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Hello,
I am trying to setup a two-nic-two-network single director lvs_nat using
telnet as directed in the howto/mini-howto, but have a problem I can't seem
to resolve. I'll give you the problem up front, then supply info.
Problem: telnet only works from CIP to VIP when I add my default route back
to the director box after it is removed by the configure script.
ipvsadm is:
[root@devlvsn01 configure-lvs_0.9.2]# ipvsadm --v
ipvsadm v1.19 2001/08/27 (compiled with getopt_long and IPVS v0.9.3)
director is:
[root@devlvsn01 configure-lvs_0.9.2]# uname -a
Linux devlvsn01.brierley.com 2.4.8-26mdk #1 Sun Sep 23 17:06:39 CEST 2001
i686 unknown
N.B. - this is Mandrake 8.1, which comes pre-compiled with ip_vs and
suppplies ipvsadm.
realserver is:
Win2K, SP2. RIP's defgw is the DIP. I used the '254' interface metric trick
on the MS loopback adapter, which has the VIP assigned to it with a /24
mask.
# #############################################
________
| |
| client |
|________|
CIP=eth0 192.168.12.47/24
|
|
VIP=eth0:2236 192.168.22.36/32
__________
| |
| director |
|__________|
DIP=eth1 192.168.200.37/24
|
|
|
-------------------
|
|
RIP1=eth0
192.168.200.39/24
______________
| |
| realserver1 |
|______________|
# #############################################
ip_forwarding is on:
[root@devlvsn01 configure-lvs_0.9.2]# cat /proc/sys/net/ipv4/ip_forward
1
# #############################################
netstat -rn *BEFORE* I run the configure script:
[root@devlvsn01 configure-lvs_0.9.2]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt
Iface
192.168.22.0 0.0.0.0 255.255.255.0 U 40 0 0
eth0
192.168.200.0 0.0.0.0 255.255.255.0 U 40 0 0
eth1
127.0.0.0 0.0.0.0 255.0.0.0 U 40 0 0 lo
0.0.0.0 192.168.22.1 0.0.0.0 UG 40 0 0
eth0
# #############################################
contents of bp.conf, my comment-less copy of
lvs_nat.conf.two_NIC_two_network:
[root@devlvsn01 configure-lvs_0.9.2]# cat bp.conf
#----------lvs_nat.conf------------------------------------
LVSCONF_FORMAT=1.1
LVS_TYPE=VS_NAT
INITIAL_STATE=on
CLEAR_IPVS_TABLES=yes
VIP=eth0:2236 192.168.22.36 255.255.255.255 192.168.22.236
DIP=eth1 192.168.200.37 192.168.200.0 255.255.255.0 192.168.200.255
DIRECTOR_GW=192.168.22.1
SERVICE=t telnet rr 192.168.200.39:23
SERVER_NET_DEVICE=eth0
#----------end lvs_nat.conf---------------------------------
# #############################################
netstat -rn *AFTER* running configure script:
[root@devlvsn01 configure-lvs_0.9.2]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt
Iface
192.168.22.36 0.0.0.0 255.255.255.255 UH 40 0 0
eth0
192.168.22.0 0.0.0.0 255.255.255.0 U 40 0 0
eth0
192.168.200.0 0.0.0.0 255.255.255.0 U 40 0 0
eth1
127.0.0.0 0.0.0.0 255.0.0.0 U 40 0 0 lo
# #############################################
As expected, I see the VIP has been added. The default gw is now gone...
I cannot telnet from the CIP to the VIP, nor can I ping the VIP. If I go to
the director and add the default route back ('route add default gw
192.168.22.1'), I can ping the VIP and telnet works (I get a banner and I
see an incremented Active Connections in ipvsadm).
Am I supposed to add back the default route, or is that the wrong thing to
do? Do I have some other problem that I'm not seeing? I've read & re-read
the howto & mini-howto, searched the list archives, and gone over & over my
environment. I'm embarrassed to say I can't figure out what's supposed to
be the simplest install.
Thanks in advance!
Dennis McGuire
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