I've been trying to get cross account ec2 role authorisation working for a while now but seem to be hitting a bit of a dead end. We currently have cross account user authentication which is working well, however expanding that to cross account ec2 role access doesn't seem possible as far as I can tell?
I came across the following Cross Account Article, which basically undertook the same steps I had with similar results. Has a workaround for this come to fruition yet, or is it still required to use the Use-STSRole powershell/aws assume-role trick?