I'm trying to set up both director and realserver on one machine, and run 2
such servers.
Unfortunately, it results in terrible packet storm/looping (200k "repeated"
packets/s) when:
- I start ipvsadm rules on *both* servers,
- LVS connects the client to the other server.
Is it expected? Is there a workaround or something I didn't set?
Settings - server 1:
server1:/# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 209.15.13.253:80 lc
-> 209.15.13.228:80 Local 20 0 0
-> 209.15.13.229:80 Route 20 0 0
eth0 Link encap:Ethernet HWaddr 78:2b:cb:49:75:a7
inet addr:209.15.13.228 Bcast:209.15.13.255 Mask:255.255.255.224
inet6 addr: fe80::7a2b:cbff:fe49:75a7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:565546 errors:0 dropped:0 overruns:0 frame:0
TX packets:565232 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:44152913 (44.1 MB) TX bytes:44132615 (44.1 MB)
Interrupt:36 Memory:da000000-da012800
lo:253 Link encap:Local Loopback
inet addr:209.15.13.253 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:16436 Metric:1
Settings - server 2:
server2:/# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 209.15.13.253:80 lc
-> 209.15.13.228:80 Route 20 0 0
-> 209.15.13.229:80 Local 20 0 0
eth0 Link encap:Ethernet HWaddr 78:2b:cb:4a:d7:1d
inet addr:209.15.13.229 Bcast:209.15.13.255 Mask:255.255.255.224
inet6 addr: fe80::7a2b:cbff:fe4a:d71d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1379119 errors:0 dropped:0 overruns:0 frame:0
TX packets:1378568 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:107695951 (107.6 MB) TX bytes:108057297 (108.0 MB)
Interrupt:36 Memory:da000000-da012800
eth0:u253 Link encap:Ethernet HWaddr 78:2b:cb:4a:d7:1d
inet addr:209.15.13.253 Bcast:209.15.13.253 Mask:255.255.255.255
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:36 Memory:da000000-da012800
lo:253 Link encap:Local Loopback
inet addr:209.15.13.253 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:16436 Metric:1
85.183.95.92 is client IP. It just sends a few packets, which results in
massive amounts of repeated packets (200 kp/s).
21:07:34.048984 IP (tos 0x0, ttl 56, id 58921, offset 0, flags [DF], proto TCP
(6), length 60)
85.183.95.92.37297 > 209.15.13.253.80: Flags [S], cksum 0x5fb3 (correct),
seq 3532512711, win 14520, options [mss 1452,sackOK,TS val 8338414 ecr
0,nop,wscale 7], length 0
21:07:34.048987 IP (tos 0x0, ttl 56, id 58921, offset 0, flags [DF], proto TCP
(6), length 60)
85.183.95.92.37297 > 209.15.13.253.80: Flags [S], cksum 0x5fb3 (correct),
seq 3532512711, win 14520, options [mss 1452,sackOK,TS val 8338414 ecr
0,nop,wscale 7], length 0
21:07:34.049029 IP (tos 0x0, ttl 56, id 58921, offset 0, flags [DF], proto TCP
(6), length 60)
85.183.95.92.37297 > 209.15.13.253.80: Flags [S], cksum 0x5fb3 (correct),
seq 3532512711, win 14520, options [mss 1452,sackOK,TS val 8338414 ecr
0,nop,wscale 7], length 0
21:07:34.049031 IP (tos 0x0, ttl 56, id 58921, offset 0, flags [DF], proto TCP
(6), length 60)
85.183.95.92.37297 > 209.15.13.253.80: Flags [S], cksum 0x5fb3 (correct),
seq 3532512711, win 14520, options [mss 1452,sackOK,TS val 8338414 ecr
0,nop,wscale 7], length 0
21:07:34.049073 IP (tos 0x0, ttl 56, id 58921, offset 0, flags [DF], proto TCP
(6), length 60)
--
Tomasz Chmielewski
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