feat(compute): flavor extra_specs, instance resize + image_name, interface/volume attach

CHANGELOG.md

@@ -45,6 +45,12 @@ All notable changes to this project are documented here. The format is based on
   `pcd_compute_servergroup` (acceptance-tested); `pcd_compute_instance` (code-complete —
   boot verification is blocked on a lab image-library issue, see DECISIONS.md); data
   sources `pcd_compute_flavor`, `pcd_compute_keypair`, `pcd_compute_availability_zones`.
+- Compute follow-ups: `pcd_compute_flavor` gains settable `extra_specs` (added/changed/
+  removed in place; the flavor's other attributes are now correctly immutable);
+  `pcd_compute_instance` supports in-place **resize** on a flavor change and booting by
+  `image_name` (resolved via Glance, alternative to `image_id`); new resources
+  `pcd_compute_interface_attach` (attach a port/network to a server) and
+  `pcd_compute_volume_attach` (attach a Cinder volume to a server).
 - Block storage (Cinder v3): `pcd_blockstorage_volume` resource (create/extend/import;
   code-complete — acceptance is blocked on the CE lab having no storage backend, see
   DECISIONS.md) and `pcd_blockstorage_volume` / `pcd_blockstorage_snapshot` data sources.

DECISIONS.md

@@ -29,6 +29,10 @@ yet passable on this lab (reason noted). Generated registry docs are not committ
 | Compute | `pcd_compute_keypair`, `_flavor`, `_servergroup` | **VALIDATED** |
 | Compute (DS) | `pcd_compute_flavor`, `_keypair`, `_availability_zones` | **VALIDATED** |
 | Compute | `pcd_compute_instance` (boot) | **PENDING** — lab image-library gap: images don't reach the onboarded host's local library → nova returns HTTP 204 for image data. Create/schedule/wait/error-report verified; passes with a library-backed image. |
+| Compute | `pcd_compute_flavor` `extra_specs` | **PENDING** — code-complete; in-place add/change/remove; other flavor attrs now correctly force replacement. Acc test written (create + in-place update + import). Not yet run live (credentials unavailable this session). No lab blocker expected — flavors work on the lab. |
+| Compute | `pcd_compute_instance` resize + `image_name` | **PENDING** — code-complete; flavor change → Nova resize/confirm (revert on failure); `image_name` resolved via Glance. Boot-blocked (same as instance boot above). |
+| Compute | `pcd_compute_interface_attach` | **PENDING** — code-complete; needs a booted instance (boot-blocked). Acc test written. |
+| Compute | `pcd_compute_volume_attach` | **PENDING** — code-complete; needs a booted instance **and** a Cinder backend (both lab-blocked). Best-effort volume waiter degrades gracefully without Cinder. |
 | Block storage | `pcd_blockstorage_volume` | **PENDING** — no Cinder storage backend on the lab (`storageBackends={}`); volumes go `creating → error`. Create + waiter + error-detection verified. |
 | Block storage (DS) | `pcd_blockstorage_volume`, `_snapshot` | **PENDING** — untestable without volumes on this lab. |
 

internal/provider/provider.go

@@ -63,6 +63,8 @@ func (p *pcdProvider) Resources(_ context.Context) []func() resource.Resource {
 		compute.NewInstanceResource,
 		compute.NewFlavorResource,
 		compute.NewServergroupResource,
+		compute.NewInterfaceAttachResource,
+		compute.NewVolumeAttachResource,
 		blockstorage.NewVolumeResource,
 	}
 }

internal/services/compute/compute.go

@@ -6,13 +6,26 @@
 package compute
 
 import (
+	"context"
 	"fmt"
+	"strings"
 
 	"github.com/hashicorp/terraform-plugin-framework/diag"
+	"github.com/hashicorp/terraform-plugin-framework/types"
 
 	"github.com/platform9/terraform-provider-pcd/internal/clients"
 )
 
