Previously, by default, the HAProxy did not listen on IPv6 virtual IP addresses. As a result, OpenStack services that used the 'bind' statement were not available.
As a workaround, HAProxy now requires you to set up 'transparent' on the 'bind' statements that use the IPv6 virtual IP addresses. For example,
bind fc00::eeee:8777 transparent
Note: The 'transparent' option must never be used with "wildcard" 'bind' statements, as follows:
As a result, HAProxy now listens to IPv6 virtual IP addresses.