Yes, the kernel did get updated, causing the wg module dependencies to get out of sync. A reboot after the update should solve this, otherwise you may need to run the package's preinst script to get the modules back in sync. Should be no need to reinstall the wg packages.

On Thu, Feb 21, 2019, at 2:14 AM, Arpit Gupta wrote:
Hi All

I am running raspberry pi v3 and ran apt-get update and upgrade commands to get upto date. It also ended up updating the kernel i think. I should have paid more attention to what all was getting updated.

After the update wireguard was not running and upon debugging i found that the wireguard kernel module was no longer present. So i uninstalled all wireguard packages and installed them again and the module showed up and on reboot system was back to normal. What i was curious was how should one go about doing os/kernel updates in future in order to avoid this issue?

I am running
Linux raspberrypi 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux
No LSB modules are available.
Distributor ID: Raspbian
Description: Raspbian GNU/Linux 9.8 (stretch)
Release: 9.8
Codename: stretch

ii  wireguard                       0.0.20190123-1               all          fast, modern, secure kernel VPN tunnel (metapackage)
ii  wireguard-dkms                  0.0.20190123-1               all          fast, modern, secure kernel VPN tunnel (DKMS version)
ii  wireguard-tools                 0.0.20190123-1               armhf        fast, modern, secure kernel VPN tunnel (userland utilities)

--
Arpit
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