+// splitInstanceScopedID parses a composite resource/import ID of the form
+// "<instance_id>/<sub_id>" (used by the attach resources).
+func splitInstanceScopedID(id string) (instanceID, sub string, err error) {
+	parts := strings.SplitN(id, "/", 2)
+	if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
+		return "", "", fmt.Errorf("expected import ID in the form <instance_id>/<id>, got %q", id)
+	}
+	return parts[0], parts[1], nil
+}
+
 // configureClient extracts the shared *clients.Config from ProviderData.
 func configureClient(providerData any, diags *diag.Diagnostics) *clients.Config {
 	if providerData == nil {
@@ -28,3 +41,14 @@ func configureClient(providerData any, diags *diag.Diagnostics) *clients.Config
 	}
 	return config
 }
+
+// extractStringMap converts a Terraform map value to a Go map[string]string,
+// returning nil for a null/unknown map. Conversion diagnostics are appended.
+func extractStringMap(ctx context.Context, m types.Map, diags *diag.Diagnostics) map[string]string {
+	if m.IsNull() || m.IsUnknown() {
+		return nil
+	}
+	out := map[string]string{}
+	diags.Append(m.ElementsAs(ctx, &out, false)...)
+	return out
+}

internal/services/compute/flavor_resource.go

@@ -14,12 +14,15 @@ import (
 
 	"github.com/gophercloud/gophercloud/v2"
 	"github.com/gophercloud/gophercloud/v2/openstack/compute/v2/flavors"
+	"github.com/hashicorp/terraform-plugin-framework/diag"
 	"github.com/hashicorp/terraform-plugin-framework/path"
 	"github.com/hashicorp/terraform-plugin-framework/resource"
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema"
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema/booldefault"
+	"github.com/hashicorp/terraform-plugin-framework/resource/schema/boolplanmodifier"
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema/float64planmodifier"
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema/int64default"
+	"github.com/hashicorp/terraform-plugin-framework/resource/schema/int64planmodifier"
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema/planmodifier"
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema/stringplanmodifier"
 	"github.com/hashicorp/terraform-plugin-framework/types"
@@ -53,6 +56,7 @@ type flavorModel struct {
 	RxTxFactor types.Float64 `tfsdk:"rx_tx_factor"`
 	IsPublic   types.Bool    `tfsdk:"is_public"`
 	Ephemeral  types.Int64   `tfsdk:"ephemeral"`
+	ExtraSpecs types.Map     `tfsdk:"extra_specs"`
 	Region     types.String  `tfsdk:"region"`
 }
 
