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Callum Styan 5a85f6647e Add initial implementation of per-query limits (#8727) ... **What this PR does / why we need it**: Sometimes we want to limit the impact of a single query by imposing limits that are stricter than the current tenant limit. E.g. the maximum query length could be seven days but based on the query or an admins decision a query should just have a maximum length of one day. This is where per-request limits come into play. They are passed via the `X-Loki-Query-Limit` header and extracted into the requests context. It is the responsibility of the operator or admin that the header is valid. **Which issue(s) this PR fixes**: Fixes #8762 **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [x] Tests updated - [x] `CHANGELOG.md` updated - [x] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` --------- Signed-off-by: Callum Styan <callumstyan@gmail.com> Co-authored-by: Karsten Jeschkies <karsten.jeschkies@grafana.com>		3 years ago
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api	Docs: Add doc-validator tool to lint technical documentation (#6569)	3 years ago
best-practices	doc(best-practices): Update default value of `max_chunk_age`. (#8685)	3 years ago
clients	Fixing broken link (404) (#8688)	3 years ago
community	Fix documentation linter errors (#8229)	3 years ago
configuration	Add initial implementation of per-query limits (#8727)	3 years ago
design-documents	Fix documentation linter errors (#8229)	3 years ago
fundamentals	[Docs] Adding context to Istio installation. (#8248)	3 years ago
getting-started	Loki Getting Started: Fix example query that was not working (#8668)	3 years ago
installation	[CI/CD] Update yaml file `./production/helm/loki/values.yaml` (+1 other) (#8655)	3 years ago
lids	LID: Improve scheduler to control QoS across users within a tenant (#8585)	3 years ago
logql	Add logfmt selective label extraction (#6675)	3 years ago
maintaining	Fix documentation linter errors (#8229)	3 years ago
operations	Fixing broken link and removing out of date blog post. (#8632)	3 years ago
release-notes	Reflect release 2.7.3 on main branch (#8372)	3 years ago
rules	Fix documentation linter errors (#8229)	3 years ago
storage	tsdb docs first pass (#8048)	3 years ago
tools	logcli: Add parallel flags (#8518)	3 years ago
upgrading	Fix documentation linter errors (#8229)	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)	6 years ago
logo_and_name.png	Sync docs to website (#2378)	6 years ago