I need to perform HTTP healthcheck on individual backend servers and load balance among active backend servers.This works fine with single backend server when we mention host name in httpchk (option httpchk GET /info HTTP/1.1 Host:\ abc.mysrv1.com) However i am unable to successfully configure it with multiple backend servers as i can't give individual host name on httpchk command and with below backend configuration getting http 400 error -
---------------------------------backend svc.op balance roundrobin mode http http-send-name-header Host option httpchk GET /info HTTP/1.1 http-check send-state http-request set-uri /test/abcService server abc.mysrv1.com abc.mysrv1.com:80 check server abc.mysrv2.com abc.mysrv2.com:80 check--------------------------------- [WARNING] 115/162226 (4788) : Server svc.op/abc.mysrv1.com is DOWN, reason: Layer7 wrong status, code: 400, info: "Bad Request: missing required Host header", check duration: 1ms. 1 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.[WARNING] 115/162227 (4788) : Server svc.op/abc.mysrv2.com is DOWN, reason: Layer7 wrong status, code: 400, info: "Bad Request: missing required Host header", check duration: 0ms. 0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.[ALERT] 115/162227 (4788) : backend ' svc.op' has no server available! $ ./haproxy -version HA-Proxy version 1.6.7 2016/07/13 For Reference - I see a patch was created https://www.mail-archive.com/haproxy@formilux.org/msg17321.html to send backend host and port in httpchk to perform health check on individual backend servers. ThanksTapay
