[skywalking] branch doc updated: Polish

[wu...@apache.org]

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wusheng pushed a commit to branch doc
in repository https://gitbox.apache.org/repos/asf/skywalking.git


The following commit(s) were added to refs/heads/doc by this push:
     new 16f1a0e028 Polish
16f1a0e028 is described below

commit 16f1a0e02861a1c9874b6bb8d188d8e10da4b567
Author: Wu Sheng <wu...@foxmail.com>
AuthorDate: Tue Jan 17 21:47:50 2023 +0800

    Polish
---
 docs/en/setup/backend/backend-telemetry.md | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/docs/en/setup/backend/backend-telemetry.md b/docs/en/setup/backend/backend-telemetry.md
index 50168a980f..6d2c3b82ea 100644
--- a/docs/en/setup/backend/backend-telemetry.md
+++ b/docs/en/setup/backend/backend-telemetry.md
@@ -18,8 +18,23 @@ telemetry:
 You may also set `Prometheus` to enable them. For more information, refer to the details below.
 
 ## Self Observability
+SkyWalking supports exposing telemetry data representing OAP running status through Prometheus endpoint.
+Users could set up OpenTelemetry collector to scrap and forward telemetry data to OAP server for further analysis, 
+eventually showing up UI or GraphQL API.
+
 ### Static IP or hostname
-Set up OpenTelemetry to scrape the metrics from OAP telemetry.
+Add the following configuration to enable self-observability-related modules.
+
+1. Set up prometheus telemetry.
+```yaml
+telemetry:
+  selector: ${SW_TELEMETRY:prometheus}
+  prometheus:
+    host: 127.0.0.1
+    port: 1543
+```
+
+2. Set up OpenTelemetry to scrape the metrics from OAP telemetry.
 
 Refer to [the E2E test case](../../../../test/e2e-v2/cases/so11y/otel-collector-config.yaml) as an example.
 
@@ -87,6 +102,8 @@ For the full example for OpenTelemetry Collector configuration and recommended v
 
 ___
 
+Users also could leverage the Prometheus endpoint for their own Prometheus and Grafana.
+
 **NOTE**: Since Apr 21, 2021, the **Grafana** project has been relicensed to **AGPL-v3**, and is no longer licensed for Apache 2.0. Check the LICENSE details.
 The following Prometheus + Grafana solution is optional rather than recommended.