Verify that there is at least 1.6Gb of usable RAM on the system. Swap
is not considered. While swap would allow a user to minimally install
IPA it would not be a great experience.
Using any proc-based method to check for available RAM does not
work in containers unless /proc is re-mounted so use cgroups
instead. This also handles the case if the container has memory
constraints on it (-m).
There are envs which mount 'proc' with enabled hidepid option 1
so don't assume that is readable.
Add a switch to skip this memory test if the user is sure they
know what they are doing.
is_hidepid() contributed by Stanislav Levin <slev@altlinux.org>
https://pagure.io/freeipa/issue/8404
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Stanislav Levin <slev@altlinux.org>
Rob Crittenden
cfad7af35d