Another alternative idea: you probably won't be comfortable with this,
but check out systemd-nspawn. There are lots of examples online, and
even I wrote about how I use it:
http://raw-sewage.net/articles/fedora-under-centos/
This is unfortunately another "sysadmin" solution to your problem.
nspawn is the successor to chroot, if you are at all familiar with
that. It's kinda-sorta like running a system-within-a-system, but
much more lightweight. The "slave" systems share the running kernel
with the "master" system. (I could say the "guest" and "host"
systems, but those are virtual machine terms, and this is not a
virtual machine.) For your particular case, the main benefit is that
you can natively share filesystems, rather than use NFS to share
files.
So, it's clear you have network capability between the C6 and C7
systems. And surely you must have ssh installed on both systems.
Therefore, you can transfer files between C6 and C7. So here's a way
you can use systemd-nspawn to get around trying to install all the
extra libs you need on C7:
1. On the C7 machine, create a systemd-nspawn container. This
container will "run" C6.
2. You can source everything you need from the running C6 system
directly. Heck, if you have enough disk space on the C7 system, you
could just replicate the whole C6 tree to a sub-directory on C7.
3. When you configure the C6 nspawn container, make sure you pass
through the directory structure with these FTP'ed files. Basically
you are substituting systemd-nspawn's bind/filesystem pass-through
mechanism in place of NFS.
With that setup, you can "probably" run all the C6 native stuff under
C7. This isn't guaranteed to work, e.g. if your C6 programs require
hooks into the kernel, it could fail, because now you're running on a
different kernel... but if you only use userspace libraries, you'll
probably be OK. But I was actually able to get HandBrake, compiled
for bleeding-edge Ubuntu, to work within a C7 nspawn container.
That probably trades one bit of complexity (NFS) for another
(systemd-nspawn). But just throwing it out there if you're completely
stuck.
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
https://lists.centos.org/mailman/listinfo/centos
