Merge pull request #288 from tsloughter/bump-rc3

bump version to 1.0.0-rc.3

Author: tsloughter

CHANGELOG.md

@@ -1,11 +1,45 @@
 # Changelog
 
-## Unreleased
+All notable changes to this project will be documented in this file.
 
-### API
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [API 1.0.0-rc.3] - 2021-10-12
+
+### Removed
+
+- Removed `opentelemetry:register_application_tracer`. Each application has a
+  Tracer registered for it automatically on boot. This can be disabled by
+  setting `opentelemetry` environment variable `register_loaded_applications` to
+  `false`.
+- Named Tracers registered with `opentelemetry:register_tracer` are now stored
+  separately from the mapping of Named Tracers created for each
+  application. Meaning if you have a module `mod_a` in application `app_a` with
+  application vsn `0.1.0` and also manually register a Tracer named `mod_a` with
+  version `1.1.1` then use of macros like `?with_span` will use the `app_a`
+  version `0.1.0` Named Tracer and manual use of a Named Tracer like:
+  
+  ```
+  Tracer = opentelemetry:get_tracer(mod_a),
+  otel_tracer:with_span(Tracer, span_name, #{}, fun() -> ... end),
+  ```
+  
+  will use Named Tracer `mod_a` with version `1.1.1`. In previous versions after
+  registering a Tracer named `mod_a` it would override the `mod_a` pointing to
+  the `app_a` Tracer.
+  
+  Additionally, manual registration of a Named Tracer with the name `app_a` will
+  not override the application registered Tracer of `app_a`.
 
 #### Context
 
+##### Added
+
+- B3 single header format support added
+
+##### Changed
+
 - Propagators must now be implementations of a propagator type's behaviour. At
   this time only the `otel_propagator_text_map` behaviour exists. Callbacks for
   inject and extract take an optional "set" and "get" function for working with
@@ -26,5 +60,16 @@
     {text_map_injectors, [trace_context, baggage]},
     {text_map_extractors, [b3multi, trace_context, baggage]}
     ```
+    
+##### Fixed
+
 - `b3` propagator renamed `b3multi` to properly convey it is the version of the
   B3 spec that creates multiple headers
+
+## [SDK - 1.0.0-rc.3] - 2021-10-12
+
+### Fixed
+
+- Memory leak fix: Non-recording Spans are no longer inserted into the ETS table tracking active span.
+- Ratio based root span sampling fixed, before it didn't take into account the
+  generated trace id.

apps/opentelemetry_api/VERSION

@@ -1 +1 @@
-1.0.0-rc.2
+1.0.0-rc.3