check_inet_iface_curl.sh,check_inet_iface_ping.sh: Redesign: add support fpr restart service and reboot system.
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@@ -1,66 +1,251 @@
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#!/usr/bin/env bash
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# Prüft ein Interface gegen drei Internet-Ziele.
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# Es wird nur dann ein Fehler gemeldet, wenn alle drei Ziele nicht erreichbar sind.
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# Zudem erfolgt die Meldung erst beim zweiten aufeinanderfolgenden Offline-Test.
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set -euo pipefail
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# Testet ein Interface mit curl gegen mehrere HTTP/HTTPS-Ziele.
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# Online, sobald mindestens EIN Ziel funktioniert.
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# Offline erst, wenn ALLE Ziele fehlschlagen.
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# Erst der zweite Offline-Fall in Folge erzeugt Meldung + ggf. Aktion.
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#
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# Aufruf: check_inet_iface.sh <interface>
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# Usage:
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# check_inet_iface_curl.sh <interface> [--service NAME | --reboot] [--state-dir DIR]
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# [--max-time SEC] [-h|--help]
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IFACE="$1"
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IFACE="${1:-}"
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shift || true
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# Drei Ziele, beliebig anpassbar (IPs oder Hostnames)
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TARGETS=("1.1.1.1" "8.8.8.8" "www.debian.org" "oopen.de")
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# Ziele - echte TCP/HTTPS-Tests
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TARGETS=(
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"oopen.de"
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"1.1.1.1"
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"8.8.8.8"
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"www.debian.org"
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)
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PING_BIN="/bin/ping"
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TIMEOUT_BIN="/usr/bin/timeout"
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DATE_BIN="/bin/date"
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PING_BIN="$(command -v ping)"
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DATE_BIN="$(command -v date)"
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TIMEOUT_BIN="$(command -v timeout)"
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STATE_DIR="/var/run/check_inet"
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STATE_FILE="$STATE_DIR/$IFACE.fail"
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STATE_DIR="/run/check_inet"
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MAX_TIME=8
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SERVICE=""
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DO_REBOOT=0
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mkdir -p "$STATE_DIR"
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# terminal detection
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IS_TTY=0
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if [[ -t 1 || -t 2 ]]; then IS_TTY=1; fi
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if [ -z "$IFACE" ]; then
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echo "Usage: $0 <interface>" >&2
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exit 2
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# colors (TTY only)
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if [[ $IS_TTY -eq 1 ]]; then
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RED=$'\e[31m'; GREEN=$'\e[32m'; YELLOW=$'\e[33m'; BOLD=$'\e[1m'; RESET=$'\e[0m'
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else
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RED=""; GREEN=""; YELLOW=""; BOLD=""; RESET=""
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fi
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# ----------------------------------------------------------
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# Funktion: Teste ein Ziel über das Interface
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# ----------------------------------------------------------
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test_target() {
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local target="$1"
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$TIMEOUT_BIN 10 $PING_BIN -I "$IFACE" -c 2 -W 2 "$target" >/dev/null 2>&1
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return $?
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usage() {
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cat <<'USAGE'
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check_inet_iface_curl.sh - prüft Konnektivität per curl über ein bestimmtes Interface.
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Usage:
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check_inet_iface_curl.sh <interface> [--restart-service NAME | --reboot] [--state-dir DIR]
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[--max-time SEC] [-h|--help]
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Optionen:
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--restart-service NAME systemd-Service bei 2x OFFLINE in Folge neu starten
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--reboot bei 2x OFFLINE in Folge System rebooten
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--state-dir DIR State-Verzeichnis (Default: /run/check_inet)
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--max-time SEC curl Timeout pro Ziel (Default: 8)
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-h, --help Hilfe
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Verhalten:
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- Im Terminal: grün "OK" bei Erfolg, rot "FAILED" bei 2x OFFLINE + Details.
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- Als Cron (kein TTY): bei Erfolg keine Ausgabe; bei 2x OFFLINE Meldung auf stderr
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(damit Cron eine Mail erzeugen kann).
