Docker 0-Day Stopped Cold by SELinux
SELinux used to be one of those things you'd disable immediately upon installing a new RHEL/CentOS box for all the troubles it would cause. But default policies have evolved a lot, making this the wrong thing to do, for a few years now. But people still do it out of habit.<p>If you ignore SELinux, it won't cause issues besides the ocasional need to run "restorecon" (which one gets into the habit of doing whenever an "access denied" error happens when permissions seem otherwise correct).<p>But one problem still remains. SELinux is (very) complex and people (myself included) have a very hard time groking its base concepts. This limits adoption greatly, and I'm still to find a decent document that starts from the simple stuff and lets one build a mental concept of how it works before jumping into the more complicated (real-world) use cases.