On Tue, Jun 2, 2015 at 6:36 PM, N P <nvn...@yahoo.ca> wrote: > Hi, > > I want to send two transactions with different weights to different servers. > I have done this using frontend, backend, and ACL as can be seen from the > below config. > The other requirement is to also use leastconn balancing. > > The problem is that in this setting, leastconn applies within each backend > and the selected server is not essentially the GLOBAL least loaded server in > total (maybe due to a bug in the system). Note that, same servers are used > in the backends with different weights. > From what I understood from the code, the problem seems to be that each > backend tracks the number of connection of its own servers separately. > Therefore, although a server is overloaded in one backend, the other backend > might think that it is completely free. > > > My requirement is to forward requests to different servers with different > weights, but select the least loaded server in total. I checked Haproxy code > to see what I need to change, but could not figure it out. I am not very > familiar with HAProxy code and structure. I wonder if there is an easy > solution to do this, or if some one can help me with some directions to do > this; either to config HAProxydifferently or to change its code to address > my requirement. > Any help is appreciated. > > > My setting is: > > backend BK1 > balance leastconn > server web1 000.000.000.000:00 weight W1 > server web2 111.111.111.111:11 weight W2 > > backend BK2 > balance leastconn > server web1 000.000.000.000:00 weight W3 > server web2 111.111.111.111:11 weight W4 > > > frontend http > bind *:80 > mode http > acl myACL url_beg /MYURL > use_backend BK1 if myACL > default_backend BK2
Hi, Your health checks should be able to report an overloaded server, or better, using the agent-check for this purpose. Baptiste
