Add semantic conventions for redis receiver

update CHANGELOG.md and README.md for redis resource semantic convention

added db.redis.instance semantic convention

added db.redis.instance attribute

CHANGELOG.md

@@ -532,6 +532,8 @@ release.
   conventions. ([#2272](https://github.com/open-telemetry/opentelemetry-specification/pull/2272))
 - Add opentracing.ref_type semantic convention.
   ([#2297](https://github.com/open-telemetry/opentelemetry-specification/pull/2297))
+- Add `db.redis.instance` Resource attribute in Redis.
+  ([#2145](https://github.com/open-telemetry/opentelemetry-specification/pull/2145))
 
 ### Compatibility
 

semantic_conventions/resource/db/redis.yaml

@@ -0,0 +1,14 @@
+groups:
+  - id: redis
+    prefix: db.redis
+    brief: >
+        A redis instance
+    attributes:
+      - id: instance
+        type: string
+        brief: >
+          The reported name of the Redis instance. This can be in the form of
+          `{host}:{port}` or any other name provided manually while configuring
+          the instrumentation. If not provided, the default value is the `endpoint`
+          value provided in the configuration.
+        examples: ['localhost:6379', 'product_info_redis']

specification/resource/semantic_conventions/README.md

@@ -19,6 +19,7 @@ This document defines standard attributes for resources. These attributes are ty
 - [Compute Unit](#compute-unit)
 - [Compute Instance](#compute-instance)
 - [Environment](#environment)
+- [Database](#database)
 - [Version attributes](#version-attributes)
 - [Cloud-Provider-Specific Attributes](#cloud-provider-specific-attributes)
 
@@ -158,6 +159,12 @@ Attributes defining a running environment (e.g. Operating System, Cloud, Data Ce
   - [Kubernetes](./k8s.md)
 - [Browser](./browser.md)
 
+## Database
+
+Attributes defining a database service.
+
+- [Redis](./db/redis.md)
+
 ## Version attributes
 
 Version attributes, such as `service.version`, are values of type `string`. They are

specification/resource/semantic_conventions/db/redis.md

@@ -0,0 +1,13 @@
+# Redis
+
+**Status**: [Experimental](../../../document-status.md)
+
+**type:** `db.redis`
+
+**Description:** A redis instance
+
+<!-- semconv redis -->
+| Attribute  | Type | Description  | Examples  | Required |
+|---|---|---|---|---|
+| `db.redis.instance` | string | The reported name of the Redis instance. This can be in the form of `{host}:{port}` or any other name provided manually while configuring the instrumentation. If not provided, the default value is the `endpoint` value provided in the configuration. | `localhost:6379`; `product_info_redis` | No |
+<!-- endsemconv -->