main/discovery/legacymanager/manager.go#L243
^
https://github.com/prometheus/prometheus/tree/main/discovery/legacymanager/manager.go#L97
*as a result, prometheus has a time window from 0.0001 to 5 seconds when
downtime is possible. How do you cope with such a task?*
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