86 Commits (main)

Author	SHA1	Message	Date
Jackson Coelho	d3c54b09fe	chore(build): update loki build image (#19473) ... Co-authored-by: George Robinson <george.robinson@grafana.com>	3 months ago
Sophie Waldman	98b411a649	chore(linter): Fix issues flagged by updated golangci-lint version (#19206)	3 months ago
Shantanu Alshi	3ffed72f64	refactor: Upgrade to Prometheus to main (#18418) ... Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com> Signed-off-by: Shantanu Alshi <shantanu.alshi@grafana.com> Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com> Co-authored-by: Bryan Boreham <bjboreham@gmail.com> Co-authored-by: Ashwanth <iamashwanth@gmail.com>	6 months ago
renovate[bot]	8b265ede15	fix(deps): update module github.com/prometheus/common to v0.64.0 (main) (#16750) ... Signed-off-by: Paul Rogers <129207811+paul1r@users.noreply.github.com> Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com> Co-authored-by: Paul Rogers <paul.rogers@grafana.com> Co-authored-by: Paul Rogers <129207811+paul1r@users.noreply.github.com>	7 months ago
Oleg Zaytsev	c8a15f451c	refactor: Use OTel tracing library (#17859) ... Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>	7 months ago
Karsten Jeschkies	cf4b0d8372	refactor(stringlabels): Support stringlabels in querier (#17238)	9 months ago
Karsten Jeschkies	c49eeba326	refactor(stringlabels): Support stringlabels in querier tests (#17088) ... **What this PR does / why we need it**: This is the first step of support Prometheus `stringlabels` implementation in Loki. **Special notes for your reviewer**: The tests should compile with build tag `stringlabels`.	9 months ago
renovate[bot]	b37eefe24f	fix(deps): update github.com/prometheus/prometheus (main) (#15950) ... Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com> Co-authored-by: Paul Rogers <paul.rogers@grafana.com>	10 months ago
renovate[bot]	0ad17ebcf4	fix(deps): update module github.com/influxdata/telegraf to v1.33.0 (#15456) ... Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com> Co-authored-by: Paul Rogers <paul.rogers@grafana.com> Co-authored-by: Trevor Whitney <trevorjwhitney@gmail.com>	1 year ago
Eng Zer Jun	062d1e9ca4	refactor: replace experimental `maps` and `slices` with stdlib (#15051) ... Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>	1 year ago
Trevor Whitney	b5462b6639	chore: remove copied loop vars (#14383)	1 year ago
Christian Haudum	3beb8ff9cf	fix(build): Use Debian Bullseye base image for build image (#14368) ... This change is necessary to allow the binaries built using the Loki build image to run on operating systems with older libc version. Signed-off-by: Christian Haudum <christian.haudum@gmail.com>	1 year ago
Paul Rogers	18cef217fc	chore: Linting updates in prep for Go 1.23 (#14071)	1 year ago
Callum Styan	b1802971c2	chore: log the query from the request when we're unable to get a result from the results cache (#13915) ... Signed-off-by: Callum Styan <callumstyan@gmail.com>	1 year ago
Marco Pracucci	b88583da7d	feat: upgrade prometheus (#13671) ... Signed-off-by: Marco Pracucci <marco@pracucci.com> Signed-off-by: Vladyslav Diachenko <vlad.diachenko@grafana.com> Co-authored-by: Vladyslav Diachenko <vlad.diachenko@grafana.com>	1 year ago
Ed Welch	d3e1edbf11	fix: fix retry code to handle grpc status codes. updated newer stats retries to be wrapped with spans (#13592) ... Signed-off-by: Edward Welch <edward.welch@grafana.com>	1 year ago
Ed Welch	7232795e1f	fix: add a retry middleware to all the stats handlers (#13584) ... Signed-off-by: Edward Welch <edward.welch@grafana.com>	1 year ago
Ashwanth	a457c5d171	fix(retry): fix retries when using protobuf encoding (#13316)	2 years ago
Dylan Guedes	c1fada9af0	refactor: Remove unnecessary spanlogger usage (#13255) ... Historically, we've been using `spanlogger` to enrich our spans. That isn't the right usage for it (as of now), as they'll be emitting log lines. Our current usage is causing: - Noisy/important log lines less visible - Unnecessary logging volume - Spread of the bad practice. With this PR I'm moving away from `spanlogger` all places where the log message is too bad or nonexistent. That's because these cases are indicating we don't care about that log line at all, and only about the data injected in the span.	2 years ago
Karsten Jeschkies	6e4555010e	fix: Introduce feature flag for [last|first]_over_time sharding. (#13067)	2 years ago
Trevor Whitney	af09f53a33	ci: release workflows get build image from makefile (#12778)	2 years ago
Travis Patterson	cf04ec1320	feat: Enable warnings in Loki query responses (#12425)	2 years ago
Ed Welch	4c88be0ef2	chore: update loki modules for 3.0 release (#12433) ... Signed-off-by: Edward Welch <edward.welch@grafana.com>	2 years ago
