CHANGES.md

Changes

[Fix] - bugfix

[Breaking] - breaking change

[Feature] - new feature

[Improvement] - non-breaking improvement

[Code] - code quality related change that shouldn't make any significant difference for end-user

[Config] - related to config options or default parameters

[Build] - only related to ways how someone can build application

CHANGELOG

0.16.0.1

• [Build] Fix automation that builds docker images
• [Build] Add rockylinux-9 packages (RHEL 9)
• [Build] Update build version of golang to 1.19.4

0.16.0

• [Improvement] Deprecate and remove carbonzipper binary (thx to @msaf1980)
• [Improvement] Remove deprecated carbonsearch support
• [Improvement] Refactor HTTP client (used to talk to databases) to properly do keepAlive and respect specified amount of connections
• [Improvement] HTTP client should now support mTLS checking
• [Improvement] Listeners now support TLS (including mTLS)
• [Improvement] Update all vendored libraries to their latest stable version
• [Code] fix various panics in tags and use copy tags to avoid mutating input (thx to @npazosmendez)
• [Feature] Port join function from Avito carbonapi fork (https://github.com/el-yurchito/carbonapi/commit/bccdb90a90492314c18696eb4f064b818c5fff70 and https://github.com/el-yurchito/carbonapi/commit/47177771d60b7af0f5ac865634ecf3d1c3aa2802)
• [Feature] Implement exp() function (thx to @carrieedwards)
• [Feature] Implement logit() function (thx to @carrieedwards)
• [Feature] Implement unique() function (thx to @carrieedwards)
• [Feature] Implement sinFunction() function (thx to @carrieedwards)
• [Feature] Implement legendValue() function (thx to @carrieedwards)
• [Feature] Implement aggregateWithWildcards() function (thx to @carrieedwards)
• [Feature] Implement powSeries() function (thx to @leizor)
• [Feature] Implement averageOutsidePercentile() function (thx to @carrieedwards)
• [Feature] Implement sigmoid() function (thx to @carrieedwards)
• [Feature] Support for xFilesFactor and setXFilesFactor (thx to @carrieedwards)
• [Feature] Implement removeBetweenPercentile() function (thx to @carrieedwards)
• [Feature] Implement identity() function (thx to @carrieedwards)
• [Feature] Implement minMax() function (thx to @carrieedwards)
• [Feature] Implement aggregateSeriesLists() function (thx to @leizor)
• [Feature] Implement movingWindow() function (thx to @carrieedwards)
• [Feature] Implement exponentialMovingAverage() function (thx to @carrieedwards)
• [Feature] Implement verticalLine() function (thx to @leizor)
• [Feature] Implement toLowerCase() function (thx to @carrieedwards)
• [Feature] Implement toUpperCase() function (thx to @carrieedwards)
• [Feature] Implement sumSeriesLists() function (thx to @carrieedwards)
• [Feature] Implement compressPeriodicGaps() function (thx to @carrieedwards)
• [Feature] Implement holtWintersConfidenceArea() function (thx to @carrieedwards)
• [Fix] Numerous compatibility fixes for functions, mostly for graphite-web compatibility (thx to @carrieedwards and @npazosmendez, @msaf1980)
• [Fix] Refactor scaling and re-aligning series (thx to @msaf1980)
• [Fix] Fix logic that extracts names when metric name contains non-ascii characters (thx to @msaf1980)
• [Fix] Parser now accepts escaped characters
• [Fix] IronDB adjuststep logic now works properly
• [Fix] Fix tag extractions in seriesByTag (thx to @msaf1980)
• [Fix] Fix tag handling in nested functions (thx to @carrieedwards)

0.15.6

• [Improvement] Significant improvement in sorting metrics from backends (thx to @Felixoid)
• [Fix] Get rid of bashism in postinst script (thx to @Glandos)

