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I am using ultramonkey and am having an issue loadbalancing smtp (see
config below). I am unable to send emails that are larger than a
certain size. I havn't determined what the threshold is but if the
email is small it sends through the VIP fine, if the email is large the
email client times-out during the "data" smtp transaction. Sending
directly to the smtp real server works fine for large emails.
ldirectord.cf:
# Global Directives
checktimeout=10
checkinterval=2
#fallback=127.0.0.1:80
autoreload=no
#logfile="/var/log/ldirectord.log"
logfile="local0"
quiescent=yes
virtual=10.45.1.160:25
# fallback=127.0.0.1:25
real=10.25.19.61:25 ipip
real=10.25.19.62:25 ipip
real=10.25.19.63:25 ipip
real=10.25.19.64:25 ipip
real=10.25.19.65:25 ipip
real=10.25.19.66:25 ipip
service=smtp
scheduler=rr
#persistent=600
protocol=tcp
checktype=negotiate
Real Server Config:
I'm using arptables to hide the vip ip on tunl0
systcl.conf:
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
[root@mail03 root]# arptables --list
Chain IN (policy ACCEPT)
target source-ip destination-ip source-hw
destination-hw hlen op hrd pro
DROP anywhere 10.45.1.160 anywhere anywhere
any any any any
Chain OUT (policy ACCEPT)
target source-ip destination-ip source-hw
destination-hw hlen op hrd pro
[root@mail03 root]# ifconfig (truncated for tunl0 only)
tunl0 Link encap:IPIP Tunnel HWaddr
inet addr:10.45.1.160 Mask:255.255.255.255
UP RUNNING NOARP MTU:1480 Metric:1
RX packets:148 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:84 dropped:0 overruns:0 carrier:0
collisions:84 txqueuelen:0
RX bytes:15700 (15.3 Kb) TX bytes:0 (0.0 b)
--
Joel Nimety
Perimeter Internetworking Corp.
203.541.3416
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