Callum Styan	018856c1c1	fix: fix span logging based on changes to request types timestamps (#12393) ... Signed-off-by: Callum Styan <callumstyan@gmail.com>	2 years ago
Kaviraj Kanagaraj	7480468e0f	fix: (Bug) correct resultType when storing instant query results in cache (#12312) ... Signed-off-by: Kaviraj <kavirajkanagaraj@gmail.com>	2 years ago
Ashwanth	9e7725b31b	feat(metadata): introduce a separate split interval for recent query window (#11897)	2 years ago
Karsten Jeschkies	8dde7b9d49	Support tail requests with protobuf encoding. (#11426) ... **What this PR does / why we need it**: The `TailRequest` would use `bytes plan` instead of `Plan plan`. The former is not well supported in gogoprotobuf. **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [x] Tests updated - [ ] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) - [ ] If the change is deprecating or removing a configuration option, update the `deprecated-config.yaml` and `deleted-config.yaml` files respectively in the `tools/deprecated-config-checker` directory. [Example PR](0d4416a4b0)	2 years ago
Karsten Jeschkies	f67fff3eb2	Approximate `quantile_over_time` (#10417) ... **What this PR does / why we need it**: This change shards `quantile_over_time` queries using t-digest or DDSketch approximations. It can be enabled with `querier.shard_aggregations=quantile_over_time`. Outstanding - [x] Replace generic return type of `StepEvaluator` with interface `StepResult`. - [x] Send mapped query with quantile sketch expression from frontend to querier over the wire. - [x] Serialize sketches. See https://github.com/influxdata/tdigest/issues/34 - [x] Add feature flag. **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [x] Documentation added - [x] Tests updated - [x] `CHANGELOG.md` updated - [x] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [x] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) --------- Signed-off-by: Callum Styan <callumstyan@gmail.com> Co-authored-by: Callum Styan <callumstyan@gmail.com>	2 years ago
Salva Corts	489ac8d529	Extract results cache into new pkg (#11343) ... **What this PR does / why we need it**: This extracts the results cache from `queryrangebase` into its own pkg so we can reuse it in other components such as the bloom-gateway without having to import `queryrangebase`. - Most of the logic inside `pkg/querier/queryrange/queryrangebase/results_cache.go` now lives in `pkg/storage/chunk/cache/results_cache/cache.go`. - Some of the tests in `pkg/querier/queryrange/queryrangebase/results_cache.go` are moved into pkg/storage/chunk/cache/results_cache/cache_test.go. - Note that here we don't have access to the types we use in `queryrangebase` so we created a new set of mock request/response types to test with.	2 years ago
Kaviraj Kanagaraj	30d0030bf9	inflight-logging: Add extra metadata to inflight requests logging (#11243) ... **What this PR does / why we need it**: logging: Add extra metadata to inflight requests This adds extra metadata (similar to what we have in `metrics.go`) but for queries in in-flight (both started and retrying) Changes: Adds following data 1. Query Hash 2. Start and End time 3. Start and End delta 4. Length of the query 5. Moved the helper util to `queryutil` package because of cyclic dependencies with `logql` package. **Which issue(s) this PR fixes**: Fixes #<issue number> **Special notes for your reviewer**: Find the screenshots of log entries looks like (both in `retry.go` and `roundtrip.go`)   **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [x] Tests updated - [x] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) - [ ] If the change is deprecating or removing a configuration option, update the `deprecated-config.yaml` and `deleted-config.yaml` files respectively in the `tools/deprecated-config-checker` directory. [Example PR](0d4416a4b0) --------- Signed-off-by: Kaviraj <kavirajkanagaraj@gmail.com>	2 years ago
Karsten Jeschkies	05c4b77ed0	Define QueryResponse and QueryRequest protobufs. (#10956) ... **What this PR does / why we need it**: This will be a follow up to https://github.com/grafana/loki/pull/10688 finally switching over to protos. Hang on tight! Everything is behind the feature flag `-frontend.encoding=protobuf` which will disable the transcoding to HTTP and HTTPgRPC. **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 - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) --------- Signed-off-by: Callum Styan <callumstyan@gmail.com> Co-authored-by: Callum Styan <callumstyan@gmail.com> Co-authored-by: Danny Kopping <dannykopping@gmail.com>	2 years ago
