* Loki backend and client depend on a requester
* Instrument all requests to loki using weaveworks TimedClient
* Construct collector in metrics package
* 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
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Co-authored-by: Alex Weaver <weaver.alex.d@gmail.com>
* Define endpoint and generate
* Wire up and register endpoint
* Cleanup, define authorization
* Forgot the leading slash
* Wire up query and SignedInUser
* Wire up timerange query params
* Add todo for label queries
* Drop comment
* Update path to rules subtree
* 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
* Fix json serialization of state values
* Simplify two of the tests
* Fix linter complaint
* Don't return error if we fail to look up dashboard, just log it and move on
* Address linter complaint
* Copy rules instead of accepting pointer
* Deep-copy the rule, for even more guarantees
* Create struct just for needed fields
* Move RuleMeta to historian/model package, iron out package dependencies
* Move tests for dash ID parsing to model package along with code
* Implement push endpoint
* Drop duplicated struct
* Genericize auth/tenant headers and improve logging in error case
* Flesh out the data model
* Drop dead code
* Drop log line entirely
* Drop unused arg
* Rename a few type manipulation functions
* Extract label keys as constants
* Improve logs when loki responds with error
* Inline lokiRepresentation function
* Create loki client type and ping method
* Expose TestConnection on client
* Configure and ping Loki URL
* Close response body reader if present
* Add 30 second timeout
* Remove duplicate close
* Reduce piecemeal state fields
* Read data directly off state instead of rule
* Unify state and context into single struct
* Expose contextual information to layer above setNextState
* Work in terms of ContextualState and call historian in batches
* Call annotations service in batches
* Export format state and reason and remove workaround in unrelated test package
* Add new method to annotation service for batch inserting
* Fix loop variable aliasing bug caught by linter, didn't change behavior
* Incl timerange on annotation tests
* Insert one at a time if tags are present
* Point to rule from ContextualState rather than copy fields
* Build annotations and copy data prior to starting goroutine
* Rename to StateTransition
* Use new bulk-insert utility
* Remove rule from StateTransition and pass in directly to historian
* Simplify annotations logic since we have only one rule
* Fix logs and context, nilcheck, simplify method name
* Regenerate mock
* Touch up log statements, fix casing, add and normalize contexts
* Dedicated logger for dashboard resolver
* Avoid injecting logger to historian
* More minor log touch-ups
* Dedicated logger for state manager
* Use rule context in annotation creator
* Rename base logger and avoid redundant contextual loggers
* Create caching dashboard resolver
* A couple tests for dashboard resolving
* Log warning on not found
* Additional polish + review nits
* Move to singleflight instead of a plain mutex
* Store errors instead of -1 in cache and use reflection when reading
* Address linter error
* One more linter error
* Move annotation functionality behind a history persistence interface
* Rename to RecordState
* Fix lint error in import aliasing
* One more import linter error
