chore: update otel example

Author: vmihailenco

example/otel/README.md

@@ -1,16 +1,34 @@
 # Example for go-redis OpenTelemetry instrumentation
 
-This example requires running Redis Server. You can start Redis Server using Docker:
+See [Monitoring performance and errors](https://redis.uptrace.dev/guide/tracing.html) for details.
+
+This example requires Redis Server on port `:6379`. You can start Redis Server using Docker:
 
 ```shell
 docker-compose up -d
 ```
 
-To run this example:
+You can run this example with different OpenTelemetry exporters by providing environment variables.
+
+**Stdout** exporter (default):
 
 ```shell
 go run .
 ```
 
-See [Monitoring performance and errors](https://redis.uptrace.dev/guide/tracing.html) for more
-details.
+**Jaeger** exporter:
+
+```shell
+OTEL_EXPORTER_JAEGER_ENDPOINT=http://localhost:14268/api/traces go run .
+```
+
+**Uptrace** exporter:
+
+```shell
+UPTRACE_DSN="https://<token>@uptrace.dev/<project_id>" go run .
+```
+
+## Links
+
+- [Find instrumentations](https://opentelemetry.uptrace.dev/instrumentations/?lang=go)
+- [OpenTelemetry Tracing API](https://opentelemetry.uptrace.dev/guide/go-tracing.html)

example/otel/go.mod

@@ -11,8 +11,13 @@ replace github.com/go-redis/redis/extra/rediscmd/v8 => ../../extra/rediscmd
 require (
 	github.com/go-redis/redis/extra/redisotel/v8 v8.11.4
 	github.com/go-redis/redis/v8 v8.11.4
-	go.opentelemetry.io/otel v1.0.0
-	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.0.0
-	go.opentelemetry.io/otel/sdk v1.0.0
-	golang.org/x/sys v0.0.0-20210923061019-b8560ed6a9b7 // indirect
+	github.com/uptrace/opentelemetry-go-extra/otelplay v0.1.3
+	github.com/uptrace/uptrace-go v1.1.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/runtime v0.26.1 // indirect
+	go.opentelemetry.io/otel v1.1.0
+	go.opentelemetry.io/proto/otlp v0.10.0 // indirect
+	golang.org/x/net v0.0.0-20211104170005-ce137452f963 // indirect
+	golang.org/x/sys v0.0.0-20211103235746-7861aae1554b // indirect
+	google.golang.org/genproto v0.0.0-20211104193956-4c6863e31247 // indirect
+	google.golang.org/grpc v1.42.0 // indirect
 )