Monitoring

Janus uses OpenCensus to collect and export metrics. OpenCensus supports several exporters, which are:

• Datadog
• Prometheus
• Stackdriver

Currently only Prometheus exporter is available in Janus.

This can be configured via the configuration file or environment variable:

# Stats / Metric Collection

[stats]
  # Backend system used to export collected metrics
  #
  # Valid Values: "datadog", "prometheus", or "stackdriver"
  #
  # Default: None
  #
  Exporter: "prometheus"

The following feature is deprecated and it is planned for removal.

Janus monitoring is built on top of hellofresh/stats-go library. You can configure it with the following env variables:

• STATS_DSN (default log://) - DSN of stats backend
• STATS_IDS - second level ID list for URLs to generalise metric names, see details in Generalise resources by type and stripping resource ID
• STATS_AUTO_DISCOVER_THRESHOLD - threshold for second level IDs autodiscovery, see details in Generalise resources by type and stripping resource ID
• STATS_AUTO_DISCOVER_WHITE_LIST - white list for second level IDs autodiscovery, see details in Generalise resources by type and stripping resource ID
• STATS_ERRORS_SECTION (default error-log) - section for error logs monitoring, see details in Usage for error logs monitoring