Releases v1.8.0
v1.8.0 (2021-11-12)
Context
Add a section for OTel specific values in TraceState.#1852 )
Add none as a possible value for OTEL_PROPAGATORS to disable context propagation.#2052 )
Traces
Metrics
Add optional min / max fields to histogram data model.#1915 ,#1983 )
Add exponential histogram to the metrics data model.#1935 )
Add clarifications on how to handle numerical limits.#2007 )
Add environment variables for Periodic exporting MetricReader.#2038 )
Specify that the SDK must support exporters to access meter information.#2040 )
Add clarifications on how to determine aggregation temporality.#2013 ,#2032 )
Mark Metrics API spec as Stable.#2104 )
Clarify, fix and expand documentation sections:#1966 ),#1981 ),#1995 ),#2002 ),#2010 )
Logs
Fix Syslog severity number mapping in the example.#2091 )
Add log.* attributes.#2022 )
Resource
Semantic Conventions
Add k8s.container.restart_count Resource attribute.#1945 )
Add "IBM z/Architecture" (s390x) to host.arch#2055 )
BREAKING: Remove db.cassandra.keyspace and db.hbase.namespace, and clarify db.name#1973 )
Add AWS App Runner as a cloud platform#2004 )
Add Tencent Cloud as a cloud provider.#2006 )
Don't set Span.Status for 4xx http status codes for SERVER spans.#1998 )
Add attributes for Apache RocketMQ.#1904 )
Define http tracing attributes provided at span creation time#1916 )
Change meaning and discourage use of faas.trigger for FaaS clients (outgoing).#1921 )
Clarify difference between container.name and k8s.container.name#1980 )
Compatibility
OpenTelemetry Protocol
Clarify default for OTLP endpoint should, not must, be https#1997 )
Specify the behavior of the OTLP endpoint variables for OTLP/HTTP more strictly#1975 ,#1985 )
Make OTLP/HTTP the recommended default transport (#1969 )
SDK Configuration
Unset and empty environment variables are equivalent.#2045 )
Telemetry Schemas
Added telemetry schemas documents to the specification (#2008 )
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