Prometheus Browserless Exporter

This is an exporter that exposes Browserless metrics for Prometheus. Browserless exposes some Prometheus metrics already but not all of them.

The exporter provides access to the following additional metrics:

# HELP browserless_concurrent_max Maximum number of concurrent sessions observed
# TYPE browserless_concurrent_max gauge
browserless_concurrent_max 0
# HELP browserless_error Number of requests resulting in an error
# TYPE browserless_error counter
browserless_error 0
# HELP browserless_exporter_errors_total The total number of errors per collector
# TYPE browserless_exporter_errors_total counter
browserless_exporter_errors_total{collector="metrics-total"} 0
# HELP browserless_queued Number of requests that got queued
# TYPE browserless_queued counter
browserless_queued 0
# HELP browserless_rejected Number of requests that got rejected
# TYPE browserless_rejected counter
browserless_rejected 0
# HELP browserless_successful Number of successful requests
# TYPE browserless_successful counter
browserless_successful 0
# HELP browserless_time_max MaxTime as defined by browserless
# TYPE browserless_time_max gauge
browserless_time_max 0
# HELP browserless_time_mean MeanTime as defined by browserless
# TYPE browserless_time_mean gauge
browserless_time_mean 0
# HELP browserless_time_min MinTime as defined by browserless
# TYPE browserless_time_min gauge
browserless_time_min 0
# HELP browserless_time_total TotalTime as defined by browserless
# TYPE browserless_time_total gauge
browserless_time_total 0
# HELP browserless_timedout Number of timedout requests
# TYPE browserless_timedout counter
browserless_timedout 0
# HELP browserless_unhealthy Number of unhealthy requests
# TYPE browserless_unhealthy counter
browserless_unhealthy 0

Usage

The following environment variables can be configured:

• LISTEN_ADDR: Address / Port for the exporter, default: :3001
• TIMEOUT: Timeout for the request to Browserless in seconds, default: 5
• DEBUG: Debug mode and increased logging, default: false
• BROWSERLESS_ENDPOINT: The endpoint where Browserless exposes its metrics, default: http://localhost:3000/metrics/total
• METRICS_PATH: Path where the Prometheus metrics are going to be exposed at, default: /metrics

Run

With Docker Compose:

docker-compose -f docker-compose.yml up -d

Credits

Some inspiration was taken from these projects:

• JustWatch/sql_exporter
• metalmatze/digitalocean_exporter