update README

Author: nvanthao

applications/fake-services/README.md

@@ -19,3 +19,43 @@ This repository contains an example Helm chart that distributed with Replicated
 - [x] Github Actions workflow for Replicated test and release
 - [x] Support Replicated Proxy Service
 - [x] Support Replicated Custom Domain
+
+## Troubleshooting features for CRE
+
+We do include utility pods to peek into KOTS Admin Console underlying database and object storage (Minio).
+
+### rqlite
+
+For database, to peek into `rqlite` database, you can use the following command:
+
+```bash
+kubectl port-forward svc/rqlite-ui-service 3000:80
+```
+
+And go to http://localhost:3000 to browse the database.
+
+![rqlite-ui](img/rqlite-ui.png)
+
+### Minio
+
+For object storage, to peek into `minio` object storage, you can use the following command:
+
+First, get the WebUI port from `kotsadm-minio-0` pod:
+
+```log
+kubectl logs kotsadm-minio-0
+...
+WebUI: http://10.42.0.11:<port>> http://127.0.0.1:<port>  
+```
+
+Next, port forward to the WebUI port:
+
+```bash
+kubectl port-forward svc/kotsadm-minio <port>:<port>
+```
+
+And go to http://localhost:<port> to browse the object storage.
+
+The username is `admin` and the password is the secretkey in `kotsadm-minio` secret.
+
+![minio-ui](img/minio-ui.png)