feat: add data sources to extract node and device information

libvirt/data_source_libvirt_node_device_info_test.go

@@ -0,0 +1,40 @@
+package libvirt
+
+import (
+	"regexp"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+)
+
+func TestAccLibvirtNodeDeviceInfoDataSource(t *testing.T) {
+	resource.Test(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataSourceNodeDeviceInfoPCI,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestMatchResourceAttr(
+						"data.libvirt_node_device_info.device", "name", regexp.MustCompile(`^pci_0000_00_00_0$`)),
+				),
+			}, {
+				Config: testAccDataSourceNodeDeviceInfoSystem,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestMatchResourceAttr(
+						"data.libvirt_node_device_info.device", "name", regexp.MustCompile(`^computer$`)),
+				),
+			},
+		},
+	})
+}
+
+const testAccDataSourceNodeDeviceInfoPCI = `
+data "libvirt_node_device_info" "device" {
+	name = "pci_0000_00_00_0"
+}`
+
+const testAccDataSourceNodeDeviceInfoSystem = `
+data "libvirt_node_device_info" "device" {
+	name = "computer"
+}`

libvirt/data_source_libvirt_node_devices.go

@@ -0,0 +1,73 @@
+package libvirt
+
+import (
+	"fmt"
+	"log"
+	"sort"
+	"strconv"
+
+	libvirt "github.com/digitalocean/go-libvirt"
+	"github.com/dmacvicar/terraform-provider-libvirt/libvirt/helper/hashcode"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+// a libvirt nodeinfo datasource
+//
+// Datasource example:
+//
+//	data "libvirt_node_devices" "list" {
+//	}
+//
+//	output "cpus" {
+//	  value = data.libvirt_node_devices.list.devices
+//	}
+func datasourceLibvirtNodeDevices() *schema.Resource {
+	return &schema.Resource{
+		Read: resourceLibvirtNodeDevicesRead,
+		Schema: map[string]*schema.Schema{
+			"capability": {
+				Type:     schema.TypeString,
+				Optional: true,
+			},
+			"devices": {
+				Type:     schema.TypeSet,
+				Computed: true,
+				Elem: &schema.Schema{
+					Type: schema.TypeString,
+				},
+			},
+		},
+	}
+}
+
+func resourceLibvirtNodeDevicesRead(d *schema.ResourceData, meta interface{}) error {
+	log.Printf("[DEBUG] Read data source libvirt_nodedevices")
+
+	virConn := meta.(*Client).libvirt
+	if virConn == nil {
+		return fmt.Errorf(LibVirtConIsNil)
+	}
+
+	var cap libvirt.OptString
+
+	if capability, ok := d.GetOk("capability"); ok {
+		cap = append(cap, capability.(string))
+		log.Printf("[DEBUG] Got capability: %v", cap)
+	}
+
+	rnum, err := virConn.NodeNumOfDevices(libvirt.OptString(cap), 0)
+	if err != nil {
+		return fmt.Errorf("failed to retrieve number of devices: %w", err)
+	}
+
+	devices, err := virConn.NodeListDevices(cap, rnum, 0)
+	if err != nil {
+		return fmt.Errorf("failed to retrieve list of node devices: %w", err)
+	}
+
+	sort.Strings(devices)
+	d.Set("devices", devices)
+	d.SetId(strconv.Itoa(hashcode.String(fmt.Sprintf("%v", devices))))
+
+	return nil
+}

libvirt/data_source_libvirt_node_devices_test.go

@@ -0,0 +1,41 @@
+package libvirt
+
+import (
+	"regexp"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+)
+
+func TestAccLibvirtNodeDevicesDataSource(t *testing.T) {
+	resource.Test(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataSourceNodeDevicesPci,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestMatchResourceAttr(
+						"data.libvirt_node_devices.node", "devices[0]", regexp.MustCompile(`^pci_\d{4}_\d{2}_\d{2}_\d{1}`)),
+				),
+			},
+			{
+				Config: testAccDataSourceNodeDevicesSystem,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestMatchResourceAttr(
+						"data.libvirt_node_devices.node", "devices[0]", regexp.MustCompile(`^computer$`)),
+				),
+			},
+		},
+	})
+}
+
+const testAccDataSourceNodeDevicesPci = `
+data "libvirt_node_devices" "node" {
+	capability = "pci"
+}`
+
+const testAccDataSourceNodeDevicesSystem = `
+data "libvirt_node_devices" "node" {
+	capability = "system"
+}`

