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From Kevin Kluge <>
Subject RE: Multiple IP's to one instance
Date Thu, 29 Nov 2012 00:44:42 GMT
CloudStack doesn't currently provision SSL offload with NetScaler.   I think that'd be a great
feature, although I assume you'd still have to resort to the multiple port approach (on the
guest) even if CloudStack had SSL offload on to NetScaler.


> -----Original Message-----
> From: Boylan, James []
> Sent: Tuesday, November 27, 2012 3:18 PM
> To:
> Subject: RE: Multiple IP's to one instance
> I agree with Tamas. Cloudstack has functionality that would allow
> implementations using NAT/LoadBalancer configurations that would not require
> multiple IPs. Plus the NetScaler Service, if it is a true Netscaler implementation,
> supports loading the certs into it thus removing the multiple IP address
> requirement.
> -- James
> ________________________________________
> From: Tamas Monos []
> Sent: Tuesday, November 27, 2012 4:20 AM
> To:
> Subject: RE: Multiple IP's to one instance
> Hi,
> Also I have tested earlier 3.0.2 and if you create multiple networks for the same
> account then the VM automatically gets that many IPs and NICs as many
> network the VM has.
> Then you can use static nat if you need to support multiple websites.
> Or another solution to this is to have many static nat IPs on the same network
> and port forward each IPs port 80 and 443 onto a different port on the VM and
> configure apache to listen on different ports for different virtual hosts.
> There is always a workaround.
> Regards
> Tamas Monos                                               DDI         +44(0)2034687012
> Chief Technical                                             Office    +44(0)2034687000
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> -----Original Message-----
> From: Kevin Kluge []
> Sent: 26 November 2012 19:03
> To:
> Subject: RE: Multiple IP's to one instance
> >
> > I am conflicted on this - I know the limitations with adding additional
> interfaces.
> > I'd almost argue for requiring number of interfaces/IPs to be set at
> > machine instantiation and still handing out addresses to all
> > interfaces via DHCP, but not all OSes will handle that cleanly.
> As you probably know CS hands out IPs via DHCP to multiple NICs today, and it is
> challenging to work reliably since different guest OS's have different behavior
> with respect to setting/re-setting the default route in DHCP replies.  Today
> CloudStack has some knowledge of guest OS to make this work but we've seen
> bugs with that where the list of guest OS behavior is not right.  Those are fixable.
> But there are other cases (e.g. boot from ISO, a user changes the DHCP client
> post-create, or the user upgrades the OS which changes the DHCP client) where I
> don't think there is a reasonable fix.  So I think we need at a minimum an option
> to disable DHCP reply on NICs that are not the default route.  We should even
> consider a behavior change to make that the only option.
> -kevin

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