132 lines
4.2 KiB
Bash
Executable File
132 lines
4.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# ─────────────────────────────────────────────────────────────
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# porkbun-ddns.sh — DDNS para carloselugo.com
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# Detecta cambio de IP pública y actualiza registros A
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# en Porkbun via editByNameType (no requiere record ID)
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#
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# Instalar:
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# sudo cp porkbun-ddns.sh /opt/scripts/
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# sudo chmod +x /opt/scripts/porkbun-ddns.sh
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#
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# Cron (cada 5 minutos):
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# sudo crontab -e
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# */5 * * * * /opt/scripts/porkbun-ddns.sh
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#
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# Log: /home/netintel/.porkbun-ddns.log
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# State: /home/netintel/.porkbun-ddns.last-ip
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# ─────────────────────────────────────────────────────────────
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source /opt/ddns/.ddns-env
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DOMAIN="carloselugo.com"
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SUBDOMAINS=("@" "gamesever1" "git") # "@" = root domain
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STATE_FILE="/home/netintel/.porkbun-ddns.last-ip"
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LOG_FILE="/home/netintel/.porkbun-ddns.log"
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API_BASE="https://api.porkbun.com/api/json/v3"
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NTFY_URL="https://ntfy.carloselugo.com/homelab"
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NTFY_USER="carlos"
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DRYRUN=0 # 1 = simula updates y envía notificación real sin tocar DNS ni state
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log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*" | tee -a "$LOG_FILE" >&2; }
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get_public_ip() {
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local ip
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ip=$(curl -4 -sf --max-time 5 https://api.ipify.org) ||
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ip=$(curl -4 -sf --max-time 5 https://ifconfig.me) ||
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ip=$(curl -4 -sf --max-time 5 https://icanhazip.com)
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echo "$ip"
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}
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get_dns_ip() {
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local subdomain="$1"
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local endpoint
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[ "$subdomain" = "@" ] && endpoint="$API_BASE/dns/retrieveByNameType/$DOMAIN/A" \
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|| endpoint="$API_BASE/dns/retrieveByNameType/$DOMAIN/A/$subdomain"
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local response
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response=$(curl -4 -sf --max-time 10 \
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-X POST "$endpoint" \
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-H "Content-Type: application/json" \
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-d "{\"apikey\":\"$API_KEY\",\"secretapikey\":\"$SECRET_KEY\"}")
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echo "$response" | grep -o '"content":"[^"]*"' | head -1 | cut -d'"' -f4
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}
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update_record() {
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local subdomain="$1"
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local new_ip="$2"
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local endpoint
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[ "$subdomain" = "@" ] && endpoint="$API_BASE/dns/editByNameType/$DOMAIN/A" \
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|| endpoint="$API_BASE/dns/editByNameType/$DOMAIN/A/$subdomain"
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local result
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result=$(curl -4 -sf --max-time 10 \
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-X POST "$endpoint" \
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-H "Content-Type: application/json" \
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-d "{\"apikey\":\"$API_KEY\",\"secretapikey\":\"$SECRET_KEY\",\"content\":\"$new_ip\",\"ttl\":\"600\"}")
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echo "$result" | grep -o '"status":"[^"]*"' | head -1 | cut -d'"' -f4
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}
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main() {
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local current_ip
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current_ip=$(get_public_ip)
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if [ -z "$current_ip" ]; then
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log "ERROR: No se pudo obtener la IP pública."
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exit 1
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fi
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# Leer última IP conocida
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local last_ip=""
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[ -f "$STATE_FILE" ] && last_ip=$(cat "$STATE_FILE")
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# Si no cambió, salir silenciosamente (DRYRUN lo omite para forzar notificación)
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if [ "$current_ip" = "$last_ip" ] && [ "$DRYRUN" != "1" ]; then
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exit 0
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fi
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log "IP cambió: ${last_ip:-'(primera ejecución)'} → $current_ip"
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local updated=0
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for subdomain in "${SUBDOMAINS[@]}"; do
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local dns_ip
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dns_ip=$(get_dns_ip "$subdomain")
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if [ "$DRYRUN" = "1" ]; then
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log " [$subdomain] [DRY RUN] ${dns_ip:-'?'} → $current_ip (sin cambios reales)"
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((updated++))
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continue
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fi
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if [ "$current_ip" = "$dns_ip" ]; then
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log " [$subdomain] Ya actualizado ($current_ip)"
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continue
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fi
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local status
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status=$(update_record "$subdomain" "$current_ip")
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if [ "$status" = "SUCCESS" ]; then
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log " [$subdomain] ✓ $dns_ip → $current_ip"
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((updated++))
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else
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log " [$subdomain] ✗ Falló. Status: ${status:-'(sin respuesta)'}"
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fi
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done
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# Guardar nueva IP en state file (DRYRUN no escribe para no alterar el estado real)
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[ "$DRYRUN" != "1" ] && echo "$current_ip" > "$STATE_FILE"
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if [ $updated -gt 0 ]; then
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log "Listo. $updated registro(s) actualizado(s)."
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curl -4 -s \
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-u "${NTFY_USER}:${NTFY_PASS}" \
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-H "Title: 🌐 IP Pública Cambió" \
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-H "Tags: warning" \
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-H "Priority: default" \
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-d "$(hostname): ${last_ip:-'primera vez'} → ${current_ip} ($updated registro(s) actualizado(s))" \
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"$NTFY_URL" > /dev/null
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fi
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}
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main |