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IPVS/LVS OpenVZ [message #22847] Tue, 06 November 2007 08:22 Go to next message
neotic is currently offline  neotic
Messages: 3
Registered: November 2007
Junior Member
Hi! I've been trying to set up IPVS/LVS (Linux Virtual Server) on OpenVZ without any success.

Let's take it from the beginning.

loadb1 is a separate machine on 192.168.30.139 which is the load balancer.

VPS is the VPS-HOST on 192.168.30.70

WWW1 is a virtual server on VPS-HOST with 192.168.30.242
WWW2 is a virtual server on VPS-HOST with 192.168.30.243
WWW3 is a virtual server on VPS-HOST with 192.168.30.244

192.168.30.245 is the VIRTUAL IP for the loadbalancer, which where ALL web-requests go.

(Every machine is Debian Etch)

First off iproute2 is installed on WWW1/WWW2/WWW3
Then we edit the /etc/sysctl.conf on those machines, adding:

net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.eth0.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.eth0.arp_announce = 2
and sysctl -p of course.

We add the VIRTUAL IP on WWW1/WWW2/WWW3

/etc/network/interfaces:

auto lo:0
iface lo:0 inet static
address 192.168.30.245
netmask 255.255.255.255
pre-up sysctl -p > /dev/null

and bring it up by ifup lo:0

We can se it's set on the machines with
1: lo: <LOOPBACK,UP,10000> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet 192.168.30.245/32 scope global lo:0


And since Venet is kinda fubar we use VETH for these 3 virtual machines.

On the VPS-HOST:
ifconfig venet0 down


vzctl set <VEID-www1> --veth_add eth0,00:0C:29:11:80:9F,veth103,00:0C:29:3D:4E:32--save
vzctl set <VEID-www2> --veth_add eth0,00:0C:29:FE:16:D2,veth104,00:0C:29:15:D9:C7--save
vzctl set <VEID-www3> --veth_add eth0,00:0C:29:8F:1D:2A,veth105,00:0C:29:12:52:3A --save


vzctl set 103(www1) --veth_add veth103.0,00:0C:29:3D:4E:32,eth0,00:0C:29:11:80:9F --save
vzctl set 104(www2) --veth_add veth104.0,00:0C:29:15:D9:C7,eth0,00:0C:29:FE:16:D2 --save
vzctl set 104(www3) --veth_add veth105.0,00:0C:29:12:52:3A,eth0,00:0C:29:8F:1D:2A --save


ifconfig veth103.0 0
ifconfig veth104.0 0
ifconfig veth105.0 0

echo 1 > /proc/sys/net/ipv4/conf/veth103.0/forwarding
echo 1 > /proc/sys/net/ipv4/conf/veth104.0/forwarding
echo 1 > /proc/sys/net/ipv4/conf/veth105.0/forwarding

echo 1 > /proc/sys/net/ipv4/conf/veth103.0/proxy_arp
echo 1 > /proc/sys/net/ipv4/conf/veth104.0/proxy_arp
echo 1 > /proc/sys/net/ipv4/conf/veth105.0/proxy_arp

echo 1 > /proc/sys/net/ipv4/conf/eth0/forwarding
echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp



Now we go into all WWWand issue
ifconfig eth0 0
ip addr add 192.168.30.242 dev eth0
ip route add default dev eth0

(just changing the ip for the different WWW1-3)


And now BACK to the VPS-HOST

ip route add 192.168.30.242 dev veth103.0
ip route add 192.168.30.243 dev veth104.0
ip route add 192.168.30.244 dev veth105.0



The problem NOW is that the VPS-HOST get's all the packets and won't send it to the WWW's.

On the loadbalancer we can see that our WWW's is up and running:

loadb1:~# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.30.245:80 rr
-> 192.168.30.244:80 Route 1 0 0
-> 192.168.30.243:80 Route 1 0 0
-> 192.168.30.242:80 Route 1 0 0


But if we access 192.168.30.245 in our browser we end up at the VPS-HOST and NOT on the WWW1-3


Routes on VPS-HOST:

192.168.30.243 dev veth104.0 scope link
192.168.30.242 dev veth103.0 scope link
192.168.30.244 dev veth105.0 scope link
192.168.30.0/24 dev eth0 proto kernel scope link src 192.168.30.70
default via 192.168.30.1 dev eth0




Routes on the WWW:

default dev eth0 scope link



Any ideas? I'm really going crazy with this one.


