chiefgeek
a1a17e81a1
Includes updated JS challenge scripts with Claude-User whitelist, same-site referer bypass, Blackbox-Exporter allowed bot, and all new exporters, cheat sheets, and automation scripts.
727 lines
20 KiB
Bash
727 lines
20 KiB
Bash
#!/bin/bash
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################################################################################
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# Script Name: nfs-exporter.sh
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# Version: 1.0
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# Description: Prometheus exporter for NFS client metrics — mount status, RPC
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# retransmits, stale file handles, read/write latency, transfer
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# bytes, operation counts, timeouts, and mount options
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#
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# Author: Phil Connor
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# Contact: contact@mylinux.work
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# Website: https://mylinux.work
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# License: MIT
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#
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# Prerequisites:
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# - NFS client mounts active
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# - /proc/self/mountstats available
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# - /proc/net/rpc/nfs available
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# - netcat (nc) for HTTP mode
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#
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# Usage:
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# ./nfs-exporter.sh
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# ./nfs-exporter.sh --http -p 9587
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# ./nfs-exporter.sh --textfile
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#
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# Metrics Exported:
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# - nfs_up - Exporter status (1=up, 0=down)
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# - nfs_mount_up{mount,server,export} - Mount status
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# - nfs_mount_info{mount,server,export,version,proto} - Mount configuration
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# - nfs_mount_age_seconds{mount} - Seconds since mount was established
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# - nfs_rpc_retransmits_total - Total RPC retransmits
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# - nfs_rpc_auth_refreshes_total - Total RPC auth refreshes
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# - nfs_mount_stale_handles_total{mount} - Stale file handle count
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# - nfs_mount_read_bytes_total{mount} - Total bytes read
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# - nfs_mount_write_bytes_total{mount} - Total bytes written
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# - nfs_mount_read_ops_total{mount} - Total read operations
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# - nfs_mount_write_ops_total{mount} - Total write operations
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# - nfs_mount_read_latency_seconds{mount} - Cumulative read latency
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# - nfs_mount_write_latency_seconds{mount} - Cumulative write latency
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# - nfs_mount_getattr_ops_total{mount} - Total GETATTR operations
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# - nfs_mount_access_ops_total{mount} - Total ACCESS operations
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# - nfs_mount_lookup_ops_total{mount} - Total LOOKUP operations
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# - nfs_mount_readdir_ops_total{mount} - Total READDIR operations
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# - nfs_mount_timeouts_total{mount} - Total operation timeouts
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# - nfs_mounts_total - Total number of NFS mounts
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# - nfs_exporter_duration_seconds - Script execution time
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# - nfs_exporter_last_run_timestamp - Last successful run time
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#
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# Configuration:
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# Default HTTP port: 9587
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# Textfile directory: /var/lib/node_exporter
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#
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################################################################################
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set -o pipefail
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# ============================================================================
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# CONFIGURATION VARIABLES
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# ============================================================================
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TEXTFILE_DIR="/var/lib/node_exporter"
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OUTPUT_FILE=""
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HTTP_MODE=false
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HTTP_PORT=9587
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LOCK_FILE="/tmp/nfs-exporter.lock"
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MOUNTSTATS="/proc/self/mountstats"
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RPC_NFS="/proc/net/rpc/nfs"
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# ============================================================================
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# LOGGING FUNCTIONS
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# ============================================================================
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RED='\033[0;31m'
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YELLOW='\033[1;33m'
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GREEN='\033[0;32m'
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NC='\033[0m'
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log() { echo -e "${GREEN}[INFO]${NC} $*" >&2; }
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warn() { echo -e "${YELLOW}[WARN]${NC} $*" >&2; }
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error(){ echo -e "${RED}[ERROR]${NC} $*" >&2; }
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# ============================================================================
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# HELPER FUNCTIONS
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# ============================================================================
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show_usage() {
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cat <<EOF
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Usage: $0 [OPTIONS]
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Export NFS client statistics as Prometheus metrics.
