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libvirt
Libvirt: libvirt_volume
docs-libvirt-volume
Manages a storage volume in libvirt

libvirt_volume

Manages a storage volume in libvirt. For more information see the official documentation.

Example Usage

# Base OS image to use to create a cluster of different
# nodes
resource "libvirt_volume" "opensuse_leap" {
  name   = "opensuse_leap"
  source = "http://download.opensuse.org/repositories/Cloud:/Images:/Leap_42.1/images/openSUSE-Leap-42.1-OpenStack.x86_64.qcow2"
}

# volume to attach to the "master" domain as main disk
resource "libvirt_volume" "master" {
  name           = "master.qcow2"
  base_volume_id = libvirt_volume.opensuse_leap.id
}

# volumes to attach to the "workers" domains as main disk
resource "libvirt_volume" "worker" {
  name           = "worker_${count.index}.qcow2"
  base_volume_id = libvirt_volume.opensuse_leap.id
  count          = var.workers_count
}

~> Tip: when provisioning multiple domains using the same base image, create a libvirt_volume for the base image and then define the domain specific ones as based on it. This way the image will not be modified and no extra disk space is going to be used for the base image.

Argument Reference

The following arguments are supported:

  • name - (Required) A unique name for the resource, required by libvirt. Changing this forces a new resource to be created.
  • pool - (Optional) The storage pool where the resource will be created. If not given, the default storage pool will be used.
  • source - (Optional) If specified, the image will be uploaded into libvirt storage pool. It's possible to specify the path to a local (relative to the machine running the terraform command) image or a remote one. Remote images have to be specified using HTTP(S) urls for now.
  • size - (Optional) The size of the volume in bytes (if you don't like this, help fix this issue. If source is specified, size will be set to the source image file size. size can be omitted if source is specified. size will then be set to the source image file size. size can be omitted if base_volume_id or base_volume_name is specified. size will then be set to the base volume size. If size is specified to be bigger than base_volume_id or base_volume_name size, you can use cloudinit if your OS supports it, with libvirt_cloudinit_disk and the growpart module to resize the partition.
  • base_volume_id - (Optional) The backing volume (CoW) to use for this volume.
  • base_volume_name - (Optional) The name of the backing volume (CoW) to use for this volume. Note well: when base_volume_pool is not specified the volume is going to be searched inside of pool.
  • base_volume_pool - (Optional) The name of the storage pool containing the volume defined by base_volume_name.

Altering libvirt's generated volume XML definition

The optional xml block relates to the generated volume XML.

Currently the following attributes are supported:

  • xslt: specifies a XSLT stylesheet to transform the generated XML definition before creating the volume. This is used to support features the provider does not allow to set from the schema. It is not recommended to alter properties and settings that are exposed to the schema, as terraform will insist in changing them back to the known state.

See the domain option with the same name for more information and examples.

Attributes Reference

  • id - a unique identifier for the resource