haproxy sni

gistfile1.txt

global
  user haproxy
  group haproxy
  daemon
  log /dev/log local0

defaults
  timeout connect 5s
  timeout client 30s
  timeout server 30s
  timeout tunnel 1h
  log-format frontend:%f\ %b/%s\ client_ip:%Ci\ client_port:%Cp\ SSL_version:%sslv\ SSL_cypher:%sslc\ SNI:%[ssl_fc_has_sni]\ %ts

frontend public_ssl
  bind :443
  log global
  tcp-request inspect-delay 5s
  tcp-request content accept if { req_ssl_hello_type 1 }

  use_backend be_sni if { ssl_fc_has_sni }
  use_backend be_sni if { hdr(host) -i www.example.com }
  default_backend be_no_sni
  #default_backend be_sni

##########################################################################
# TLS SNI
##########################################################################
backend be_sni
  server fe_sni 127.0.0.1:10444 weight 1 send-proxy

frontend fe_sni
  #terminate by matching sni header to certificates in directory
  bind 127.0.0.1:10444 ssl crt /data/src/github.com/openshift/origin/images/router/haproxy/conf/certs accept-proxy no-sslv3
  default_backend openshift_default

##########################################################################
# END TLS SNI
##########################################################################

##########################################################################
# TLS NO SNI
##########################################################################
frontend fe_no_sni
  bind 127.0.0.1:10443 ssl crt /data/src/github.com/openshift/origin/images/router/haproxy-base/conf/default_pub_keys.pem accept-proxy no-sslv3
  default_backend openshift_default

# backend for when sni does not exist, or ssl term needs to happen on the edge
backend be_no_sni
  server fe_no_sni 127.0.0.1:10443 weight 1 send-proxy

##########################################################################
# END TLS NO SNI
##########################################################################
backend openshift_default
  mode http
  option forwardfor
  option http-pretend-keepalive
  server openshift_backend 127.0.0.1:8080

openssl goes to non-sni backend

[vagrant@openshiftdev ~]$ openssl s_client -servername www.example.com -connect 10.245.1.2:443
CONNECTED(00000003)
depth=0 C = --, ST = SomeState, L = SomeCity, O = SomeOrganization, OU = SomeOrganizationalUnit, CN = ip-10-35-63-192, emailAddress = root@ip-10-35-63-192
verify error:num=18:self signed certificate
verify return:1
depth=0 C = --, ST = SomeState, L = SomeCity, O = SomeOrganization, OU = SomeOrganizationalUnit, CN = ip-10-35-63-192, emailAddress = root@ip-10-35-63-192
verify return:1
---
Certificate chain
 0 s:/C=--/ST=SomeState/L=SomeCity/O=SomeOrganization/OU=SomeOrganizationalUnit/CN=ip-10-35-63-192/emailAddress=root@ip-10-35-63-192
   i:/C=--/ST=SomeState/L=SomeCity/O=SomeOrganization/OU=SomeOrganizationalUnit/CN=ip-10-35-63-192/emailAddress=root@ip-10-35-63-192
---
.... removed ....

ssl_fc_has_sni=0

Jan 05 17:51:31 openshiftdev.local haproxy[17807]: frontend:public_ssl be_no_sni/fe_no_sni client_ip:10.245.1.2 client_port:42285 SSL_version:- SSL_cypher:- SNI:0 --