This reverts commit 97f2b9936a8b9e3a057116d327b058253458b4ef.
Use the following solution instead:
* add unique_name field to the network_offerings table. Use this filed as a unique offering identifier in the code
* Added db upgrade steps to 225to226 sql script
Conflicts:
server/src/com/cloud/offerings/NetworkOfferingVO.java
* remove records from load_balancer_vm_map if the parent record is missing in load_balancer table
* remove user vm records from vm_instance table when corresponding record is missing in user_vm table
2) Added new config parameter 'allow.subdomain.network.access' - default value is true. If it's set to false, the child domain can't use the network of the parent domain
Sometime when keepalived start up(during system boot up period), it would fail
to(likely due to unable to receive the packet), and think itself is the only
router, then make itself master.
Add 10 seconds delay after start up to work around the issue.
This patch enable redundant virtual routers.
1. To enable this feature, db need to be updated using follow SQL by now(we
would get a UI way later):
UPDATE network_offerings SET redundant_router=1 WHERE guest_type="Virtual" AND
system_only=0;
2. System would try to start up two routers at different hosts. But if there is
only one host in the zone, system would start up two routers on it.
3. The failover part is using keepalived, and connection tracking part is using
conntrackd. There would be one master router and one backup router. The status
of router(master or backup) can be query from the database table domain_router
now. Management server would update the status every 30s by default.
4. The routers for the same zone would use same external NIC(same ip and mac).
The script used for fail-over would ensure only one external NIC present in the
network at any time.
5. Currently management server don't got the ability to stop one of router is
both of them reported as master. The feature is in the todo list.
After two routers start up, disconnect anyone of them, the guest network
shouldn't be affected, and established connection(http, ssh, etc.) should still
works. The fail-over on gateway part should be 3~4 seconds.
Currently the patch works with KVM. Would deal with vmware and XenServer soon.
