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Hello All,
Being a newbie to LVS we beat our heads against the wall last week and have
a psuedo working setup. Here is a hopefully brief description of our setup.
Director - RHEL with ipvsadm-1.21-9.ipvs108, 2 nics with both on a "real"
network, but one is dedicated to the network that the realservers are attached.
Here is my setup file:
cat /proc/sys/net/ipv4/ip_forward
echo "0" > /proc/sys/net/ipv4/ip_forward
#director is not gw for realservers: leave icmp redirects on
echo 'setting icmp redirects (1 on, 0 off) '
echo "1" >/proc/sys/net/ipv4/conf/all/send_redirects
cat /proc/sys/net/ipv4/conf/all/send_redirects
echo "1" >/proc/sys/net/ipv4/conf/default/send_redirects
cat /proc/sys/net/ipv4/conf/default/send_redirects
echo "1" >/proc/sys/net/ipv4/conf/eth0/send_redirects
cat /proc/sys/net/ipv4/conf/eth0/send_redirects
#add ethernet device and routing for VIP 192.168.1.110
/sbin/ifconfig eth1
#check VIP 192.168.1.110 is reachable from self (director)
/bin/ping -c 1 137.201.81.110
/bin/netstat -rn
#setup_ipvsadm_table
#clear ipvsadm table
/sbin/ipvsadm -C
#installing LVS services with ipvsadm
#add telnet to VIP with round robin scheduling
#/sbin/ipvsadm -A -t 137.201.81.110:telnet -s rr
/sbin/ipvsadm -A -t 137.201.81.110:http -s rr
#forward telnet to realserver using direct routing with weight 1
#/sbin/ipvsadm -a -t 137.201.81.110:telnet -r 137.201.81.230 -g -w 1
#/sbin/ipvsadm -a -t 137.201.81.110:telnet -r 137.201.81.44 -g -w 1
/sbin/ipvsadm -a -t 137.201.81.110:http -r 137.201.81.230 -g -w 1
/sbin/ipvsadm -a -t 137.201.81.110:http -r 137.201.81.44 -g -w 1
#check realserver reachable from director
ping -c 1 137.201.81.230
ping -c 1 137.201.81.44
#displaying ipvsadm settings
/sbin/ipvsadm
Here's the issue. The real servers don't ping, but when I try to go to them via
a browser, it works like a charm, unless I try to hit them multiple times.
After about 4 refreshs' in a row, the site becomes unreachable. We need to get
this to work consitently, obviously and try to understand it a little more.
Originally when I just configured the lo interface on the clients, it wouldn't
work at all, now I setup eth0:110 with the VIP and it seems to work......Any
help would be appreciated.
Thanks
Scott
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