Re: [ovirt-users] how does ovirt deal with multiple networks, with multiple gateways
Hi Martin, oVirt 4.1 (and maybe earlier versions that I just didn't notice) use policy based routing. You can see these routes by typing "ip rule show" on one of the hosts. In situations such as yours, where you are connected to multiple networks and need to specify which one has the gateway, there is a little trick you need to use on the admin box (usually the hosted engine VM, it' sthe same box that runs the GUI) ssh into that box and then run the following two commands: engine-config -g UserDefinedNetworkCustomProperties engine-config -s UserDefinedNetworkCustomProperties='default_route=^(true|false)$' Next, go into the GUI and onto the Hosts tab. Click on your first host then on the Network Interfaces tab, and "Setup Host Networks" Click on the little pencil icon next to your VM network (the one that should have the default route) and then on the Custom Properties tab. Add the property "default_route" and set it to true and hit OK. Then click on all of the other networks you have and add the same property with the value of false. Then hit OK to save the network config. Repeat this process for all hosts. Note that I think when I did this I had a problem getting it to save for the host that was running the HostedEngine. You may have to put each host into Maintenance Mode in order to apply the setting. This bug has some more details on the setup I think: https://bugzilla.redhat.com/show_bug.cgi?id=1400366 On 2017-04-30 09:00 AM, users-request@ovirt.org wrote:
Message: 1 Date: Sun, 30 Apr 2017 13:03:28 +0200 From: martin chamambo <chamambom@gmail.com> To: Yaniv Kaul <ykaul@redhat.com> Cc: users <users@ovirt.org> Subject: Re: [ovirt-users] how does ovirt deal with multiple networks with multiple gateways Message-ID: <CAHbWOdZRBsTuqWKTzU6Aa4e=e1RXH30fQpg58dT3mOVWZgVAKg@mail.gmail.com> Content-Type: text/plain; charset="utf-8"
I am using ovirt 4.1.1.X.X version on both nodes and Engine. There are no static routes and the network topology is is such a way that only the VMnetwork logical network is on a network with internet and has got a default gateway .
so i have 192.168.1.X with a gateway of say 192.168.1.50 (This has internet) and this is the VM network 192.168.2.X , no gateway and is the ovirtmangnt 192.168.3.X no gateway and its the display ,192.168.4.X , no gateway and its the Migration network 192.168.5.X , no gateway and its the Storage
when i set up these networks using the Ovirt engine GUI , ovirt seems to create routes and rule files for each specific network ,but for some reason , i cant ping anything besides the networks defined
On Sun, Apr 30, 2017 at 8:45 AM, Yaniv Kaul <ykaul@redhat.com> wrote:
Can you share some more details? - What version are you using? - What is the network topology? Are any static routes defined? The fact oVirt sets a specific network for storage does not imply it'll use it for storage automatically - unless routing is properly defined for it.
TIA, Y.
On Sun, Apr 30, 2017 at 8:11 AM, martin chamambo <chamambom@gmail.com> wrote:
Hello
I am testing ovirt and i have configured it with 5 networks as shown below
Display , Migration , VMnetwork ,Storage and the default ovirtmngmnt network
These networks are represented by individual phyiscal interfaces on the ovirt nodes and for some reason the default gateway is not being set correctly
it always seem to prefer the ovirtmngmnt interface as the default
The only network thats supposed to have internet is the VMnetwork role
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Hi, Just adding to what Charles mentioned the patch that allowed this on the host side: https://gerrit.ovirt.org/#/c/66127/ Note that for a tipical VM network, one would not usually define an IP address, as it exposes the host to the VM/s. When a vnic is connected to the network, it will have L2 connectivity through it and you should be able to define on the VM that holds it an IP. Thanks, Edy. On Sun, Apr 30, 2017 at 3:42 PM, Charles Tassell <ctassell@gmail.com> wrote:
Hi Martin,
oVirt 4.1 (and maybe earlier versions that I just didn't notice) use policy based routing. You can see these routes by typing "ip rule show" on one of the hosts.
In situations such as yours, where you are connected to multiple networks and need to specify which one has the gateway, there is a little trick you need to use on the admin box (usually the hosted engine VM, it' sthe same box that runs the GUI) ssh into that box and then run the following two commands:
engine-config -g UserDefinedNetworkCustomProperties engine-config -s UserDefinedNetworkCustomProper ties='default_route=^(true|false)$'
Next, go into the GUI and onto the Hosts tab. Click on your first host then on the Network Interfaces tab, and "Setup Host Networks" Click on the little pencil icon next to your VM network (the one that should have the default route) and then on the Custom Properties tab. Add the property "default_route" and set it to true and hit OK. Then click on all of the other networks you have and add the same property with the value of false. Then hit OK to save the network config. Repeat this process for all hosts.
Note that I think when I did this I had a problem getting it to save for the host that was running the HostedEngine. You may have to put each host into Maintenance Mode in order to apply the setting.
This bug has some more details on the setup I think: https://bugzilla.redhat.com/show_bug.cgi?id=1400366
On 2017-04-30 09:00 AM, users-request@ovirt.org wrote:
Message: 1 Date: Sun, 30 Apr 2017 13:03:28 +0200 From: martin chamambo <chamambom@gmail.com> To: Yaniv Kaul <ykaul@redhat.com> Cc: users <users@ovirt.org> Subject: Re: [ovirt-users] how does ovirt deal with multiple networks with multiple gateways Message-ID: <CAHbWOdZRBsTuqWKTzU6Aa4e=e1RXH30fQpg58dT3mOVWZgVAKg@mail.gm ail.com> Content-Type: text/plain; charset="utf-8"
I am using ovirt 4.1.1.X.X version on both nodes and Engine. There are no static routes and the network topology is is such a way that only the VMnetwork logical network is on a network with internet and has got a default gateway .
so i have 192.168.1.X with a gateway of say 192.168.1.50 (This has internet) and this is the VM network 192.168.2.X , no gateway and is the ovirtmangnt 192.168.3.X no gateway and its the display ,192.168.4.X , no gateway and its the Migration network 192.168.5.X , no gateway and its the Storage
when i set up these networks using the Ovirt engine GUI , ovirt seems to create routes and rule files for each specific network ,but for some reason , i cant ping anything besides the networks defined
On Sun, Apr 30, 2017 at 8:45 AM, Yaniv Kaul <ykaul@redhat.com> wrote:
Can you share some more details?
- What version are you using? - What is the network topology? Are any static routes defined? The fact oVirt sets a specific network for storage does not imply it'll use it for storage automatically - unless routing is properly defined for it.
TIA, Y.
On Sun, Apr 30, 2017 at 8:11 AM, martin chamambo <chamambom@gmail.com> wrote:
Hello
I am testing ovirt and i have configured it with 5 networks as shown below
Display , Migration , VMnetwork ,Storage and the default ovirtmngmnt network
These networks are represented by individual phyiscal interfaces on the ovirt nodes and for some reason the default gateway is not being set correctly
it always seem to prefer the ovirtmngmnt interface as the default
The only network thats supposed to have internet is the VMnetwork role
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
participants (2)
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Charles Tassell -
Edward Haas