v0.2.0

General

• The release contains significant changes as it is based on the latest
  .NET Tracer for Datadog APM
  with modifications to make it work with the
  Splunk OpenTelemetry Collector
  and directly with Splunk Observability Cloud.
  Some of the changes are breaking. Please contact us if you miss any feature
  from the previous release.

Breaking changes

• There is no support for .NET Framework older than .NET Framework 4.6.1.
• There is no support for Alpine Linux.
• There are no new releases for SignalFx.Tracing
  nor SignalFx.Tracing.OpenTracing
  NuGet packages. For manual instrumentation use OpenTracing
  instead. You can find more information in the documentation.
• Rename SIGNALFX_DOTNET_TRACER_CONFIG_FILE configuration to SIGNALFX_TRACE_CONFIG_FILE.
• Rename SIGNALFX_PROPAGATOR configuration to SIGNALFX_PROPAGATORS.
• Rename SIGNALFX_TRACING_ENABLED configuration to SIGNALFX_TRACE_ENABLED
• Rename SIGNALFX_ASPNET_TEMPLATE_NAMES_ENABLED configuration to SIGNALFX_TRACE_ROUTE_TEMPLATE_RESOURCE_NAMES_ENABLED.
• Remove SIGNALFX_ADD_CLIENT_IP_TO_SERVER_SPANS configuration.
  New, fixed behavior is equivalent to flag enabled.
• Remove SIGNALFX_SYNC_SEND configuration.
• Remove SIGNALFX_TRACE_DOMAIN_NEUTRAL_INSTRUMENTATION configuration.
• Remove SIGNALFX_APPEND_URL_PATH_TO_NAME configuration as it was against the
  OpenTelemetry Semantic conventions for HTTP spans.
  Take notice that the URL is available via http.url tag.
• Remove SIGNALFX_USE_WEBSERVER_RESOURCE_AS_OPERATION_NAME configuration.
  New, fixed behavior is equivalent to flag enabled,
  in order to better align with OpenTelemetry Semantic conventions for HTTP spans.
• Remove SIGNALFX_SANITIZE_SQL_STATEMENTS configuration as all field
  sanitizations are moving to the Splunk Distribution of OpenTelemetry Collector.
• Remove SIGNALFX_OUTBOUND_HTTP_EXCLUDED_HOSTS configuration as
  Splunk OpenTelemetry Collector
  is the recommended place for spans filtering.
  If you need span exclusion for specific URL substrings, it can be configured
  using SIGNALFX_TRACE_HTTP_CLIENT_EXCLUDED_URL_SUBSTRINGS environment variable.
• Remove SIGNALFX_INSTRUMENTATION_ASPNETCORE_DIAGNOSTIC_LISTENERS configuration
  which is no longer needed. It provided a workaround for an issue in a specific
  version of a library, which broke default instrumentation, and was already fixed.
• Remove SIGNALFX_SERVICE_NAME_PER_SPAN_ENABLED configuration as
  the OpenTelemetry specification
  requires that the resources (such us as service)
  have to be immutable.
• Remove SIGNALFX_INTEGRATIONS. This configuration is not needed.
  The instrumentation called CallSite was removed.
• Deprecate SIGNALFX_TRACE_LOG_PATH. Please use SIGNALFX_TRACE_LOG_DIRECTORY.

Enhancements

• Add Aerospike.Client
  library instrumentation.
• Add Microsoft.Data.SqlClient
  and System.Data.SqlClient
  library instrumentation.
• Adopt OpenTelemetry Trace Semantic Conventions
  in most of the instrumentations.
• Add SIGNALFX_HTTP_SERVER_ERROR_STATUSES configuration that controls server
  HTTP statuses to set spans as errors.
• Add SIGNALFX_HTTP_CLIENT_ERROR_STATUSES configuration that controls client
  HTTP statuses to set spans as errors.
• Add SIGNALFX_STDOUT_LOG_TEMPLATE configuration that configures stdout template.
• Add SIGNALFX_TRACE_DELAY_WCF_INSTRUMENTATION_ENABLED configuration that
  enables the updated WCF instrumentation that delays execution until later in
  the WCF pipeline when the WCF server exception handling is established.
• Add SIGNALFX_TRACE_HEADER_TAGS configuration that sets a map of header keys
  to tag names.
• Add SIGNALFX_TRACE_KAFKA_CREATE_CONSUMER_SCOPE_ENABLED configuration that
  closes consumer scope on method enter, and starts a new one on method exit.
• Add SIGNALFX_TRACE_LOG_DIRECTORY configuration that sets directory for logs
  and overrides the value in SIGNALFX_TRACE_LOG_PATH if present.
• Add SIGNALFX_TRACE_LOGGING_RATE configuration that sets the number of seconds
  between identical log messages for tracer log files.
• Add SIGNALFX_TRACE_PARTIAL_FLUSH_ENABLED configuration that enables partial
  flush of traces.
• Add SIGNALFX_TRACE_PARTIAL_FLUSH_MIN_SPANS configuration that sets the minimum
  number of closed spans in a trace before it's partially flushed.
• Add SIGNALFX_VERSION configuration that sets the application's version that
  will populate the version tag on spans.
• Add SIGNALFX_TRACE_STARTUP_LOGS configuration that enables diagnostic log
  at startup.
• Add SIGNALFX_TRACE_{0}_ENABLED configuration pattern that enables/disables
  specific integration.
• Add SIGNALFX_TRACE_HTTP_CLIENT_EXCLUDED_URL_SUBSTRINGS configuration that
  sets URLs skipped by the tracer.
• Add SIGNALFX_AZURE_APP_SERVICES configuration that indicates the profiler
  is running in the context of Azure App Services.
• SIGNALFX_ENDPOINT_URL now defaults to http://localhost:9411/api/v2/spans.