Like Prometheus, but for logs.

prometheushacktoberfestgrafanacloudnativeloggingloki

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Alexandru Gologan f785faa820 Helm: add additionalRuleLabels to PrometheusRule alerts (#9020) ... **What this PR does / why we need it**: Adds the ability to specify other labels on the Prometheus alerts. Specifying: ```yaml monitoring: rules: additionalRuleLabels: custom_label: custom_value ``` will add it to all alerts: ```yaml - alert: LokiRequestErrors annotations: ... expr: ... for: 15m labels: severity: critical custom_label: custom_value ``` This approach is inspired by: [kube-prometheus-stack/rules](https://github.com/prometheus-community/helm-charts/blob/main/charts/kube-prometheus-stack/templates/prometheus/rules-1.14/general.rules.yaml) Though in their case they run [sync_prometheus_rules.py](https://github.com/prometheus-community/helm-charts/blob/main/charts/kube-prometheus-stack/hack/sync_prometheus_rules.py) to create the `tpl`. I can understand if this is not the approach (manual) you want to take as editing the tpl adding the labels everywhere and escaping go tpl `{{ }}` is quite painful. **Which issue(s) this PR fixes**: N/A **Special notes for your reviewer**: **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [x] Documentation added - [x] Tests updated - [ ] `CHANGELOG.md` updated - [x] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md`		3 years ago
..
alert	Update doc-validator to v3.0.0 (#9666)	3 years ago
best-practices	Update doc-validator to v3.0.0 (#9666)	3 years ago
clients	Update _index.md (#9028)	3 years ago
community	Adding 3 existing maintainers, and our newest one: Ashwanth! (#9741)	3 years ago
configuration	Add log-volume feature flag (#9762)	3 years ago
get-started	TOC Sync: Move files under Get Started. (#9717)	3 years ago
installation	Helm: add additionalRuleLabels to PrometheusRule alerts (#9020)	3 years ago
operations	TOC Sync: Move files under Get Started. (#9717)	3 years ago
query	Add keep stage to LogQL (#9693)	3 years ago
reference	Removing 'please' from the docs. (#9658)	3 years ago
release-notes	TOC Sync: Move files under Get Started. (#9717)	3 years ago
storage	Update doc-validator to v3.0.0 (#9666)	3 years ago
upgrading	Add shuffle sharding to index gateway (#9710)	3 years ago
visualize	TOC Sync: Move LogQL and LogCLI files under Query. (#9200)	3 years ago
_index.md	Docs: Add doc-validator tool to lint technical documentation (#6569)	3 years ago
logo.png	Sync docs to website (#2378)	5 years ago
logo_and_name.png	Sync docs to website (#2378)	5 years ago