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MODES:
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--textfile Write to node_exporter textfile collector
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--http Run HTTP server on port $HTTP_PORT
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OPTIONS:
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-p, --port HTTP port (default: 9587)
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-o, --output Output file path
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EXAMPLES:
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$0 --textfile
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$0 --http --port 9587
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$0 -o /tmp/nfs.prom
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EOF
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exit 0
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}
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parse_args() {
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while [[ $# -gt 0 ]]; do
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case $1 in
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-h|--help) show_usage ;;
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--textfile) OUTPUT_FILE="$TEXTFILE_DIR/nfs.prom"; shift ;;
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--http) HTTP_MODE=true; shift ;;
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-p|--port) HTTP_PORT="$2"; shift 2 ;;
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-o|--output) OUTPUT_FILE="$2"; shift 2 ;;
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*) error "Unknown option: $1"; exit 1 ;;
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esac
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done
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}
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acquire_lock() {
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if [ -f "$LOCK_FILE" ]; then
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local lock_pid
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lock_pid=$(cat "$LOCK_FILE" 2>/dev/null)
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if [ -n "$lock_pid" ] && kill -0 "$lock_pid" 2>/dev/null; then
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error "Another instance is running (PID $lock_pid)"
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return 1
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fi
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rm -f "$LOCK_FILE"
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fi
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echo $$ > "$LOCK_FILE"
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trap 'rm -f "$LOCK_FILE"' EXIT
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return 0
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}
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# Check if NFS client data is available
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check_nfs() {
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if [ ! -f "$MOUNTSTATS" ]; then
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error "$MOUNTSTATS not found"
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return 1
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fi
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# Check for at least one NFS mount
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if ! grep -q "nfs" /proc/mounts 2>/dev/null; then
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warn "No NFS mounts found"
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return 1
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fi
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return 0
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}
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# Get list of NFS mount points from /proc/mounts
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# Returns: Lines with "server:export mountpoint nfsversion"
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get_nfs_mounts() {
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awk '$3 ~ /^nfs/ { print $1, $2, $3 }' /proc/mounts 2>/dev/null
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}
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# Parse mountstats for a specific mount point
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# Args: $1 - mount point
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# Returns: Associative data from /proc/self/mountstats
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get_mountstats_block() {
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local mount="$1"
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awk -v mp="$mount" '
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/^device .* mounted on / {
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if (index($0, "mounted on " mp " ") > 0 || $0 ~ "mounted on " mp "$") {
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found=1
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} else {
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found=0
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}
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}
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found { print }
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' "$MOUNTSTATS" 2>/dev/null
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}
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# Extract NFS version from mount options
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# Args: $1 - mount point
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# Returns: NFS version string (e.g., "4.2", "3")
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get_nfs_version() {
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local mount="$1"
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local vers
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vers=$(awk -v mp="$mount" '$3 ~ /^nfs/ && $2 == mp { print $4 }' /proc/mounts 2>/dev/null | head -1)
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# Extract version from mount options
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local ver
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ver=$(echo "$vers" | grep -oE 'vers=[0-9.]+' | cut -d= -f2)
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if [ -z "$ver" ]; then
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# Try from mountstats
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ver=$(get_mountstats_block "$mount" | grep -oE 'vers=[0-9.]+' | head -1 | cut -d= -f2)
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fi
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if [ -z "$ver" ]; then
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# Fall back to fstype
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local fstype
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fstype=$(awk -v mp="$mount" '$2 == mp { print $3 }' /proc/mounts 2>/dev/null | head -1)
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case "$fstype" in
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nfs4) ver="4" ;;
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nfs) ver="3" ;;
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*) ver="unknown" ;;
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esac
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fi
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echo "$ver"
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}
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# Extract protocol from mount options
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# Args: $1 - mount point
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# Returns: Protocol (tcp/udp)
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get_nfs_proto() {
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local mount="$1"
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local proto
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proto=$(get_mountstats_block "$mount" | grep -oE 'proto=[a-z0-9]+' | head -1 | cut -d= -f2)
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echo "${proto:-tcp}"
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}
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# Parse per-operation stats from mountstats
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# Args: $1 - mount point, $2 - operation name (READ, WRITE, GETATTR, etc.)