0.15.5

• [Security] Update vendored dependency for GoGo Proto that should fix improper index validation (CVE-2021-3121)
• [Feature] carbonapi supports -check-config flag just to run config validation (thx to @msaf1980)
• [Feature] 2-level cache lifetime support (see docs for more information) (thx to @msaf1980)
• [Feature] Support IronDB backend (thx to @deniszh)
• [Improvement] Debug logs should now log a bit more information about metrics
• [Improvement] Better performance for metrics/find on relatively new VictoriaMetrics (thx to @iklfst)
• [Improvement] Add support for Cluster Tenant ID for VictoriaMetrics backend (thx to @iklfst)
• [Fix] asPercent handles empty values correctly (thx to @msaf1980)
• [Fix] Cairo functions supports context passing now (thx to @faceair)
• [Fix] Handling multi-fetch request parameters for VictoriaMetrics backend respects start & stop Time as well as step for every metric (thx to @alexey-mylnkov)
• [Fix] Fix a bug in removeEmptySeries
• [Fix] Properly pass step to VictoriaMetrics (thx to @tantra35)
• [Fix] Fix substr function to behave in a way like graphite-web
• [Fix] timeShift properly hanldes resetEnd parameter (thx to @msaf1980)
• [Fix] Fix moving* to work properly when step is greater than window size (thx to @jonasbleyl)
• [Fix] Pass request UUID as header (thx to @msaf1980)
• [Fix] groupByNode(s) supports negative node indecies (thx to @Felixoid)

0.15.4

• [Fix] zipper requests net error (encapsulated) (thx to @msaf1980)
• [Fix] preserve original points for some functions (thx to @msaf1980)
• [Fix] aliasByNode: strip function in name (thx to @msaf1980)
• [Improvement] build: allow to replace fpm with cli-compability program (thx to @msaf1980)
• [Improvement] build: equal version for carbonapi/carbonzipper package (thx to @msaf1980)

0.15.3

• [Fix] Time parsing is now closer to how graphite do it
• [Fix] Aggregation functions now scale input to common step (thx to @Felixoid)
• [Fix] Fix the way how partialy retrived requests that had globs were handled
• [Fix] Fix resolver to accept 0.0.0.0 and [::] as valid addresses for listeners
• [Fix] Handling of unicode characters when common table is added.
• [Fix] AlignVluaes in Prometheus and VictoriaMetrics backends shouldn't drop last value (thx to @limpasha)
• [Fix] maxDataPoints should be passed to Prometheus and VictoriaMetrics\
• [Fix] Various packaging problems (e.x. logrotate) (thx to @deniszh)
• [Improvement] xFilesFactor support in SUmmarizeValues
• [Improvement] Port functions that were implemented in avito's fork of carbonapi (aliasByHash, lowestMin, highestMin, integralWithReset and much more): https://github.com/go-graphite/carbonapi/commit/322dae560e1f4c79aa4b410cf3701c9c677c386b for the diff for COMPATIBILITY.md file
• [Improvement] Refactor error handling (thx to @msaf1980)
• [Improvement] Default systemd unit should drop privileges (thx to @deniszh)
• [Improvement] Enable cairo support for docker images (thx to @deniszh)

0.15.2

• [Fix] Honor isLeaf attribute in replies (makes possible to have metric called "metric.foo" and metric called "metric.foo.bar" and see both in find queries (thx to @tantra35)
• [Fix] Fix bootstrapInterval paramter handling in holtWinters functions
• [Fix] Fix potential panics when metirc do not have required amount of data for holtWinters functions
• [Fix] Fix panics with several functions if they are applied before alias function (mostly holtWinter functions)

0.15.1

• [Fix] Fix back compatibility for default listen on localhost:8081 (thx to @Felixoid)

0.15.0

• [Breaking] - cache (including memcache) now uses sha256 for a hash function for keys. This might break existing setup
• [Breaking] - new config variable slowLogThreshold under upstreams section controls what request time would be required for request to be logged in slow logger.
• [Breaking] - remove semi-broken support for graceful restarts (See #552)
• [Fix] Fix parsing tags from backend replies (adds support of = in tag values, make them more compatible with graphite-web)
• [Fix] Fix how request splitting worked for maxBatchSize != 0 (thx to @tantra35)
• [Improvement] Bad requests will return error 400 instead of 500 (thx to @Felixoid)
• [Improvement] VictoriaMetrics >= 1.53.1 backend should work a bit faster for find queries
• [Improvement] Do not apply tag-deduplication for VictoriaMetrics >= 1.50.0 (less memory consumption, faster queries)
• [Improvement] Use VictoriaMetrics's graphite-compatibe API to query for tags (less memory consumption, faster queres)
• [Feature] Support add function (thx to @Felixoid)
• [Feature] removeEmptySeries supports xFilesFactor parameter (thx to @faceair)
• [Feature] Allow to specify multiple listen addresses
• [Feature] Optional caching DNS resolver