libvirt/data_source_libvirt_node_info.go

@@ -0,0 +1,94 @@
+package libvirt
+
+import (
+	"fmt"
+	"log"
+	"strconv"
+
+	"github.com/dmacvicar/terraform-provider-libvirt/libvirt/helper/hashcode"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+// a libvirt nodeinfo datasource
+//
+// Datasource example:
+//
+//	data "libvirt_nodeinfo" "info" {
+//	}
+//
+//	output "cpus" {
+//	  value = data.libvirt_nodeinfo.info.cpus
+//	}
+func datasourceLibvirtNodeInfo() *schema.Resource {
+	return &schema.Resource{
+		Read: resourceLibvirtNodeInfoRead,
+		Schema: map[string]*schema.Schema{
+			"cpu_model": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+			"memory_total_kb": {
+				Type:     schema.TypeInt,
+				Computed: true,
+			},
+			"cpu_cores_total": {
+				Type:     schema.TypeInt,
+				Computed: true,
+			},
+			"numa_nodes": {
+				Type:     schema.TypeInt,
+				Computed: true,
+			},
+			"cpu_sockets": {
+				Type:     schema.TypeInt,
+				Computed: true,
+			},
+			"cpu_cores_per_socket": {
+				Type:     schema.TypeInt,
+				Computed: true,
+			},
+			"cpu_threads_per_core": {
+				Type:     schema.TypeInt,
+				Computed: true,
+			},
+		},
+	}
+}
+
+func resourceLibvirtNodeInfoRead(d *schema.ResourceData, meta interface{}) error {
+	log.Printf("[DEBUG] Read data source libvirt_nodeinfo")
+
+	virConn := meta.(*Client).libvirt
+	if virConn == nil {
+		return fmt.Errorf(LibVirtConIsNil)
+	}
+
+	model, memory, cpus, _, nodes, sockets, cores, threads, err := virConn.NodeGetInfo()
+
+	if err != nil {
+		return fmt.Errorf("failed to retrieve domains: %w", err)
+	}
+
+	d.Set("cpu_model", int8ToString(model))
+	d.Set("cpu_cores_total", cpus)
+	d.Set("cpu_cores_per_socket", cores)
+	d.Set("numa_nodes", nodes)
+	d.Set("cpu_sockets", sockets)
+	d.Set("cpu_threads_per_core", threads)
+	d.Set("numa_nodes", nodes)
+	d.Set("memory_total_kb", memory)
+	d.SetId(strconv.Itoa(hashcode.String(fmt.Sprintf("%v%v%v%v%v%v%v", model, memory, cpus, nodes, sockets, cores, threads))))
+
+	return nil
+}
+
+func int8ToString(bs [32]int8) string {
+	ba := []uint8{}
+	for _, b := range bs {
+		if b == 0 {
+			break
+		}
+		ba = append(ba, uint8(b))
+	}
+	return string(ba)
+}

libvirt/data_source_libvirt_node_info_test.go

@@ -0,0 +1,35 @@
+package libvirt
+
+import (
+	"regexp"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+)
+
+func TestAccLibvirtNodeInfoDataSource(t *testing.T) {
+	resource.Test(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataSourceNodeInfo,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestMatchResourceAttr(
+						"data.libvirt_node_info.info", "cpus", regexp.MustCompile(`^\d+`)),
+				),
+			}, {
+				Config: testAccDataSourceNodeInfo,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestMatchResourceAttr(
+						"data.libvirt_node_info.info", "numa_nodes", regexp.MustCompile(`^\d+`)),
+				),
+			},
+		},
+	})
+}
+
+const testAccDataSourceNodeInfo = `
+data "libvirt_node_info" "info" {
+
+}`

libvirt/provider.go

@@ -31,6 +31,9 @@ func Provider() *schema.Provider {
 			"libvirt_network_dns_host_template":        datasourceLibvirtNetworkDNSHostTemplate(),
 			"libvirt_network_dns_srv_template":         datasourceLibvirtNetworkDNSSRVTemplate(),
 			"libvirt_network_dnsmasq_options_template": datasourceLibvirtNetworkDnsmasqOptionsTemplate(),
+			"libvirt_node_info":                        datasourceLibvirtNodeInfo(),
+			"libvirt_node_device_info":                 datasourceLibvirtNodeDeviceInfo(),
+			"libvirt_node_devices":                     datasourceLibvirtNodeDevices(),
 		},
 
