Public bug reported: There appears to be a race condition during boot on Ubuntu 24.04.3 LTS (GNU/Linux 6.14.0-1013-oracle x86_64), where [email protected] starts before the network is fully up, resulting in intermittent WireGuard initialization failures.
Observed behavior: [email protected] fails on cold boots. Manually restarting the service (systemctl restart wg-quick@wg0) after boot succeeds. Journal logs suggest that network-online.target has not yet been reached when wg-quick@wg0 starts. Environment: Ubuntu 24.04.3 LTS (Oracle Cloud image) Linux kernel 6.14.0-1013-oracle WireGuard installed via apt netfilter-persistent active (firewall rules applied at boot) Steps to reproduce: Create a standard WireGuard interface (wg0.conf under /etc/wireguard/). Enable the service: sudo systemctl enable wg-quick@wg0 Reboot the system. Observe that wg show returns “interface not found” after boot, requiring a manual restart. Additional context: A community discussion identified this as a systemd startup order race condition between network-online.target, firewall initialization, and WireGuard. See discussion and diagnostics here: 👉 https://discourse.ubuntu.com/t/suspected-race-condition-error-in-systemd-startup-order/69668 Workarounds tested: Adding After=network-online.target and ExecStartPre dependency to the unit file (partial success). Introducing an artificial delay using ExecStartPre=/bin/sleep 10 (works reliably, but not ideal). Using a systemd override dependency or custom rc.local script to restart wg-quick@wg0 after networking (works consistently). These resolve the symptom but not the root cause. A long-term fix may require adjusting default dependency ordering between network-online.target and [email protected] or related cloud-init/systemd-networkd units on Oracle Cloud images. ** Affects: ubuntu Importance: Undecided Status: New ** Affects: systemd (Ubuntu) Importance: Undecided Status: New ** Tags: systemd ** Also affects: systemd (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2128680 Title: Race condition in systemd startup order causes WireGuard to fail at boot on Ubuntu 24.04.3 (Oracle Cloud image) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/2128680/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