Karsten Jeschkies	979530b6b9	Propagate query metrics and cache num information. (#11176) ... **What this PR does / why we need it**: https://github.com/grafana/loki/pull/10858 removed the extraction of the query time header on the querier side and the generation of the cache number. This change adds them back and uses the headers of the response format. **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [ ] Tests updated - [ ] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) - [ ] If the change is deprecating or removing a configuration option, update the `deprecated-config.yaml` and `deleted-config.yaml` files respectively in the `tools/deprecated-config-checker` directory. [Example PR](0d4416a4b0) --------- Signed-off-by: Edward Welch <edward.welch@grafana.com> Co-authored-by: Edward Welch <edward.welch@grafana.com>	2 years ago
Michel Hollands	8628b15624	Use metrics namespace for more metrics (#11025) ... **What this PR does / why we need it**: Use the metrics namespace setting instead of hardcoding to `cortex`. This is a follow up to (and based on) https://github.com/grafana/loki/pull/11014. **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [X] Tests updated - [x] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) - [ ] If the change is deprecating or removing a configuration option, update the `deprecated-config.yaml` and `deleted-config.yaml` files respectively in the `tools/deprecated-config-checker` directory. <!-- TODO(salvacorts): Add example PR --> --------- Signed-off-by: Michel Hollands <michel.hollands@gmail.com> Co-authored-by: Ashwanth <iamashwanth@gmail.com>	2 years ago
Callum Styan	557b516b66	Refactor the proto Request interface to return time.Time (#11018) ... Part of our query path improvements. In addition to Karstens new protobuf formats for all the query request and responses, plus our use of just proto grpc rather than httpgrpc, we'd like refactor the proto Request interface to return time.Time for start and end instead of int64. This will allow his protobuf formats to use more `logproto` proto types. There's still one or two tests that I need to fix. --------- Signed-off-by: Callum Styan <callumstyan@gmail.com> Co-authored-by: Karsten Jeschkies <karsten.jeschkies@grafana.com>	2 years ago
Karsten Jeschkies	6948c4a179	Turn frontend Tripperware into a Middleware. (#10688) ... **What this PR does / why we need it**: Currently, a request to Loki's frontend API goes through these conversions: ``` http.Request ↓ limitedRoundTripper queryrangebase.Request ↓ queryrangebase.Middlware … ↓ queryrangebase.Request ↓ limitedRoundTripper http.Request ↓ grpcRoundTripperAdapter httpgrpc ↓ grpcRoundTripperAdapter http.Response ↓ limitedRoundTripper queryrangebase.Response ↓ limitedRoundtripper http.Response ``` Since `httgrpc` and `queryrangebase.Request` are Protobufs there's no good reason to encode and decode them to HTTP responses/requests. Furthermore, the encoding to HTTP makes it harder for us to encode query plans. Thus the conversions are changed to the following: ``` http.Request ↓ queryrangebase.Request ↓ queryrangebase.Middlware … ↓ queryrangebase.Request ↓ httpgrpc ↓ queryrangebase.Response ↓ http.Response ``` In order to achieve this the `http.RoundTripper` is pushed to the outside. Only the serialization layer from `http.Request` to `queryrangebase.Request` and `http.Response` to `queryrangebase.Response` will be an `http.RoundTripper`. Everything else is either a `queryrangebase.Handler` or `queryrangebase.Middleware`. **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [x] Tests updated - [ ] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec)	2 years ago
Ed Welch	d66dd30c17	Loki: introduce an exponential backoff on failed query retries. (#10959) ... **What this PR does / why we need it**: Currently any subquery which fails with a 5xx status code is retried by the query frontend immediately, and by default will make a total of 5 attempts to execute the subquery, ultimately failing the query if you exhaust those attempts. We notice there are times when subqueries can fail extremely quickly, mostly around queriers handling various GRPC related issues between components like ingesters or index gateways. In these cases a query will exhaust all the retries in less than a second and fail back to the user. Also in cases where a query is causing a lot of memory pressure on a pool of queriers leading to OOM crashes of queriers, the lack of a backoff on retries can make this behavior quite aggressive and potentially cause disruption if you don't have enough queriers available. This PR introduces a simple exponential backoff on retries of failed queries to allow for the downstream GRPC issues to have time to sort out as well as causing queries causing a lot of memory pressure and OOMing to be slowed down and minimize their impact slightly. **Which issue(s) this PR fixes**: Fixes #<issue number> **Special notes for your reviewer**: **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [ ] Tests updated - [x] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) --------- Signed-off-by: Edward Welch <edward.welch@grafana.com>	2 years ago
