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Hi All,
We have been running it with LVS-RD for a year, but when i add a
new real server , the new real server not work. while the other real
server works fine.
The problem is The real server can receive the package from LVS,
but the nginx
installed on the real server never received the package.
The real server:
admin@speed:~$ uname -a
Linux speed 2.6.35-22-server #35-Ubuntu SMP Sat Oct 16 22:02:33 UTC
2010 x86_64 GNU/Linux
It has two ports, eth0 and eth1. The two cards talk to two
networks, one starting with 66. and going to the outside and the other
192. and going to the inside. the VIP is 66.63.253.120 and
67.249.117.56. Here is the result of ifconfig:
admin@speed:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1e:c9:ba:20:41
inet addr:66.63.253.88 Bcast:66.63.253.127 Mask:255.255.255.192
inet6 addr: fe80::21e:c9ff:feba:2041/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:94896 errors:0 dropped:0 overruns:0 frame:0
TX packets:20648 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:10900353 (10.9 MB) TX bytes:4580223 (4.5 MB)
Interrupt:16 Memory:f8000000-f8012800
eth0:1 Link encap:Ethernet HWaddr 00:1e:c9:ba:20:41
inet addr:67.249.117.24 Bcast:67.249.117.63 Mask:255.255.255.192
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:16 Memory:f8000000-f8012800
eth1 Link encap:Ethernet HWaddr 00:1e:c9:ba:20:43
inet addr:192.168.16.88 Bcast:192.168.16.255 Mask:255.255.255.0
inet6 addr: fe80::21e:c9ff:feba:2043/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:126534 errors:0 dropped:0 overruns:0 frame:0
TX packets:56944 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:28644545 (28.6 MB) TX bytes:5306425 (5.3 MB)
Interrupt:16 Memory:f4000000-f4012800
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:680 errors:0 dropped:0 overruns:0 frame:0
TX packets:680 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:74461 (74.4 KB) TX bytes:74461 (74.4 KB)
lo:0 Link encap:Local Loopback
inet addr:66.63.253.120 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:16436 Metric:1
lo:1 Link encap:Local Loopback
inet addr:67.249.117.56 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:16436 Metric:1
I have dumped the package on the real server port eth1, when i access
http://66.63.253.120 :
admin@speed:~$ sudo tcpdump -i eth1 dst host 66.63.253.120 -e
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes
10:37:19.438541 00:22:19:4f:64:70 (oui Unknown) > 00:1e:c9:ba:20:43
(oui Unknown), ethertype IPv4 (0x0800), length 66: 126.89.61.122.54459
> 66.63.253.120.www: Flags [S], seq 3247425561, win 8192, options [mss
1460,nop,wscale 2,nop,nop,sackOK], length 0
10:37:22.437969 00:22:19:4f:64:70 (oui Unknown) > 00:1e:c9:ba:20:43
(oui Unknown), ethertype IPv4 (0x0800), length 66: 126.89.61.122.54459
> 66.63.253.120.www: Flags [S], seq 3247425561, win 8192, options [mss
1460,nop,wscale 2,nop,nop,sackOK], length 0
10:37:28.442390 00:22:19:4f:64:70 (oui Unknown) > 00:1e:c9:ba:20:43
(oui Unknown), ethertype IPv4 (0x0800), length 62: 126.89.61.122.54459
> 66.63.253.120.www: Flags [S], seq 3247425561, win 8192, options [mss
1460,nop,nop,sackOK], length 0
^C
3 packets captured
3 packets received by filter
0 packets dropped by kernel
The following is the real server setup scritps:
VIP1=66.63.253.120
VIP2=67.249.117.56
/sbin/ifconfig lo:0 $VIP1 broadcast $VIP1 netmask 255.255.255.255 up
/sbin/route add -host $VIP1 dev lo:0
/sbin/ifconfig lo:1 $VIP2 broadcast $VIP2 netmask 255.255.255.255 up
/sbin/route add -host $VIP2 dev lo:1
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
/sbin/sysctl -p >/dev/null 2>&1
AND the route table:
admin@speed:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
66.249.117.56 * 255.255.255.255 UH 0 0 0 lo
66.63.253.120 * 255.255.255.255 UH 0 0 0 lo
66.249.117.0 * 255.255.255.192 U 0 0 0 eth0
localnet * 255.255.255.192 U 0 0 0 eth0
192.168.16.0 * 255.255.255.0 U 0 0 0 eth1
default 66.63.253.65 0.0.0.0 UG 100 0 0 eth0
when i access http://66.63.253.88 , it works fine.
Any ideas?
Best Regards.
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