Categorygithub.com/ondat/metrics-exporter
modulepackage
0.1.7
Repository: https://github.com/ondat/metrics-exporter.git
Documentation: pkg.go.dev
Overview
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Dependencies
27
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# README

Metrics exporter

PVC metrics exporter designed to run alongside an Ondat instance.

It knows how to extract the relevant information about Ondat volumes and makes it available as a Prometheus scraping endpoint.

Disks not owned by Ondat are ignored.

preview-overview-architecture

References

# Packages

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# Functions

ExtractOndatVolumesNumbers parses the output from "ls -l" on the storageos block devices directory further building the list of volume with Major & Minor numbers.
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ProcDiskstats reads the diskstats file and returns an array of Diskstats (one per line/device).

# Constants

DISK_SUBSYSTEM defines the common category shared between all metrics we expose about PVCs "ondat_disk_...".
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FILE_SYSTEM_SUBSYSTEM defines the common category shared between all filesystem metrics "ondat_filesystem_...".
ONDAT_NAMESPACE defines the common namespace used by all our metrics.
PROC_DISKSTATS_MIN_NUM_FIELDS is the minimum number of fields we expect to find in the /proc/diskstats (kernels v4.18+ add more).
SCRAPE_SUBSYSTEM defines the category about the metrics gathering process itself (success, failures, duration, etc) "ondat_scrape_...".
SECOND_IN_MILLISECONDS defines the number of seconds on a milliseconds.
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# Structs

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DiskStatsCollector implements the prometheus Collector interface Its sole responsibility is gathering metrics on PVCs.
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Metric is a wrapper over prometheus types (desc and type) defining a standalone metric.
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# Interfaces

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