0.14.2.1

• [Fix] Fix test for timeShift function. This doesn't affect the way how carbonapi works, just makes CI happy

0.14.2

• [Feature] Separate backend protocol for VictoriaMetrics. Based on prometheus protocol (and share some of it's code), but uses some of VM-specific features to improve performance for /metrics/find queries (Related to #521)
• [Feature] timeShift function supports resetEnd parameter (thx to @faceair). Current default is set to false to match carbonapi behavior, however in 0.15.0 it will be changed to true.
• [Feature] Resepct pixelRatio parameter from referer if not specified in request. (thx to @lomik)
• [Fix] Handling of maxBatchSize (maxGlobs) in config file. Respect overrides on backend level.
• [Fix] Warnings about duplicate functions when carbonapi starts.
• [Fix] Resulting tags in groupByTags are now correct (thx to @Felixoid)
• [Fix] Fix handling of requests that fetches data with different start/end times (thx to @Felixoid). Related to #526
• [Fix] Fix the way how pow function works with NaN in values (thx to @zhelyabuzhsky)
• [Fix] CSV format now produce dates in UTC (like in graphite-web) (thx to @jonasbleyl)
• [Fix] Fix from/util timestamp aligning in all moving* functions (thx to @Felixoid)

0.14.1

• [Feature] Implement doMultipleRequestsIfSplit config option which could be useful for go-carbon and huge requests (See #509)
• [Improvement] Return stacktrace on panic (thx to @Felixoid)
• [Fix] Fix case where some metrics passed to functions like group or sumSeries were missing. Fixes #438
• [Fix] Accept 1 and 0 as bool arguments for True and False. (thx to @Felixoid)
• [Fix] Align precision of multiple metrics (thx to @Felixoid, see #500 and #501)
• [Fix] fallbackSeries now works properly (thx to @Egor Redozubov)
• [Fix] Panic when trying to render png/svg of an empty response (Fixes #503)
• [Fix] Fix Error 500 when sendGlobsAsIs is false (Fixes #506)
• [Fix] prometheus backend: carbonapi should send 'end' instead of 'stop' in queries (thx to Alexandre Vincent)
• [Fix] change metrics resulting tags to match graphite-web in some cases (thx to @Felixoid)
• [Fix] Prometheus backend: trust timestamps from the backend (Fixes #504, Fixes #514)
• [Fix] percentileOfSeries: return first of filtered datapoints in case only one series have valid data (Fixes #516)
• [Code] merge aliasByNode and aliasByTags (thx to @Felixoid)

0.14.0

• [Breaking][Code] expr library and all functions now requires caller to pass context. See #485
• [Breaking][Config] for protocol auto there is now no default implied concurrency limit of 100 as it was before.
• [Breaking][Config] Changed default value for notFoundStatusCode to 200 to match graphite-web behavior
• [Feature] Add a backendCache option that implements dedicated cache for backend responses. See #480 (thx to @jaroslawr)
• [Feature] For Prometheus backend it is now possible to specify max_points_per_query
• [Feature] weightedAverage function (thx to @Felixoid)
• [Improvement] carbonapi now pass maxDataPoints to backends that support carbonapi_v3_pb format. Previously 0 was passed.
• [Fix] metric find requests to backend now pass start and end time (thx to @faceair)
• [Fix] Fix 404 status code if backend have errors (thx to @lexx-bright)
• [Fix] Fix sorting in *seriesLists functions (thx to Egor Redozubov)
• [Fix] Potential panic during groupByNode evaluation if callback is invalid expression
• [Fix] Partially overlapping backend groups caused some queries to return empty result
• [Fix] Sorting metrics should work now in the same way as in graphite-web (thx to @Felixoid)
• [Fix] Time of the first timestamp was wrong if multiplySeries was applied (it matched request from)

