[Debian-ha-maintainers] Bug#577965: corosync fails to install when user ais already exists

[Luke Crawford]

I'm trying to install corosync on a system that already has a user 'ais'  -
 a user that I can't overwrite or otherwise get rid of.

I'm running into the same problem as Thorsten Glaser ran into five years
ago, only I'm trying to install corosync 2.3.3-1ubuntu1, on ubuntu 14.04



$ sudo apt-get install corosync
...

Setting up corosync (2.3.3-1ubuntu1) ...
adduser: The user `ais' already exists. Exiting.
dpkg: error processing package corosync (--configure):

...


My current work-around is to go into  /var/lib/dpkg/info/corosync.postinst

and replacing all instances of ais with ais_corosync   -  then I re-run the
apt-get install;  it works and gives me a working system, but this seems
like the wrong way to do it, and I'm pretty sure I'm gonna experience
significant pain next time the corosync package is updated.
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