First time using Jenkins. I'm trying to deploy a Jenkins server which will build my App Engine projects. This tutorial by Google only explains how to build an App Engine app which is a part of the same project as the Jenkins VM.
I want my Jenkins server to build ALL of my App Engine apps, thus I need it decoupled from the project. I'm trying to do it with another project. So, to the question. I have project A which I want to build and project B which has Jenkins on it. I get an 403 error from Jenkins when I try to access the git cloud repository of project A (code to be built) from project B (Jenkins) with Service Account credentials.
Which project's service account creds should be I using in the Jenkins' build setup? Is there any other setup needed on the project side?