[IOCOM-1734] Scale down APIM to 2 instances

[Krusty93]

List of changes

Restore original value

Motivation and context

Removed App web traffic from APIM

Type of changes

• Add new resources
• Update configuration to existing resources
• Remove existing resources

Env to apply

• DEV
• UAT
• PROD

Does this introduce a change to production resources with possible user impact?

• Yes, users may be impacted applying this change
• No

Does this introduce an unwanted change on infrastructure? Check terraform plan execution result

• Yes
• No

Other information

---

If PR is partially applied, why? (reserved to mantainers)

How to apply

After PR is approved

1. run deploy pipeline from Azure DevOps io-platform-iac-projects
2. select PR branch
3. wait for approval

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[mamu0]

LGTM

[github-actions]

📖 Terraform Plan ('src/common/prod') - success

Terraform Plan

module.application_gateway_weu.data.azurerm_linux_web_app.fims_op_app: Still reading... [10s elapsed]
module.application_gateway_weu.data.azurerm_linux_web_app.appservice_selfcare_be: Still reading... [10s elapsed]
data.azurerm_linux_web_app.app_backendl2: Still reading... [10s elapsed]
data.azurerm_linux_function_app.function_assets_cdn: Still reading... [10s elapsed]
data.azurerm_linux_web_app.app_backendl1: Still reading... [10s elapsed]
module.application_gateway_weu.data.azurerm_linux_web_app.cms_backoffice_app_itn: Still reading... [10s elapsed]
module.application_gateway_weu.data.azurerm_linux_web_app.appservice_continua: Still reading... [10s elapsed]
data.azurerm_linux_web_app.firmaconio_selfcare_web_app: Still reading... [10s elapsed]
module.application_gateway_weu.data.azurerm_linux_web_app.appservice_devportal_be: Still reading... [10s elapsed]
module.application_gateway_weu.data.azurerm_linux_web_app.session_manager: Still reading... [10s elapsed]

Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
  ~ update in-place

Terraform will perform the following actions:

  # module.application_gateway_weu.azurerm_web_application_firewall_policy.api_app will be updated in-place
  ~ resource "azurerm_web_application_firewall_policy" "api_app" {
        id                  = "/subscriptions/ec285037-c673-4f58-b594-d7c480da4e8b/resourceGroups/io-p-rg-external/providers/Microsoft.Network/applicationGatewayWebApplicationFirewallPolicies/io-p-waf-appgateway-api-app-policy"
        name                = "io-p-waf-appgateway-api-app-policy"
        tags                = {
            "CostCenter"  = "TS310 - PAGAMENTI & SERVIZI"
            "CreatedBy"   = "Terraform"
            "Environment" = "Prod"
            "Owner"       = "IO"
            "Source"      = "https://github.com/pagopa/io-infra"
        }
        # (4 unchanged attributes hidden)

      ~ policy_settings {
          ~ request_body_inspect_limit_in_kb = 0 -> 128
            # (5 unchanged attributes hidden)
        }

        # (1 unchanged block hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

Warning: Argument is deprecated

  with module.application_gateway_weu.azurerm_web_application_firewall_policy.api_app,
  on ../_modules/application_gateway/firewall.tf line 60, in resource "azurerm_web_application_firewall_policy" "api_app":
  60:       rule_group_override {

`disabled_rules` will be removed in favour of the `rule` property in version
4.0 of the AzureRM Provider.

(and 22 more similar warnings elsewhere)

─────────────────────────────────────────────────────────────────────────────

Note: You didn't use the -out option to save this plan, so Terraform can't
guarantee to take exactly these actions if you run "terraform apply" now.