0.13.0

• [Fix] smartSummarize now supports wildcards in the metric names (thx to @Peter-Sh)
• [Fix] json format correctly distinguishes between +-inf and nan (thx to @faceair)
• [Fix] prometheus backend: fix a bunch of problems related to globs and regex escaping (thx to @rodio)

0.13.0.rc.3

• [Fix] Proper fix for prometheus backend and non-taged render requests with groupByNodes function
• [Fix] Align timestamps in prometheus backend (thx to @rodio, #467)

0.13.0-rc.2

• [Fix] Prometheus backend wasn't working correctly for non-taged render requests (#465, thx to @menai34 for proposed fix)
• [Fix] Fix panic when using prometheus tagged response for non-tagged queries in groupByTags function (and maybe more)
• [Fix] Add proper aliases for aggregate functions - that would make groupByTags properly usable with functions like diff and total.

0.13.0-rc.1

• [Improvement] Redesign error handling and logging. Logging should be now less noisy and all error messages should contain better reasoning about error cause
• [Improvement] Move some of the logging messages to Debug level - that should make logs less noisy and still preserve ability to see detailed errors on Debug level
• [Improvement] Add a config parameter to disable tldCache (useful for clickhouse-based backends)
• [Improvement] Implement noNullPoints query parameter. Works only with JSON as in graphite-web
• [Improvement] For all SeriesLists functions, allow to specify default argument (thx to kolobaev@)
• [Improvement] Add support for round function (thx to kolobaev@)
• [Improvement] Add integralByInterval function (thx to faceair@)
• [Improvement] Add sortBy function (thx to misiek08@)
• [Improvement] Add smartSummarize function (thx to misiek08@)
• [Fix] /render and /metrics/find URLs now works correctly for format=carbonapi_v2_pb (protov3) and for new format (carbonapi as a carbonapi's backend)
• [Fix] Allow '%' in metric names
• [Fix] zipper metrics now exported again
• [Fix] applyByNode - fix various incompatibilities with graphite-web (node starts with 1, some rewrite related issues, etc) (thx to faceair@)
• [Fix] Honor SendGlobAsIs and AlwaysSendGlobAsIs (important for pre-0.12 configs)
• [Fix] Fix panic in some cases when one of the metrics is missing
• [Fix] Compatbility fixes to useAboveSeries (now it's behavior matches graphite-web's)
• [Fix] Fix seriesList functions in case of unsorted responses (*seriesList sorts denomniators and numerators first of all)
• [Fix] Fix pprof endpoint routing (thx to faceair@)
• [Fix] Various fixes around error handling (thx to faceair@)
• [Fix] Avoid multiple requests for time moving based functions (thx to faceair@)
• [Code] Make linters much more happier about the code (thx to faceair@ for contribution)
• [Breaking] [Code] Comment out support for gRPC backend type. It was never properly tested and likely need complete rework before it will be usable
• [Breaking] [Build] Minimum Supported golang version is 1.13.0

0.12.6

• [Fix] Fix aliasByTags to work correclty with other functions
• [Fix] panic when using protov2 and backend that doesn't support tags (thx to @gekmihesg)

0.12.5

• [Feature] Implement 'highest' function
• [Feature] Implement 'lowest' function
• [Feature] Implement 'aggregateLine' function
• [Feature] Implement 'filterSeries' function

0.12.4

• [Feature] Function Defines - allows to do custom metric aliases (thx to @lomik). See doc/configuration.md for config format
• [Improvement] New config options that allows to prefix all URLs and to enable /debug/vars on a separate address:port. See docs/configuration.md for more information
• [Improvement] /render queries now returns tags in json (as graphite-web do)
• [Improvement] groupByTags should now support all available aggregation functions (#410)
• [Fix] Fix panic when using carbonapi_proto_v3 and doing tag-related queries (#407)
• [Fix] Add missing alias for averageSeries (thx to @msaf1980)

