wu-sheng commented on a change in pull request #6183:
URL: https://github.com/apache/skywalking/pull/6183#discussion_r569474059
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File path: docs/en/concepts-and-designs/event.md
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+# Events
+
+SkyWalking already supports the three pillars of observability, namely logs,
metrics, and traces.
+In reality, a production system experiences many other events that may affect
the performance of the system, such as upgrading, rebooting, chaos testing, etc.
+Although some of these events are reflected in the logs, there are many other
events that can not. Hence, SkyWalking provides a more native way to collect
these events.
+This doc covers the design of how SkyWalking collects events and what events
look like in SkyWalking.
+
+## How to Report Events
+
+SkyWalking backend supports three protocols to collect events, gRPC, HTTP, and
Kafka. Any agent or CLI that implements one of these protocols can report
events to SkyWalking.
+Currently, the officially supported clients to report events are:
+
+- [ ] Java Agent Toolkit: Use the Java agent toolkit to report events from
inside the applications.
+- [x] SkyWalking CLI: Use the CLI to report events from the command line
interface.
+- [ ] Kubernetes Event Exporter: Deploy an event exporter to refine and report
Kubernetes events.
+
+## Event Definition
+
+An event contains the following fields. The definitions of event can be found
at the [protocol repo](#TODO)
Review comment:
Please finish this TODO
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