Foreman » Installer

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1349936
Description of problem:

Installer should append entries to zones.conf file and not overwrite it.

Unless we enhance the installer to append entries to zones.conf file, it would be very hackish for the end user to get vm's provisioned under different domains to provision. for example: simultaneously trying to do both rhevm (xyz.example.com/"100.168.192.in-addr.arpa" ) and openstack ( abc.example.com/"120.168.192.in-addr.arpa")

Version-Release number of selected component (if applicable):
sat62-snap17.0

How reproducible:

Steps to Reproduce:
1. Run, "satellite-installer --foreman-proxy-dns-zone xyz.example.com" updates /etc/zones.conf file.
2. run, "satellite-installer --foreman-proxy-dns-zone abc.example.com" overwrites /etc/zones.conf file.
3.

Actual results:
Running "satellite-installer --foreman-proxy-dns-zone xyz.example.com" currently overwrites entries to /etc/zones.conf and not append them.

Running "satellite-installer --foreman-proxy-dns-reverse "120.168.192.in-addr.arpa" currently overwrites entries to /etc/zones.conf and not append them.

Expected results:
Running "satellite-installer --foreman-proxy-dns-zone xyz.example.com" should append entries to /etc/zones.conf and not overwrite them.

We should be able to pass "--foreman-proxy-dns-zone" and "--foreman-proxy-dns-reverse" multiple times like "--foreman-proxy-dns-forwarders" or be able to pass multiple forward/reverse entries as a list, with a single option to installer.

Additional info: