The "Failover with Keepalived" tutorial seems to be missing some details that are available in a more recent blog post. For example, compare the following documentation page:
To the following blog post:
A major difference is that the blog post has some great information in the "MaxScale active/passive-setting" section, where it mentions how to use maxctrl to change the active instance.
It looks like this may have already been "Fixed" as part of
MXS-1638, but I still don't see the information in the KB.