Comment 2 for bug 1416133

Ubuntu HA should be vulnerable to that bug too.
It's happened because new ntp 4.2.8 package was merged into master, and it create /var/lib/ntp directory. In our ntp preseed snippet we use long line of 'command && mkdir /var/lib/ntp && command && echo "server $server burst iburst" >> /target/etc/ntp.conf && command'. As long as package ntp-dev installed before snippet applies, so /var/lib/ntp alreade exists on moment applying that part of snippet and command that adding string with 'server' doesn't applies. After that ubuntu node sync to nothing and after that time is desynced.

Workaround is manually created string "server <server name or IP here> burst iburst" in /etc/ntp.conf.