Herbert Poetzl wrote:
On Fri, Jun 23, 2006 at 08:53:15AM -0700, Roderick A. Anderson wrote:
I'm trying to make copies of a Vserver guest. These will all be on
the same system.
So far I have:
Started with a FC5 Linux-Vserver install ( per
http://linux-vserver.org/VServer+installation+Fedora+Core+5. ) The
system was already running a stock FC5 install with some updates.
I followed that with:
[EMAIL PROTECTED] ~]# vserver $REF build -m yum \
--context $LO \
--hostname=$REF.$DOMAIN \
--interface site0=eth0:192.168.112.$LO/25 \
--initstyle sysv \
-- -d fc5
Then a few packages to make the system usable plus a few to make it a
onetime vyum run for individual packages.
[EMAIL PROTECTED] ~]# vyum $REF -- -y install \
rootfiles passwd ntsysv system-config-date vixie-cron \
crontabs vim-minimal openssh* which less \
make gzip tar wget gpg unzip bzip2 \
elinks perl-DBD-Pg
Since most of the guests will be running web sites/applications.
[EMAIL PROTECTED] ~]# vyum $REF -- -y groupinstall "Web Server"
And we're always having to add in packages ( mostly from CPAN ) that
require a compile.
[EMAIL PROTECTED] ~]# vyum $REF -- -y groupinstall "Development Tools"
Now a little house keeping.
[EMAIL PROTECTED] ~]# echo -e \
"nameserver 192.168.112.7\nnameserver 192.168.112.11\n" > \
/vservers/$REF/etc/resolv.conf
vserver $REF start
vserver $REF exec pwconv
vserver $REF exec pwck
vserver $REF exec passwd root
---===+++***+++===---
Now I'm ready to make several "clones" of this system that will then
be "enhanced".
After much reading, searching, cursing, and drinking I'm still lost as
to what is the best route to do this. I think it is:
vserver $NEW build -m skelton \
--context $NEWLO \
--hostname=$NEW.$DOMAIN \
--interface site1=eth0:192.168.112.$NEWLO/25 \
Followed by some other stuff to wipe the /var/vservers/$NEW/* stuff and
copy the /var/vservers/$REF to /var/vservers/$NEW.
yep, that sounds good, the following things should
be considered though:
- the 'copy' process must not change the uid/gids
(i.e. --numeric for rsync, -a for cp, dump/restore)
( Type slowly please I'm a little thick sometimes. :-)
So should I use cp -a ( or not )?
- if you use xid tagging, each guest should get its
own tagging (which you have to apply after the copy)
- when using unification, make sure that the flags
and xid tags are correct
I once upon a time learned a little about xids. Where should I look for
some newbie background information?
- make sure that the 'template' is secure and does not
bring e.g. insecure device nodes into the guest
Hopefully it was created that way. I have no plans at this time to do
more than pretty basic stuff. The toughest thing I've encountered is
getting Catalyst ( with all its dependencies ) installed.
There will be a need to do some NFS mounts -- from the main host -- and
make parts of them available in the guests but I have a couple of ideas
of how to accomplish that.
Since we're retro-fitting this "running/working/testing" system to be
a Linux-Vserver I hesitate to try commands that might bring it to a
screaming halt.
Is this a good route or are there other methods that will be
fast/safer/whatever?
I was hoping that util-vserver would provide that by
now, but as far as I know, it still doesn't ...
Me too. I realize most ( if not all ) of the Linux-Vserver developers
have 'day' jobs and do this as time allows. Hopefully the solutions to
my needs will be useful to the whole community.
Rod
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