Re: [openstack-dev] [Neutron] Use public IP address as instance fixed IP
Just want to clarify something. this public ip as private ip is only for external facing interfaces on a set of VM instances. At the same time, the majority of interfaces on hte same set of VM instances will not have public ip and their subnets are isolated networks. Will this change your conclusion when you mentioned the gateway_external_network_id is left blank for the L3 agent ? On Mon, Aug 25, 2014 at 1:07 AM, Kevin Benton blak...@gmail.com wrote: I think this will depend on the deployment type for the L3 agent. If the gateway_external_network_id is left blank for the L3 agent, the external network is vlan tagged just like any regular network and doesn't have an independent bridge.[1] In that deployment scenario it should work fine. On Sun, Aug 24, 2014 at 9:30 AM, Mohammad Banikazemi m...@us.ibm.com wrote: Would this work? We used to have warnings in Neutron docs indicating that instances should not be attached to external networks: It is important to understand that you should not attach the instance to Ext-Net directly. Instead, you must use a floating IP to make it accessible from the external network. In this particular case and with the OVS plugin, the traffic on the external network which now hosts tenant VMs (on OpenStack compute nodes) should get routed from the br-int to the external bridge br-ex using for example the appropriate vlan id (what if external network does not use vlan?) and then to the external network without doing the NATing. Would this traffic go through the veth pair connecting the br-int and br-ex? Mohammad [image: Inactive hide details for Kevin Benton ---08/23/2014 01:37:28 AM---Yes, you should be able to create a shared/external network]Kevin Benton ---08/23/2014 01:37:28 AM---Yes, you should be able to create a shared/external network within Neutron to accomplish this. From: Kevin Benton blak...@gmail.com To: OpenStack Development Mailing List (not for usage questions) openstack-dev@lists.openstack.org Date: 08/23/2014 01:37 AM Subject: Re: [openstack-dev] [Neutron] Use public IP address as instance fixed IP -- Yes, you should be able to create a shared/external network within Neutron to accomplish this. On Fri, Aug 22, 2014 at 7:25 AM, Bao Wang *bywan...@gmail.com* bywan...@gmail.com wrote: Thank you for your response. Could this be done naturally with Openstack neutron or have to be done manually outside neutron ? As we are expecting to orchestrate hundreds of NFV with all similar network configuration, programmability is another key element. On Thu, Aug 21, 2014 at 3:52 PM, Kevin Benton *blak...@gmail.com* blak...@gmail.com wrote: Have you tried making the external network shared as well? Instances that need a private IP with NAT attach to an internal network and go through the router like normal. Instances that need a public IP without NAT would just attach directly to the external network. On Thu, Aug 21, 2014 at 7:06 AM, Bao Wang *bywan...@gmail.com* bywan...@gmail.com wrote: I have a very complex Openstack deployment for NFV. It could not be deployed as Flat. It will have a lot of isolated private networks. Some interfaces of a group VM instances will need bridged network with their fixed IP addresses to communicate with outside world while other interfaces from the same set of VM should keep isolated with real private/fixed IP addresses. What happen if we use public IP addresses directly as fixed IP on those interfaces ? Will this work with Openstack neutron networking ? Will Openstack do NAT automatically on those ? Overall, the requirement is to use the fixed/public IP to communicate with outside directly on some interfaces of some VM instances while keeping others as private. The floating IP is not an option here ___ OpenStack-dev mailing list *OpenStack-dev@lists.openstack.org* OpenStack-dev@lists.openstack.org *http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev* http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Kevin Benton ___ OpenStack-dev mailing list *OpenStack-dev@lists.openstack.org* OpenStack-dev@lists.openstack.org *http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev* http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev ___ OpenStack-dev mailing list *OpenStack-dev@lists.openstack.org* OpenStack-dev@lists.openstack.org *http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev* http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Kevin
Re: [openstack-dev] [Neutron] Use public IP address as instance fixed IP
Sorry, not good with neutron. Could you explain what use a regular segmentation identifer like the rest of the network ? What is this segmentation identifier ? On Tue, Aug 26, 2014 at 3:07 PM, Kevin Benton blak...@gmail.com wrote: No, the gateway_external_network_id option just refers to how your network is deployed. If the external network uses a regular segmentation identifier like the rest of the networks, this will work. If not, it won't because the instances will try to use a segmentation identifier. In other words, if you have a separate physical interface for external networks on your L3 agent nodes, this will not work. On Aug 26, 2014 12:14 PM, Bao Wang bywan...@gmail.com wrote: Just want to clarify something. this public ip as private ip is only for external facing interfaces on a set of VM instances. At the same time, the majority of interfaces on hte same set of VM instances will not have public ip and their subnets are isolated networks. Will this change your conclusion when you mentioned the gateway_external_network_id is left blank for the L3 agent ? On Mon, Aug 25, 2014 at 1:07 AM, Kevin Benton blak...