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# Returns: "ops transmits timeouts bytes_sent bytes_recv queue_time rtt_time exec_time"
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get_op_stats() {
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local mount="$1"
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local op="$2"
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get_mountstats_block "$mount" | awk -v op="$op:" '
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$1 == op {
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# Fields: op ops transmits timeouts bytes_sent bytes_recv queue rtt exec
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printf "%s %s %s %s %s %s %s %s", $2, $3, $4, $5, $6, $7, $8, $9
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exit
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}
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' 2>/dev/null
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}
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# Get total bytes read for a mount from mountstats
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# Args: $1 - mount point
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# Returns: Total bytes read
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get_read_bytes() {
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local mount="$1"
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local stats
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stats=$(get_op_stats "$mount" "READ")
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local bytes_recv
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bytes_recv=$(echo "$stats" | awk '{print $5}')
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echo "${bytes_recv:-0}"
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}
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# Get total bytes written for a mount from mountstats
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# Args: $1 - mount point
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# Returns: Total bytes written
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get_write_bytes() {
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local mount="$1"
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local stats
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stats=$(get_op_stats "$mount" "WRITE")
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local bytes_sent
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bytes_sent=$(echo "$stats" | awk '{print $4}')
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echo "${bytes_sent:-0}"
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}
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# Get operation count for a specific NFS operation
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# Args: $1 - mount point, $2 - operation name
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# Returns: Operation count
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get_op_count() {
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local mount="$1"
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local op="$2"
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local stats
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stats=$(get_op_stats "$mount" "$op")
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local ops
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ops=$(echo "$stats" | awk '{print $1}')
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echo "${ops:-0}"
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}
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# Get cumulative latency for a specific operation (execution time in milliseconds)
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# Args: $1 - mount point, $2 - operation name
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# Returns: Cumulative execution time in seconds
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get_op_latency() {
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local mount="$1"
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local op="$2"
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local stats
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stats=$(get_op_stats "$mount" "$op")
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local exec_ms
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exec_ms=$(echo "$stats" | awk '{print $8}')
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if [ -n "$exec_ms" ] && [ "$exec_ms" != "0" ]; then
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awk "BEGIN {printf \"%.6f\", ${exec_ms} / 1000}" 2>/dev/null || echo "0"
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else
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echo "0"
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fi
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}
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# Get timeout count for a specific operation
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# Args: $1 - mount point, $2 - operation name
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# Returns: Timeout count
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get_op_timeouts() {
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local mount="$1"
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local op="$2"
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local stats
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stats=$(get_op_stats "$mount" "$op")
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local timeouts
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timeouts=$(echo "$stats" | awk '{print $3}')
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echo "${timeouts:-0}"
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}
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# Get total timeouts across all operations for a mount
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# Args: $1 - mount point
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# Returns: Total timeout count
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get_total_timeouts() {
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local mount="$1"
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get_mountstats_block "$mount" | awk '
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/^[[:space:]]+[A-Z]+:/ {
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timeouts += $4
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}
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END { print timeouts+0 }
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' 2>/dev/null