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Exit-Codes:
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0 = online / OK (oder 1. Offline nur gemerkt)
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1 = 2x offline in Folge (Fehler + ggf. Aktion)
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3 = Aktion fehlgeschlagen
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USAGE
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}
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# ----------------------------------------------------------
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# Alle drei Ziele testen
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# ----------------------------------------------------------
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clean_up() {
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FAILED=0
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# Perform program exit housekeeping
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blank_line
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exit $1
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}
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for TG in "${TARGETS[@]}"; do
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test_target "$TG"
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if [ $? -ne 0 ]; then
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FAILED=$((FAILED + 1))
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fi
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log_info() {
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if [[ $IS_TTY -eq 1 ]] ; then
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echo -e "$*";
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fi
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}
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log_err() { echo -e "$*" >&2; }
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die() { log_err "${RED}${BOLD}ERROR:${RESET} $*"; exit 64; }
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blank_line() {
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if [[ $IS_TTY -eq 1 ]] ; then
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echo ""
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fi
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}
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# -----------------------------
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# args
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# -----------------------------
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--restart-service)
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[[ $# -ge 2 ]] || die "--restart-service braucht ein Argument"
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SERVICE="$2"
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shift 2
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;;
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--reboot)
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DO_REBOOT=1
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shift
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;;
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--state-dir)
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[[ $# -ge 2 ]] || die "--state-dir braucht ein Argument"
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STATE_DIR="$2"
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shift 2
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;;
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--max-time)
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[[ $# -ge 2 ]] || die "--max-time braucht ein Argument"
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MAX_TIME="$2"
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shift 2
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;;
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-h|--help)
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usage
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clean_up 0
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;;
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*)
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die "Unbekannte Option: $1 (verwende -h)"
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;;
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esac
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done
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# Wenn mindestens ein Ziel erreichbar ist → online
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if [ $FAILED -lt 3 ]; then
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# Erfolg: State zurücksetzen
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[ -f "$STATE_FILE" ] && rm -f "$STATE_FILE"
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exit 0
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if [[ -z "$IFACE" ]]; then
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usage >&2
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clean_up 2
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fi
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# Wenn alle Ziele fehlschlagen → offline
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if [ -f "$STATE_FILE" ]; then
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# Zweiter Fehlschlag → Meldung
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TS="$($DATE_BIN '+%F %T')"
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echo "$TS - Interface $IFACE: Internet nicht erreichbar (Targets: ${TARGETS[*]})!" >&2
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exit 1
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else
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# Erster Fehlschlag - Still, aber State setzen
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touch "$STATE_FILE"
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exit 0
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if [[ -n "$SERVICE" && $DO_REBOOT -eq 1 ]]; then
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die "--restart-service und --reboot schließen sich aus"
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fi
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STATE_FILE="$STATE_DIR/$IFACE.fail"
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mkdir -p "$STATE_DIR"
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# lock gegen parallele cron-runs
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LOCK_FD=9
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LOCK_FILE="$STATE_FILE.lock"
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exec {LOCK_FD}>"$LOCK_FILE" || true
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if command -v flock >/dev/null 2>&1; then
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flock -n "$LOCK_FD" || clean_up 0
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fi
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# ------------------------------------------
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# Funktion: Testet ein HTTP(S)-Ziel
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# ------------------------------------------
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test_target() {
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local target="$1"
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$TIMEOUT_BIN $MAX_TIME $PING_BIN -I "$IFACE" -c 2 -W 2 "$target" >/dev/null 2>&1
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}
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# ------------------------------------------
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# Tests
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# ------------------------------------------
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TOTAL="${#TARGETS[@]}"
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FAILED=0
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blank_line || true
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log_info " Interface: \033[17G$IFACE"
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log_info " Targets (${TOTAL}):\033[17G${TARGETS[*]}"
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log_info " ping:\033[17G$PING_BIN timeout: ${MAX_TIME}s"
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blank_line || true
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for TG in "${TARGETS[@]}"; do
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if test_target "$TG"; then
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log_info " ${GREEN}OK${RESET} $TG"
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break;
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else
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FAILED=$((FAILED + 1))
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log_info " ${YELLOW}FAIL${RESET} $TG"
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fi
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done
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# Wenn mindestens EIN Ziel funktioniert -> online
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if [[ $FAILED -lt $TOTAL ]]; then
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[[ -f "$STATE_FILE" ]] && rm -f "$STATE_FILE"
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if [[ $IS_TTY -eq 1 ]]; then
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echo ""
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echo -e " ${GREEN}${BOLD}OK${RESET} - Interface ${IFACE}: mindestens ein Ziel erreichbar."
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fi
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clean_up 0
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fi
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# Alle Ziele fail -> offline
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# Erst beim zweiten Mal melden/handeln
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TS="$("$DATE_BIN" '+%F %T')"
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if [[ -f "$STATE_FILE" ]]; then
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if [[ $IS_TTY -eq 1 ]]; then
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log_err ""
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log_err " ${RED}${BOLD}FAILED${RESET} - ${TS} - Interface ${IFACE}: TCP/HTTP(S) Verbindungen nicht erreichbar!
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(curl; Targets: ${TARGETS[*]})"
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log_err ""
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else
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log_err ""
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log_err " ${TS} - Interface ${IFACE}: PING Verbindungen nicht erreichbar!"
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fi
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# Aktion
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if [[ -n "$SERVICE" ]]; then
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log_info " ${YELLOW}Restart Service ${BOLD}$SERVICE${RESET}"
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log_info ""
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if systemctl restart "$SERVICE" >/dev/null 2>&1; then
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if [[ $IS_TTY -eq 1 ]] ; then
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log_err " ${GREEN}Service neugestartet:${RESET} $SERVICE"
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else
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log_err " ${TS} - Service neugestartet: $SERVICE"
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log_err ""
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fi
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clean_up 1
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else
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if [[ $IS_TTY -eq 1 ]] ; then
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log_err " ${RED}Service-Restart fehlgeschlagen:${RESET} $SERVICE"
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else
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log_err ""
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log_err " ${TS} - Service-Restart fehlgeschlagen: $SERVICE"
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log_err ""
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fi
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clean_up 3
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fi
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elif [[ $DO_REBOOT -eq 1 ]]; then
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if [[ $IS_TTY -eq 1 ]]; then
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log_err " ${YELLOW}${BOLD}Resboot machine NOW!${RESET}"
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log_err ""
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else
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log_err " ${TS} - Resboot machine NOW!"
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log_err ""
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fi
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/sbin/reboot >/dev/null 2>&1 || { log_err "${RED}Reboot fehlgeschlagen.${RESET}"; clean_up 3; }
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clean_up 1
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fi
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#clean_up 1
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else
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# Erster Offline-Fall -> noch keine Meldung
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touch "$STATE_FILE"
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if [[ $IS_TTY -eq 1 ]]; then
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log_info ""
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log_info " ${YELLOW}${BOLD}WARN${RESET} - Interface ${IFACE} offline (das erste mal - noch keine Aktion/Meldung)."
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else
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log_err " ${TS} - Interface ${IFACE} offline (first time - no action started)"
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fi
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clean_up 0
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fi
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