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Prometheus libvirt exporter

This repository provides code for a Prometheus metrics exporter for libvirt. This exporter connects to any libvirt daemon and exports per-domain metrics related to CPU, memory, disk and network usage. By default, this exporter listens on TCP port 9177.

This exporter makes use of libvirt-go, the official Go bindings for libvirt. Ideally, this exporter should make use of the GetAllDomainStats() API call to extract all relevant metrics. Unfortunately, we at Kumina still need this exporter to be compatible with older versions of libvirt that don't support this API call.

The following metrics/labels are being exported:

libvirt_domain_block_stats_read_bytes_total{domain="...",uuid="...",source_file="...",target_device="..."}
libvirt_domain_block_stats_read_requests_total{domain="...",uuid="...",source_file="...",target_device="..."}
libvirt_domain_block_stats_write_bytes_total{domain="...",uuid="...",source_file="...",target_device="..."}
libvirt_domain_block_stats_write_requests_total{domain="...",uuid="...",source_file="...",target_device="..."}
libvirt_domain_info_cpu_time_seconds_total{domain="...",uuid="..."}
libvirt_domain_info_maximum_memory_bytes{domain="...",uuid="..."}
libvirt_domain_info_memory_usage_bytes{domain="...",uuid="..."}
libvirt_domain_info_virtual_cpus{domain="...",uuid="..."}
libvirt_domain_interface_stats_receive_bytes_total{domain="...",uuid="...",source_bridge="...",target_device="..."}
libvirt_domain_interface_stats_receive_drops_total{domain="...",uuid="...",source_bridge="...",target_device="..."}
libvirt_domain_interface_stats_receive_errors_total{domain="...",uuid="...",source_bridge="...",target_device="..."}
libvirt_domain_interface_stats_receive_packets_total{domain="...",uuid="...",source_bridge="...",target_device="..."}
libvirt_domain_interface_stats_transmit_bytes_total{domain="...",uuid="...",source_bridge="...",target_device="..."}
libvirt_domain_interface_stats_transmit_drops_total{domain="...",uuid="...",source_bridge="...",target_device="..."}
libvirt_domain_interface_stats_transmit_errors_total{domain="...",uuid="...",source_bridge="...",target_device="..."}
libvirt_domain_interface_stats_transmit_packets_total{domain="...",uuid="...",source_bridge="...",target_device="..."}
libvirt_up

With the --libvirt.export-nova-metadata flag, it will export the following additional OpenStack-specific labels for every domain:

  • name
  • flavor
  • project_name

At Kumina we want to perform a single build of this exporter, deploying it to a variety of Linux distribution versions. This is why this repository contains a shell script, build_static.sh, that builds a statically linked copy of this exporter in an Alpine Linux based container.

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