@gmail.com wrote: I think this will depend on the deployment type for the L3 agent. If the gateway_external_network_id is left blank for the L3 agent, the external network is vlan tagged just like any regular network and doesn't have an independent bridge.[1] In that deployment scenario it should work fine. On Sun, Aug 24, 2014 at 9:30 AM, Mohammad Banikazemi m...@us.ibm.com wrote: Would this work? We used to have warnings in Neutron docs indicating that instances should not be attached to external networks: It is important to understand that you should not attach the instance to Ext-Net directly. Instead, you must use a floating IP to make it accessible from the external network. In this particular case and with the OVS plugin, the traffic on the external network which now hosts tenant VMs (on OpenStack compute nodes) should get routed from the br-int to the external bridge br-ex using for example the appropriate vlan id (what if external network does not use vlan?) and then to the external network without doing the NATing. Would this traffic go through the veth pair connecting the br-int and br-ex? Mohammad [image: Inactive hide details for Kevin Benton ---08/23/2014 01:37:28 AM---Yes, you should be able to create a shared/external network]Kevin Benton ---08/23/2014 01:37:28 AM---Yes, you should be able to create a shared/external network within Neutron to accomplish this. From: Kevin Benton blak...@gmail.com To: OpenStack Development Mailing List (not for usage questions) openstack-dev@lists.openstack.org Date: 08/23/2014 01:37 AM Subject: Re: [openstack-dev] [Neutron] Use public IP address as instance fixed IP -- Yes, you should be able to create a shared/external network within Neutron to accomplish this. On Fri, Aug 22, 2014 at 7:25 AM, Bao Wang *bywan...@gmail.com* bywan...@gmail.com wrote: Thank you for your response. Could this be done naturally with Openstack neutron or have to be done manually outside neutron ? As we are expecting to orchestrate hundreds of NFV with all similar network configuration, programmability is another key element. On Thu, Aug 21, 2014 at 3:52 PM, Kevin Benton *blak...@gmail.com* blak...@gmail.com wrote: Have you tried making the external network shared as well? Instances that need a private IP with NAT attach to an internal network and go through the router like normal. Instances that need a public IP without NAT would just attach directly to the external network. On Thu, Aug 21, 2014 at 7:06 AM, Bao Wang *bywan...@gmail.com* bywan...@gmail.com wrote: I have a very complex Openstack deployment for NFV. It could not be deployed as Flat. It will have a lot of isolated private networks. Some interfaces of a group VM instances will need bridged network with their fixed IP addresses to communicate with outside world while other interfaces from the same set of VM should keep isolated with real private/fixed IP addresses. What happen if we use public IP addresses directly as fixed IP on those interfaces ? Will this work with Openstack neutron networking ? Will Openstack do NAT automatically on those ? Overall, the requirement is to use the fixed/public IP to communicate with outside directly on some interfaces of some VM instances while keeping others as private. The floating IP is not an option here ___ OpenStack-dev mailing list *OpenStack-dev@lists.openstack.org* OpenStack-dev@lists.openstack.org *http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev* http
Re: [openstack-dev] [Neutron] Use public IP address as instance fixed IP
Thank you for your response. Could this be done naturally with Openstack neutron or have to be done manually outside neutron ? As we are expecting to orchestrate hundreds of NFV with all similar network configuration, programmability is another key element. On Thu, Aug 21, 2014 at 3:52 PM, Kevin Benton blak...@gmail.com wrote: Have you tried making the external network shared as well? Instances that need a private IP with NAT attach to an internal network and go through the router like normal. Instances that need a public IP without NAT would just attach directly to the external network. On Thu, Aug 21, 2014 at 7:06 AM, Bao Wang bywan...@gmail.com wrote: I have a very complex Openstack deployment for NFV. It could not be deployed as Flat. It will have a lot of isolated private networks. Some interfaces of a group VM instances will need bridged network with their fixed IP addresses to communicate with outside world while other interfaces from the same set of VM should keep isolated with real private/fixed IP addresses. What happen if we use public IP addresses directly as fixed IP on those interfaces ? Will this work with Openstack neutron networking ? Will Openstack do NAT automatically on those ? Overall, the requirement is to use the fixed/public IP to communicate with outside directly on some interfaces of some VM instances while keeping others as private. The floating IP is not an option here ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Kevin Benton ___ 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] [Neutron] Use public IP address as instance fixed IP
I have a very complex Openstack deployment for NFV. It could not be deployed as Flat. It will have a lot of isolated private networks. Some interfaces of a group VM instances will need bridged network with their fixed IP addresses to communicate with outside world while other interfaces from the same set of VM should keep isolated with real private/fixed IP addresses. What happen if we use public IP addresses directly as fixed IP on those interfaces ? Will this work with Openstack neutron networking ? Will Openstack do NAT automatically on those ? Overall, the requirement is to use the fixed/public IP to communicate with outside directly on some interfaces of some VM instances while keeping others as private. The floating IP is not an option here ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
