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install-proxy: auto-detect default-route interface for IP lookup #6

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install-proxy: auto-detect default-route interface for IP lookup #6

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9 changes: 8 additions & 1 deletion install/nginx-proxy/install-proxy.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -15,8 +15,15 @@ cd $NGINX_PROXY_AUTOMATION_PATH

# Get current IP Address
NET_INTERFACES=( eth0 ens3 ens4)

# Prefer the host's actual default-route interface so detection works
# regardless of naming (e.g. ens6 on Ubuntu 24.04 / IONOS), then fall back
# to the well-known list above for backward compatibility.
DEFAULT_IFACE=$(ip -4 route show default 2>/dev/null | awk '{print $5; exit}')
[[ -n "$DEFAULT_IFACE" ]] && NET_INTERFACES=( "$DEFAULT_IFACE" "${NET_INTERFACES[@]}" )

for i in "${NET_INTERFACES[@]}"; do
NET_IP=$(ip address show $i | grep "inet\b" | head -n 1 | awk '{print $2}' | cut -d/ -f1)
NET_IP=$(ip address show $i 2>/dev/null | grep "inet\b" | head -n 1 | awk '{print $2}' | cut -d/ -f1)
if [[ $NET_IP =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
break
fi
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