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On Wed, Aug 2, 2017 at 5:21 AM, Zenghui Shi <zshi at redhat.com> wrote:
>
> On Wed, 2 Aug 2017 at 02:34 Ben Nemec <openstack at nemebean.com> wrote:
>>
>>
>>
>> On 07/25/2017 09:53 PM, Zenghui Shi wrote:
>> > Hi,
>> >
>> > Could anyone shed some light on how to get the physical interface name
>> > (e.g eth0) from network name (e.g PublicNetwork, ExternalNetwork) in
>> > tripleo-heat-template service profile ?
>> >
>> > for example:
>> >
>> > I want to add a service profile under puppet/services/time/ptp.pp where
>> > it uses 'PtpInterface' as a parameter to get physical interface name
>> > (please refer to below piece of code), but I'd like to expose a more
>> > user friendly parameter like NetworkName(e.g. provision network,
>> > external network etc) instead of 'PtpInterface' and retrieve the actual
>> > physical interface name from the NetworkName where the physical
>> > interface is connected to, is there any possible way to do this ?
>>
>> I don't think there is.  In many cases the templates don't even know the
>> name of the physical device on which the network will be running.  A
>> simple example would be when a user uses the nicX abstraction to specify
>> interfaces in their net-iso templates.  That doesn't get mapped to an
>> actual interface name until os-net-config runs, and the results of that
>> run are not available to the templates.
>
>
> Thanks Ben!
>
> I'm also thinking if it makes sense to have a way in template or target
> nodes to re-use the results of os-net-config for services which are bonded
> to certain interfaces, or re-implement the os-net-config logic in template
> to get the physical interface name. The latter one will be a repetitive work
> of os-net-config.

This patch [1] has been started by Dan Sneddon to provide the nic
number to name mapping by providing an extra option "--interfaces" to
os-net-config command. May this could be reused to get the mapping.

Regards,
Saravanan KR

[1] https://review.openstack.org/#/c/383516/

>
> Cheers!
> Zenghui
>>
>>
>> >
>> > ####
>> > parameters:
>> > [...]
>> >    PtpInterface:      #  ---> change this parameter to PtpNetwork
>> >      default: eth0
>> >      description: PTP interfaces name.
>> >      type: string
>> >
>> > resources:
>> >    RoleParametersValue
>> >      type: OS::Heat::Value
>> >      properties:
>> >        type: json
>> >        value:             # ---> add logic to get real interface name
>> > from PtpNetwork
>> >          map_replace:
>> >            - map_replace:
>> >              - tripleo::profile::base::time::ptp::ptp4l_interface:
>> > PtpInterface
>> >              - values: {get_param: [RoleParameters]}
>> >            - values:
>> >                PtpInterface: {get_param: PtpInterface}
>> >
>> > outputs:
>> >    role_data:
>> >      description: Role ptp using commposable services.
>> >      value:
>> >        service_name: ptp
>> >        config_settings:
>> >          map_merge:
>> >            - get_attr: [RoleParametersValue, value]
>> > [...]
>> > ####
>> >
>> > Thanks!
>> > zenghui
>> >
>> >
>> >
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>
>
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