@@ -63,20 +67,23 @@ func (r *flavorResource) Metadata(_ context.Context, req resource.MetadataReques
 func (r *flavorResource) Schema(_ context.Context, _ resource.SchemaRequest, resp *resource.SchemaResponse) {
 	fn := []planmodifier.String{stringplanmodifier.RequiresReplace()}
 	fnC := []planmodifier.String{stringplanmodifier.RequiresReplace(), stringplanmodifier.UseStateForUnknown()}
+	fnInt := []planmodifier.Int64{int64planmodifier.RequiresReplace()}
 	resp.Schema = schema.Schema{
-		MarkdownDescription: "Manages a compute flavor in PCD's Nova service (admin). Flavors are immutable; " +
-			"any change forces a new resource.",
+		MarkdownDescription: "Manages a compute flavor in PCD's Nova service (admin). Every attribute except " +
+			"`extra_specs` is immutable; changing one forces a new resource. `extra_specs` can be added, " +
+			"changed, or removed in place.",
 		Attributes: map[string]schema.Attribute{
 			"id":           schema.StringAttribute{Computed: true, MarkdownDescription: "The flavor ID.", PlanModifiers: []planmodifier.String{stringplanmodifier.UseStateForUnknown()}},
-			"name":         schema.StringAttribute{Required: true, MarkdownDescription: "The name of the flavor.", PlanModifiers: fn},
-			"ram":          schema.Int64Attribute{Required: true, MarkdownDescription: "Memory in MB.", PlanModifiers: []planmodifier.Int64{}},
-			"vcpus":        schema.Int64Attribute{Required: true, MarkdownDescription: "Number of vCPUs.", PlanModifiers: []planmodifier.Int64{}},
-			"disk":         schema.Int64Attribute{Required: true, MarkdownDescription: "Root disk in GB.", PlanModifiers: []planmodifier.Int64{}},
-			"flavor_id":    schema.StringAttribute{Optional: true, Computed: true, MarkdownDescription: "The desired flavor ID (auto-generated if omitted).", PlanModifiers: fnC},
-			"swap":         schema.Int64Attribute{Optional: true, Computed: true, Default: int64default.StaticInt64(0), MarkdownDescription: "Swap space in MB."},
-			"rx_tx_factor": schema.Float64Attribute{Optional: true, Computed: true, MarkdownDescription: "RX/TX factor.", PlanModifiers: []planmodifier.Float64{float64planmodifier.UseStateForUnknown()}},
-			"is_public":    schema.BoolAttribute{Optional: true, Computed: true, Default: booldefault.StaticBool(true), MarkdownDescription: "Whether the flavor is public."},
-			"ephemeral":    schema.Int64Attribute{Optional: true, Computed: true, Default: int64default.StaticInt64(0), MarkdownDescription: "Ephemeral disk in GB."},
+			"name":         schema.StringAttribute{Required: true, MarkdownDescription: "The name of the flavor. Changing this forces a new resource.", PlanModifiers: fn},
+			"ram":          schema.Int64Attribute{Required: true, MarkdownDescription: "Memory in MB. Changing this forces a new resource.", PlanModifiers: fnInt},
+			"vcpus":        schema.Int64Attribute{Required: true, MarkdownDescription: "Number of vCPUs. Changing this forces a new resource.", PlanModifiers: fnInt},
+			"disk":         schema.Int64Attribute{Required: true, MarkdownDescription: "Root disk in GB. Changing this forces a new resource.", PlanModifiers: fnInt},
+			"flavor_id":    schema.StringAttribute{Optional: true, Computed: true, MarkdownDescription: "The desired flavor ID (auto-generated if omitted). Changing this forces a new resource.", PlanModifiers: fnC},
+			"swap":         schema.Int64Attribute{Optional: true, Computed: true, Default: int64default.StaticInt64(0), MarkdownDescription: "Swap space in MB. Changing this forces a new resource.", PlanModifiers: fnInt},
+			"rx_tx_factor": schema.Float64Attribute{Optional: true, Computed: true, MarkdownDescription: "RX/TX factor. Changing this forces a new resource.", PlanModifiers: []planmodifier.Float64{float64planmodifier.RequiresReplace(), float64planmodifier.UseStateForUnknown()}},
+			"is_public":    schema.BoolAttribute{Optional: true, Computed: true, Default: booldefault.StaticBool(true), MarkdownDescription: "Whether the flavor is public. Changing this forces a new resource.", PlanModifiers: []planmodifier.Bool{boolplanmodifier.RequiresReplace()}},
+			"ephemeral":    schema.Int64Attribute{Optional: true, Computed: true, Default: int64default.StaticInt64(0), MarkdownDescription: "Ephemeral disk in GB. Changing this forces a new resource.", PlanModifiers: fnInt},
+			"extra_specs":  schema.MapAttribute{Optional: true, Computed: true, ElementType: types.StringType, MarkdownDescription: "Key/value extra specs (e.g. `hw:cpu_policy`). Can be added, changed, or removed on an existing flavor without replacing it."},
 			"region":       schema.StringAttribute{Optional: true, Computed: true, MarkdownDescription: "The region. Defaults to the provider's region.", PlanModifiers: []planmodifier.String{stringplanmodifier.UseStateForUnknown()}},
 		},
 	}
@@ -121,7 +128,18 @@ func (r *flavorResource) Create(ctx context.Context, req resource.CreateRequest,
 		return
 	}
 
