/etc/sysconfig is RHEL/CentOS specific

[onitake]

The path for the systemd unit environment file is currently hard-coded to /etc/sysconfig/activemq .

This will work on most installations, but /etc/sysconfig/ is a path specific to RHEL/CentOS/etc.
On Debian, for example, init script environment files are stored in /etc/default/ .
Even on RH, /etc/default/ has started to see some use lately.

I recommend making the path customisable via an Ansible variable or moving environment variables directly into the service file.

Quote the systemd overlord himself:

Use of EnvironmentFile= is pretty much always a bad idea, and we probably should never have added that, since it invites packagers to reintroduce the /etc/default/ and /etc/sysconfig/ madness we try to remove.
-- systemd/systemd#618 (comment)

[onitake]

Also, it may be a good idea to make the installation mode independent of the package manager...

[hagzag]

PR's are welcome