Tracing: Support remote, rate-limited, and probabilistic sampling in tracing.opentelemetry config section (#73587)

* tracing: Support remote sampling server

Signed-off-by: Dave Henderson <dave.henderson@grafana.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

* Update docs/sources/setup-grafana/configure-grafana/_index.md

* Update docs/sources/setup-grafana/configure-grafana/_index.md

* Satisfying the doc-validator check

* satisfy prettier

Signed-off-by: Dave Henderson <dave.henderson@grafana.com>

* back out unnecessary change

Signed-off-by: Dave Henderson <dave.henderson@grafana.com>

---------

Signed-off-by: Dave Henderson <dave.henderson@grafana.com>
Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

docs/sources/setup-grafana/configure-grafana/_index.md

@@ -1801,6 +1801,8 @@ Refer to https://www.jaegertracing.io/docs/1.16/sampling/#client-sampling-config
 
 Can be set with the environment variable `JAEGER_SAMPLER_TYPE`.
 
+_To override this setting, enter `sampler_type` in the `tracing.opentelemetry` section._
+
 ### sampler_param
 
 Default value is `1`.
@@ -1816,10 +1818,14 @@ This is the sampler configuration parameter. Depending on the value of `sampler_
 
 May be set with the environment variable `JAEGER_SAMPLER_PARAM`.
 
+_Setting `sampler_param` in the `tracing.opentelemetry` section will override this setting._
+
 ### sampling_server_url
 
 sampling_server_url is the URL of a sampling manager providing a sampling strategy.
 
+_Setting `sampling_server_url` in the `tracing.opentelemetry` section will override this setting._
+
 ### zipkin_propagation
 
 Default value is `false`.
@@ -1846,6 +1852,31 @@ Comma-separated list of attributes to include in all new spans, such as `key1:va
 
 Can be set with the environment variable `OTEL_RESOURCE_ATTRIBUTES` (use `=` instead of `:` with the environment variable).
 
+### sampler_type
+
+Default value is `const`.
+
+Specifies the type of sampler: `const`, `probabilistic`, `ratelimiting`, or `remote`.
+
+### sampler_param
+
+Default value is `1`.
+
+Depending on the value of `sampler_type`, the sampler configuration parameter can be `0`, `1`, or any decimal value between `0` and `1`.
+
+- For the `const` sampler, use `0` to never sample or `1` to always sample
+- For the `probabilistic` sampler, you can use a decimal value between `0.0` and `1.0`
+- For the `rateLimiting` sampler, enter the number of spans per second
+- For the `remote` sampler, use a decimal value between `0.0` and `1.0`
+  to specify the initial sampling rate used before the first update
+  is received from the sampling server
+
+### sampling_server_url
+
+When `sampler_type` is `remote`, this specifies the URL of the sampling server. This can be used by all tracing providers.
+
+Use a sampling server that supports the Jaeger remote sampling API, such as jaeger-agent, jaeger-collector, opentelemetry-collector-contrib, or [Grafana Agent](/oss/agent/).
+
 <hr>
 
 ## [tracing.opentelemetry.jaeger]