|
Main goal: LVS-TUN *OR* LVS-DR (I have tried both unsucesfully) for
http service.
Problem: Random success and failure... probably ARP problem, right?
Environment: Red Hat 7.2, Piranha 0.6.0-15, RH stock kernel (2.4.7-10)
________
| |
| client |
|________|
CIP=100.146.4.39
|
|
|
__________
| |
| Internet |
|__________|
|
|
|
VIP=x.x.x.48 (eth0:1)
__________
| |
| director |
|__________|
DIP=x.x.x.54 (eth0)
|
|
/---------------------------------\
| | |
| | |
RIP1=x.x.x.44 N/A (yet) N/A (yet)
_____________ _____________ _____________
| | | | | |
| realserver | | realserver | | realserver |
|_____________| |_____________| |_____________|
###############
## COMMENTARY:
###############
I have tried so many things to get this cluster working, I think I could
write the book... on 2.0 and 2.2 kernels anyway. 2.4 seems to be such a
different beast that I haven't been able to get it working. If there is
more information I can provide, or anything I can do that might help
solicit a response on this issue, please tell me. Perhaps the fact that
I'm using RH 7.2 is the issue?
The docs do not seem to have much information regarding 2.4.x kernels
and the new 'ip addr' or 'iptables' commands. What is the correct way
to setup Red Hat 7.2 (or any 2.4.x) system for LVS-DR (or LVS-TUN, I'm
not picky), including the ARP problem?
I have tried all of the following unsuccessfully:
# Another way to avoid the ARP problem
insmod ipchains
ipchains -A input -j REDIRECT 80 -d 63.145.198.48 80 -p tcp
echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter
echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_filter
echo 1 > /proc/sys/net/ipv4/conf/eth1/arp_filter
# Insert the ipip module
insmod ipip
# Make the tunl0 device up
ifconfig tunl0 up
# Start the hiding interface functionality
echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter
# Hide all addresses for this tunnel device
echo 1 > /proc/sys/net/ipv4/conf/tunl0/arp_filter
# Configure a VIP on an alias of tunnel device
ifconfig tunl0:0 63.145.198.48 up
###############
## DETAILS:
###############
Setup the Director:
Install Piranha, lvsadm
Configure like so:
serial_no = 38
primary = x.145.198.54
service = lvs
backup = 0.0.0.0
heartbeat = 1
heartbeat_port = 539
keepalive = 6
deadtime = 18
network = direct
reservation_conflict_action = preempt
debug_level = NONE
virtual http {
active = 1
address = x.145.198.53 eth1
port = 80
send = "GET / HTTP/1.0\r\n\r\n"
expect = "HTTP"
load_monitor = none
scheduler = wlc
protocol = tcp
timeout = 6
reentry = 15
quiesce_server = 0
server www4real {
address = x.145.198.44
active = 1
weight = 1
}
}
IP Virtual Server version 0.8.1 (size=65536)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP x.145.198.48:80 rr
-> x.145.198.52:80 Route 1 0 0
-> x.145.198.44:80 Route 1 0 0
CURRENT LVS PROCESSES
root 1992 0.0 0.0 1604 600 ? S 15:45 0:00 pulse
root 2295 0.0 0.0 1604 600 ? S 15:45 0:00
/usr/sbin/lvs --nofork -c /etc/sysconfig/ha/lvs.cf
root 2299 0.0 0.0 1640 648 ? S 15:45 0:00
/usr/sbin/nanny -c -h x.145.198.44 -p 80 -s GET / HTTP/1.0\r\n\r\n -
root 2300 0.0 0.0 1640 648 ? S 15:45 0:00
/usr/sbin/nanny -c -h x.145.198.52 -p 80 -s GET / HTTP/1.0\r\n\r\n -
Thank you.
+---------------------------------------------------
| Dan Browning, Sr. Tech Consultant
| Kavod Technologies, 1498 SE Tech Center Pl Ste 170
| Vancouver, WA 98683 <dan.browning@xxxxxxxxx>
+---------------------------------------------------
Senate, n.:
A body of elderly gentlemen charged with high duties and
misdemeanors.
-- Ambrose Bierce
|
