Revert "bug 11056: Add backported kernel and discard customized kernel module"
This reverts commit 857e817cfc707f4280f295a91642ded861c5aa68.
Bug 13403 is due to new kernel fail to suppose hot-unplug of xen vnif.
Notice the module is only backported for kernel 2.6.32-5-686-bigmem. That's why
I hardcode the kernel version here.
status 13403: resolved fixed
But still keep customized iptables because the newer version of iptables would
result in very big range of package upgrading due to dependence relationship.
Also add newer version of "virt-what" from debian testing, otherwise it would
provide wrong information for xen-domU(reported as xen-dom0 in previous version
for 2.6.39). This one have no dependency issue and can be added easily.
status 11056: resolved fixed
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.
