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Xenlight Exporter

Prometheus exporter for xen using libxl go bindings.

Installation

You can build the latest version using Go v1.11+ via go get:

go get -u github.com/Gandi/xenlight_exporter

You need xen headers as well as yajl headers to be able to compile xenlight go bindings

Dockerfile

You can build the binary on an arbitrary machine using the dockerfile.

docker build -t xenlight-exporter .

To build it for a xen version other than 4.14 you have to replace the dnf package in the dockerfile and update the go.mod file.

go get xenbits.xenproject.org/git-http/xen.git/tools/golang/xenlight@RELEASE-4.14.0

Usage

usage: xenlight_exporter [<flags>]

Flags:
  -h, --help                Show context-sensitive help (also try --help-long and --help-man).
      --collector.domain.show-vcpus-details
                            Enable the collection of per-vcpu time
      --collector.domain    Enable the domain collector (default: enabled).
      --collector.physical  Enable the physical collector (default: enabled).
      --collector.version   Enable the version collector (default: enabled).
      --web.listen-address=":9603"
                            Address on which to expose metrics and web interface.
      --web.telemetry-path="/metrics"
                            Path under which to expose metrics.
      --log.level="info"    Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal]
      --log.format="logger:stderr"
                            Set the log target and format. Example: "logger:syslog?appname=bob&local=7" or "logger:stdout?json=true"
      --version             Show application version.

Notes about golang bindings of libxl

The Go bindings are expected to be imported (according to Xen makefiles) using the following import path: golang.xenproject.org/xenlight. However the domain golang.xenproject.org doesn't exists (thus not allowing the use of Go modules) so I chose to import the bindings from their official repository.

Would the situation evolve and the Xen project provide an universally usable import path, I will reconsider this choice and switch to its official import path.

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Prometheus exporter for Xen using xenlight library

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