AVD host pool and scaling plan assignment issues - azure

Question

I am fairly new to Terraform so I'm still learning the more advanced elements of the language.
I have created a template that creates 4 azure virtual desktop host pools. I have also created within the same template scaling plans and was trying to create a for_each loop, on the scaling plan, however when it comes to the hostpool_id requirement on the scaling plan I am not sure how to get it to cycle through the 4 hostpool ids that will be created.
MAIN
#############
# HOSTPOOLS #
#############
resource "azurerm_virtual_desktop_host_pool" "developer_dev" {
name = var.developer_dev_hostpool.name
resource_group_name = var.rg_avd_name
location = var.rg_avd_location
friendly_name = var.developer_dev_hostpool.friendly_name
description = var.developer_dev_hostpool.description
type = var.developer_dev_hostpool.type
maximum_sessions_allowed = var.developer_dev_hostpool.max_sessions
load_balancer_type = var.developer_dev_hostpool.lb_type
scheduled_agent_updates {
enabled = true
timezone = "GMT Standard Time"
schedule {
day_of_week = "Saturday"
hour_of_day = "02"
}
}
}
resource "azurerm_virtual_desktop_host_pool" "developer_prod" {
name = var.developer_prod_hostpool.name
resource_group_name = var.rg_avd_name
location = var.rg_avd_location
friendly_name = var.developer_prod_hostpool.friendly_name
description = var.developer_prod_hostpool.description
type = var.developer_prod_hostpool.type
maximum_sessions_allowed = var.developer_prod_hostpool.max_sessions
load_balancer_type = var.developer_prod_hostpool.lb_type
scheduled_agent_updates {
enabled = true
timezone = "GMT Standard Time"
schedule {
day_of_week = "Saturday"
hour_of_day = "02"
}
}
}
resource "azurerm_virtual_desktop_host_pool" "front_office" {
name = var.front_office_hostpool.name
resource_group_name = var.rg_avd_name
location = var.rg_avd_location
friendly_name = var.front_office_hostpool.friendly_name
description = var.front_office_hostpool.description
type = var.front_office_hostpool.type
maximum_sessions_allowed = var.front_office_hostpool.max_sessions
load_balancer_type = var.front_office_hostpool.lb_type
scheduled_agent_updates {
enabled = true
timezone = "GMT Standard Time"
schedule {
day_of_week = "Saturday"
hour_of_day = "02"
}
}
}
resource "azurerm_virtual_desktop_host_pool" "back_office" {
name = var.back_office_hostpool.name
resource_group_name = var.rg_avd_name
location = var.rg_avd_location
friendly_name = var.back_office_hostpool.friendly_name
description = var.back_office_hostpool.description
type = var.back_office_hostpool.type
maximum_sessions_allowed = var.back_office_hostpool.max_sessions
load_balancer_type = var.back_office_hostpool.lb_type
scheduled_agent_updates {
enabled = true
timezone = "GMT Standard Time"
schedule {
day_of_week = "Saturday"
hour_of_day = "02"
}
}
}
#################
# SCALING PLANS #
#################
resource "azurerm_virtual_desktop_scaling_plan" "sp_weekdays_developer" {
for_each = var.sp_weekdays
name = each.value.sp_name
resource_group_name = var.rg_avd_name
location = var.rg_avd_location
friendly_name = each.value.sp_friendly_name
description = each.value.sp_description
time_zone = "GMT Standard Time"
schedule {
name = each.value.sch_name
days_of_week = ["Monday","Tuesday","Wednesday","Thursday","Friday"]
ramp_up_start_time = "07:30"
ramp_up_load_balancing_algorithm = each.value.lb_alg
ramp_up_minimum_hosts_percent = each.value.ramp_up_min_hosts
ramp_up_capacity_threshold_percent = each.value.ramp_up_cap_threshold
peak_start_time = "08:00"
peak_load_balancing_algorithm = each.value.lb_alg
ramp_down_start_time = "18:00"
ramp_down_load_balancing_algorithm = each.value.lb_alg
ramp_down_minimum_hosts_percent = "80"
ramp_down_force_logoff_users = true
ramp_down_wait_time_minutes = "60"
ramp_down_notification_message = "Your session will be logged off shortly, please save your work."
ramp_down_capacity_threshold_percent = "20"
ramp_down_stop_hosts_when = "ZeroActiveSessions"
off_peak_start_time = "20:00"
off_peak_load_balancing_algorithm = each.value.lb_alg
}
host_pool {
hostpool_id = azurerm_virtual_desktop_host_pool.developer_dev.id
scaling_plan_enabled = true
}
}
variables
######################
# HOSTPOOL VARIABLES #
######################
variable "developer_dev_hostpool" {
default = {
name = "avdhp-developer-dev-uks-001"
friendly_name = "Developer – Development"
description = "Hostpool for developers and contractors working in the development environment"
type = "Pooled"
max_sessions = "8"
lb_type = "DepthFirst"
}
}
variable "developer_prod_hostpool" {
default = {
name = "avdhp-developer-prod-uks-001"
friendly_name = "Developer – Production"
description = "Hostpool for developers and contractors working in the production environment"
type = "Pooled"
max_sessions = "8"
lb_type = "DepthFirst"
}
}
variable "front_office_hostpool" {
default = {
name = "avdhp-front-office-uks-001"
friendly_name = "Front Office"
description = "Hostpool for front office staff"
type = "Pooled"
max_sessions = "16"
lb_type = "BreadthFirst"
}
}
variable "back_office_hostpool" {
default = {
name = "avdhp-back-office-uks-001"
friendly_name = "Back Office "
description = "Hostpool for back office staff"
type = "Pooled"
max_sessions = "12"
lb_type = "DepthFirst"
}
}
##########################
# SCALING PLAN VARIABLES #
##########################
variable "sp_weekdays" {
description = "scaling plan for weekdays"
default = {
developer_dev = {
sp_name = "avdsp1"
sp_friendly_name = "Developer Weekday Scaling Plan"
sp_description = "This scaling plan is for the developers during the week."
sch_name = "Weekdays"
lb_alg = "DepthFirst"
ramp_up_min_hosts = "50"
ramp_up_cap_threshold = "60"
}
developer_prod = {
sp_name = "avdsp3"
sp_friendly_name = "Developer Weekday Scaling Plan"
sp_description = "This scaling plan is for the developers during the week."
sch_name = "Weekdays"
lb_alg = "DepthFirst"
ramp_up_min_hosts = "50"
ramp_up_cap_threshold = "60"
}
back_office = {
sp_name = "avdsp4"
sp_friendly_name = "Back Office Weekday Scaling Plan"
sp_description = "This scaling plan is for the back office during the week."
sch_name = "Weekdays"
lb_alg = "DepthFirst"
ramp_up_min_hosts = "50"
ramp_up_cap_threshold = "60"
}
front_office = {
sp_name = "avdsp5"
sp_friendly_name = "Front Office Weekday Scaling Plan"
sp_description = "This scaling plan is for the front office during the week."
sch_name = "Weekdays"
lg_alg = "BreadthFirst"
ramp_up_min_hosts = "30"
ramp_up_cap_threshold = "75"
}
}
}