using haproxy.socket to add new servers.

[Kevin Hunt, Ph.D]

Is this supported? I want to do this when we dynamically add servers in EC2, but I cant find documentation if its really an option with haproxy.
haproxy_add_remove.txt<https://gist.github.com/toddlers/6080314#file-haproxy_add_remove-txt>
Raw<https://gist.github.com/toddlers/6080314/raw/8f2f59d46279a5397cf4890d6737ba366ddda677/haproxy_add_remove.txt>
12345


Adding a serverA ipA:portA to the 'query_backend':

echo "add server query_backend/serverA ipA:portA check inter 3000 rise 2 fall 3 maxconn 50" | socat stdio unix-connect:/var/haproxy.socket



Removing serverA again:

echo "remove server query_backend/serverA" | socat stdio unix-connect:/var/haproxy.socket

Extracted from: https://gist.github.com/toddlers/6080314
------------------------------------
Dr. Kevin H. Hunt - TransWorks
AVP of Infrastructure
Security Officer
dr.kevin.hunt-9QToPCSl4a5Wk0Htik3J/***@public.gmane.org
260-487-4610
260-487-4440 Fax

[Steven Le Roux]

Hi,

no you can't for now.

But what you could do is to add dummy servers (for provisionning) with
dummy addresses that will not match any checks, and then when you have a
new server available as backend, and just change the address by the new one
from the CLI.

According to willy it was on the way, I don't know if it has been pushed
yet. This is a feature that is part of the health-checks ability to watch
for a dns change.

If it's not already done, maybe you could try to contribute it ?

Post by Kevin Hunt, Ph.D
Is this supported? I want to do this when we dynamically add servers in
EC2, but I cant find documentation if its really an option with haproxy.
*haproxy_add_remove.txt*
<https://gist.github.com/toddlers/6080314#file-haproxy_add_remove-txt>
*Raw*
<https://gist.github.com/toddlers/6080314/raw/8f2f59d46279a5397cf4890d6737ba366ddda677/haproxy_add_remove.txt>
12345
echo "add server query_backend/serverA ipA:portA check inter 3000 rise 2 fall 3 maxconn 50" | socat stdio unix-connect:/var/haproxy.socket
echo "remove server query_backend/serverA" | socat stdio unix-connect:/var/haproxy.socket
Extracted from: https://gist.github.com/toddlers/6080314
------------------------------------
Dr. Kevin H. Hunt - TransWorks
AVP of Infrastructure
Security Officer
260-487-4610
260-487-4440 Fax