93 lines
3.2 KiB
Bash
93 lines
3.2 KiB
Bash
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#!/bin/bash
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# Default values
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HOST=""
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PORT=22
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PASSWORD=""
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SSH_KEY=""
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USERNAME=""
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TIMEOUT=10
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WARNING=3
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CRITICAL=5
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MODE="auth"
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# Usage instructions
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usage() {
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echo "Usage: $0 -H <host> -u <username> [-p <password> | -k <ssh_key>] [-P <port>] [-t <timeout>] [-w <warning>] [-c <critical>] [-m <mode>]"
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echo
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echo " -H <host> : SSH server hostname or IP address"
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echo " -u <username> : SSH username"
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echo " -p <password> : SSH password (optional if using SSH key)"
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echo " -k <ssh_key> : Path to SSH private key (optional. \$HOME/.ssh/id_rsa is used by default)"
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echo " -P <port> : SSH port (default: 22)"
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echo " -t <timeout> : Connection timeout in seconds (default: 10)"
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echo " -w <warning> : Warning threshold for connection time in seconds (default: 3)"
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echo " -c <critical> : Critical threshold for connection time in seconds (default: 5)"
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echo " -m <mode> : Mode for testing ('auth' or 'conn', default: 'auth'. If one mode fails, try the other)"
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echo
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exit 3
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}
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# Parse arguments
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while getopts "H:P:p:k:u:t:w:c:m:" opt; do
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case $opt in
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H) HOST="$OPTARG" ;;
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P) PORT="$OPTARG" ;;
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p) PASSWORD="$OPTARG" ;;
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k) SSH_KEY="$OPTARG" ;;
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u) USERNAME="$OPTARG" ;;
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t) TIMEOUT="$OPTARG" ;;
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w) WARNING="$OPTARG" ;;
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c) CRITICAL="$OPTARG" ;;
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m) MODE="$OPTARG" ;;
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*) usage ;;
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esac
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done
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# Check if required arguments are provided
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if [ -z "$HOST" ] || [ -z "$USERNAME" ]; then
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usage
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fi
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# Use default SSH key if not specified
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if [ -z "$SSH_KEY" ]; then
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SSH_KEY="$HOME/.ssh/id_rsa"
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fi
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# Check connection
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START_TIME=$(date +%s%N)
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if [ -z "$PASSWORD" ]; then
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if [ "$MODE" == "auth" ]; then
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OUTPUT=$(ssh -q -o ConnectTimeout=$TIMEOUT -o StrictHostKeyChecking=no -o BatchMode=yes -i $SSH_KEY -p $PORT $USERNAME@$HOST "echo success" 2>&1); rc=$?
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else
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OUTPUT=$(ssh -q -o ConnectTimeout=$TIMEOUT -o StrictHostKeyChecking=no -o BatchMode=yes -o ProxyCommand="nc -w $TIMEOUT %h %p" -i $SSH_KEY -p $PORT $USERNAME@$HOST 2>&1); rc=$?
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fi
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else
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if [ "$MODE" == "auth" ]; then
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OUTPUT=$(sshpass -p "$PASSWORD" ssh -q -o ConnectTimeout=$TIMEOUT -o StrictHostKeyChecking=no -o BatchMode=yes -p $PORT $USERNAME@$HOST "echo success" 2>&1); rc=$?
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else
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OUTPUT=$(sshpass -p "$PASSWORD" ssh -q -o ConnectTimeout=$TIMEOUT -o StrictHostKeyChecking=no -o BatchMode=yes -o ProxyCommand="nc -w $TIMEOUT %h %p" -p $PORT $USERNAME@$HOST 2>&1); rc=$?
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fi
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fi
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END_TIME=$(date +%s%N)
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ELAPSED_TIME=$(echo "scale=3; ($END_TIME - $START_TIME) / 1000000000" | bc)
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ELAPSED_TIME_MS=$(echo "scale=0; ($END_TIME - $START_TIME) / 1000000" | bc)
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# Check result
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perfdata="response_time=${ELAPSED_TIME_MS}ms;${WARNING};${CRITICAL};0;;"
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if [[ $MODE == "auth" && $OUTPUT == "success" ]] || [[ $MODE == "conn" && $rc -eq 0 ]]; then
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if (( $(echo "$ELAPSED_TIME > $CRITICAL" | bc -l) )); then
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echo "CRITICAL - connected to $HOST in $ELAPSED_TIME seconds | $perfdata"
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exit 2
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elif (( $(echo "$ELAPSED_TIME > $WARNING" | bc -l) )); then
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echo "WARNING - connected to $HOST in $ELAPSED_TIME seconds | $perfdata"
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exit 1
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else
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echo "OK - connected to $HOST in $ELAPSED_TIME seconds | $perfdata"
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exit 0
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fi
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else
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echo -e "CRITICAL - failed to connect to $HOST. Return code was $rc\n$OUTPUT"
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exit 2
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fi
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