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From "WXR" <474745...@qq.com>
Subject Re: How can I allocate a specific IP when I create an instance.
Date Thu, 27 Jun 2013 04:42:54 GMT
If I modify the ip of the vm in nic table and restart the vrouter system vm,
the instance vm can get the new ip which I specify.
But this ip can't be used normally.Them vm can not access the gateway ip even if I'v stopped
the iptables of its host node machine.


------------------ Original ------------------
From:  "Dave Dunaway"<dave.dunaway@gmail.com>;
Date:  Wed, Jun 26, 2013 11:51 PM
To:  "users"<users@cloudstack.apache.org>; 

Subject:  Re: How can I allocate a specific IP when I create an instance.



There should be a way to have the ability to reserve an IP and still have
DHCP assign the IP by mac reservation. There's no technical reason this
wouldn't work and likely a feature a lot of people would love to see. The
only hold back is the UI not allowing you to do so.

Ultimately, you can go to the DB and change the VM's IP in the nics table
to what you want (reboot the VM and the IP change will occur). Which is not
the preferred way to do so, but ultimately that functionality from the UI
would be ideal.

Even going as far as intergrating IPAM functionality into the product would
be ideal.


On Wed, Jun 26, 2013 at 11:44 AM, Geoff Higginbottom <
geoff.higginbottom@shapeblue.com> wrote:

> Simple answer - you can't.
>
> In an advanced zone, you can specify the IP address when you create a new
> VM using the API, however in a basic zone, because the IP will depend on
> which POD your VM ends up in, and as a user you cannot influence this,
> there is no way to specific the IP, even if you are a root admin.
>
> The reason it still fails when you manually change the IP is that the
> security groups feature is expecting the VM to have the IP CloudStack
> allocated it via DHCP.
>
> Regards
>
> Geoff Higginbottom
> CTO / Cloud Architect
>
>
> D: +44(0)20 3603 0542<tel:+442036030542> | S: +44(0)20 3603 0540<tel:
> +442036030540> | M: +44(0)7968161581<tel:+447968161581>
>
> geoff.higginbottom@shapeblue.com<mailto:geoff.higginbottom@shapeblue.com>
> | www.shapeblue.com
>
> ShapeBlue Ltd, 53 Chandos Place, Covent Garden, London, WC2N 4HS
>
>
>
> On 26 Jun 2013, at 05:02, "WXR" <474745079@qq.com<http://qq.com>> wrote:
>
> cloudstack version: 4.1
> network type: basic network
>
> When I create a new instance,the vm will get a random IP from the DHCP
> server on vrouter.
>
> If I want to:
> 1.allocate a specific ip to the vm.
> 2.allocate multiple ips to the vm.
> 3.change the vm ip from one to another.
>
> How can I achieve it? I try to bind the ip to the vm nic manually but the
> ip can not be accessed.
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