On Wed, Jun 25, 2014 at 5:42 PM, Yongsheng Gong <gong...@unitedstack.com> wrote: > Hi, > for each compute node to have SNAT to Internet, I think we have the > drawbacks: > 1. SNAT is done in router, so each router will have to consume one public IP > on each compute node, which is money.
SNAT can save more ips than wasted on floating ips > 2. for each compute node to go out to Internet, the compute node will have > one more NIC, which connect to physical switch, which is money too > Floating ip also need a public NIC on br-ex. Also we can use a separate vlan to handle the network, so this is not a problem > So personally, I like the design: > floating IPs and 1:N SNAT still use current network nodes, which will have > HA solution enabled and we can have many l3 agents to host routers. but > normal east/west traffic across compute nodes can use DVR. BTW, does HA implementation still active ? I haven't seen it has been touched for a while > > yong sheng gong > > > On Wed, Jun 25, 2014 at 4:30 PM, Zang MingJie <zealot0...@gmail.com> wrote: >> >> Hi: >> >> In current DVR design, SNAT is north/south direction, but packets have >> to go west/east through the network node. If every compute node is >> assigned a public ip, is it technically able to improve SNAT packets >> w/o going through the network node ? >> >> SNAT versus floating ips, can save tons of public ips, in trade of >> introducing a single failure point, and limiting the bandwidth of the >> network node. If the SNAT performance problem can be solved, I'll >> encourage people to use SNAT over floating ips. unless the VM is >> serving a public service >> >> -- >> Zang MingJie >> >> _______________________________________________ >> OpenStack-dev mailing list >> OpenStack-dev@lists.openstack.org >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > _______________________________________________ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev