On Fri, Oct 30, 2009 at 03:18:39PM +0100, Gerhard Mehsel wrote:
> Hello,
> I just set up a Debian Lenny Vserver and tried to customize my
please avoid the 2.6.26 kernels, they are known-to-be-broken
> network. My Problem is, that I configured 3 network devs, but now
> inside the vserver appear five devices?
that sounds interesting, but surely the host has more than
3 network devices configured, yes?
> Is there a small tutorial what to set to get 2 IP adresses and a
> loopback device inside a verserver guest?
simply assign them to the guest (via config) and be done
> Do the devices have to be configured in the host, also?
yes, Linux-VServer uses IP isolation not network virtualization,
so all the network setup happens on the host, the guest is
just assigned a subset of the available IPs which it then
can use to bind to ...
> On the host system I have mutliple IP Adresses on one device
> with some aliases:
that's fine, although aliases are not required nowadays
> /etc/network/interfaces:
>
> eth0
> ....
> eth0:0
> ....
> eth0:1
> ....
> eth0:2
> ....
> eth0:3
> ....
> eth0:4
> ....
> in /etc/vservers/$VSERVER/interfaces/{0 1 2}
> 0/dev: eth0
> 1/dev: eth0:1
~~~~~~ that's wrong, the device is still eth0
> 2/dev: lo
~~~ that's usually wrong too, unless you really
want util-vserver to create IPs on lo
note: specifying a dev entry means that util-vserver
will add that IP (on the host) to the given device
on guest startup
> 0/ip: 192.168.1.10
> 1/ip: 192.168.1.11
> 2/ip: 127.0.0.1
you usually do not specify 127.0.0.1 for a guest,
unless you exactly know what you are doing :)
you are also missing the netmask/prefix for your
interfaces ...
> After booting the vserver guest ifconfig displays 5 devices:
> -----------------------------------------
>
> eth0 Link encap:Ethernet HWaddr xxxx
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:858628 errors:0 dropped:0 overruns:0 frame:0
> TX packets:1302041 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:220101426 (209.9 MiB) TX bytes:1809823317 (1.6 GiB)
> Interrupt:19 Base address:0xa400
>
> eth0:0 Link encap:Ethernet HWaddr xxxx
> inet addr:192.168.1.10 ...
>
> eth0:1 Link encap:Ethernet HWaddr xxxx
> inet addr:192.168.1.11 ...
>
> eth0:3 Link encap:Ethernet HWaddr xxxx
> inet addr:192.168.1.10 ...
>
> eth0:4 Link encap:Ethernet HWaddr xxxx
> inet addr:192.168.1.11 ...
which is not surprising, as you add the already
existing IPs again with the wrong netmask
(the part you removed :)
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:5669 errors:0 dropped:0 overruns:0 frame:0
> TX packets:5669 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:1482322 (1.4 MiB) TX bytes:1482322 (1.4 MiB)
> --------------------------------------------------------
> Is this a mixture between the configured devices from Host and Guest
> system?
no, it is actually all interfaces (from the host)
carrying an IP 'given' to the guest
> How do I do this correctly?
either let util-vserver configure the guest IPs
on the host (dev entry) or put a 'nodev' entry
in the config, so that the guest uses the pre-
configured IPs
best,
Herbert
> Thanks a lot,
> Gerd
Received on Fri Oct 30 17:53:23 2009