Added authentication

Author: ewoutp

docs/Manual/Deployment/Kubernetes/Authentication.md

@@ -0,0 +1,18 @@
+# Authentication
+
+The ArangoDB Kubernetes Operator will by default create ArangoDB deployments
+that require authentication to access the database.
+
+It uses a single JWT secret (stored in a Kubernetes secret)
+to provide *super-user* access between all servers of the deployment
+as well as access from the ArangoDB Operator to the deployment.
+
+To disable authentication, set `spec.auth.jwtSecretName` to `None`.
+
+Initially the deployment is accessible through the web user-interface and
+API's, using the user `root` with an empty password.
+Make sure to change this password immediately after starting the deployment!
+
+## See also
+
+- [Secure connections (TLS)](./Tls.md)

docs/Manual/Deployment/Kubernetes/Tls.md

@@ -1,4 +1,4 @@
-# TLS
+# Secure connections (TLS)
 
 The ArangoDB Kubernetes Operator will by default create ArangoDB deployments
 that use secure TLS connections.
@@ -48,3 +48,7 @@ To install a CA certificate in Linux, on Ubuntu, run:
 sudo cp ca.crt /usr/local/share/ca-certificates/<some-name>.crt
 sudo update-ca-certificates
 ```
+
+## See also
+
+- [Authentication](./Authentication.md)