docs: Add warnings about password selection
Some services fail when using special characters in passwords, add some
warnings to our docs.
Closes-Bug: 1744985
Change-Id: I601149e2e7362507b38f01719f7197385a27e0a8
diff --git a/doc/source/index.rst b/doc/source/index.rst
index 0434d68..ba7ea42 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -101,7 +101,10 @@
This is the minimum required config to get started with DevStack.
.. note:: There is a sample :download:`local.conf </assets/local.conf>` file
- under the *samples* directory in the devstack repository.
+ under the *samples* directory in the devstack repository.
+
+.. warning:: Only use alphanumeric characters in your passwords, as some
+ services fail to work when using special characters.
Start the install
-----------------