How to use network-control-setup connection to apply settings?

mlaml · July 4, 2019, 2:27pm

Hi,

I have an application in my snap which handles the network configuration of the system (update IP address, add new interfaces, …). The configuration itself is stored as a netplan configuration file.

By using the network-setup-control connection, I am able to read/write to /etc/netplan/xx-config.yaml successfully. Nevertheless, I am not able to apply the new settings because I can’t call the netplan binary from inside my snap (Permission denied) when running in strict mode. Am I missing something here? A quick look into network-setup-control.go on Github showed that the slot indeed does not grant access to the netplan binary. What would be the recommended way to apply network settings?

Kind regards,

Michael

ogra · July 4, 2019, 2:37pm

rebooting …

in my appliance building howto at

i’m pointing to:

which implements automatic import of a netplan.yaml frile from a plugged in USB key …

the actual reboot code is at:

github.com

ogra1/dashkiosk-client-image-config/blob/master/netplan-import#L41


            DIR="$(udisksctl info --block-device "$devname"|grep MountPoints:| sed 's/MountPoints: //')"
            if ls -lha $DIR/netplan.yaml >/dev/null 2>&1; then
                echo "copying netplan.yaml in place"
                cp -av $DIR/netplan.yaml /etc/netplan/00-snapd-config.yaml
                echo "unmounting $devname"
                udisksctl unmount --block-device "$devname" --no-user-interaction
                #echo "rebooting for netplan generate/apply"
                dbus-send --system --print-reply \
                    --dest=org.freedesktop.login1 /org/freedesktop/login1 \
                    "org.freedesktop.login1.Manager.Reboot" boolean:true
            fi
            echo "unmounting $devname"
            udisksctl unmount --block-device "$devname" --no-user-interaction || true
        fi
    fi
fi

actual support for netplan generate/apply via the interfaces will be working once

is implemented …