106 lines
2.8 KiB
Bash
106 lines
2.8 KiB
Bash
#!/bin/bash
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mkdir -p /var/log/monitoring
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LOG="/var/log/monitoring/elab-monitor.log"
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ssh_connection=(${SSH_CONNECTION})
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SSH_SOURCE_IP="${ssh_connection[0]}:${ssh_connection[1]}"
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log() {
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printf "%s [%s] %s - %s\n" \
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"$(date --rfc-3339=seconds)" "$$" "$SSH_SOURCE_IP" "$*" \
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>> "$LOG"
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}
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log "NEW MONITORING CONNECTION"
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ident="$1"
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log "IDENTIFIED AS $ident"
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reject() {
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log "REJECTED: $SSH_ORIGINAL_COMMAND"
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# echo "ORIG: $SSH_ORIGINAL_COMMAND" >&2
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echo "Your command has been rejected and reported to sys admin." >&2
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exit 1
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}
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## TODO: check how it’s made in the original script
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# sudo /usr/local/sbin/ssh-update-keys
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if [[ "$SSH_ORIGINAL_COMMAND" =~ [\&\(\{\;\<\>\`\$\}] ]]; then
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log "BAD CHARS DETECTED"
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# echo "Bad chars: $SSH_ORIGINAL_COMMAND" >&2
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reject
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fi
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disk_size() {
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val=$(df | awk '/\/$/ {print $2}') # Retrieves the total disk size of the root filesystem
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echo "$val"
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}
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disk_available() {
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val=$(df | awk '/\/$/ {print $4}') # Retrieves the available disk space of the root filesystem
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echo "$val"
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}
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disk_used() {
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val=$(df | awk '/\/$/ {print $3}') # Retrieves the used disk space of the root filesystem
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echo "$val"
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}
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disk_used_percent() {
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val=$(df | awk '/\/$/ {print $5}') # Retrieves the percentage of used disk space of the root filesystem
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echo "$val"
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}
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disk_available_percent() {
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val=$(df | awk '/\/$/ {print $4}') # Retrieves the percentage of available disk space of the root filesystem
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echo "$val"
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}
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memory_size() {
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val=$(free | awk '/Mem:/ {print $2}') # Retrieves the total memory size
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echo "$val"
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}
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memory_available() {
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val=$(free | awk '/Mem:/ {print $7}') # Retrieves the available memory
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echo "$val"
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}
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memory_used() {
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val=$(free | awk '/Mem:/ {print $3}') # Retrieves the used memory
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echo "$val"
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}
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memory_used_percent() {
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val=$(free | awk '/Mem:/ {printf "%.2f\n", (($2 - $7) / $2) * 100}') # Calculates the percentage of used memory
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echo "$val"
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}
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memory_available_percent() {
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val=$(free | awk '/Mem:/ {printf "%.2f\n", ($7 / $2) * 100}') # Calculates the percentage of available memory
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echo "$val"
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}
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## ---- MAIN ----
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if [[ $SSH_ORIGINAL_COMMAND =~ ^[a-zA-Z0-9_]+$ ]]; then
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log "ACCEPTED monitoring COMMAND : $SSH_ORIGINAL_COMMAND"
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case "$SSH_ORIGINAL_COMMAND" in
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disk_size) disk_size ;;
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disk_available) disk_available ;;
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disk_used) disk_used ;;
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disk_used_percent) disk_used_percent ;;
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disk_available_percent) disk_available_percent ;;
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memory_size) memory_size ;;
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memory_available) memory_available ;;
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memory_used) memory_used ;;
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memory_used_percent) memory_used_percent ;;
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memory_available_percent) memory_available_percent ;;
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*) reject ;;
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esac
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else
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reject
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fi |