Martin

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Re: IPVS/LVS OpenVZ [message #22848 is a reply to message #22847] Tue, 06 November 2007 08:52 Go to previous messageGo to next message
piavlo is currently offline  piavlo
Messages: 159
Registered: January 2007
Senior Member

Get rid of those (disable with 0)
neotic wrote on Tue, 06 November 2007 10:22


echo 1 > /proc/sys/net/ipv4/conf/veth103.0/forwarding
echo 1 > /proc/sys/net/ipv4/conf/veth104.0/forwarding
echo 1 > /proc/sys/net/ipv4/conf/veth105.0/forwarding

echo 1 > /proc/sys/net/ipv4/conf/veth103.0/proxy_arp
echo 1 > /proc/sys/net/ipv4/conf/veth104.0/proxy_arp
echo 1 > /proc/sys/net/ipv4/conf/veth105.0/proxy_arp

echo 1 > /proc/sys/net/ipv4/conf/eth0/forwarding
echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp


and let all veth10X.0 and eth0 be on one bridge device
with transparent bridging.

If i understood correctly you are using LVS-DR
if so you need to take care of arp problem
http://www.linuxvirtualserver.org/docs/arp.html

Did you previously get lvs working without openvz?

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Re: IPVS/LVS OpenVZ [message #22851 is a reply to message #22848] Tue, 06 November 2007 09:08 Go to previous messageGo to next message
neotic is currently offline  neotic
Messages: 3
Registered: November 2007
Junior Member
Which IP do you suggest I use for the bridge?


And yes, I've gotten LVS to work several times before, not on OpenVZ though.


Thanks, Martin

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Re: IPVS/LVS OpenVZ [message #22852 is a reply to message #22851] Tue, 06 November 2007 09:16 Go to previous messageGo to next message
piavlo is currently offline  piavlo
Messages: 159
Registered: January 2007
Senior Member
neotic wrote on Tue, 06 November 2007 11:08

Which IP do you suggest I use for the bridge?

The ip of the HN of course.
But why are you putting all your Vrtual Servers on the same HN?
Do you intend to migrate the VEs between different HNs?

Quote:

And yes, I've gotten LVS to work several times before, not on OpenVZ though.

Just wanted to make shure the prob is OpenVZ related.

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Re: IPVS/LVS OpenVZ [message #22855 is a reply to message #22852] Tue, 06 November 2007 10:36 Go to previous messageGo to next message
neotic is currently offline  neotic
Messages: 3
Registered: November 2007
Junior Member
Adding them to a bridge solved everything.

Thanks!

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Re: IPVS/LVS OpenVZ [message #34970 is a reply to message #22855] Sat, 14 February 2009 10:31 Go to previous messageGo to next message
bbhenry is currently offline  bbhenry
Messages: 17
Registered: February 2009
Junior Member
I know this is an old thread, but I just recently looking into the high availability on OpenVZ. Can you please show me the setting to bridge all the veth with eth0 in one device.
Much appreciated.

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Re: IPVS/LVS OpenVZ [message #35229 is a reply to message #22847] Tue, 10 March 2009 12:41 Go to previous messageGo to next message
Skillshot is currently offline  Skillshot
Messages: 9
Registered: January 2007
Junior Member
I would also be interessted in a complete setup howto for lvs/ldirctord/openvz. I was not able to get it to work with the help of this thread.

Maybe someone could create a howto on the openvz-wiki.

Does someone know if it's possible to run lvs/ldirctord on the hw-node an to balance to two VEs on the same host?

Thx!

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Re: IPVS/LVS OpenVZ [message #41141 is a reply to message #22847] Tue, 30 November 2010 19:57 Go to previous message
cristianm is currently offline  cristianm
Messages: 6
Registered: September 2007
Junior Member
Can any put any how-to with the final setup?

I don´t understand where I put the bridge to finally route.
If I use direct routing with public IP as VIP to local network 10.0.1.X, this works fine if I use a gateway with NAT.

But If I need direct rounting, this don´t work.

Can help me, or build a finally how-to for this?

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