[Openstack] No internet connection to the VMs
Giulio Vito de Musso
giulio.vito.demusso at gmail.com
Tue Oct 1 15:34:31 UTC 2013
Hi Darragh and thanks for the tip
I tried this command and now the VM can ping the computers which are in the
Devstack-machine's LAN but these one (obviously) cannot ping the VM; but
that's not a problem.
The problem is that the VM cannot ping one of the Google's IPs (22.214.171.124)
even though it should access the Google's IP by the Devstack's IP. How can
2013/10/1 Darragh O'Reilly <dara2002-openstack at yahoo.com>
> the packets from the instance are leaving the devstack VM with the
> floating IP as the source address. Even if they do get out to the Internet,
> upstream routers would not know what to do with the return packets which
> have the floating IP as the destination address.
> Try this on the devstack VM:
> sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
> Then the packets will be SNATed to the devstack VM IP before they leave.
> Re, Darragh.
> > Giulio Vito de Musso giulio.vito.demusso at gmail.com
> > Mon Sep 30 21:31:03 UTC 2013
> > Previous message: [Openstack] OVS bandwidth limiting
> > Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
> > Hi to all,
> > I'm facing a problem with Devstack+Neutron+LBaaS.
> > I installed Devstack+Neutron+LBaaS onto a Ubuntu 12.04 VM adding the
> > following lines to Devstack's localrc and then running stack.sh
> > > disable_service n-net
> > > enable_service q-svc
> > > enable_service q-agt
> > > enable_service q-dhcp
> > > enable_service q-l3
> > > enable_service q-meta
> > > enable_service neutron
> > > enable_service tempest
> > > enable_service q-lbaas
> > At the end of the installation I create a network with a "mySubnet"
> > (with a 192.168.0.0/24 IP range and the DNS IPs set properly), a
> > "myKeypair" keypair, a "myRouter" router and link the router to the
> > "public" (as external gateway) and "mySubnet" networks.
> > Then I launch a Ubuntu Cloud 12.04 VM in Horizon associating the mySubnet
> > network, the myKeypair keypair and a brand new floating IP.
> > I can ping and SSH the VM from the Devstack machine and the VM can ping
> > Devstack machine, the br-ex and the myRouter; the problem is that the VM
> > cannot access the Internet.
> > In particular, it seems that the VM cannot ping the DNS server (infact it
> > cannot resolve any Internet hostname) even though the br-ex bridge is up
> > running.
> > What can be the problem? I'm stuck at this point for three weeks and
> > go forward in my LBaaS analysis.
> > Thanks
> > Giulio
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