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CHANGELOG.md

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6.1.0

  • Add new flag --statser-type to make internal metric destination configurable. Defaults to internal, also supports logging and null

6.0.1

  • Fixes rate limiter on bad lines. A value <= 0 will disable entirely.

6.0.0

  • Parses histogram metrics as timers
  • Log bad lines with rate limit
  • Add new flag --bad-lines-per-minute, controls the rate limit on logging lines which fail to parse. Defaults to 0. Supports floats.

5.4.1

  • Memory/GC optimisation with buffers being reused in the Datadog backend
  • Metrics in the cloud provider cache should now be correct

5.4.0

  • BREAKING: The way "per second" rates are calculated has changed from "value / configured flush interval" to "value / actual flush interval".

5.3.0

  • Uses the default EC2 credentials
  • Timer sub-metrics now have a configuration option for opt-out. See README.md for details.

5.2.2

  • Build -race on ubuntu:16.04 instead of 16.10

5.2.1

  • Performance work, round 3

5.2.0

  • Performance work, round 2
  • Add new flag --estimated-tags, pre-allocates the Tags array. Defaults to 4.

5.1.1

  • Fix index out of range error and tag corruption in AWS CP

5.1.0

  • Performance work

5.0.0

  • More metrics rework. Internal metrics are now in-phase with flushing.
  • Better distribution of metrics between aggregators when received from multiple hosts.
  • New Datadog option: max_requests, the maximum number of metric http requests that can be made by the Datadog backend.
  • BREAKING: Additional and renamed metrics in the flusher, see METRICS.md
  • BREAKING: Heartbeat changes:
    • --heartbeat-interval changed to --heartbeat-enabled.
    • Heartbeat is in-phase with the flush.
    • Heartbeat sends a value of 1, so a sum aggregation can be applied.

4.1.1

  • New internal metrics around the cloud provider cache and AWS cloud provider, see METRICS.md for details.

4.1.0

  • Add new flag --conn-per-reader adding support for a separate connection per reader (requires system support for reusing addresses)
  • Refactor MetricDispatcher into BackendHandler satisfying separate MetricHandler and EventHandler interfaces
  • Add TagHandler for static tags

4.0.0

  • BREAKING: Independent scaling of datagram reading and parsing
    • Separate MetricReceiver into DatagramReceiver and DatagramParser
    • Allow independent scaling of parser workers with new flag --max-parsers. Defaults to number of CPU cores.
    • Change default of --max-readers flag to min(8, number of CPU cores)

3.1.1

  • GC optimization with buffer reuse

3.1.0

  • New docker image suffix, version-syms, includes symbol table
  • New flag --receive-batch-size to set datagram batch size. Defaults 50.
  • Batch reading should improve performance by using recvmmsg(2). This has additional memory considerations documented in README.md, and can tuned by tracking the avg_packets_in_batch metric and adjusting as necessary.

3.0.1

  • New flag --heartbeat-interval sends heartbeat metrics on an interval, tagged by version and commit. Defaults 0. Set to 0 to disable.

3.0.0

  • BREAKING: use space instead of comma to specify multiple values for the following parameters: backends, percent-threshold, default-tags and internal-tags.
  • BREAKING: Removed Datadog dual_stack option in favor of explicit network selection.
  • New Datadog option: network allows control of the network protocol used, typical values are tcp, tcp4, or tcp6. Defaults tcp. See Dial for further information.

2.4.2

  • New Datadog option: dual_stack allows control of RFC-6555 "Happy Eyeballs" for IPv6 control. Defaults false.

2.4.1

  • No functional changes over previous version. Release tag to trigger build process.

2.4.0

  • Build with Go 1.9
  • Add support for compression in Datadog payload.
  • New Datadog option: compress_payload allows compression of Datadog payload. Defaults true.
  • Add staged shutdown
  • Update logrus import path

2.3.0

  • New flag --internal-tags configures tags on internal metrics (default none)
  • New flag --internal-namespace configures namespace on internal metrics (default "statsd")
  • BREAKING: Significant internal metric changes, including new names. See METRICS.md for details

2.2.0

  • New flag --ignore-host prevents capturing of source IP address. Hostname can be provided by client via a host: tag.

2.1.0

  • Handle EC2 InvalidInstanceID.NotFound error gracefully
  • Build with Go 1.8
  • Make cloud handler cache configurable
  • Batch AWS Describe Instances call
  • Fix a deadlock in Cloud Handler
  • Minor internals refactoring

2.0.1

  • Do not log an error if source instance was not found

2.0.0

  • BREAKING: Renamed aws.http_timeout into aws.client_timeout for consistency
  • BREAKING: Renamed datadog.timeout into datadog.client_timeout for consistency
  • Tweaked some timeouts on HTTP clients

1.0.0

  • BREAKING: Renamed parameter maxCloudRequests into max-cloud-requests for consistency
  • BREAKING: Renamed parameter burstCloudRequests into burst-cloud-requests for consistency
  • Fix a bunch of linting issues
  • Run tests concurrently
  • Configure various timeouts on HTTP clients
  • Update dependencies
  • Big internals refactoring and cleanup

0.15.1

  • Fix bug in Graphite backend introduced in 0.15.0 (#75)

0.15.0

  • Fix bug where max queue size parameter was not applied properly
  • Use context in more places
  • Stricter TLS configuration
  • Support TCP transport and write timeouts in statsd backend
  • Reuse UDP/TCP sockets to reduce number of DNS lookups in statsd and graphite backends
  • Reuse memory buffers in more cases
  • Update dependencies

