skywalking-java/docs/en/setup/backend/ui-setup.md

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# UI
SkyWalking UI distribution is already included in our Apache official release.
## Startup
Startup script is also in `/bin/webappService.sh`(.bat). UI runs as an OS Java process, powered-by Zuul.
## Settings
Setting file of UI is `webapp/webapp.yml` in distribution package. It is constituted by three parts.
1. Listening port.
1. Backend connect info.
```yaml
server:
port: 8080
spring:
cloud:
gateway:
routes:
- id: oap-route
uri: lb://oap-service
predicates:
- Path=/graphql/**
discovery:
client:
simple:
instances:
oap-service:
# Point to all backend's restHost:restPort, split by URI arrays.
- uri: http://127.0.0.1:12800
- uri: http://instance-2:12800
```