Is it possible to delay the FrontEnd binding until the back ends have had time to do health checks and rise?
Scenario: I use multiple HAProxy nodes with multiple A records. eg: foo.example.com resolves to a.b.c.d and a.b.c.z If the first machine goes down, most browsers happily move along to a different IP if the first IP fails to respond to port 80. However, I think I am seeing when I recover the original host, it will briefly send 503s when it has bound to port 80 on the frontend, but hasn't connected all the back ends. Thus I'm looking for a mechanism to delay the binding on the FrontEnd for a small timewindow. (ideally I would set this window to just above my 'RISE' thresholds for backend health checks) I was looking for this in the config, but couldn't find it. Do other people see this problem? I imagine I could hack together a gatekeeper using iptables, but I feel like it might be a nice feature for HAProxy. --J