0.14.11

  • Go 1.7
  • Config option to disable sending tags to statsdaemon backend

0.14.10

  • Fix NPE if cloud provider is not specified
  • Minor internal cleanups

0.14.9

  • Some additional tweaks to flushing code
  • Minor refactorings

0.14.8

  • Fix bug in rate calculation for Datadog

0.14.7

  • Fix bug introduced in 0.14.6 in Datadog backend when invalid hostname was sent for metrics
  • Set tags for own metrics (#55)
  • Add expvar support
  • Minor internals refactoring and optimization

0.14.6

  • Limit max concurrent events (#24)
  • Memory consumption optimizations

0.14.5

  • Improved and reworked tags support; Unicode characters are preserved now.
  • Minor internals refactoring and optimization

0.14.4

  • Send start and stop events (#21)
  • Linux binary is now built inside of Docker container rather than on the host

0.14.3

  • Fix data race in Datadog backend (#44)
  • Minor internals refactoring

0.14.2

  • Fix batching support in Datadog backend

0.14.1

  • Better Graphite support (#35)
  • Minor internals refactoring

0.14.0

  • Update to Alpine 3.4
  • Cap request size in Datadog backend (#27)
  • Set timeouts on Dials and tcp sends (#23)
  • Reuse HTTP connections in Datadog backend

0.13.4

  • Async rate limited cloud provider lookups (#22, #3)
  • Internals refactoring

0.13.3

  • Add configurable CPU profiler endpoint

0.13.2

  • Increase default Datadog timeouts to reduce number of errors in the logs

0.13.1

  • Log intermediate errors in Datadog backend
  • Consistently set timeouts for AWS SDK service clients
  • Update all dependencies
  • Fix Datadog backend retry error #18
  • Various internal improvements

0.13.0

  • Fix goroutine start bug in dispatcher - versions 0.12.6, 0.12.7 do not work properly
  • Datadog events support

0.12.7

  • Remove deprecated -f flag passed to Docker tag command
  • Rename num_stats back to numStats to be compatible with original statsd

0.12.6

  • null backend to do benchmarking
  • Internals refactoring

0.12.5

  • Implement negative lookup cache (#8)
  • Read configuration from environment, flags and config

0.12.4

  • Do not multiply number of metric workers

0.12.3

  • Do not replace dash and underscore in metric names and tags

0.12.2

  • Fix handling of NaN specific case
  • Minor refactorings for linter

0.12.1

  • Use pointer to metric instead of passing by value
  • Optimise (5-10x) performance of line parser

0.12.0

  • Revert dropping message and block instead
  • Use different values for number of worker to read from socket, process messages and metrics
  • Minor fixes and performance improvements
  • Calculate per second counters since last flush time instead of interval

0.11.2

  • Process internal stats as standard metrics
  • Add benchmarks
  • Improve performance for buffering data out of the socket
  • Drop messages and metrics instead of blocking when overloaded

0.11.1

  • Normalize tags consistently but don't force lower case for metric names

0.11.0

  • Add support for cloud plugins to retrieve host information e.g. instance id, aws tags, etc.

0.10.4

  • Add load testing tool

0.10.3

  • Performance improvements for receiver and aggregator

0.10.2

  • Use goroutines to read net.PacketConn instead of buffered channel

0.10.1

  • Graphite: replace dots by underscores in metric name (tags)
  • Limit concurrency by using buffered channels for incoming messages
  • Discard empty tags
  • Datadog: add retries on post errors

0.10.0

  • Add support for default tags

0.9.1

  • statsd backend: ensure not going over the udp datagram max size on metrics send
  • Datadog: normalise tags to always be of form "key:value"

0.9.0

  • Reset counters, gauges, timers, etc. after an expiration delay
  • Datadog: add interval to metric payload
  • Datadog: use source ip address as hostname

0.8.5

  • Remove extraneous dot in metric names for stdout and graphite backends when no tag
  • Add more and improve internal statsd stats

0.8.4

  • Datadog: set dogstatsd version and user-agent headers
  • Datadog: use rate type for per second metric

0.8.3

  • Fix issue with tags overwriting metrics without tags

0.8.2

  • Fix undesired overwriting of metrics

0.8.1

  • Datadog: rollback change to metric names for preserving backward compatibility

0.8.0

  • Add more timers aggregations e.g. mean, standard deviation, etc.

0.7.1

  • Improve graphite backend reliability by re-opening connection on each metrics send
  • Fix value of metrics displayed in web UI
  • Improve web console UI look'n'feel

0.7.0

  • Add statsd backend

0.6.0

  • Add support for global metrics namespace
  • Datadog: remove api url from config

0.5.0

  • Add support for "Set" metric type

0.4.2

  • Datadog: send number of metrics received
  • Use appropriate log level for errors

0.4.1

  • Remove logging the url on each flush in datadog backend
  • Use alpine base image for docker instead of scratch to avoid ca certs root error

0.4.0

  • Add datadog backend

0.3.1

  • Fix reset of metrics

0.3.0

  • Implement tags handling: use tags in metric names

0.2.0

  • Implement support for pluggable backends
  • Add basic stdout backend
  • Configure backends via toml, yaml or json configuration files
  • Add support for tags and sample rate

0.1.0

  • Initial release