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}
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# Get stale file handle count from mountstats events
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# Args: $1 - mount point
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# Returns: Stale file handle count
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get_stale_handles() {
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local mount="$1"
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local count
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count=$(get_mountstats_block "$mount" | grep -oE 'badxid=[0-9]+' | cut -d= -f2)
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if [ -z "$count" ]; then
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# Try dmesg for stale NFS handle messages for this mount
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count=$(dmesg 2>/dev/null | grep -c "Stale file handle" | head -1)
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fi
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echo "${count:-0}"
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}
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# Get RPC retransmits from /proc/net/rpc/nfs
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# Returns: Total retransmits
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get_rpc_retransmits() {
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if [ -f "$RPC_NFS" ]; then
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# Line starting with "rpc" has: rpc count retrans authrefresh
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awk '/^rpc / { print $3 }' "$RPC_NFS" 2>/dev/null
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else
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echo "0"
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fi
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}
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# Get RPC auth refreshes from /proc/net/rpc/nfs
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# Returns: Total auth refreshes
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get_rpc_auth_refreshes() {
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if [ -f "$RPC_NFS" ]; then
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awk '/^rpc / { print $4 }' "$RPC_NFS" 2>/dev/null
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else
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echo "0"
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fi
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}
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# Get mount age in seconds
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# Args: $1 - mount point
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# Returns: Seconds since mount was established
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get_mount_age() {
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local mount="$1"
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local age
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age=$(get_mountstats_block "$mount" | awk '/age:/ { print $2; exit }')
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echo "${age:-0}"
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}
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# ============================================================================
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# METRIC GENERATION
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# ============================================================================
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generate_metrics() {
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local script_start
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script_start=$(date +%s)
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if ! check_nfs; then
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cat <<EOF
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# HELP nfs_up NFS exporter status
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# TYPE nfs_up gauge
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nfs_up 0
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EOF
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return
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fi
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cat <<EOF
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# HELP nfs_up NFS exporter status
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# TYPE nfs_up gauge
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nfs_up 1
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EOF
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local mount_count=0
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# Collect mount list
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local mounts
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mounts=$(get_nfs_mounts)
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if [ -z "$mounts" ]; then
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cat <<EOF
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# HELP nfs_mounts_total Total number of NFS mounts
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# TYPE nfs_mounts_total gauge
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nfs_mounts_total 0
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EOF
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return
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fi
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# Mount status
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cat <<EOF
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# HELP nfs_mount_up Mount status (1=mounted, 0=down)
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# TYPE nfs_mount_up gauge
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EOF
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while IFS=' ' read -r device mountpoint fstype; do
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[ -z "$mountpoint" ] && continue
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local server export_path
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server="${device%%:*}"
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export_path="${device#*:}"
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echo "nfs_mount_up{mount=\"$mountpoint\",server=\"$server\",export=\"$export_path\"} 1"
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mount_count=$((mount_count + 1))
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done <<< "$mounts"
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echo ""