+	if specs := extractStringMap(ctx, plan.ExtraSpecs, &resp.Diagnostics); len(specs) > 0 {
+		if resp.Diagnostics.HasError() {
+			return
+		}
+		if _, err := flavors.CreateExtraSpecs(ctx, client, flavor.ID, flavors.ExtraSpecsOpts(specs)).Extract(); err != nil {
+			resp.Diagnostics.AddError("compute: setting flavor extra specs", err.Error())
+			return
+		}
+	}
+
 	r.flatten(flavor, &plan)
+	resp.Diagnostics.Append(r.refreshExtraSpecs(ctx, client, flavor.ID, &plan)...)
 	resp.Diagnostics.Append(resp.State.Set(ctx, &plan)...)
 }
 
@@ -151,16 +169,55 @@ func (r *flavorResource) Read(ctx context.Context, req resource.ReadRequest, res
 	}
 
 	r.flatten(flavor, &state)
+	resp.Diagnostics.Append(r.refreshExtraSpecs(ctx, client, state.ID.ValueString(), &state)...)
 	resp.Diagnostics.Append(resp.State.Set(ctx, &state)...)
 }
 
-// Update is required by the interface but never invoked (flavors are immutable).
+// Update reconciles extra_specs — the only in-place-mutable attribute (every
+// other flavor field forces replacement).
 func (r *flavorResource) Update(ctx context.Context, req resource.UpdateRequest, resp *resource.UpdateResponse) {
-	var plan flavorModel
+	var plan, state flavorModel
 	resp.Diagnostics.Append(req.Plan.Get(ctx, &plan)...)
+	resp.Diagnostics.Append(req.State.Get(ctx, &state)...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	client, err := r.config.ComputeV2Client()
+	if err != nil {
+		resp.Diagnostics.AddError("compute: building v2 client", err.Error())
+		return
+	}
+
+	oldSpecs := extractStringMap(ctx, state.ExtraSpecs, &resp.Diagnostics)
+	newSpecs := extractStringMap(ctx, plan.ExtraSpecs, &resp.Diagnostics)
 	if resp.Diagnostics.HasError() {
 		return
 	}
+
+	id := plan.ID.ValueString()
+	for k := range oldSpecs {
+		if _, ok := newSpecs[k]; !ok {
+			if err := flavors.DeleteExtraSpec(ctx, client, id, k).ExtractErr(); err != nil {
+				resp.Diagnostics.AddError("compute: deleting flavor extra spec", err.Error())
+				return
+			}
+		}
+	}
+	changed := map[string]string{}
+	for k, v := range newSpecs {
+		if oldSpecs[k] != v {
+			changed[k] = v
+		}
+	}
+	if len(changed) > 0 {
+		if _, err := flavors.CreateExtraSpecs(ctx, client, id, flavors.ExtraSpecsOpts(changed)).Extract(); err != nil {
+			resp.Diagnostics.AddError("compute: updating flavor extra specs", err.Error())
+			return
+		}
+	}
+
+	resp.Diagnostics.Append(r.refreshExtraSpecs(ctx, client, id, &plan)...)
 	resp.Diagnostics.Append(resp.State.Set(ctx, &plan)...)
 }
 
@@ -189,6 +246,24 @@ func (r *flavorResource) ImportState(ctx context.Context, req resource.ImportSta
 	resource.ImportStatePassthroughID(ctx, path.Root("id"), req, resp)
 }
 
