HAproxy Nodes

HAProxy is a very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for web sites crawling under very high loads while needing persistence or Layer 7 processing. Supporting tens of thousands of connections is clearly realistic with today’s hardware.

For installing HAproxy on your nodes, you should consider its official documentation. Also, you have to consider that this service should not be a single point of failure, so you need at least two nodes running HAproxy.

Here is an example for HAproxy configuration file:

global
  chroot  /var/lib/haproxy
  daemon
  group  haproxy
  maxconn  4000
  pidfile  /var/run/haproxy.pid
  user  haproxy

defaults
  log  global
  maxconn  8000
  option  redispatch
  retries  3
  timeout  http-request 10s
  timeout  queue 1m
  timeout  connect 10s
  timeout  client 1m
  timeout  server 1m
  timeout  check 10s

listen dashboard_cluster
  bind <Virtual IP>:443
  balance  source
  option  tcpka
  option  httpchk
  option  tcplog
  server controller1 10.0.0.1:443 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:443 check inter 2000 rise 2 fall 5

listen galera_cluster
  bind <Virtual IP>:3306
  balance  source
  option  httpchk
  server controller1 10.0.0.4:3306 check port 9200 inter 2000 rise 2 fall 5
  server controller2 10.0.0.5:3306 check port 9200 inter 2000 rise 2 fall 5
  server controller3 10.0.0.6:3306 check port 9200 inter 2000 rise 2 fall 5

listen glance_api_cluster
  bind <Virtual IP>:9292
  balance  source
  option  tcpka
  option  httpchk
  option  tcplog
  server controller1 10.0.0.1:9292 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:9292 check inter 2000 rise 2 fall 5

listen glance_registry_cluster
  bind <Virtual IP>:9191
  balance  source
  option  tcpka
  option  tcplog
  server controller1 10.0.0.1:9191 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:9191 check inter 2000 rise 2 fall 5

listen keystone_admin_cluster
  bind <Virtual IP>:35357
  balance  source
  option  tcpka
  option  httpchk
  option  tcplog
  server controller1 10.0.0.1:35357 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2.42:35357 check inter 2000 rise 2 fall 5

listen keystone_public_internal_cluster
  bind <Virtual IP>:5000
  balance  source
  option  tcpka
  option  httpchk
  option  tcplog
  server controller1 10.0.0.1:5000 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:5000 check inter 2000 rise 2 fall 5

listen nova_ec2_api_cluster
  bind <Virtual IP>:8773
  balance  source
  option  tcpka
  option  tcplog
  server controller1 10.0.0.1:8773 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:8773 check inter 2000 rise 2 fall 5

listen nova_compute_api_cluster
  bind <Virtual IP>:8774
  balance  source
  option  tcpka
  option  httpchk
  option  tcplog
  server controller1 10.0.0.1:8774 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:8774 check inter 2000 rise 2 fall 5

listen nova_metadata_api_cluster
  bind <Virtual IP>:8775
  balance  source
  option  tcpka
  option  tcplog
  server controller1 10.0.0.1:8775 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:8775 check inter 2000 rise 2 fall 5

listen cinder_api_cluster
  bind <Virtual IP>:8776
  balance  source
  option  tcpka
  option  httpchk
  option  tcplog
  server controller1 10.0.0.1:8776 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:8776 check inter 2000 rise 2 fall 5

listen ceilometer_api_cluster
  bind <Virtual IP>:8777
  balance  source
  option  tcpka
  option  httpchk
  option  tcplog
  server controller1 10.0.0.1:8774 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:8774 check inter 2000 rise 2 fall 5

listen spice_cluster
  bind <Virtual IP>:6082
  balance  source
  option  tcpka
  option  tcplog
  server controller1 10.0.0.1:6080 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:6080 check inter 2000 rise 2 fall 5

listen neutron_api_cluster
  bind <Virtual IP>:9696
  balance  source
  option  tcpka
  option  httpchk
  option  tcplog
  server controller1 10.0.0.1:9696 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:9696 check inter 2000 rise 2 fall 5

listen swift_proxy_cluster
  bind <Virtual IP>:8080
  balance  source
  option  tcplog
  option  tcpka
  server controller1 10.0.0.1:8080 check inter 2000 rise 2 fall 5
  server controller2 10.0.0.2:8080 check inter 2000 rise 2 fall 5

After each change of this file, you should restart HAproxy.