Overview

Description

rsync metrics exporter for Prometheus.io

Setup

You will need to run rsync with the --stats option since this exporter is parsing these two lines:

2023/12/22 01:18:25 [2224747] sent 39,889,034,403 bytes  received 5,146,208 bytes  70,546,738.48 bytes/sec
2023/12/22 01:18:25 [2224747] total size is 199,212,300,476  speedup is 4.99

You will also need to log to a file since the exporter is reading the file. So the command at a minimum would look like this:

rsync --stats /source /destination > /logs/rsync.log

rsync_exporter:
    image: lmerza/rsync-exporter:latest
    container_name: rsync_exporter
    restart: unless-stopped
    ports:
      - 9150:9150
    volumes:
      - ./volumes/rsync_exporter/rsync.log:/logs/rsync.log:ro

Since you are logging to a file, you can use logrotate to manage the file size.

/logs/rsync.log {
    rotate 5
    daily
    compress
    missingok
    notifempty
    copytruncate
}

Metrics

Metric	Description
rsync_last_sent_bytes	Bytes sent during the most recent rsync run
rsync_last_received_bytes	Bytes received during the most recent rsync run
rsync_last_total_size_bytes	Total size of files transferred in bytes
rsync_last_sync	UNIX timestamp (seconds) of the last successful stats parse
rsync_last_sync_valid	Indicator (1/0) showing whether rsync_last_sync is valid

Alerts

groups:
  - name: Server Alerts
    rules:
      # Alert if rsync sync hasnt happened within 24 hours
      - alert: Server Rsync Stale
        expr: |
          (time() - rsync_last_sync > 86400) and (rsync_last_sync_valid == 1)
        labels:
          severity: critical
        annotations:
          summary: "Rsync sync is stale"
          description: "The last rsync sync is more than 24 hours old."