+// refreshExtraSpecs lists the flavor's extra specs and writes them onto the
+// model as an (always non-null) map, so state reflects the server.
+func (r *flavorResource) refreshExtraSpecs(ctx context.Context, client *gophercloud.ServiceClient, id string, m *flavorModel) diag.Diagnostics {
+	var diags diag.Diagnostics
+	specs, err := flavors.ListExtraSpecs(ctx, client, id).Extract()
+	if err != nil {
+		diags.AddError("compute: listing flavor extra specs", err.Error())
+		return diags
+	}
+	if specs == nil {
+		specs = map[string]string{}
+	}
+	sm, d := types.MapValueFrom(ctx, types.StringType, specs)
+	diags.Append(d...)
+	m.ExtraSpecs = sm
+	return diags
+}
+
 func (r *flavorResource) flatten(flavor *flavors.Flavor, m *flavorModel) {
 	m.ID = types.StringValue(flavor.ID)
 	m.FlavorID = types.StringValue(flavor.ID)

internal/services/compute/flavor_test.go

@@ -55,6 +55,73 @@ data "pcd_compute_flavor" "by_name" {
 }
 `
 
+// TestAccComputeFlavor_extraSpecs verifies extra_specs can be added, changed, and
+// removed in place (without replacing the flavor).
+func TestAccComputeFlavor_extraSpecs(t *testing.T) {
+	const rn = "pcd_compute_flavor.test"
+	var flavorID string
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:                 func() { acctest.PreCheck(t) },
+		ProtoV6ProviderFactories: acctest.ProtoV6ProviderFactories,
+		CheckDestroy:             testAccCheckFlavorDestroy(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccFlavorExtraSpecsConfig(`extra_specs = { "hw:cpu_policy" = "shared", "hw:numa_nodes" = "1" }`),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckFlavorExists(t, rn),
+					testAccCaptureID(rn, &flavorID),
+					resource.TestCheckResourceAttr(rn, "extra_specs.%", "2"),
+					resource.TestCheckResourceAttr(rn, "extra_specs.hw:cpu_policy", "shared"),
+					resource.TestCheckResourceAttr(rn, "extra_specs.hw:numa_nodes", "1"),
+				),
+			},
+			{
+				// Replace cpu_policy, remove numa_nodes, add mem_page_size.
+				Config: testAccFlavorExtraSpecsConfig(`extra_specs = { "hw:cpu_policy" = "dedicated", "hw:mem_page_size" = "large" }`),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					resource.TestCheckResourceAttrWith(rn, "id", func(v string) error {
+						if v != flavorID {
+							return fmt.Errorf("flavor was replaced (%s -> %s); extra_specs should update in place", flavorID, v)
+						}
+						return nil
+					}),
+					resource.TestCheckResourceAttr(rn, "extra_specs.%", "2"),
+					resource.TestCheckResourceAttr(rn, "extra_specs.hw:cpu_policy", "dedicated"),
+					resource.TestCheckResourceAttr(rn, "extra_specs.hw:mem_page_size", "large"),
+					resource.TestCheckNoResourceAttr(rn, "extra_specs.hw:numa_nodes"),
+				),
+			},
+			{ResourceName: rn, ImportState: true, ImportStateVerify: true},
+		},
+	})
+}
+
+func testAccFlavorExtraSpecsConfig(specs string) string {
+	return fmt.Sprintf(`
+resource "pcd_compute_flavor" "test" {
+  name  = "tf-acc-flavor-es"
+  ram   = 256
+  vcpus = 1
+  disk  = 1
+  %s
+}
+`, specs)
+}
+
+// testAccCaptureID records a resource's ID for later comparison (e.g. asserting
+// the resource was not replaced across steps).
+func testAccCaptureID(n string, dst *string) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		rs := s.RootModule().Resources[n]
+		if rs == nil {
+			return fmt.Errorf("not found in state: %s", n)
+		}
+		*dst = rs.Primary.ID
+		return nil
+	}
+}
+
 func testAccCheckFlavorExists(t *testing.T, n string) resource.TestCheckFunc {
 	return func(s *terraform.State) error {
 		rs := s.RootModule().Resources[n]