Andreas WredeandClaude Opus 4.8
877fa14d0c
Starlink's USB ethernet shares a hub with the rtw89 Wi-Fi adapter; when Starlink flaps, the hub re-enumerates and tears the radio down, so hostapd loses its interface and exits. Two stock defaults left the AP dark: Restart=on-failure misses clean exits, and the 5-in-10s start limit makes systemd give up during a re-enumeration storm. - hostapd-restart.conf drop-in: Restart=always, RestartSec=5, StartLimitIntervalSec=0 so hostapd retries forever until the interface returns (verified: SIGKILL -> back to state=ENABLED in ~7s). - van-ap-watchdog daemon: backstop for the case systemd can't see (hostapd running but radio wedged). Polls hostapd_cli status; restarts hostapd if the iface is present but not ENABLED, waits it out if the iface is mid-re-enumeration. - hostapd.conf: add ctrl_interface so the watchdog can read the real AP state. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
21 lines
1004 B
Plaintext
21 lines
1004 B
Plaintext
# Drop-in: /etc/systemd/system/hostapd.service.d/restart.conf
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#
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# The AP wlan (rtw89, USB) shares a USB hub with the Starlink ethernet (r8152, USB).
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# When Starlink flaps, the hub re-enumerates and the Wi-Fi radio is torn down with it:
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# hostapd's interface vanishes ("No such device") and it exits. Two stock defaults then
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# leave the AP dark until someone intervenes — this drop-in closes both:
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#
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# 1. Restart=on-failure ignores a *clean* exit, but hostapd exits 0 in some of these
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# cases. Restart=always covers every exit.
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# 2. The default start limit (5 starts / 10s) is exhausted by a re-enumeration storm,
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# after which systemd gives up permanently. StartLimitIntervalSec=0 disables the
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# limit so hostapd keeps retrying until the interface comes back.
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[Unit]
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StartLimitIntervalSec=0
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[Service]
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Restart=always
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# A few seconds' backoff so the USB device has a chance to re-enumerate before we retry
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# (retrying instantly just fails on "No such device" and spins).
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RestartSec=5
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