From: Frank Crowder (frank.crowder_at_datastream.net)
Date: Tue 28 Jun 2005 - 20:17:54 BST
Your crystal ball is intact. Vserver names were dmain1, dmain2, and dmain3. Server name was dmain.
ifconfig yields eth0:dmai with the correct ip addresses for dmain, dmain2 and dmain3. Changing the vserver names to vs01, vs02, vs03 corrected the problem.
Many thanks,
Frank Crowder
On Tue, 28 Jun 2005 00:13:14 +0200 Björn rSteinbrink wrote
From: Bj?rn Steinbrink <B.Steinbrink_at_gmx.de>
Subject: Re: [Vserver] can not ping 1st vserver when 3 vservers exist.
To: vserver_at_list.linux-vserver.org
Message-ID: <20050627221314.GA15145_at_doener.homenet>
Content-Type: text/plain; charset=iso-8859-1
Hi,
On 2005.06.27 17:40:17 -0400, Frank Crowder wrote:
> I have 3 vservers. I can ping vserver 2 and 3, but not vserver 1. If I
> restart vserver1, I can ping vserver1 and vserver3. Any suggestions
> are very appreciated.
I guess you're hitting the primary/secondary network issue, but as you didn't provide much information (kernel/tools version, network configuration of the vservers) and my crystal ball is broken, I can't tell anything else ;)
For the primary/secondary stuff:
In Linux, for each subnet there is one primary address. If this address is removed, all secondaries are removed, too. Example, I assume that there are no addresses from 10.0.0.0/8 configured
yet:
ifconfig eth0:0 10.0.0.1 <-- becomes primary
ifconfig eth0:1 10.0.0.2 <-- becomes secondary
ifconfig eth0:2 10.0.0.3 <-- becomes secondary
ifconfig eth0:3 10.0.0.4 <-- becomes secondary
ifconfig eth0:2 down --- eth0:2 is gone now
ifconfig eht0:0 down --- eth0:0 _and_ eth0:1 and eth0:3 are gone now
So if you have addresses from the same subnet in different vservers, and of the vservers 'owns' the primary address, stopping/restarting that vserver will causes the other vserver to lose their addresses.
Work-Arounds:
Either reserve an ip address in the used subnets that is statically configured on the host and being the primary one (i.e. the first address from that subnet), so the primary address will never be removed. Or use /32 addresses, that way, the subnet contains only a single address and thus there can't be any secondaries.
HTH
Björn
_______________________________________________
Vserver mailing list
Vserver_at_list.linux-vserver.org
http://list.linux-vserver.org/mailman/listinfo/vserver