Like Prometheus, but for logs.

prometheushacktoberfestgrafanacloudnativeloggingloki

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Owen Diehl eaa0919e53 Use labelbuilder in syntax.ParseLabels to remove empty label values (#7355) ... There's a bug in TSDB where empty label values alter the series fingerprints used in chunk addresses, but are stripped out and create different fingerprints in our TSDB based index. I plan to open a PR to Prometheus, but I also prefer normalizing labels here by removing empty label values. According to [Prometheus](https://prometheus.io/docs/concepts/data_model/), > A label with an empty label value is considered equivalent to a label that does not exist. Our bug comes from the Prometheus model `LabelBuilder` stripping out empty label values, [here](https://github.com/grafana/loki/blob/main/vendor/github.com/prometheus/prometheus/model/labels/labels.go#L419-L423). This means that `Labels.NewBuilder({job="foo",bar=""}) => {job="foo"}`. The [labels.Hash()](https://github.com/grafana/loki/blob/main/vendor/github.com/prometheus/prometheus/model/labels/labels.go#L136-L182) function does not skip empty label values, meaning it's easy to end up with different fingerprints for effectively the same series (an empty label value is supposed to be equivalent to a missing label in prometheus, but they generate different label hashes).		3 years ago
..
log	Restoring lint checks that were previously disabled (#7340)	3 years ago
syntax	Use labelbuilder in syntax.ParseLabels to remove empty label values (#7355)	3 years ago
vector	Refactor LogQL syntax into its own package (#5539)	4 years ago
downstream.go	Loki: Improve query timeouts behavior (#7230)	3 years ago
downstream_test.go	Add label_replace and literal expressions to instant query split by range (#6515)	4 years ago
engine.go	Loki: Improve query timeouts behavior (#7230)	3 years ago
engine_test.go	[new feature] logql engine support exec `vector(0)` grama (#7023)	3 years ago
evaluator.go	[new feature] logql engine support exec `vector(0)` grama (#7023)	3 years ago
evaluator_test.go	Refactor LogQL syntax into its own package (#5539)	4 years ago
limits.go	Adapt queryTimeout to be a per-tenant configuration (#6835)	3 years ago
mapper_metrics.go	query_frontend_shard_factor uses exponential buckets (#6689)	4 years ago
matchers.go	Refactor LogQL syntax into its own package (#5539)	4 years ago
matchers_test.go	Refactor LogQL syntax into its own package (#5539)	4 years ago
matrix.go	Do not insert point when missing when sharding (#5444)	4 years ago
matrix_test.go	Do not insert point when missing when sharding (#5444)	4 years ago
metrics.go	Adding "start_delta" entry to metrics.go line (#6550)	3 years ago
metrics_test.go	Adding "start_delta" entry to metrics.go line (#6550)	3 years ago
optimize.go	Naïve fix for optimize bug with `line_format` and `json` expression parser (#6375)	4 years ago
optimize_test.go	Naïve fix for optimize bug with `line_format` and `json` expression parser (#6375)	4 years ago
range_vector.go	Add unwrapped aggregation `rate_counter()` (#6412)	4 years ago
range_vector_test.go	Refactor LogQL syntax into its own package (#5539)	4 years ago
rangemapper.go	Restoring lint checks that were previously disabled (#7340)	3 years ago
rangemapper_test.go	Fix rangemapper with VectorExpr support (#7288)	3 years ago
shardmapper.go	[bugfix] logql: vectorExpr run fail when query_range: parallelise_shardable_queries: true (#7045)	3 years ago
shardmapper_test.go	Fix rangemapper with VectorExpr support (#7288)	3 years ago
step_evaluator.go	fixes a badly referenced variable name in StepEvaluator code (#3996)	5 years ago
test_utils.go	[TSDB] Use index sampling to determine shard factor (#6396)	4 years ago
vector.go	LogQL: Vector and Range Vector Aggregation.	6 years ago