libnss-resolve not automatically installed

libnss-resolve not automatically installed

[embedded (VIVAVIS AG)]

Hi,

I'm currently on branch dunfell and using systemd-resolved.

I want to have glibc's NSS resolver functions using systemd-resolved.
I've noticed that the plugin libnss-resolve.so.2 was not in my image
by default.

In systemd_244.5.bb, nss-resolve is in PACKAGECONFIG by default.
libnss-resolve is build and packaged, but not installed by default.

To install the missing library libnss-resolve.so.2, I've added
  IMAGE_INSTALL_append = " libnss-resolve"
to my image recipe, but I wonder, if this is the right place or necessary
at all.
 
My assumption was that having nss-resolve in PACKAGECONFIG will
also install the related library, which is obviously not the case.

Furthermore, I had to write an append-file for base-files, such that
/etc/nsswitch.conf contains the following line
  hosts: resolve [!UNAVAIL=return] files dns myhostname

Possibly, I've overlooked something essential.
I'd be very happy, if someone can shed some light on this issue.

Best regards,

Carsten Stelling

Re: [yocto] libnss-resolve not automatically installed

[Khem Raj]

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On Wed, Aug 3, 2022 at 6:30 PM VIVAVIS AG via lists.yoctoproject.org
<embedded=vivavis.com@lists.yoctoproject.org> wrote:

> Hi,
>
> I'm currently on branch dunfell and using systemd-resolved.
>
> I want to have glibc's NSS resolver functions using systemd-resolved.
> I've noticed that the plugin libnss-resolve.so.2 was not in my image
> by default.
>
> In systemd_244.5.bb, nss-resolve is in PACKAGECONFIG by default.
> libnss-resolve is build and packaged, but not installed by default.
>
> To install the missing library libnss-resolve.so.2, I've added
>   IMAGE_INSTALL_append = " libnss-resolve"
> to my image recipe, but I wonder, if this is the right place or necessary
> at all.
>
> My assumption was that having nss-resolve in PACKAGECONFIG will
> also install the related library, which is obviously not the case.
>

Packageconfigs are about what you would like to build it’s still another
step what you would like to bundle in your image which is what
IMAGE_INSTALL does. At times this is already done because whatever the
packagrconfig is enabling is already part of a output package that’s in
your IMAGE_INSTALL dependencies and gets pulled in indirectly but that’s
not the case here. Therefore you have to do it in both places


> Furthermore, I had to write an append-file for base-files, such that
> /etc/nsswitch.conf contains the following line
>   hosts: resolve [!UNAVAIL=return] files dns myhostname
>
> Possibly, I've overlooked something essential.
> I'd be very happy, if someone can shed some light on this issue.
>
> Best regards,
>
> Carsten Stelling
>
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AW: [yocto] libnss-resolve not automatically installed

[embedded (VIVAVIS AG)]

Hi Khem,

> Von: Khem Raj <raj.khem@gmail.com> 
> Gesendet: Donnerstag, 4. August 2022 13:20
>>
>> To install the missing library libnss-resolve.so.2, I've added
>>   IMAGE_INSTALL_append = " libnss-resolve"
>> to my image recipe, but I wonder, if this is the right place or necessary
>> at all.
>>
>> My assumption was that having nss-resolve in PACKAGECONFIG will
>> also install the related library, which is obviously not the case.
>
> Packageconfigs are about what you would like to build it’s still another step what you would like to bundle in your image which is what IMAGE_INSTALL does. At times this is already done because whatever the packagrconfig is enabling is already part of a output package that’s in your IMAGE_INSTALL dependencies and gets pulled in indirectly but that’s not the case here. Therefore you have to do it in both places
>
>>
>> Furthermore, I had to write an append-file for base-files, such that
>> /etc/nsswitch.conf contains the following line
>>   hosts: resolve [!UNAVAIL=return] files dns myhostname
>>

Ok, there's nothing to worry about.
Adding libnss-resolve to IMAGE_INSTALL and overwriting nsswitch.conf in
the append-file ist he correct procedure here.

Thanks for clarification.

Carsten

Re: [yocto] libnss-resolve not automatically installed

[Khem Raj]

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On Thu, Aug 4, 2022 at 1:35 PM embedded (VIVAVIS AG) <embedded@vivavis.com>
wrote:

> Hi Khem,
>
> > Von: Khem Raj <raj.khem@gmail.com>
> > Gesendet: Donnerstag, 4. August 2022 13:20
> >>
> >> To install the missing library libnss-resolve.so.2, I've added
> >>   IMAGE_INSTALL_append = " libnss-resolve"
> >> to my image recipe, but I wonder, if this is the right place or
> necessary
> >> at all.
> >>
> >> My assumption was that having nss-resolve in PACKAGECONFIG will
> >> also install the related library, which is obviously not the case.
> >
> > Packageconfigs are about what you would like to build it’s still another
> step what you would like to bundle in your image which is what
> IMAGE_INSTALL does. At times this is already done because whatever the
> packagrconfig is enabling is already part of a output package that’s in
> your IMAGE_INSTALL dependencies and gets pulled in indirectly but that’s
> not the case here. Therefore you have to do it in both places
> >
> >>
> >> Furthermore, I had to write an append-file for base-files, such that
> >> /etc/nsswitch.conf contains the following line
> >>   hosts: resolve [!UNAVAIL=return] files dns myhostname
> >>
>
> Ok, there's nothing to worry about.
> Adding libnss-resolve to IMAGE_INSTALL and overwriting nsswitch.conf in
> the append-file ist he correct procedure here.
>

Yes


> Thanks for clarification.
>
> Carsten
>

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