Shantanu Alshi	183d6f2c39	Upgrade prometheus to 0.47.1 and dskit (#10814)	2 years ago
Ashwanth	2902f986a4	cache: Enable embedded cache if no other cache is configured. (#10620) ... **What this PR does / why we need it**: FIFO cache is replaced by embedded-cache in https://github.com/grafana/loki/pull/6821 This PR enables embedded cache for query range results, chunks cache, index_stats_results and volume_results if no other cache is explicitly configured (redis, memcache). **Special notes for your reviewer**: Also removes a deprecated flag `cache-split-interval` **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [x] Tests updated - [x] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [x] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) --------- Co-authored-by: Christian Haudum <christian.haudum@gmail.com>	2 years ago
Shantanu Alshi	f1bbdc51dc	Remove split_queries_by_interval and forward_headers_list (#10395) ... …range config Removed split_queries_by_interval and forward_headers_list from query_range config The fields were deprecated and hence going to be removed in the next major version **What this PR does / why we need it**: **Which issue(s) this PR fixes**: Fixes #<issue number> **Special notes for your reviewer**: **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [ ] Tests updated - [x] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [x] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec)	2 years ago
Ashwanth	cc6634972f	config: deprecates unordered-writes and few unused configs (#10324) ... **What this PR does / why we need it**: Deprecates the following configs: out of order writes will be the default and the only format with the next major release - ingester.unordered-writes these need not be configurable, were added for testing - log.use-buffered - log.use-sync unused - frontend.forward-headers-list **Which issue(s) this PR fixes**: Fixes #<issue number> **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 - [ ] Tests updated - [ ] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec)	2 years ago
Charles Korn	bde65667f7	Upgrade dskit to use packages migrated from weaveworks/common (#10164) ... **What this PR does / why we need it**: This PR upgrades dskit and replaces use of packages from weaveworks/common with their migrated equivalents in dskit. See https://github.com/grafana/dskit/pull/342 for more details. Note that Loki still uses some packages from weaveworks/common that I haven't migrated (`aws` and `test`) - I'll migrate these separately. If this PR needs to be rebuilt, I used `rewrite.sh` ([source](https://gist.github.com/charleskorn/48efe62a09d6d70f3de30327003df5c5#file-rewrite-sh)) to generate most of these changes. **Which issue(s) this PR fixes**: (none) **Special notes for your reviewer**: (none) **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [n/a] Documentation added - [n/a] Tests updated - [n/a] `CHANGELOG.md` updated - [n/a] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [n/a] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_index.md` - [n/a] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) Co-authored-by: Kaviraj Kanagaraj <kavirajkanagaraj@gmail.com>	2 years ago
Karsten Jeschkies	b35bbd80d6	Support content negotiation between query frontend and querier. (#9813) ... **What this PR does / why we need it**: Currently, the querier sends results to the query frontend in JSON which is then decoded to Protobuf. It is more efficient to send the results as Protobuf. This will also allow to extend the results with custom data structures. The change is backwards compatible through content negotiation. **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 - [x] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec)	3 years ago
Trevor Whitney	4a56445686	Upgrade `golangci-lint` and fix linting errors (#9601) ... **What this PR does / why we need it**: Upgrade `golangci-lint` and fixes all the errors. The upgrade includes some stricter linting.	3 years ago
Salva Corts	73ac208981	Improve docs for empty value in cache compression config (#9649) ... **What this PR does / why we need it**: Follow up PR for https://github.com/grafana/loki/pull/9535#discussion_r1218167670 **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [x] Documentation added - [ ] Tests updated - [ ] `CHANGELOG.md` updated - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec)	3 years ago
