git push to gitlab ssh失败了

I installed gitlab omnibus on my local Ubuntu 14.04 desktop about a month ago and have used it heavily for project management and version control. I recently tried setting the server up as a public-facing server and thus changed the hostname and updated /etc/hosts to enable this. Once this change was made, I have been unable to push to my gitlab repositories, which has unfortunately halted all progress on several projects. Upon finding this issue, I reverted the server hostname and /etc/hosts file back to their original states as a few of many steps in troubleshooting the issue. Nothing has worked yet, as I am getting prompted for the user login for git@[myserver] rather than using the SSH key that is in place and was working previously.I installed gitlab omnibus on my local Ubuntu 1