Snapd fails to start in my custom ubuntu-core

[Luke Williams]

Hi Mike,

One thing I noticed is that if you build your kernel snap with confinement:
strict
It will build your image with the three snaps showing in the snap list
command, so that when you add other snaps, Jr. Does not download the
Ubuntu-core snap and make the system 100% unstable.

I've also been using the stable channel instead of edge since the edge
channel I have not been able to get the device to detect the network
properly on many devices mainly because it's looking for network, and it
being a switch, relies on the network drivers to be loaded before the cloud
unit rubs, which has lead to a boot up time of 5 minutes on initial boot.


On Thursday, September 8, 2016, MikeB <mabnhdev at gmail.com> wrote:

>
> I'm looking to run OpenSwitch on several new whitebox switch platforms
> with Snappy/Ubuntu-Core as the native OS.
>
> Each of these platforms requires a custom kernel in order to boot.
> Each of these platforms requires at least one custom kernel driver to
> access the network ASIC.
> Each of these platforms is initially loaded using ONIE.
>
> I currently use snapcraft and the kernel plugin to create a custom kernel
> snap for each platform.  I apply any necessary kernel patches during the
> pull stage through a custom plugin.  I inject the custom .ko driver files
> into the parts/kernel/install between the build and stage phases of
> snapcraft.
>
> I then use 'ubuntu-device-flash core 16 --channel=edge --kernel=$snap
> --gadget=pc --os=ubuntu-core -o $IMG' to create an image.
>
> I then use kpartx and ONIE scripts to create an ONIE NOS Installer from
> the image I created.
>
> The most critical problem I have now is that snapd fails to start on my
> target systems.  No snapd, no snaps.   I assume it is because 'Sep  8
> 10:56:02 localhost snap[853]: error: cannot read assert seed dir: open
> /var/lib/snapd/seed/assertions: no such file or directory'.  However, I
> also see many instances of the following message: 'Sep  8 11:06:34
> localhost snapd[1689]: error: cannot downgrade: snapd is too old for the
> current system state (patch level 3)'.
>
> Regards, Mike
>


-- 
Thanks,


Luke Williams - Technical Partner Manager, Network Switches and Ubuntu-Core
luke.williams at canonical.com
www.canonical.com || www.ubuntu.com
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