0.12.3

• [Fix] Fix graphiteWeb proxy function (thx. to @sylvain-beugin)
• [Fix] Prometheus Backend: correctly handle groups, fixes #405
• [Fix] Prometheus Backend: convert target that doesn't contain seriesByTags in a same way that's used for /metrics/find
• [Fix] change behavior of aliasSub to match graphite-web (fixes #290)
• [Improvement] Prometheus backend: Allow to specify "start" parameter (via backendOptions)

0.12.2

• [Fix] Fix stacked cairo-based graphs (doesn't affect json or grafana rendering)
• [Fix] Correctly deduplicate requests for cases where same metric fetched in the same expression and cache is disabled. Fixes #401
• [Fix] Make all zipper's errors non-fatal (carbonapi will try to fetch construct full response no matter what error it was)
• [Fix] Make zipper less noisy

0.12.1

• [Improvement] Port 'minValue' parameter handling for nonNegativeDerivative and perSecond: https://github.com/bookingcom/carbonapi/commit/5bfda0d24 and https://github.com/bookingcom/carbonapi/commit/790c05d8
• [Improvement] Config option "headersToPass" to control what request headers will be passed to backend (default: none). Fixes #398
• [Improvement] Config option "headersToLog" to control what request headers will be logged by carbonapi (default: none).
• [Fix] Cherry-pick https://github.com/bookingcom/carbonapi/commit/946ca8b (fixes small png render issues)
• [Fix] #260 - parsing of bool values as Names.
• [Fix] Fix limiter waiting for a wrong server in some cases
• [Code] Cherry-pick https://github.com/bookingcom/carbonapi/pull/172/commits/9f0b3f611 to simplify tests (author: @gksinghjsr)

0.12.0

• Add support for Prometheus as Backend. This allows to use Prometheus-compatible software as carbonapi's backends (e.x. Prometheus and VictoriaMetrics)
• Add support for querying msgpack-compatible backends. This should make carbonapi compatible with graphite-web 1.1 and grafana/metrictank
• [Breaking][Code] Migrate all internal structures to github.com/go-graphite/protocol/carbonapi_v3_pb. This removes redundant IsAbsent slice and changes all timestamps to int64 (they are still expected to have uint32 timestamps there)
• [Breaking][Improvement] Integrate carbonzipper 1.0.0. This introduces better loadbalancing support, but significantly changes config file format. It might behave differently with the same settings. It also removes carbonzipper dependency.
• [Improvement] seriesByTag Support (thx. to Vladimir Kolobaev)
• [Improvement] aliasByTag Support (thx. to Vladimir Kolobaev)
• [Improvement] Added support for more aggregation functions (thx. to Oleg Matrokhin)
• [Improvement] Add 'aggregate' function.
• [Improvement] pixelRatio for png render (thx. to Roman Lomonosov)
• [Fix] Supported functions were updated to be more compatible with graphtie-web 1.1.0+
• [Fix] fix movingXyz error on intervals greater than 30 days (thx. to Safronov Michail)
• [Fix] Fix timeShift function (thx. to Gunnar Þór Magnússon)

0.12.0-rc.1

• Fix panic when using Prometheus backend and query /tags/autoComplete/tags without parameters
• Fix long going issue with stuck requests towards backend.

0.12.0-rc.0

• Add experimental support for Prometheus as Backend.
• Add experimental support for querying msgpack-compatible backends. This should make carbonapi compatible with graphite-web 1.1 and grafana/metrictank
• [Breaking][Code] Migrate all internal structures to github.com/go-graphite/protocol/carbonapi_v3_pb. This removes redundant IsAbsent slice and changes all timestamps to int64 (they are still expected to have uint32 timestamps there)
• [Breaking][Improvement] Migrate to carbonzipper 1.0.0. This introduces better loadbalancing support, but significantly changes config file format. It might behave differently with the same settings.
• seriesByTag Support (thx. to Vladimir Kolobaev)
• aliasByTag Support (thx. to Vladimir Kolobaev)
• Supported functions were updated to be more compatible with graphite-web 1.1.0+
• Added support for more aggregation functions (thx. to Oleg Matrokhin)

