`dns_watcher.sh`

51 lines
#!/usr/bin/env bash
# Watches all 21 abrams/butler domains for a nameserver flip to Cloudflare.
# Polls every 60s, logs to /tmp/dns_watch.log, and writes a one-line
# state file at /tmp/dns_watch.state. Stop with: kill $(cat /tmp/dns_watch.pid)
set -u
cd "$(dirname "$0")"

DOMAINS=(
  abramsindex.com abramsos.com abramsintel.com abramsspace.com abramsterminal.com
  abramsvc.com abramsindustries.com abramsprotection.com abramscivic.com abramslive.com
  abramsatlas.com abramsdirectory.com abramsguide.com abramslocal.com abramsmaps.com
  abramsmarkets.com abramsintelligence.com
  818butler.com beverlyhillsbutler.com bhbutler.com boulevardbutler.com
)

LOG=/tmp/dns_watch.log
STATE=/tmp/dns_watch.state
echo $$ > /tmp/dns_watch.pid

: > "$STATE"
printf "[%s] dns_watcher started for %d domains\n" "$(date '+%H:%M:%S')" "${#DOMAINS[@]}" >> "$LOG"

declare -A last_status
for d in "${DOMAINS[@]}"; do last_status[$d]="godaddy"; done

while true; do
  cf_count=0
  state_lines=""
  for d in "${DOMAINS[@]}"; do
    ns=$(dig +short +time=3 +tries=1 NS "$d" 2>/dev/null | head -1)
    if echo "$ns" | grep -q "cloudflare"; then
      status="cloudflare"
      cf_count=$((cf_count+1))
    elif echo "$ns" | grep -q "domaincontrol"; then
      status="godaddy"
    elif [ -z "$ns" ]; then
      status="no-ns"
    else
      status="other"
    fi
    if [ "${last_status[$d]}" != "$status" ]; then
      printf "[%s] %-30s %s -> %s\n" "$(date '+%H:%M:%S')" "$d" "${last_status[$d]}" "$status" >> "$LOG"
      last_status[$d]=$status
    fi
    state_lines+="$d:$status\n"
  done
  printf "[%s] %d/21 domains on cloudflare\n" "$(date '+%H:%M:%S')" "$cf_count" > "$STATE"
  printf "%b" "$state_lines" >> "$STATE"
  sleep 60
done