add support for image family (GoogleCloudPlatform#54)

Problem: the user wants to use a custom image family,
and currently the families are hard coded.
Solution: add the family name as a variable.

Signed-off-by: vsoch <vsoch@users.noreply.github.com>
Co-authored-by: vsoch <vsoch@users.noreply.github.com>

fluxfw-gcp/tf/main.tf

@@ -15,6 +15,7 @@
 module "management_node" {
     source             = "./modules/management"
     name_prefix        = var.manager_name_prefix
+    family             = var.manager_family  
 
     project_id         = var.project_id
     region             = var.region
@@ -44,6 +45,8 @@ module "login_nodes" {
     region          = var.region
 
     name_prefix     = each.value.name_prefix
+    family          = var.login_family
+
     subnetwork      = var.subnetwork
     machine_arch    = each.value.machine_arch
     machine_type    = each.value.machine_type
@@ -69,6 +72,9 @@ module "compute_nodes" {
     project_id        = var.project_id
     region            = var.region
 
+    family            = var.compute_family
+    arm_family        = var.compute_arm_family
+
     name_prefix       = each.value.name_prefix
     subnetwork        = var.subnetwork
     machine_arch      = each.value.machine_arch

fluxfw-gcp/tf/modules/compute/main.tf

@@ -14,12 +14,12 @@
 
 data "google_compute_image" "fluxfw_compute_arm64_image" {
     project = var.project_id
-    family  = "flux-fw-compute-arm64"
+    family  = var.arm_family
 }
 
 data "google_compute_image" "fluxfw_compute_x86_64_image" {
     project = var.project_id
-    family  = "flux-fw-compute-x86-64"
+    family  = var.family
 }
 
 data "google_compute_zones" "available" {

fluxfw-gcp/tf/modules/compute/variables.tf

@@ -12,6 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+variable "arm_family" {
+    description = "The source arm image family prefix to use"
+    type        = string
+    default     = "flux-fw-compute-arm64"
+}
+
 variable "automatic_restart" {
   type        = bool
   description = "(Optional) Specifies whether the instance should be automatically restarted if it is terminated by Compute Engine (not terminated by a user)."
@@ -30,6 +36,12 @@ variable "compact_placement" {
     default     = false
 }
 
+variable "family" {
+    description = "The source X86 image family prefix to use"
+    type        = string
+    default     = "flux-fw-compute-x86-64"
+}
+
 variable "gpu" {
     description = "The type and count of GPU(s) to attach to a compute node"
     type        = object({

fluxfw-gcp/tf/modules/login/main.tf

@@ -14,7 +14,7 @@
 
 data "google_compute_image" "fluxfw_login_x86_64_image" {
     project = var.project_id
-    family  = "flux-fw-login-x86-64"
+    family  = var.family
 }
 
 data "google_compute_zones" "available" {

fluxfw-gcp/tf/modules/login/variables.tf

@@ -18,6 +18,12 @@ variable "boot_script" {
     default     = null
 }
 
+variable "family" {
+    description = "The source image family prefix to use"
+    type        = string
+    default     = "flux-fw-login-x86-64"
+}
+
 variable "machine_arch" {
     description = "The instruction set architecture, ARM64 or x86_64, used by the login node"
     type        = string

fluxfw-gcp/tf/modules/management/main.tf

@@ -14,7 +14,7 @@
 
 data "google_compute_image" "fluxfw_manager_image" {
     project = var.project_id
-    family  = "flux-fw-manager"
+    family  = var.family
 }
 
 module "flux_manager_instance_template" {

fluxfw-gcp/tf/modules/management/variables.tf

@@ -17,6 +17,12 @@ variable "compute_node_specs" {
     type        = string
 }
 
+variable "family" {
+    description = "The source image family prefix to use"
+    type        = string
+    default     = "flux-fw-manager"
+}
+
 variable "login_node_specs" {
     description = "A JSON encoded list of maps each with the keys: 'name_prefix', 'machin_arch', 'machine_type', and 'instances' which describe the login node instances to create"
     type        = string

fluxfw-gcp/tf/variables.tf

@@ -17,6 +17,18 @@ variable "cluster_storage" {
     type        = map(string)
 }
 
+variable "compute_arm_family" {
+    description = "The source arm image family prefix to be used by the compute node(s)"
+    type        = string
+    default     = "flux-fw-compute-arm64"
+}
+
+variable "compute_family" {
+    description = "The source image x86 prefix to be used by the compute node(s)"
+    type        = string
+    default     = "flux-fw-compute-x86-64"
+}
+
 variable "compute_node_specs" {
     description = "A list of compute node specifications"
     type = list(object({
@@ -39,6 +51,14 @@ variable "compute_scopes" {
     type        = set(string)
 }
 
+
+variable "login_family" {
+    description = "The source image prefix to be used by the login node"
+    type        = string
+    default     = "flux-fw-login-x86-64"
+}
+
+
 variable "login_node_specs" {
     description = "A list of login node specifications"
     type = list(object({
@@ -58,6 +78,12 @@ variable "login_scopes" {
     type = set(string)
 }
 
+variable "manager_family" {
+    description = "The source image prefix to be used by the manager"
+    type        = string
+    default     = "flux-fw-manager"
+}
+
 variable "manager_machine_type" {
     description = "The Compute Engine machine type to be used for the management node [note: must be an x86_64 or AMD machine type]"
     type        = string