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# Mount info
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cat <<EOF
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# HELP nfs_mount_info Mount configuration information
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# TYPE nfs_mount_info gauge
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EOF
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while IFS=' ' read -r device mountpoint fstype; do
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[ -z "$mountpoint" ] && continue
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local server export_path version proto
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server="${device%%:*}"
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export_path="${device#*:}"
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version=$(get_nfs_version "$mountpoint")
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proto=$(get_nfs_proto "$mountpoint")
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echo "nfs_mount_info{mount=\"$mountpoint\",server=\"$server\",export=\"$export_path\",version=\"$version\",proto=\"$proto\"} 1"
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done <<< "$mounts"
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echo ""
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# Mount age
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cat <<EOF
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# HELP nfs_mount_age_seconds Seconds since mount was established
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# TYPE nfs_mount_age_seconds gauge
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EOF
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while IFS=' ' read -r device mountpoint fstype; do
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[ -z "$mountpoint" ] && continue
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local age
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age=$(get_mount_age "$mountpoint")
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echo "nfs_mount_age_seconds{mount=\"$mountpoint\"} $age"
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done <<< "$mounts"
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echo ""
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# RPC stats
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local rpc_retrans rpc_auth
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rpc_retrans=$(get_rpc_retransmits)
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rpc_auth=$(get_rpc_auth_refreshes)
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cat <<EOF
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# HELP nfs_rpc_retransmits_total Total RPC retransmissions
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# TYPE nfs_rpc_retransmits_total counter
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nfs_rpc_retransmits_total ${rpc_retrans:-0}
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# HELP nfs_rpc_auth_refreshes_total Total RPC authentication refreshes
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# TYPE nfs_rpc_auth_refreshes_total counter
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nfs_rpc_auth_refreshes_total ${rpc_auth:-0}
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EOF
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# Stale file handles
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cat <<EOF
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# HELP nfs_mount_stale_handles_total Stale file handle count per mount
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# TYPE nfs_mount_stale_handles_total counter
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EOF
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while IFS=' ' read -r device mountpoint fstype; do
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[ -z "$mountpoint" ] && continue
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local stale
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stale=$(get_stale_handles "$mountpoint")
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echo "nfs_mount_stale_handles_total{mount=\"$mountpoint\"} $stale"
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done <<< "$mounts"
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echo ""
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# Read/Write bytes
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cat <<EOF
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# HELP nfs_mount_read_bytes_total Total bytes read per mount
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# TYPE nfs_mount_read_bytes_total counter
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EOF
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while IFS=' ' read -r device mountpoint fstype; do
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[ -z "$mountpoint" ] && continue
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local rbytes
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rbytes=$(get_read_bytes "$mountpoint")
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echo "nfs_mount_read_bytes_total{mount=\"$mountpoint\"} $rbytes"
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done <<< "$mounts"
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echo ""
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cat <<EOF
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# HELP nfs_mount_write_bytes_total Total bytes written per mount
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# TYPE nfs_mount_write_bytes_total counter
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EOF
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while IFS=' ' read -r device mountpoint fstype; do
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[ -z "$mountpoint" ] && continue
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local wbytes
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wbytes=$(get_write_bytes "$mountpoint")
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echo "nfs_mount_write_bytes_total{mount=\"$mountpoint\"} $wbytes"
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done <<< "$mounts"
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echo ""
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# Read/Write operation counts
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cat <<EOF
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# HELP nfs_mount_read_ops_total Total read operations per mount
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# TYPE nfs_mount_read_ops_total counter
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EOF
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while IFS=' ' read -r device mountpoint fstype; do
