Metrics

The following metrics are exported for given host (target)

❯ curl 'localhost:8999/probe?target=ahorn'
# HELP restic_snapshots_latest_time Time of the latest snapshot
# TYPE restic_snapshots_latest_time gauge
restic_snapshots_latest_time{hostname="ahorn"} 1.655762407e+09
# HELP restic_stats_latest_total_nfiles Number of files
# TYPE restic_stats_latest_total_nfiles gauge
restic_stats_latest_total_nfiles{hostname="ahorn"} 480
# HELP restic_stats_latest_total_size Total Size
# TYPE restic_stats_latest_total_size gauge
restic_stats_latest_total_size{hostname="ahorn"} 686011

Configuration

Configuration is done via environment variables.

# Exporter configuration
RESTIC_EXPORTER_BIN="restic"
RESTIC_EXPORTER_PORT=8999
RESTIC_EXPORTER_ADDRESS=127.0.0.1

# Restic configuration
RESTIC_REPOSITORY=s3:https://s3.myhost.com/restic
RESTIC_PASSWORD_FILE=/var/src/secrets/restic/repo-pw

# Optional: S3 credentials
AWS_ACCESS_KEY_ID=restic-ahorn
AWS_SECRET_ACCESS_KEY=aaaaaabbbbbcccccddddd

Nix flake

A nix flake is provided exposing the application as package. It also provides a nixos module.

services.restic-exporter = {
  enable = true;

  # Optional configuration
  port = "8999";
  address = "127.0.0.1";
  targets = [ "host1" "host2" "host3" ];
  user = "restic-exporter";
  group = "restic-exporter";
  environmentFile = "/path/to/envfile";
};

Prometheus

- job_name: restic
  metrics_path: /probe
  relabel_configs:
    - source_labels:
        - "__address__"
      target_label: "__param_target"
    - source_labels:
        - "__param_target"
      target_label: target
    - replacement: "127.0.0.1:8999"
      target_label: "__address__"
  scrape_interval: "10m"
  scrape_timeout: "9m"
  static_configs:
    - targets:
        - host1