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Hello,
having promised ages ago to try this and never finding anything but
failures when googling for it, here is how I've done it. This is done in
LVS-DR mode, which is the most efficient one but also tends to be the most
tricky one. LVS-TUN and NAT are left as exercises for the reader. ^o^
The basics, though I'm relative sure that any 2.3 Vserver would have
worked:
Kernel : 2.6.33.2-vs2.3.0.36.30.4
HostOS : Debian Squeeze (meaning util-vserver 0.30.216-pre2864-1)
GuestOS : Debian Lenny
LVSOS : Debian Squeeze
On the LVS server (really a HA cluster, but who's counting) a typical
ldirectord/ipvsadmin config:
---
# Global Directives
checktimeout=10
checkinterval=2
autoreload=yes
#logfile="local0"
quiescent=yes
# Virtual Server for HTTP
virtual=10.10.0.88:80
# fallback=127.0.0.1:80
real=10.10.0.32:80 gate
real=10.10.0.33:80 gate
service=http
# request="index.html"
# receive="Test Page"
# persistent = 600
scheduler=sh
protocol=tcp
checktype=connect
emailalertfreq=600
emailalert=root
---
On the Vserver hosts (just one with 2 guests on would of course work as
well but make a lot less sense ^_^) the typical sysctl modifications to
prevent ARP disasters (would go into /etc/sysctl.d/lvs-dr.conf for example):
---
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.eth0.arp_ignore = 1
net.ipv4.conf.eth1.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.eth0.arp_announce = 2
net.ipv4.conf.eth1.arp_announce = 2
---
And yes, this was on the host. And got exported automagically to the guest.
Not sure if and how namespaces might break this in the future.
Finally in the vserver configs for each of the 2 "real" (ahahahah, lovely
clash of LVS and Vserver terminology) servers an additional interface for
the "virtual" IP of the LVS, in this case:
File Contents
/etc/vservers/guest1/interfaces/1/dev lo
/etc/vservers/guest1/interfaces/1/ip 10.10.0.88
/etc/vservers/guest1/interfaces/1/prefix 32
That's it. Rather more straightforward and successful than I expected it
to be.
Regards,
Christian
--
Christian Balzer Network/Systems Engineer
chibi@xxxxxxx Global OnLine Japan/Fusion Communications
http://www.gol.com/
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