Erich Blume
e264b39cd6
- Query torrent-get RPC to sum totalSize of all torrents - Add transmission_torrents_size_bytes gauge metric - Add "Total Torrent Size" timeseries panel to dashboard Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
120 lines
4.5 KiB
Django/Jinja
120 lines
4.5 KiB
Django/Jinja
#!/bin/bash
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# {{ ansible_managed }}
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# Collects transmission-daemon metrics for node_exporter textfile collector
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set -euo pipefail
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RPC_URL="http://{{ transmission_rpc_host }}:{{ transmission_rpc_port }}/transmission/rpc"
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OUTPUT_FILE="{{ transmission_metrics_dir }}/transmission.prom"
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TEMP_FILE="${OUTPUT_FILE}.tmp"
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# Get session ID (required for transmission RPC)
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# Note: transmission doesn't support HEAD requests, so we make a request and parse
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# the 409 response headers. We use sed to stop at the blank line (which has \r) before body.
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get_session_id() {
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curl -s -i "$RPC_URL" 2>/dev/null | sed '/^\r$/q' | grep -i '^X-Transmission-Session-Id:' | awk '{print $2}' | tr -d '\r'
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}
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# Make RPC request
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rpc_request() {
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local method="$1"
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local args="${2:-}"
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local session_id
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session_id=$(get_session_id)
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if [ -z "$session_id" ]; then
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echo "Failed to get session ID" >&2
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return 1
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fi
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local payload
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if [ -n "$args" ]; then
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payload="{\"method\": \"$method\", \"arguments\": $args}"
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else
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payload="{\"method\": \"$method\"}"
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fi
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curl -s "$RPC_URL" \
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-H "X-Transmission-Session-Id: $session_id" \
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-H "Content-Type: application/json" \
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-d "$payload"
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}
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# Get session stats
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session_stats=$(rpc_request "session-stats")
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if [ -z "$session_stats" ] || ! echo "$session_stats" | grep -q '"result":"success"'; then
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echo "Failed to get session stats" >&2
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exit 1
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fi
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# Extract values using grep/sed (avoiding jq dependency)
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extract_json_int() {
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echo "$1" | grep -o "\"$2\":[0-9]*" | head -1 | sed "s/\"$2\"://"
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}
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# Session stats
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download_speed=$(extract_json_int "$session_stats" "downloadSpeed")
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upload_speed=$(extract_json_int "$session_stats" "uploadSpeed")
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torrents_active=$(extract_json_int "$session_stats" "activeTorrentCount")
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torrents_paused=$(extract_json_int "$session_stats" "pausedTorrentCount")
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torrents_total=$(extract_json_int "$session_stats" "torrentCount")
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# Cumulative stats
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downloaded_bytes=$(echo "$session_stats" | grep -o '"cumulative-stats":{[^}]*}' | grep -o '"downloadedBytes":[0-9]*' | sed 's/"downloadedBytes"://')
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uploaded_bytes=$(echo "$session_stats" | grep -o '"cumulative-stats":{[^}]*}' | grep -o '"uploadedBytes":[0-9]*' | sed 's/"uploadedBytes"://')
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seconds_active=$(echo "$session_stats" | grep -o '"cumulative-stats":{[^}]*}' | grep -o '"secondsActive":[0-9]*' | sed 's/"secondsActive"://')
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# Get total size of all torrents
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torrent_info=$(rpc_request "torrent-get" '{"fields": ["totalSize"]}')
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total_size_bytes=0
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if echo "$torrent_info" | grep -q '"result":"success"'; then
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# Sum all totalSize values
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total_size_bytes=$(echo "$torrent_info" | grep -o '"totalSize":[0-9]*' | sed 's/"totalSize"://' | awk '{sum += $1} END {print sum}')
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fi
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# Write metrics
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cat > "$TEMP_FILE" << EOF
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# HELP transmission_download_speed_bytes Current download speed in bytes per second
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# TYPE transmission_download_speed_bytes gauge
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transmission_download_speed_bytes ${download_speed:-0}
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# HELP transmission_upload_speed_bytes Current upload speed in bytes per second
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# TYPE transmission_upload_speed_bytes gauge
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transmission_upload_speed_bytes ${upload_speed:-0}
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# HELP transmission_torrents_active Number of active torrents
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# TYPE transmission_torrents_active gauge
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transmission_torrents_active ${torrents_active:-0}
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# HELP transmission_torrents_paused Number of paused torrents
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# TYPE transmission_torrents_paused gauge
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transmission_torrents_paused ${torrents_paused:-0}
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# HELP transmission_torrents_total Total number of torrents
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# TYPE transmission_torrents_total gauge
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transmission_torrents_total ${torrents_total:-0}
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# HELP transmission_torrents_size_bytes Total size of all torrents in bytes
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# TYPE transmission_torrents_size_bytes gauge
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transmission_torrents_size_bytes ${total_size_bytes:-0}
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# HELP transmission_downloaded_bytes_total Total bytes downloaded (cumulative)
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# TYPE transmission_downloaded_bytes_total counter
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transmission_downloaded_bytes_total ${downloaded_bytes:-0}
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# HELP transmission_uploaded_bytes_total Total bytes uploaded (cumulative)
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# TYPE transmission_uploaded_bytes_total counter
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transmission_uploaded_bytes_total ${uploaded_bytes:-0}
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# HELP transmission_seconds_active_total Total seconds transmission has been active
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# TYPE transmission_seconds_active_total counter
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transmission_seconds_active_total ${seconds_active:-0}
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# HELP transmission_up Transmission daemon is up and responding
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# TYPE transmission_up gauge
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transmission_up 1
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EOF
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# Atomic move
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mv "$TEMP_FILE" "$OUTPUT_FILE"
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