Chapter 6, Exporters and Integrations

1. The textfile collector enables the exposition of custom metrics by watching a directory for files with the .prom extension that contain metrics in the Prometheus exposition format.
2. Data is collected from the container runtime daemon and from Linux cgroups.
3. You can restrict the number of collectors (--collectors) to enable, or use the metric whitelist (--metric-whitelist) or blacklist (--metric-blacklist) flags.
4. When debugging probes, you can append &debug=true to the HTTP GET URL to enable debug information.
5. We can use mtail or grok_exporter to extract metrics from the application logs.
6. One possible problem is the lack of high availability, making it a single point of failure. This also impacts scalability, as the only way to scale is vertically or by sharding. By using Pushgateway, Prometheus does not scrape an instance directly, which...