Hi, This is with respect to an in-house application named Trackwizz that has been configured to use HA Proxy as a load balancer. This API uses a Virtual IP 10.250.2.127 configured on port 54322 on the HA Proxy server. Since Friday, the API does not respond when accessed using the following: ht…

Hey, Can you let us know what troubleshooting actions did you run?

Hi Baptiste, This is a production setup so we did not have the time to perform any troubleshooting. We just restarted the haproxy service on the server on both occasions. Post this, the application team claim that they were able to access the API configured on 10.250.2.127:54322. Can you let us …

Well, the first test I would have run would have been accessing the IP address directly. This issue does not make any sense at all to me, unless the IP address pointed to by your hostname can change in the DNS or not be resolved anymore. HAProxy does not care if the traffic comes via the IP addres…

Hi, The HA proxy service is running on two RHEL 7.4 servers, where the virtual IP 10.250.2.127 is configured. The primary node has a boot IP of 10.250.2.144 and the secondary node has a boot IP of 10.250.2.145 Currently all requests are being proxied via 2.144. There are 4 frontends configured…

Ok thx for the info. so no docker, no VM, just bare metal installation? If the problem occur again, please just tcpdump the traffic on this port for a few seconds and run a ‘sudo ss -lpten | fgrep 54322’ to check if the port is still bound. Do you have the HAProxy log lines from the latest incide…

Hi Baptiste, The 2 Linux servers on which HA proxy is installed are VM servers based on an ESXI host. I will provide the logs from when the issue last occurred Shortly.

Oct 30 09:07:21 EDEMUMHAPRXY01 haproxy[27486]: 10.250.0.41:50997 [30/Oct/2019:09:06:51.794] thirdpoint trackwizz_3/server1 1/0/30007 25 sD 0/0/0/0/0 0/0 Oct 30 09:09:31 EDEMUMHAPRXY01 haproxy[27486]: 10.215.0.99:58571 [30/Oct/2019:09:09:31.539] firstpoint trackwizz/server1 1/0/9 0 SD 6/6/6/6/0 0/0 …

Hi, Can someone help out wrt this issue?

Please provide all informations requested by Baptiste, as well as the configuration and the output of haproxy -vv.

1.) This is the output of tcpdump.pcap, obtained by running tcpdump for a few seconds on the command line: 13:15:14.464187 IP EDEMUMHAPRXY01.47916 > edemumkycapp002.edelcap.com.54322: Flags [S], seq 2382711238, win 29200, options [mss 1460,sackOK,TS val 271645500 ecr 0,nop,wscale 7], length 0 13:1…

API accessed using DNS hostname stops responding

Help!

Skinnyguinea November 8, 2019, 8:00am 12

Lukas,

With reference to the information provided, do you have anything that could help us?

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API accessed using DNS hostname stops responding

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