Add note for test env install with custom domain
@@ -44,6 +44,10 @@ With DNS now available the second step actually installs the cluster:
epinio install --system-domain test.example.com --tls-issuer=letsencrypt-production --use-internal-registry-node-port=false
```
+*Note* The issuer `letsencrypt-production` will work only, if your custom domain, e.g. "test.example.com", is reachable from the internet.
+For test, or internal environments, where your custom domain isn't reachable from the internet, you need to choose a differen issuer.
+E.g. if you would use the custom domain "test.internal.com", `epinio install --system-domain test.internal.com` would default to the `epinio-ca` issuer.
+
## DNS Configuration Examples
### AWS EKS and Route53