Salva Corts	c6fbff26e1	Add config to avoid caching stats for recent data (#9537) ... **What this PR does / why we need it**: When we query the stats for recent data, we query both the ingesters and the index gateways for the stats. ebdb2b1800/pkg/storage/async_store.go (L112-L114) ebdb2b1800/pkg/storage/async_store.go (L126-L127) Then we merge all the responses, which means summing up all the stats ebdb2b1800/pkg/storage/async_store.go (L157-L158) ebdb2b1800/pkg/storage/stores/index/stats/stats.go (L23-L26) Because we have a replication factor of 3, this means that we will get the stats from the ingesters repeated up to 3 times, hence inflating the stats. In the stats cache, we store the stats for a given matcher set for the whole day, then we extract the stats from the cache by the factor of time from the request that is stored in the cache: 336283acad/pkg/querier/queryrange/index_stats_cache.go (L33) 336283acad/pkg/querier/queryrange/index_stats_cache.go (L40) Inflated stats for recent data will be cached, so subsequent stats extracted from the cache will be inflated regardless of the time. This PR adds a new per-tenant limit `max_stats_cache_freshness` to not cache requests with an end time that falls within Now minus this duration. Here's a scenario illustrating this. The graphs below show the bytes stats queried in the sharding middleware. We are running a log filter query that won't match any log, every 5 seconds with a length of 3h.  As can be seen, after enabling the stats cache and configuring`do_not_cache_request_within` to not cache stats for requests within 30m, the bytes stats used in the sharding middleware stopped increasing. In both cases the stats cache hit ration was 100%.  **Special notes for your reviewer**: - Blocked by https://github.com/grafana/loki/pull/9535 - Note that this PR doesn't fix the root issue of inflated stats form the ingesters, but rather buys us some time to work on that. **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 - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec)	3 years ago
Ivana Huckova	eb7dae4583	Loki: Improve error message when step too low (#9641) ... **What this PR does / why we need it**: In https://github.com/grafana/grafana/pull/69648 we are in Grafana introducing a step editor in Loki. Unfortunately, the error message when user sets too low step parameter is hard to understand, so I am proposing following change to make it more understandable and actionable. Let me know what do you think. --------- Co-authored-by: J Stickler <julie.stickler@grafana.com>	3 years ago
Salva Corts	1694ad0f9b	Stats cache can be configured independently (#9535) ... **What this PR does / why we need it**: Before this PR, the index stats cache would use the same config as the query results cache. This was a limitation since: 1. We would not be able to point to a different cache for storing the index stats if needed. 2. We would not be able to add specific settings for this cache, without adding it to the results cache. In this PR, we refactor the index stats cache config to be independently configurable. Note that if it's not configured, it will try to use the results cache settings. **Which issue(s) this PR fixes**: This is needed for: - https://github.com/grafana/loki/pull/9537 - https://github.com/grafana/loki/pull/9536 **Special notes for your reviewer**: - This PR also refactors all the tripperwares in rountrip.go to reuse the same stats tripperware instead of each one creating their own. - Configuring a new cache in rountrip.go is a requirement for https://github.com/grafana/loki/pull/9536 so the stats summary can distinguish before the stats cache and the results cache. **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [x] Documentation added - [x] Tests updated - [x] `CHANGELOG.md` updated - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec)	3 years ago
Salva Corts	87a659a6db	Add span events for index stats and result cache (#9552) ... **What this PR does / why we need it**: This PR adds events to the traces to have some extra observability for how we compute the index stats. We also add some trace events to the results cache.      **Special notes for your reviewer**: **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [ ] Tests updated - [ ] `CHANGELOG.md` updated - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec)	3 years ago
Peter Štibraný	90a1d4593e	Update Prometheus dependency (#9205)	3 years ago
Salva Corts	422560b6b1	Flag to disable index stats cache (#9177) ... **What this PR does / why we need it**: At https://github.com/grafana/loki/pull/8972 we started caching all index stats requests. If the results cache gets overloaded, it can quickly take down the rest of the loki cell due to all the increased work. This PR adds a new flag so we can easily disable caching index stats requests. **Which issue(s) this PR fixes**: This PR is a follow up for https://github.com/grafana/loki/pull/8972 **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 - [x] `CHANGELOG.md` updated - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md`	3 years ago