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Joseph Mack wrote:
>
> On Tue, 5 Feb 2008, andreas2008 wrote:
>
>>> The real server are sending replies, but they seem to
>>> stuck. As said, the problem only occurs with SOAP (I guess, PHP soap
>>> uses an
>>> own socket communication). This special environment makes it difficult
>>> to
>>> search for solutions. Maybe a bug in PHP.
>
>>is the SOAP realserver attempting to connect directly to the
>>client on a different port?
>
No, it cannot. Its default gateway is my LVS. I verified this with tcpdump.
Joseph Mack wrote:
>
>>> I tried running LVS without NAT (direct LVS) and this works fine with
>>> PHP
>>> SOAP. It seems to be a problem concerning NAT and SOAP.
>
>>can you watch for packets from the VIP on the realserver
>>from a high port?
>
No, this is part of the output from tcpdump (1.2.3.4 stands for the external
client IP, 5.6.7.8 is the virtual IP, 172.16.10.3 is the internal IP of the
LV, 172.16.10.4 is the real server IP.
LVS:
LVS:
23:27:42.731727 IP 1.2.3.4.49195 > 5.6.7.8.80: . ack 1 win 65535
<nop,nop,timestamp 296192392 32339>
23:27:42.731742 IP 1.2.3.4.49195 > 172.16.10.4.80: . ack 1 win 65535
<nop,nop,timestamp 296192392 32339>
23:27:42.795114 IP 1.2.3.4.49195 > 5.6.7.8.80: P 1:278(277) ack 1 win 65535
<nop,nop,timestamp 296192392 32339>
23:27:42.795135 IP 1.2.3.4.49195 > 172.16.10.4.80: P 1:278(277) ack 1 win
65535 <nop,nop,timestamp 296192392 32339>
23:27:42.795253 IP 172.16.10.4.80 > 1.2.3.4.49195: . ack 278 win 54
<nop,nop,timestamp 32355 296192392>
23:27:42.795267 IP 5.6.7.8.80 > 1.2.3.4.49195: . ack 278 win 54
<nop,nop,timestamp 32355 296192392>
23:27:42.879017 IP 1.2.3.4.49195 > 5.6.7.8.80: P 278:879(601) ack 1 win
65535 <nop,nop,timestamp 296192392 32339>
23:27:42.879036 IP 1.2.3.4.49195 > 172.16.10.4.80: P 278:879(601) ack 1 win
65535 <nop,nop,timestamp 296192392 32339>
23:27:42.879151 IP 172.16.10.4.80 > 1.2.3.4.49195: . ack 879 win 64
<nop,nop,timestamp 32364 296192392>
23:27:42.879163 IP 5.6.7.8.80 > 1.2.3.4.49195: . ack 879 win 64
<nop,nop,timestamp 32364 296192392>
RS:
23:27:56.961162 IP 172.16.10.4.80 > 172.16.10.3.46834: S
1688754264:1688754264(0) ack 2974145981 win 5792 <mss 1460,sackOK,timestamp
33773 152372400,nop,wscale 7>
23:27:56.961279 IP 172.16.10.3.46834 > 172.16.10.4.80: . ack 1 win 46
<nop,nop,timestamp 152372400 33773>
23:27:56.961915 IP 172.16.10.3.46834 > 172.16.10.4.80: P 1:116(115) ack 1
win 46 <nop,nop,timestamp 152372400 33773>
23:27:56.961940 IP 172.16.10.4.80 > 172.16.10.3.46834: . ack 116 win 46
<nop,nop,timestamp 33773 152372400>
23:27:56.962459 IP 172.16.10.4.80 > 172.16.10.3.46834: P 1:980(979) ack 116
win 46 <nop,nop,timestamp 33773 152372400>
23:27:56.962515 IP 172.16.10.4.80 > 172.16.10.3.46834: F 980:980(0) ack 116
win 46 <nop,nop,timestamp 33773 152372400>
23:27:56.962594 IP 172.16.10.3.46834 > 172.16.10.4.80: . ack 980 win 61
<nop,nop,timestamp 152372401 33773>
23:27:56.964290 IP 172.16.10.3.46834 > 172.16.10.4.80: F 116:116(0) ack 981
win 61 <nop,nop,timestamp 152372401 33773>
23:27:56.964302 IP 172.16.10.4.80 > 172.16.10.3.46834: . ack 117 win 46
<nop,nop,timestamp 33773 152372401>
Andreas
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