Oier Bravo Urtasun
8eeda1265c
Self-contained host-network Avahi container publishes the service names over mDNS so .local works zero-config for guests (macOS/Linux native, Windows needs Bonjour). Toggle with ENABLE_MDNS=true + BASE_DOMAIN=*.local; build-stack layers docker-compose.avahi.yml in and builds the image during --prep. mDNS can't serve the air-gap upstream spoofs (non-.local) — those still need real DNS. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
33 lines
1.0 KiB
Bash
Executable File
33 lines
1.0 KiB
Bash
Executable File
#!/bin/sh
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# Publish A records for the stack's service names over mDNS (.local).
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# Requires host networking (mDNS is link-local multicast). One avahi-publish
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# per name; if any dies the container exits so Docker restarts it.
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set -eu
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: "${BASE_DOMAIN:?BASE_DOMAIN unset}"
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: "${HOST_LAN_IP:?HOST_LAN_IP unset}"
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case "$BASE_DOMAIN" in
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*.local) ;;
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*) echo "WARN: mDNS resolves only .local — BASE_DOMAIN=$BASE_DOMAIN will NOT be discoverable via avahi. Set BASE_DOMAIN=*.local to use mDNS." >&2 ;;
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esac
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mkdir -p /run/dbus
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rm -f /run/dbus/pid /run/dbus/system_bus_socket 2>/dev/null || true
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dbus-daemon --system
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for _ in 1 2 3 4 5; do [ -S /run/dbus/system_bus_socket ] && break; sleep 1; done
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avahi-daemon --daemonize --no-chroot
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sleep 2
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pids=""
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for n in "$BASE_DOMAIN" "auth.$BASE_DOMAIN" "packwiz.$BASE_DOMAIN" "mc.$BASE_DOMAIN"; do
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echo "mDNS publish: $n -> $HOST_LAN_IP"
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avahi-publish -a "$n" "$HOST_LAN_IP" &
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pids="$pids $!"
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done
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# Block on the publishers; exit (→ restart) if one drops.
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# shellcheck disable=SC2086
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wait -n $pids 2>/dev/null || wait
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