0.11.0

• [Breaking][Fix] Allow to specify prefix for environment variables through -envprefix command line parameter. Default now is "CARBONAPI_" which might break some environments
• [Improvement] graphiteWeb function that implements force-fallback to graphiteWeb
• [Improvement] graphiteWeb can query graphite-web 1.1.0+ for a list of supported functions and automatically do fallback to graphite in case user calls unimplemented function
• [Improvement] New config switch to disable find request before render. This is helpful for graphite-clickhouse backends
• [Fix] Fix typo in polyfit function description
• [Fix] Skip metrics without pairs in reduceSeries (thx. to @errx)
• [Fix] Fix config file parsing (thx. to @errx)
• [Code] Move MakeResponse to expr/types and rename it to MakeMetricData. This is sometimes useful outside of tests. Thx. to @borovskyav
• [Code] Add helper package that will ease doing per-function tests. See expr/functions/absolute/function_test.go for an example

0.10.0.1

• [Fix] Autobuild scripts. Version bump to avoid retagging.

0.10.0

• [Fix] lineWidth param is not working
• [Fix] Support & in metric name
• [Fix] default colors for png and svg are now defined as in graphite-web in 1.1.0, but add example of how to set them to new colors
• [Improvement] You can override default colors through config
• [Improvement] It's now possible to specify 'template=' option to png or svg renders. It will use templates that's specified by 'graphTemplates' option in config. Template config format is not compatible with graphite-web though and uses either toml or yaml. Options naming is also different and follows URL override style.
• [Code] Minor API changes in expr/png: MarshalPNGRequest and MarshalSVGRequest now requires to specify template.

0.9.2

• [Improvement] "pipe" function chaining syntax. Same way as in graphite-project/graphite-web#2042 (thx. to @lomik)

0.9.1

• [Code] Refactor expr. Split it into pkg/parser. Simplify tests.
• [Code] Refactor expr. Split functions into directories.
• [Code] Simple docs about how to add a new function.
• [Fix] All aggregating functions (e.x. summarize) now adds math.NaN() to begin and end of value list to make them same size.
• [Fix] Experimental option ExtrapolateExperiment that allows aggregating functions to extrapolate data. Function is not tested properly yet and might be buggy, disabled by default
• [Improvement] API to get list of functions (graphite-web 1.1 compatibility)
• [Improvement] Add 'first' and 'last' as consolidateBy options

0.9.0

• [Improvement] Merge carbonzipper into carbonapi. Please migrate to new 'upstreams' in the config file.
• [Improvement] Make default cache timeout configurable.
• [Improvement] Add divideSeriesLists (thx. to Oleg Matrokhin)
• [Improvement] Add groupByNodes (thx to @errx)
• [Improvement] Add cumulative(thx to Oleg Matrokhin)
• [Improvement] Add diffSeriesLists and multiplySeriesLists functions (works the same way as divideSeriesLists vs divideSeries)
• [Improvement] Add linearRegression function (thx. to Oleg Matrokhin)
• [Improvement] Allow applyByNode to generate new targets
• [Improvement] Allow diffSeries to substract series with different Steps
• [Improvement] Make cache timeouts configurable
• [Improvement] Make batch size configurable for sendGlobAsIs
• [Improvement] Export GoVersion through expvars
• [Improvement] Allow overriding config variables through ENV
• [Improvement] Allow to use .toml in addition to .yaml as config file (determined by extension)
• [Improvement] Add fallbackSeries (thx to @gksinghjsr)
• [Improvement] Implement areaMode in cairo rendering (thx. to @ibuclaw)
• [Improvement] Implement lineWidth, rightWidth, leftWidth (for cairo rendering) (thx. to @ibuclaw)
• [Improvement] Add Unicode support for series names (thx. to @korservick)
• [Improvement] Add multiplySeriesWithWildcards (thx. to @kamaev)
• [Improvement] Add stddevSeries (thx. to @kamaev)
• [Improvement] Add mapSeries (thx. to @kipwoker)
• [Improvement] Add reduceSeries (thx. to @kipwoker)
• [Improvement] Add delay() function (thx. to @kipwoker)
• [Improvement] Update asPercent to graphite-web 1.1 (thx. to @kipwoker)
• [Fix] Fix rounding errors when generating yLables for Cairo-based renders (thx. to @ibuclaw)
• [Fix] Fix integer overflow when building for 32bit systems
• [Fix] Don't set path in treejson if '.' not found in name (thx. to @ibuclaw)
• [Fix] Fix derivative() if first arg is missing (thx. to Oleg Matrokhin)
• [Fix] Fix calculation of yTop when using log base (thx. to @ibuclaw)
• [Fix] Fix asPercent() to handle multiple series (thx. to @ibuclaw)
• [Fix] Swap red and darkred colors (thx to @ibuclaw)
• [Fix] Make asPercent graphite-compatible #213
• [Fix] Fix summarize for cases when bucketSize < stepTime
• [Fix] Fixed #90 - carbonapi shouldn't fail if one of the series doesn't exist
• [Fix] Make PNG rendering looks like graphite-web (thx. to @lomik)
• [Fix] Don't fail if argument is empty series (graphite-web compatibility, thx. to @gksinghjsr)
• [Fix] Fix group() function #225 (thx. to @gksinghjsr)
• [Code] Small refactor of PictureParams structs. Makes GetPictureParams and DefaultColorList public.

