Terraform provider for libvirt

This provider is still experimental/in development. To see what is left or planned, see the issues list.

This is a terraform provider that lets you provision servers on a libvirt host via Terraform.

Requirements

• libvirt 1.2.14 or newer on the hypervisor

The provider uses virDomainInterfaceAddresses which was added in 1.2.14. If you need a stable server distribution with a recent libvirt version, try openSUSE Leap or Ubuntu (from version 15.10 Wily Werewolf on).

In the future, I may try to support older libvirt versions if I find a way to elegantely conditional compile the code and get the IP addresses with alternative methods.

Installing

Copied from the Terraform documentation:

To install a plugin, put the binary somewhere on your filesystem, then configure Terraform to be able to find it. The configuration where plugins are defined is ~/.terraformrc for Unix-like systems and %APPDATA%/terraform.rc for Windows.

If you are using opensuse/SUSE distro, add the repo and download the package (check the repo according your distro)

DISTRO=openSUSE_Leap_42.1
zypper addrepo http://download.opensuse.org/repositories/Virtualization:containers/$DISTRO/Virtualization:containers.repo
zypper refresh
zypper install terraform-provider-libvirt

The binary should be renamed to terraform-provider-libvirt

You should update your .terraformrc and refer to the binary:

providers {
  libvirt = "/path/to/terraform-provider-libvirt"
}

Using the provider

Here is an example that will setup the following:

• A virtual server resource

(create this as libvirt.tf and run terraform commands from this directory):

provider "libvirt" {
    uri = "qemu:///system"
}

You can also set the URI in the LIBVIRT_DEFAULT_URI environment variable.

Now, define a libvirt domain:

resource "libvirt_domain" "terraform_test" {
  name = "terraform_test"
}

Now you can see the plan, apply it, and then destroy the infrastructure:

$ terraform plan
$ terraform apply
$ terraform destroy

Building from source

1. Install Go on your machine
2. Set up Gopath
3. git clone this repository into $GOPATH/src/github.com/dmacvicar/terraform-provider-libvirt
4. Get the dependencies, either with go get
   1. Run go get
   2. Switch the terraform project back to the stable version, otherwise you will get a Incompatible API version with plugin. Plugin version: 1, Ours: 2 error at runtime:

   cd $GOPATH/src/github.com/hashicorp/terraform
   git checkout v0.6.16
   cd $GOPATH/src/github.com/dmacvicar/terraform-provider-libvirt
   

5. .. or alternatively install govend and:
   1. Run govend, which will scan dependencies and download them into vendor
   2. problematic dependencies, like terraform, will be automatically in the right version thanks to the vendor.yml file.
6. Run go install to build the binary. You will now find the binary at $GOPATH/bin/terraform-provider-libvirt.

Running

1. create the example file libvirt.tf in your working directory
2. terraform plan
3. terraform apply

Running acceptance tests

You need to define the LIBVIRT_DEFAULT_URI and TF_ACC variables:

export LIBVIRT_DEFAULT_URI=qemu:///system
export TF_ACC=1
go test ./...

Known Problems

• There is a bug in libvirt that seems to be causing problems to unlink volumes. Tracked here.

  If you see something like:

  cannot unlink file '/var/lib/libvirt/images/XXXXXXXXXXXX': Permission denied

  It is probably related and fixed in libvirt 1.3.3 (already available in openSUSE Tumbleweed).

• On Ubuntu distros SELinux is enforced by qemu even if it is disabled globally, this might cause unexpected Could not open '/var/lib/libvirt/images/<FILE_NAME>': Permission denied errors. Double check that security_driver = "none" is uncommented in /etc/libvirt/qemu.conf and issue sudo systemctl restart libvirt-bin to restart the daemon.

Author

• Duncan Mac-Vicar P. [email protected]

The structure and boilerplate is inspired from the Softlayer and Google Terraform provider sources.

License

• Apache 2.0, See LICENSE file