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[ -z "$mountpoint" ] && continue
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local rops
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rops=$(get_op_count "$mountpoint" "READ")
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echo "nfs_mount_read_ops_total{mount=\"$mountpoint\"} $rops"
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done <<< "$mounts"
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echo ""
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cat <<EOF
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# HELP nfs_mount_write_ops_total Total write operations per mount
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# TYPE nfs_mount_write_ops_total counter
|
|
EOF
|
|
|
|
while IFS=' ' read -r device mountpoint fstype; do
|
|
[ -z "$mountpoint" ] && continue
|
|
local wops
|
|
wops=$(get_op_count "$mountpoint" "WRITE")
|
|
echo "nfs_mount_write_ops_total{mount=\"$mountpoint\"} $wops"
|
|
done <<< "$mounts"
|
|
|
|
echo ""
|
|
|
|
# Read/Write latency
|
|
cat <<EOF
|
|
# HELP nfs_mount_read_latency_seconds Cumulative read execution time per mount
|
|
# TYPE nfs_mount_read_latency_seconds counter
|
|
EOF
|
|
|
|
while IFS=' ' read -r device mountpoint fstype; do
|
|
[ -z "$mountpoint" ] && continue
|
|
local rlat
|
|
rlat=$(get_op_latency "$mountpoint" "READ")
|
|
echo "nfs_mount_read_latency_seconds{mount=\"$mountpoint\"} $rlat"
|
|
done <<< "$mounts"
|
|
|
|
echo ""
|
|
|
|
cat <<EOF
|
|
# HELP nfs_mount_write_latency_seconds Cumulative write execution time per mount
|
|
# TYPE nfs_mount_write_latency_seconds counter
|
|
EOF
|
|
|
|
while IFS=' ' read -r device mountpoint fstype; do
|
|
[ -z "$mountpoint" ] && continue
|
|
local wlat
|
|
wlat=$(get_op_latency "$mountpoint" "WRITE")
|
|
echo "nfs_mount_write_latency_seconds{mount=\"$mountpoint\"} $wlat"
|
|
done <<< "$mounts"
|
|
|
|
echo ""
|
|
|
|
# Additional NFS operations
|
|
cat <<EOF
|
|
# HELP nfs_mount_getattr_ops_total Total GETATTR operations per mount
|
|
# TYPE nfs_mount_getattr_ops_total counter
|
|
EOF
|
|
|
|
while IFS=' ' read -r device mountpoint fstype; do
|
|
[ -z "$mountpoint" ] && continue
|
|
local ops
|
|
ops=$(get_op_count "$mountpoint" "GETATTR")
|
|
echo "nfs_mount_getattr_ops_total{mount=\"$mountpoint\"} $ops"
|
|
done <<< "$mounts"
|
|
|
|
echo ""
|
|
|
|
cat <<EOF
|
|
# HELP nfs_mount_access_ops_total Total ACCESS operations per mount
|
|
# TYPE nfs_mount_access_ops_total counter
|
|
EOF
|
|
|
|
while IFS=' ' read -r device mountpoint fstype; do
|
|
[ -z "$mountpoint" ] && continue
|
|
local ops
|
|
ops=$(get_op_count "$mountpoint" "ACCESS")
|
|
echo "nfs_mount_access_ops_total{mount=\"$mountpoint\"} $ops"
|
|
done <<< "$mounts"
|
|
|
|
echo ""
|
|
|
|
cat <<EOF
|
|
# HELP nfs_mount_lookup_ops_total Total LOOKUP operations per mount
|
|
# TYPE nfs_mount_lookup_ops_total counter
|
|
EOF
|
|
|
|
while IFS=' ' read -r device mountpoint fstype; do
|
|
[ -z "$mountpoint" ] && continue
|
|
local ops
|
|
ops=$(get_op_count "$mountpoint" "LOOKUP")
|
|
echo "nfs_mount_lookup_ops_total{mount=\"$mountpoint\"} $ops"
|
|
done <<< "$mounts"
|
|
|
|
echo ""
|
|
|
|
cat <<EOF
|
|
# HELP nfs_mount_readdir_ops_total Total READDIR operations per mount
|
|
# TYPE nfs_mount_readdir_ops_total counter
|
|
EOF
|
|
|
|
while IFS=' ' read -r device mountpoint fstype; do
|
|
[ -z "$mountpoint" ] && continue
|
|
local ops
|
|
ops=$(get_op_count "$mountpoint" "READDIR")
|
|
echo "nfs_mount_readdir_ops_total{mount=\"$mountpoint\"} $ops"
|
|
done <<< "$mounts"
|
|
|
|
echo ""
|
|
|
|
# Timeouts per mount
|
|
cat <<EOF
|
|
# HELP nfs_mount_timeouts_total Total operation timeouts per mount
|
|
# TYPE nfs_mount_timeouts_total counter
|
|
EOF
|
|
|
|
while IFS=' ' read -r device mountpoint fstype; do
|
|
[ -z "$mountpoint" ] && continue
|
|
local tout
|
|
tout=$(get_total_timeouts "$mountpoint")
|
|
echo "nfs_mount_timeouts_total{mount=\"$mountpoint\"} $tout"
|
|
done <<< "$mounts"
|
|
|
|
echo ""
|
|
|
|
# Total mount count
|
|
cat <<EOF
|
|
# HELP nfs_mounts_total Total number of NFS mounts
|
|
# TYPE nfs_mounts_total gauge
|
|
nfs_mounts_total $mount_count
|
|
|
|
EOF
|
|
|
|
# Exporter runtime
|
|
local script_end script_duration
|
|
script_end=$(date +%s)
|
|
script_duration=$((script_end - script_start))
|
|
|
|
cat <<EOF
|
|
# HELP nfs_exporter_duration_seconds Time to generate all metrics
|
|
# TYPE nfs_exporter_duration_seconds gauge
|
|
nfs_exporter_duration_seconds $script_duration
|
|
|
|
# HELP nfs_exporter_last_run_timestamp Unix timestamp of last successful run
|
|
# TYPE nfs_exporter_last_run_timestamp gauge
|
|
nfs_exporter_last_run_timestamp $script_end
|
|
EOF
|
|
|
|
echo ""
|
|
}
|
|
|
|
# ============================================================================
|
|
# HTTP SERVER MODE
|
|
# ============================================================================
|
|
|
|
run_http_server() {
|
|
log "Starting NFS exporter on port $HTTP_PORT..."
|
|
|
|
if ! command -v nc >/dev/null 2>&1; then
|
|
error "netcat (nc) required for HTTP mode"
|
|
exit 1
|
|
fi
|
|
|
|
while true; do
|
|
{
|
|
read -r request
|
|
if [[ "$request" =~ ^GET\ /metrics ]]; then
|
|
echo -e "HTTP/1.1 200 OK\r\nContent-Type: text/plain; version=0.0.4\r\n\r"
|
|
generate_metrics
|
|
else
|
|
echo -e "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r"
|
|
echo "<html><head><title>NFS Exporter</title></head><body><h1>NFS Prometheus Exporter</h1><p><a href=\"/metrics\">Metrics</a></p></body></html>"
|
|
fi
|
|
} | nc -l -p "$HTTP_PORT" -q 1 2>/dev/null
|
|
done
|
|
}
|
|
|
|
# ============================================================================
|
|
# MAIN EXECUTION
|
|
# ============================================================================
|
|
|
|
main() {
|
|
parse_args "$@"
|
|
|
|
if ! acquire_lock; then
|
|
exit 1
|
|
fi
|
|
|
|
if [ "$HTTP_MODE" = true ]; then
|
|
run_http_server
|
|
elif [ -n "$OUTPUT_FILE" ]; then
|
|
local output_dir
|
|
output_dir="$(dirname "$OUTPUT_FILE")"
|
|
mkdir -p "$output_dir"
|
|
|
|
local temp_file
|
|
temp_file=$(mktemp "${output_dir}/.nfs_metrics.XXXXXX")
|
|
|
|
if ! generate_metrics > "$temp_file" 2>/dev/null; then
|
|
rm -f "$temp_file"
|
|
error "Failed to generate metrics"
|
|
exit 1
|
|
fi
|
|
|
|
local file_lines
|
|
file_lines=$(wc -l < "$temp_file" 2>/dev/null || echo 0)
|
|
|
|
if [ "$file_lines" -lt 5 ]; then
|
|
rm -f "$temp_file"
|
|
error "Metrics file too small ($file_lines lines), keeping previous"
|
|
exit 1
|
|
fi
|
|
|
|
chmod 644 "$temp_file"
|
|
mv -f "$temp_file" "$OUTPUT_FILE"
|
|
|
|
log "Metrics written to $OUTPUT_FILE ($file_lines lines)"
|
|
else
|
|
generate_metrics
|
|
fi
|
|
}
|
|
|
|
main "$@"
|