A new major release with incremental improvements and enhancements. Major features include support for AWS Lambda as a transport, and improved error handling in all transports. Thanks to the 26 contributors who contributed to this release! 🏌

Note that this release includes breaking changes in the metrics package, please review the documentation for changes.

Bug fixes

• sd/etcdv3: serve the keepalive response channel (#803) (thanks @fangdingjun)
• tracing/zipkin: swaps tested conditions (#812) (thanks @jcchavezs)
• metrics/influx: Fix InfluxDB import path (#826) (thanks @flowchartsman)
• kitgen: normalize backSlashes in path (#831) (thanks @obeyda)
• sd/etcdv3: fix dead loop (#848) (thanks @zii)
• sd/zk: fix: ProtectedEphemeralSequential in the wrong zk path (#849) (thanks @RedDragonet)
• metrics/cloudwatch2: fix context in Send() (#857) (thanks @h8liu)
• sd: fix data race (#865) (thanks @toffaletti)
• tracing/opentracing: fix port assignment (#866) (thanks @kevinreed8263)
• transport/nats: Update imports (#881) (thanks @wallyqs)
• metrics/prometheus: fix for latest HEAD (#885)
• metrics/dogstatsd: Drop metrics according to sample rate (#884) (thanks @martin-sucha)

Enhancements

• log: Support logrus.Field logger in the logrus adapter (#793) (thanks @sagikazarmark)
• transport/amqp: Add amqp.Delivery to the request func (#802) (thanks @ValeryPiashchynski)
• transport/http: adding request and response encoders for Protobuf (#809) (thanks @jprobinson)
• tracing/zipkin: add request sampler (#813) (thanks @jcchavezs)
• tracing/opentracing: Change span injection/extraction from HTTP request (#821) (thanks @nboukeffa)
• tracing/opentracing: Use opencensus' DefaultSampler instead of AlwaysSample as default (#830) (thanks @rueian)
• metrics: Make Send/Write Loop context aware (#837) (thanks @jlordiales)
• transport/awslambda: add support (#815) (thanks @suekto-andreas)
• transport/amqp: add NopResponse option (#850) (thanks @mattfung)
• log: add a log adapter for zap.Logger (#855) (thanks @MaruHyl)
• transport: Implement transport level error handlers (#863) (thanks @sagikazarmark)
• transport/nats: Use given context in NATS endpoint (#876) (thanks @nsmith5)
• metrics/cloudwatch2: Update cloudwatch2 to latest upstream API (#878) (thanks @nsmith5)

Documentation, examples, tests

• misc: fix a few misspellings (#797) (thanks @dvrkps)
• examples: Replace "x/net/context" import with "context" (#810) (thanks @marselester)
• metrics/prometheus: Fix test to accommodate new Prometheus metric output (#820)
• kitgen: fix kitgen test in the windows (#840) (thanks @runner)
• misc: add integration with builds.sr.ht (#842)
• log/level: improve examples (#845)
• misc: code improvements (#868) (thanks @sosiska)
• sd/{etcd,etcdv3}: disable flaky integration tests (#883)
• README: Update Gin framework homepage url (#888) (thanks @yellowmint)