auto scale azure spring app URI with terraform - terraform

Question

I need enable auto scale for an spring app hosted by spring app services.I am used below terraform code.
resource "azurerm_monitor_autoscale_setting" "spring_apps_app_carrier_events" {
name = "default_auto_scale"
enabled = true
resource_group_name = module.rg.resource_group_name
location = module.rg.resource_group_location
target_resource_id = module.spring_apps_app_carrier_events.app_identities[0].principal_id
profile {
name = "defaultProfile"
capacity {
default = 1
minimum = 1
maximum = 2
}
It return errors:
Error: Can not parse "target_resource_id" as a resource id: Cannot parse Azure ID: parse "290dc6bd-1895-4e52-bac2-a34e63a138a9": invalid URI for request
It seems it need a uri. May u know how can I get the uri of a spring app?
Thanks in advance

Answer 1

I tried to reproduce the same in my environment.
Received the same error:
│ Error: Can not parse "target_resource_id" as a resource id: Cannot parse Azure ID: parse "xxxxx": invalid URI for request
│ with azurerm_monitor_autoscale_setting.spring_apps_app_carrier_events,
The target_resource_id should not be in just number id form,
It has to be something like /subscriptions/xxxxxc/resourceGroups/<myrg>/providers/Microsoft.xxx/xx/sxx
In your case,
target_resource_id = module.spring_apps_app_carrier_events.app_identities[0].principal_id
gives the principal Id which is in “23434354544466” format which is not correct.
I tried below code with targetid being, resourceId : /subscriptions/xxx/resourceGroups/ <myrg>/providers/Microsoft.AppPlatform/spring/springcloudappkavya/apps/kaexamplspringcloudapp/deployments/kavyadeploy1
Code:
resource "azurerm_spring_cloud_service" "example" {
name = "springcloudappkavya"
location =data.azurerm_resource_group.example.location
resource_group_name = data.azurerm_resource_group.example.name
sku_name = "S0"
config_server_git_setting {
uri = "https://github.com/Azure-Samples/piggymetrics"
label = "config"
search_paths = ["dir1", "dir2"]
}
trace {
connection_string = azurerm_application_insights.example.connection_string
sample_rate = 10.0
}
tags = {
Env = "staging"
}
}
resource "azurerm_spring_cloud_app" "example" {
name = "kaexamplspringcloudapp"
resource_group_name = data.azurerm_resource_group.example.name
service_name = azurerm_spring_cloud_service.example.name
identity {
type = "SystemAssigned"
}
}
resource "azurerm_spring_cloud_java_deployment" "test" {
name = "kavyadeploy1"
spring_cloud_app_id = azurerm_spring_cloud_app.example.id
instance_count = 2
jvm_options = "-XX:+PrintGC"
quota {
cpu = "2"
memory = "4Gi"
}
runtime_version = "Java_11"
environment_variables = {
"Foo" : "Bar"
"Env" : "Staging"
}
}
resource "azurerm_monitor_autoscale_setting" "spring_apps_app_carrier_events" {
name = "default_auto_scale"
enabled = true
resource_group_name = data.azurerm_resource_group.example.name
location = data.azurerm_resource_group.example.location
target_resource_id = azurerm_spring_cloud_java_deployment.test.id
// target_resource_id = .spring_apps_app_carrier_events.app_identities[0].principal_id
// target_resource_id = "18xxxxxe2"
profile {
name = "metricRules"
capacity {
default = 1
minimum = 1
maximum = 2
}
rule {
metric_trigger {
dimensions {
name = "AppName"
operator = "Equals"
values = [azurerm_spring_cloud_app.example.name]
}
dimensions {
name = "Deployment"
operator = "Equals"
values = [azurerm_spring_cloud_java_deployment.test.name]
}
metric_name = "AppCpuUsage"
metric_namespace = "microsoft.appplatform/spring"
metric_resource_id = azurerm_spring_cloud_service.example.id
time_grain = "PT1M"
statistic = "Average"
time_window = "PT5M"
time_aggregation = "Average"
operator = "GreaterThan"
threshold = 75
}
scale_action {
direction = "Increase"
type = "ChangeCount"
value = 1
cooldown = "PT1M"
}
}
}
}
Could execute without errors.
Portal view of Autoscale settings for spring apps.
Reference : An Azure Spring Cloud Update: Managed Virtual Network and Autoscale are now generally available in Azure Spring Cloud