* Remove private labels
* No longer index by instance labels
* Labels are now invariant, only build them once
* Remove bucketing since everything is in a single stream
* Refactor statesToStreams to only return a single unified log stream
* Don't query on labels that no longer exist
* Move selector logic to loki layer, genericize client to work in terms of straight logQL
* Add support for line-level label filters in query
* Combine existing selector tests for better parallelism
* Tests for logQL construction
* Underscore instead of dot for unwrapping labels in logql
* Encode with snappy, always
* JSON encoder type
* Headers
* Copy labels formatter from promtail
* Implement snappy-proto encoding
* Create encoder interface, test both encoders, choose snappy-proto by default
* Make encoder configurable at the LokiCfg level
* Export both encoders
* Touch up comment and tests
* Drop unnecessary conversions after move to plain strings to appease linter
* Rename RecordStatesAsync to Record
* Rename QueryStates to Query
* Implement fanout writes
* Implement primary queries
* Simplify error joining
* Add test for query path
* Add tests for writes and error propagation
* Allow fanout backend to be configured
* Touch up log messages and config validation
* Consistent documentation for all backend structs
* Parse and normalize backend names more consistently against an enum
* Touch-ups to documentation
* Improve clarity around multi-record blocking
* Keep primary and secondaries more distinct
* Rename fanout backend to multiple backend
* Simplify config keys for multi backend mode
* Create historian metrics and dependency inject
* Record counter for total number of state transitions logged
* Track write failures
* Track current number of active write goroutines
* Record histogram of how long it takes to write history data
* Don't copy the registerer
* Adjust naming of write failures metric
* Introduce WritesTotal to complement WritesFailedTotal
* Measure TransitionsFailedTotal to complement TransitionsTotal
* Rename all to state_history
* Remove redundant Total suffix
* Increment totals all the time, not just on success
* Drop ActiveWriteGoroutines
* Drop PersistDuration in favor of WriteDuration
* Drop unused gauge
* Make writes and writesFailed per org
* Add metric indicating backend and a spot for future metadata
* Drop _batch_ from names and update help
* Add metric for bytes written
* Better pairing of total + failure metric updates
* Few tweaks to wording and naming
* Record info metric during composition
* Create fakeRequester and simple happy path test using it
* Blocking test for the full historian and test for happy path metrics
* Add tests for failure case metrics
* Smoke test for full annotation persistence
* Create test for metrics on annotation persistence, both happy and failing paths
* Address linter complaints
* More linter complaints
* Remove unnecessary whitespace
* Consistency improvements to help texts
* Update tests to match new descs
* Use existing row struct instead of [2]string, add deserialization helper
* Replace Stream struct with stream struct which is exactly the same
* Drop unused status field
* Don't export queryRes and queryData
* Tests for custom marshalling
* Rename row fields to T and V for consistency with prometheus samples
* Rename row to sample
* Alerting: implement loki query for alert state history
* extract selector building
* add unit tests for selector creation
* backup
* give selectors their own type
* build dataframe
* add some tests
* small changes after manual testing
* use struct client
* golint
* more golint
* Make RuleUID optional for Loki implementation
* Drop initial assumption that we only have one series
* Pare down to three columns, fix timestamp overflows, improve failure cases in loki responses
* Embed structred log lines in the dataframe as objects rather than json strings
* Include state history label filter
* Remove dead code
---------
Co-authored-by: Alex Weaver <weaver.alex.d@gmail.com>
* Extract label merge, add test file
* Extract error/NoData to first class fields, remove a layer from values
* Include dashUID and panelID as line-level fields
* Drop unnecessary object receiver
* Add tests for stream building
* Drop NoData field from log lines
Alexander Weaver
Dimitris Sotirakis
Jean-Philippe Quéméner