traccar connections to cloudwatch

connection_count_to_cloudwatch.sh

NAMESPACE="Traccar"
INTERVAL=600
REGION="us-east-1"
while true; do   
    date;   
    total=$(ss -tanH | wc -l);   
    echo "Total connections: $total";    
    aws cloudwatch put-metric-data     --namespace "$NAMESPACE"     --metric-name "Connections"     --value "$total"     --unit "Count"     --region "$REGION";


# 1) Build a set of listening TCP ports (authoritative)
LISTEN_PORTS="$(ss -tlnH | awk '
  {
    addr=$4
    # Extract last :PORT at end (works for IPv4 and [IPv6]:PORT)
    if (match(addr, /:([0-9]+)$/, m)) print m[1]
  }' | sort -u)"

# 2) Feed those ports into awk and classify lsof connections
#    Incoming: local port is in LISTEN set
#    Outgoing: otherwise (group by remote port)
lsof -nP -iTCP -sTCP:ESTABLISHED \
| awk -v ports="$LISTEN_PORTS" '
  BEGIN {
    n = split(ports, a, "\n")
    for (i=1; i<=n; i++) if (a[i] != "") listen[a[i]] = 1
  }

  {
    name = $9  # NAME column: localIP:localPort->remoteIP:remotePort
    if (match(name, /^(.*):([0-9]+)->(.*):([0-9]+)$/, m)) {
      lport = m[2]
      rport = m[4]
      total++

      if (lport in listen) {
        incoming[lport]++
        inc_total++
      } else {
        outgoing[rport]++
        out_total++
      }
    }
  }

  END {
    print "TOTAL ESTABLISHED TCP CONNECTIONS:", total
    print ""

    print "INCOMING (to local listening ports):"
    for (p in incoming) printf "%6d  local-port %s\n", incoming[p], p

    print ""
    print "OUTGOING (to remote ports):"
    for (p in outgoing) printf "%6d  remote-port %s\n", outgoing[p], p

    print ""
    print "INCOMING TOTAL:", inc_total
    print "OUTGOING TOTAL:", out_total
  }
'