From: Dan Hrabarchuk (dan_at_findatradenow.com)
Date: Wed 30 Jul 2003 - 18:37:55 BST
Have you tried turning off root squashing?
Dan
On Fri, 2003-07-25 at 00:48, Darryl Ross wrote:
> Hey All,
>
> Have been lurking for a while, but this is a first post.
>
> I'm building a new data centre for my employer, and having used vserver
> on my own hardware we decided to use it as a solution in the new data
> centre.
>
> The basic setup is I have two machines which are acting as file servers
> (600Gb each) which are mirrored using drbd and do fail-over using
> heartbeat. They export a file system using NFS. On top of that I have 4
> machines which are the vserver application servers.
>
> What I would like to be able to do is run /vservers and /etc/vservers
> from NFS. This would make it easy to 'move' a virtual server from one
> application server to another with only the downtime required for a
> 'vserver vs stop' and then 'vserver vs start'. This would make it easier
> to cope with hardware failures on the application servers and also means
> that I can quite easily load balance the virtual servers across the
> hardware.
>
> Now, my problem is that when I try to start a vserver which is stored on
> NFS I get the following results:
>
>
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
> [root_at_apps4 root]# cat /etc/vservers/radius2.conf
> IPROOT="202.6.141.2"
> IPROOTDEV=eth0
> ONBOOT=no
> S_HOSTNAME=radius2.e-access.com.au
> S_DOMAINNAME=
> S_NICE=5
> S_FLAGS="lock nproc sched"
> ULIMIT="-H -u 1000"
> S_CAPS="CAP_NET_ADMIN CAP_SYS_CHROOT CAP_NET_BIND_SERVICE"
>
> [root_at_apps4 root]# mount
> /dev/md1 on / type ext3 (rw)
> none on /proc type proc (rw)
> /dev/md0 on /boot type ext3 (rw)
> none on /dev/pts type devpts (rw,gid=5,mode=620)
> none on /dev/shm type tmpfs (rw)
> 172.30.0.100:/mnt/data/vservers/conf on /etc/vservers type nfs
> (rw,addr=172.30.0.100)
> 172.30.0.100:/mnt/data/vservers/actual on /vservers type nfs
> (rw,addr=172.30.0.100)
>
> [root_at_apps4 root]# vserver radius2 start
> Starting the virtual server radius2
> Server radius2 is not running
> ipv4root is now 202.6.141.2
> Host name is now radius2.e-access.com.au
> New security context is 11
> Can't chroot to directory . (Permission denied)
>
> [root_at_apps4 root]# mount
> /dev/md1 on / type ext3 (rw)
> none on /proc type proc (rw)
> /dev/md0 on /boot type ext3 (rw)
> none on /dev/pts type devpts (rw,gid=5,mode=620)
> none on /dev/shm type tmpfs (rw)
> 172.30.0.100:/mnt/data/vservers/conf on /etc/vservers type nfs
> (rw,addr=172.30.0.100)
> 172.30.0.100:/mnt/data/vservers/actual on /vservers type nfs
> (rw,addr=172.30.0.100)
> none on /vservers/radius2/proc type proc (rw)
> none on /vservers/radius2/dev/pts type devpts (rw)
>
>
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
> I have done a google for this error, and the only references I can turn
> up are to do with the permissions on /vservers. The permission denied
> error occurs whether or not /vservers is mode 000 or mode 755
> (root:root). Additionally, /proc and /dev/pts within the virtual server
> are mounted afterwards and the IP alias is also active.
>
> The application servers are running:
> - Redhat 9.0 (with updates)
> - vserver 0.22 (I also tried 0.23 with no difference)
> - kernel 2.4.21ctx-17 (from the website)
>
> What I would like is if there is some way I can store /vservers on my
> file servers and remote mount them. have tried NFS, I don't think Samba
> will work and I looked at Coda, but that also had problems (you have to
> authenticate to get a kerberos token each session).
>
>
> Does anyone know how I can get NFS working, or if there is some other
> way to remote mount /vservers and get it to work?
>
> TIA
> Darryl