 		ConfigureFunc: providerConfigure,

website/docs/d/node_device_info.html.markdown

@@ -0,0 +1,89 @@
+---
+layout: "libvirt"
+page_title: "Libvirt: libvirt_node_device_info"
+sidebar_current: "docs-libvirt-node-device-info"
+description: |-
+  Use this data source to get information about a specific device on the current node
+---
+
+# Data Source: libvirt\_node\_device\_info
+
+Retrieve information about a specific device on the current node
+
+## Example Usage
+
+```hcl
+data "libvirt_node_device_info" "device" {
+  name = "pci_0000_00_00_0"
+}
+```
+
+## Argument Reference
+
+* `name` - (Required) The name of the device name as expected by [libvirt](https://www.libvirt.org/manpages/virsh.html#nodedev-commands).
+
+## Attribute Reference
+
+This data source exports the following attributes in addition to the arguments above:
+
+* `capability` - A map of the various attributes for the device, depending on the type of device.
+  Currently implemented are `pci`, `storage`, `usb`
+  * `type` - Device type: `pci`, `storage`, `usb`
+  * `devnode`: For devices with a `/dev` special file. A mandatory attribute type specify the kind of file `path`, which may be either dev for the main name, or `link` for additional symlinks.
+
+  For `pci` devices the additional attributes are:
+  * `class` - Device PCI class
+  * `domain` - Device PCI domain
+  * `bus` - Device PCI bus
+  * `slot` - Device PCI slot
+  * `function` - Device PCI function
+  * `product` - Device PCI product map of `id` and `name`
+  * `vendor` - Device PCI vendor map of `id` and `name`
+  * `iommu_group` - Structure that holds IOMMU Group `number` and the list of devices that are part of the group
+
+  For `storage` devices the additional attributes are:
+  * `block` - Block device name
+  * `drive_type` - Device drive type
+  * `model` - Device model
+  * `serial` - Device serial number
+  * `size` - Device size in bytes
+  * `logical_block_size` - Device logical block size
+  * `num_blocks` - Number of blocks on the device
+
+  For `usb` devices the additional attributes are:
+  * `number` - Device number
+  * `class` - Device class
+  * `subclass` - Device subclass
+  * `protocol` - Device protocol
+
+  For `usb_device` devices the additional attributes are:
+  * `bus` - Which bus the device belongs to
+  * `device` - Which device within the \
+  * `product` - If present, the product `id` and `name` from the device ROM
+  * `vendor` - If present, the vendor `id` and `name` from the device ROM
+
+  For `net` devices the additional attributes are:
+  * `interface` - The interface name tied to this device
+  * `address` - If present, the MAC address of the device
+  * `link` - Optional to reflect the status of the link via `speed` and `state` keys
+  * `feature` - List of features supported by the network interface
+  * `capability` - Holds key `type` that describes the type of network interface: `80203` for IEEE 802.3 or `80211` for IEEE 802.11
+
+  For `scsi_host` devices the additional attributes are:
+  * `host` - The SCSI host number
+  * `unique_id` - This optionally provides the value from the 'unique_id' file found in the scsi_host's directory
+
+  For `scsi` devices the additional attributes are:
+  * `host` - The SCSI host containing the device
+  * `bus` - The bus within the host
+  * `target` - The target within the bus
+  * `lun` - The lun within the target
+  * `scsi_type` - The type of SCSI device
+
+  For `drm` devices the additional attributes are:
+  * `drm_type` - Type of DRM device: `render` or `card`
+
+* `parent` - The parent of this device in the hierarchy
+* `path` - Full path of the device
+* `xml` - The XML returned by the libvirt API call
+* `devnode` - For type `drm` holds the `path` and `link` that point to the device