Everything Charles said is correct. Sorry for the late reply, gmail doesn't like your DKIM settings.
The EC2 internal/external IP stuff is annoying, but I think it's reasonable to use DNS for resolving addresses (at least for the web UI, which is pretty common throughout the internet). I don't really know of a better way to do it. On Wed, Jun 19, 2013 at 2:58 PM, Charles Reiss <[email protected]> wrote: > On 6/19/13 10:51 , Vinod Kone wrote: > > Sorry for the radio silence on this. > > > > This is probably just me not understanding how EC2 networking works, but > I > > have couple of questions. > > > > > >>> You can't `bind()' to an address that the network interface is not > >>> assigned. Maybe there is another workaround? I wouldn't know where to > >>> look. > >>> > >> > > > > So, you are saying the public ip address the EC2 host gets is not > assigned > > to the NIC? How does it get it then? > > It's NAT'd. > > > > > > >> > Either way, I think it's preferable to use DNS because it will map to > >> the > >>> correct address regardless of whether you're in or out of the EC2 > >> network. > >>> > >> > > > > Where does DNS come into the picture? > > Inside EC2, the ec2-...amazonaws.com name resolves to the private (usually > 10.x.x.x) IP. > > > > > > >> > > >>> On Mon, Jun 17, 2013 at 3:16 PM, Charles Reiss <[email protected]> > >> wrote: > >> > >>>> For everything but the webui, it's better to prefer the private IP > >> because > >>>> Amazon charges for data transfer using the public IP. > >>>> > >> > > > > I thought the problem with mesos on ec2 was that masters and slaves were > > not able to communicate when using private ip addresses (IIRC, at least > one > > way communication was broken). So, I'm not sure how we can get around by > > not using public ip addresses for communication. > > I've haven't heard of this being a problem if everything is within EC2. > (There's certainly likely to be a problem if one wants to run a scheduler > outside EC2.) > > - Charles > > > > > > > > > > >>>> - Charles > >>>> > >>>>> > >>>>> > >>>>> On Mon, Jun 17, 2013 at 2:47 PM, Brenden Matthews < > >>>>> [email protected]> wrote: > >>>>> > >>>>>> Folks, > >>>>>> > >>>>>> I'd like to be able to make the master redirection in the web UI > work > >>>> with > >>>>>> EC2, which has weird internal/external IP address issues. > >>>>>> > >>>>>> I was thinking about adding a hostname to the Master info message, > >> and > >>>>>> adding that along with the libprocess PID into the ZooKeeper state > in > >>>>>> detector.{cpp,hpp}. > >>>>>> > >>>>>> Any thoughts on this? Are there any objections or concerns? From > >>>>>> examining the code, I couldn't think of a better way to do this. > >>>>>> > >>>>>> Thanks! > >>>>>> > >>>>>> Brenden > >>>>>> > >>>>> > >>>> > >>>> > >>> > >> > > > >
