adding updated doc ruby lambda and environment variables for ruby lib…

content/en/docs/faas/lambda-auto-instrument.md

@@ -11,6 +11,7 @@ for the following languages:
 - Java
 - JavaScript
 - Python
+- Ruby
 
 These can be added to your Lambda using the AWS portal to automatically
 instrument your application. These layers do not include the Collector which is
@@ -80,12 +81,19 @@ information about supported Python versions, see the
 [OpenTelemetry Python documentation](https://github.com/open-telemetry/opentelemetry-python/blob/main/README.md#supported-runtimes)
 and the package on [PyPi](https://pypi.org/project/opentelemetry-api/).
 
+{{% /tab %}} {{% tab Ruby %}}
+
+The Lambda layer supports Ruby 3.2 and 3.3 Lambda runtimes. For more information
+about supported OpenTelemetry Ruby SDK and API versions, see the
+[OpenTelemetry Ruby documentation](https://github.com/open-telemetry/opentelemetry-ruby)
+and the package on [RubyGem](https://rubygems.org/search?query=opentelemetry).
+
 {{% /tab %}} {{< /tabpane >}}
 
 ### Configure `AWS_LAMBDA_EXEC_WRAPPER`
 
 Change the entry point of your application by setting
-`AWS_LAMBDA_EXEC_WRAPPER=/opt/otel-handler` for Node.js or Java, and
+`AWS_LAMBDA_EXEC_WRAPPER=/opt/otel-handler` for Node.js or Java or Ruby, and
 `AWS_LAMBDA_EXEC_WRAPPER=/opt/otel-instrument` for Python. These wrapper scripts
 will invoke your Lambda application with the automatic instrumentation applied.
 
@@ -131,6 +139,11 @@ uses the protocol `http/protobuf`
 `OTEL_EXPORTER_OTLP_PROTOCOL=http/protobuf` supports: `http/protobuf` and
 `http/json` `OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4318`
 
+{{% /tab %}} {{% tab Ruby %}}
+
+`OTEL_EXPORTER_OTLP_PROTOCOL=http/protobuf` supports: `http/protobuf`
+`OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4318`
+
 {{% /tab %}} {{< /tabpane >}}
 
 ### Publish your Lambda

content/en/docs/languages/ruby/libraries.md

@@ -98,6 +98,45 @@ OpenTelemetry::SDK.configure do |c|
 end
 ```
 
+### Configuring specific instrumentation libraries with environment variable
+
+#### To disable specific instrumentation libraries
+
+If you prefer to disable specific instrumentation libraries more selectively
+using environment variables, you can do that too. An instrumentation disabled by
+environment variable will take precedence over local config. The convention for
+environment variable name is the library name, upcased with `::` replaced by
+underscores, `OPENTELEMETRY` shortened to `OTEL_LANG`, and `_ENABLED` appended.
+
+For example:
+
+```bash
+export OTEL_RUBY_INSTRUMENTATION_SINATRA_ENABLED=false
+```
+
+#### To configure specific instrumentation libraries
+
+You can also define the option for specific instrumentation libraries using
+environment variables. By convention, the environment variable will be the name
+of the instrumentation, with uppercase, `::` replaced by underscores,
+`OPENTELEMETRY` shortened to `OTEL_{LANG}`, and `_CONFIG_OPTS` appended.
+
+For example, the environment variable name for
+OpenTelemetry::Instrumentation::Faraday will be
+`OTEL_RUBY_INSTRUMENTATION_FARADAY_CONFIG_OPTS`. A value of
+`peer_service=new_service;span_kind=client` will override the options set from
+[previous section](#configuring-specific-instrumentation-libraries) for Faraday.
+
+```bash
+export OTEL_RUBY_INSTRUMENTATION_FARADAY_CONFIG_OPTS="peer_service=new_service;span_kind=client"
+```
+
+For an array option, simply separate the values with commas (e.g.,
+option=a,b,c,d).<br> For a boolean option, set the value to true or false (e.g.,
+option=true).<br> For integer, string, enum, set the value as a string (e.g.,
+option=string).<br> Callable options are not allowed to be set through
+environment variables.
+
 ### Next steps
 
 Instrumentation libraries are the easiest way to generate lots of useful

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