Wireguard Client Not working in latest Alpine Linux 3.23 / openresolv 3.17.0-r0

[bignay2000]

I have an Alpine Linux Server virtual machine that uses Wireguard Client to connect to a Unifi hosted Wireguard server. This worked flawlessly for over a year until upgrading to Alpine Linux 3.23.

Rebooting the server causes /etc/resolv.conf to be empty.

Restarting the wireguard client service fails because /etc/resolv.conf doesn't update back to the network dns or is empty.

https://wiki.alpinelinux.org/wiki/Configure_a_Wireguard_interface_(wg)

rc-service wg-quick.wg0 restart
 * Starting WireGuard via wg-quick(8) for wg0 ...
[#] ip link add dev wg0 type wireguard
[#] wg setconf wg0 /dev/fd/63
[#] ip -4 address add 172.16.16.8/32 dev wg0
[#] ip link set mtu 1420 up dev wg0
[#] resolvconf -a wg0 -m 0 -x
resolvconf: signature mismatch: /etc/resolv.conf
resolvconf: run `resolvconf -u` to update
[#] ip link delete dev wg0
 * Failed to start WireGuard via wg-quick(8) for wg0                                                                                                           [ !! ]
 * ERROR: wg-quick.wg0 failed to start

I downgraded the openreolv package to Alpines Linux 3.22's 3.14.1-r0 version today and things are working again. Tested rebooting the server and stop and starting the wireguard service.

vi /etc/apk/repositories

@v3.22 http://dl-cdn.alpinelinux.org/alpine/v3.22/main

apk add openresolv@v3.22

I also reproduced this issue with a bare metal Alpine Linux ISO install on the Raspberry Pi 2w.

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🔗 Similar Issues

Possible Duplicates

• Internal DNS from Wireguard file not written to resolv.conf #43

Related Issues

• Option to disable signature check in containerized setting #44
• openresolv 3.17.2 breaks archlinux netctl when multiple DNS entries are set #41
• openresolv 3.17.0-1 breaks netctl unit startup if resolv.conf has immutable attribute set. #38

👤 Suggested Assignees

• mielouk
• Mainfrezzer
• mmbossoni
• drankinatty

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[rsmarples]

This looks like a duplicate of #43.
What is the content of /etc/resolv.conf when this error happens?