The method of Web Service HA+LB in OPENSTACK NOVA for private cloud only

Cloud Server HA+LB  in NOVA


Our purpose is to provide uninterrupted   web services  with low cost in OPENSTACK. Due to all instances traffic through Nova-Network host in a basic deployment of NOVA . And it's hard to do HA+LB for Nova-Network. As I know it will be very hard to implement. 
After read "Bootstrapping OpenStack Clouds" doc writed by DELL....The fault zone concept it much easier and cheaper. 



There're three diagrams ....
I. Two zones topology , share nothing between each zones. But combine two instance network in same network segment. Zone1 using 192.168.1.0/25,   Zone2 using 192.168.1.128/25 . We do  not using floating ip. Let instance route from Core Network  Switch directly.

II. The difference from first diagram is Storage related openstack service. Two zones use one Glance + OBJ + Volume controller.

III. The communication of these virtual cluster.

A very important point is LoadBalancer. When keepalived bind IP to instance . It doesn't work. Plz check the link.. Thanks Vish

https://answers.launchpad.net/nova/+question/161512

After rewrite firewall.py and restart libvirt and nova-compute ..  the Virtual IP is working now.

vi /usr/share/pyshared/nova/virt/libvirt/firewall.py


Delete line 214-216 , It's not a regular way. but faster for us in our internal cloud. A better solution , plz check the QA link.

    209     def _ensure_static_filters(self):
    210         if self.static_filters_configured:
    211             return
    212
    213         self._define_filter(self._filter_container('nova-base',
  -  214                                                    ['no-mac-spoofing',
  -  215                                                     'no-ip-spoofing',
  -  216                                                     'no-arp-spoofing',
    217                                                     'allow-dhcp-server']))
    218         self._define_filter(self._filter_container('nova-vpn',
    219                                                    ['allow-dhcp-server']))
    220         self._define_filter(self.nova_base_ipv4_filter)
    221         self._define_filter(self.nova_base_ipv6_filter)
    222         self._define_filter(self.nova_dhcp_filter)
    223         self._define_filter(self.nova_ra_filter)
    224         if FLAGS.allow_project_net_traffic:
    225             self._define_filter(self.nova_project_filter)
    226             if FLAGS.use_ipv6:
    227                 self._define_filter(self.nova_project_filter_v6)
    228
    229         self.static_filters_configured = True

There're two ways for Cloud DB server.