Comment 14 for bug 1584365

It's actually a package breaker. A fresh install:
apt-get install pcs fence-agents ldirectord
fails. The file mentioned above that needs removing corosync.conf, prevents apt from a successful install. Touching that to make it empty allows the install to complete. Which, apparently, breaks the token creator which breaks all the auth.
Also, before any of it will actually run,
gem install orderedhash
must complete or pcsd won't launch.
And then, to get both ipv6 and ipv4 both bind and acceptance of hosts, /usr/share/ssl.rb needs
  :BindAddress => '*',
  :Host => '*',
  :SSLEnable => true,

Initially the * was :: which didn't connect on ipv4, preventing some internal comm from happening much less joining clusters.

So, basically, "Just Works" is not happening here.