If linux comes out with tools remotely approaching the quality of either freebsd or solaris planning everyone should drop what they're doing to go watch. Linux ain't gonna improve itself, and the pains of docker are an excellent entry to pressuring linux devs to do anything that can improve userspace experience, an otherwise deeply unlikely prospect. It took them more than a decade to implement basic jailing after BSDs and the tech is still, shall we say, extremely rough....
The ancient rhel something something doesn’t like the debian other thing, and I even saw a changelog about broken kernel compatibility and flipping a flag in proc or cmdline but then I forgot what it said.
Whatever. Life is short. Docker is in no way independent of the host kernel. Spend time debugging something else.
SmartOS is great though. I wish they’d take over the world.
If the host system does not enable vsyscall emulation, running binaries on such old distributions will lead to segfaults. (Which can be resolved by booting the host kernel with vsyscall=emulate.)
I would love any details you can provide; that sounds interesting. (I'm an OS nerd)
And i should say I love SmartOS, it is a really cool bit of tech... I just love simplicity more, and a compatibility layer is never simple.