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.
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.
There're two ways for Cloud DB server.
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
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.
Great post Hugo. Very interesting.
ReplyDeleteThanks dude
ReplyDeleteYou should write about your experiences trying to setup a nova network service in High Availability: active-active, active-passive, clustered nova network services... I have read about your progress in the mailing lists and launchpad and I think you can gather all your research in a great post!
ReplyDeleteHi , Diego .
ReplyDeleteIn this post , it's not a NOVA service layer HA.
It's APP layer , There're many tricky stuff in
this topology.
I'm not sure if this approach could be use for a public cloud , But I believe it's useful for a internal private cloud.
I got some idea about nova-network HA solution , but have no time to test that. I'll do it later.
There's a blueprint about Nova-network HA (by NTT PF Lab), It's almost same with the idea in my mind. I'm focus on Active/Active. But really hard to implement. I will build a NOVA as this post for our team first. The custom image will be pre-set route from other gateway instead of nova-network.
ReplyDeletehttps://blueprints.launchpad.net/nova/+spec/making-nova-components-ha
Another consideration is to inject network-configuration file into instance and route from other pure gateway(physical or software), But floating ip feature will lose.
Hugo, "Storetrends" in your diagrams appears to be a generic storage system. I gather it is a reference to American Megatrends "StorTrends".
ReplyDeleteIn your diagram is this a SAN? NAS? iSCSI? or something else? JBOD?
Dave,
ReplyDeleteYes , it's "AMI StorTrends" model#2400i
In this diagram ,
1. Volume : Using iSCSi target on StorTrend
2. Compute-node : Image caching with NFS on StorTrend
3. Glance : iSCSi for saving images on Stortrend
(Maybe I have to change it into NFS, once I have multiple Galnce)
If you want more details , just ask me
Cheers Hugo
Nice information regarding openstack nova my sincere thanks for shaaring this post Please Continue to share this post
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