I’ve just finished building a new Vagrant box for Oracle 12c. This one uses only Vagrant and a shell script.
Grab it from github: https://github.com/steveswinsburg/oracle12c-vagrant
During the course of this install I came up against several issues with the Oracle silent installer itself. There were files missing, an incomplete compilation of binaries (but Oracle reports a successful install!) and then problems running scripts that ship with the installer. The issues were buried in log files, and sometimes those log files pointed at other log files!
Oracle, if you are listening, you really need to work on your installer…
Check it out, I would love to know what you think.