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In AWS, I am trying to get the keepalived/ipvs working and see that the
load balancer/director does not forward the requests to my real server
ubuntu@ip-172-31-6-2:~$ cat /etc/keepalived/keepalived.conf
global_defs {
notification_email {
test@xxxxxxxx
}
}
virtual_server 13.57.18.235 1935 {
delay_loop 30
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 172.31.12.15 1935 {
TCP_CHECK {
connect_port 1935
connect_timeout 3
}
}
}
vrrp_instance v1 {
state MASTER
interface eth0
lvs_sync_daemon_interface eth0
virtual_router_id 51
priority 150
advert_int 1
virtual_ipaddress {
13.57.18.235
}
}
ubuntu@ip-172-31-6-2:~$ sudo ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 13.57.18.235:1935 rr persistent 50
-> 172.31.12.15:1935 Route 1 0 0
loopback on real
ubuntu@ip-172-31-12-15:~$ ifconfig lo:0
lo:0 Link encap:Local Loopback
inet addr:13.57.18.235 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
When i run tcpdump on both the loadbalancer and real see that tcp reset
happens on the loadbalancer after sync and reset happens after the
handshake on the real
tcpdump on loadbalancer
03:50:35.405489 IP (tos 0x0, ttl 51, id 59005, offset 0, flags [DF],
proto TCP (6), length 64)
c-98-207-84-68.hsd1.ca.comcast.net.51279 >
ip-172-31-6-2.us-west-1.compute.internal.1935: Flags [S], cksum 0x4e32
(correct), seq 2162214371, win 65535, options [mss 1460,nop,wscale
5,nop,nop,TS val 373641902 ecr 0,sackOK,eol], length 0
E..@.}@.3...b.TD.....O..............N2.............
.ER.........
03:50:35.405531 IP (tos 0x0, ttl 64, id 46103, offset 0, flags [DF],
proto TCP (6), length 40)
ip-172-31-6-2.us-west-1.compute.internal.1935 >
c-98-207-84-68.hsd1.ca.comcast.net.51279: Flags [R.], cksum 0x2ff8
(correct), seq 0, ack 1, win 0, length 0
E..(..@.@.......b.TD...O........P.../...
tcpdump on real
ip-172-31-6-2.us-west-1.compute.internal.44230 >
ip-172-31-12-15.us-west-1.compute.internal.1935: Flags [S], cksum 0x9ef2
(correct), seq 2759878464, win 26883, options [mss 8961,sackOK,TS val
2324983234 ecr 0,nop,wscale 7], length 0
E..<.v@.@.?...............g@......i.......#....
..m.........
03:51:52.362958 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto
TCP (6), length 60)
ip-172-31-12-15.us-west-1.compute.internal.1935 >
ip-172-31-6-2.us-west-1.compute.internal.44230: Flags [S.], cksum 0x6a7e
(incorrect -> 0x7528), seq 527723804, ack 2759878465, win 26847, options
[mss 8961,sackOK,TS val 156996593 ecr 2324983234,nop,wscale 7], length 0
E..<..@.@..l.............tm...gA..h.j~....#....
[....m.....
ip-172-31-6-2.us-west-1.compute.internal.44230 >
ip-172-31-12-15.us-west-1.compute.internal.1935: Flags [.], cksum 0x294e
(correct), seq 1, ack 1, win 211, options [nop,nop,TS val 2324983234 ecr
156996593], length 0
E..4.w@.@.?...............gA.tm.....)N.....
..m. [..
03:51:52.363391 IP (tos 0x0, ttl 64, id 36984, offset 0, flags [DF],
proto TCP (6), length 52)
ip-172-31-6-2.us-west-1.compute.internal.44230 >
ip-172-31-12-15.us-west-1.compute.internal.1935: Flags [R.], cksum 0x294a
(correct), seq 1, ack 1, win 211, options [nop,nop,TS val 2324983234 ecr
156996593], length 0
E..4.x@.@.?...............gA.tm.....)J.....
..m. [..
Let me know if i am missing anything here
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