98 lines
3.5 KiB
Markdown
98 lines
3.5 KiB
Markdown
libvirt [](http://godoc.org/github.com/digitalocean/go-libvirt) [](https://travis-ci.org/digitalocean/go-libvirt) [](https://goreportcard.com/report/github.com/digitalocean/go-libvirt)
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====
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Package `libvirt` provides a pure Go interface for interacting with Libvirt.
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Rather than using Libvirt's C bindings, this package makes use of
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Libvirt's RPC interface, as documented [here](https://libvirt.org/internals/rpc.html).
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Connections to the libvirt server may be local, or remote. RPC packets are encoded
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using the XDR standard as defined by [RFC 4506](https://tools.ietf.org/html/rfc4506.html).
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Libvirt's RPC interface is quite extensive, and changes from one version to the next, so
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this project uses a code generator to build the go bindings. The code generator should
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be run whenever you want to build go-libvirt for a new version of libvirt. To do this,
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you'll need to set an environment variable `LIBVIRT_SOURCE` to the directory containing
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the untarred libvirt sources, and then run `go generate ./...` from the go-libvirt directory.
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The code generator consumes [src/remote/remote_protocol.x](https://github.com/libvirt/libvirt/blob/master/src/remote/remote_protocol.x)
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and produces go bindings for all the remote procedures defined there.
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[Pull requests are welcome](https://github.com/digitalocean/go-libvirt/blob/master/CONTRIBUTING.md)!
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Feel free to join us in [`#go-qemu` on freenode](https://webchat.freenode.net/)
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if you'd like to discuss the project.
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Warning
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-------
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The libvirt project strongly recommends *against* talking to the RPC interface
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directly. They consider it to be a private implementation detail with the
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possibility of being entirely rearchitected in the future.
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While these package are reasonably well-tested and have seen some use inside of
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DigitalOcean, there may be subtle bugs which could cause the packages to act
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in unexpected ways. Use at your own risk!
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In addition, the API is not considered stable at this time. If you would like
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to include package `libvirt` in a project, we highly recommend vendoring it into
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your project.
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Example
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-------
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```go
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package main
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import (
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"fmt"
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"log"
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"net"
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"time"
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"github.com/digitalocean/go-libvirt"
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)
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func main() {
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//c, err := net.DialTimeout("tcp", "127.0.0.1:16509", 2*time.Second)
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//c, err := net.DialTimeout("tcp", "192.168.1.12:16509", 2*time.Second)
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c, err := net.DialTimeout("unix", "/var/run/libvirt/libvirt-sock", 2*time.Second)
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if err != nil {
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log.Fatalf("failed to dial libvirt: %v", err)
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}
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l := libvirt.New(c)
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if err := l.Connect(); err != nil {
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log.Fatalf("failed to connect: %v", err)
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}
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v, err := l.Version()
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if err != nil {
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log.Fatalf("failed to retrieve libvirt version: %v", err)
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}
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fmt.Println("Version:", v)
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domains, err := l.Domains()
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if err != nil {
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log.Fatalf("failed to retrieve domains: %v", err)
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}
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fmt.Println("ID\tName\t\tUUID")
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fmt.Printf("--------------------------------------------------------\n")
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for _, d := range domains {
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fmt.Printf("%d\t%s\t%x\n", d.ID, d.Name, d.UUID)
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}
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if err := l.Disconnect(); err != nil {
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log.Fatal("failed to disconnect: %v", err)
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}
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}
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```
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```
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Version: 1.3.4
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ID Name UUID
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--------------------------------------------------------
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1 Test-1 dc329f87d4de47198cfd2e21c6105b01
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2 Test-2 dc229f87d4de47198cfd2e21c6105b01
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```
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