0.8.0

• [Breaking] Most of the configuration options moved to a config file
• [Breaking] Logging migrated to zap (structured logging). Log format changed significantly. Old command line options removed. Please consult carbonapi.example.yaml for a new config options and explanations
• [Improvement] CarbonAPI now passes extra headers to keep track of requests
• [Improvement] Allow '^' and '$' as name characters. Required for carbonsearch text-match pattern anchoring
• [Improvement] Allow to bind to arbitrary IP:Port. (thx to @zdykstra, #194), Fixes #176
• [Improvement] Extend legendValues to append multiple values
• [Improvement] Add a switch to turn off propagating globbed requests to carbonzipper (was introduced in 0.7.0)
• [Improvement] Add {find,render}_cache_overhead_ns metrics that shows cache query overhead in nanoseconds
• [Improvement] Use dep as a vendoring tool
• [Improvement] Add a Makefile that will hide some magic from user.
• [Improvement] Send glob heruistic -- if request with globs is relatively small (<100 metrics) carbonapi will send it as is.
• [Improvement] divideSeries support seriesList in dividents (#203, thx @cldellow)
• [Improvement] added movingMin/movingMax/movingSum (#206, thx @cldellow)
• [Feature] Implement following functions from graphite-web: linewidth, areaBetween, applyByNode
• [Feature] Add fft, ifft, LowPass functions. See COMPATIBILITY.md for more information
• [Feature] Publish current configuration as an expvar (GET /debug/vars)
• [Feature] Make prefix configurable (thx to @StephenPCG, #189)
• [Fix] Fix issue with missing labels on graphs > 14d
• [Fix] Allow expressions to use 'total' instead of 'sum'. Required for graphite compatibility
• [Fix] Fix incompatibility between carbonapi and older versions of carbonzipper/carbonserver/go-carbon (protobuf2-only)

Notes on upgrading:

Even though there are several changes that's marked as breaking, it only breaks local config parsing and changes logging format.

This release fixes the incompatibility introduced in 0.6.0 and can work with both new and old versions of carbonserver, carbonzipper, go-carbon

0.7.0

• [Improvement] Render requests with globs now sent as-is.
• [Improvement] Added ProxyHeaders handler to get real client's ip address from X-Real-IP or X-Forwarded-For headers.
• [Improvement] Highest* and Lowest* now assumes '1' if no second argument was passed
• [Feature] Implement legendValue expression (see http://graphite.readthedocs.io/en/latest/functions.html#graphite.render.functions.legendValue for more information)

Notes on upgrading to 0.7.0:

It's highly recommended, if you use carbonzipper to also upgrade it to version 0.62

0.6.0

• [Breaking] Migrate to protobuf3

Notes on upgrading to 0.6.0:

You need to upgrade carbonzipper or go-carbon to the version that supports protobuf3

<=0.5.0 There is no dedicated changelog for older versions of carbonapi. Please see commit log for more information about what changed for each commit.