feat: add a static inbound option for the private dns resolver

[MacMur85]

Description

Change is adding a private_ip_address support to Private DNS Resolver inbound endpoint and extends the inbound_endpoint_config variable in the Private DNS Resolver module to support static IP address assignment for the inbound endpoint.

Changes

• Added private_ip_address as an optional field to the inbound_endpoint_config object type
• Updated azurerm_private_dns_resolver_inbound_endpoint to conditionally pass private_ip_address to the ip_configurations block only when private_ip_allocation_method is set to "Static"

Validations

Two validation rules have been added to the inbound_endpoint_config variable:

1. Allowed values - private_ip_allocation_method must be either "Static" or "Dynamic". Any other value will fail at plan time.
2. Conditional requirement - private_ip_address must be provided when private_ip_allocation_method is set to "Static". If omitted, Terraform will fail at plan time with a descriptive error message.

Usage

No breaking changes. Existing callers using "Dynamic" allocation do not need to update their configuration - private_ip_address defaults to null and is silently ignored.

Context

• Added private_ip_address as an optional field to the inbound_endpoint_config object type
• Updated azurerm_private_dns_resolver_inbound_endpoint to conditionally pass private_ip_address to the ip_configurations block only when private_ip_allocation_method is set to "Static"

Validations

Two validation rules have been added to the inbound_endpoint_config variable:

1. Allowed values - private_ip_allocation_method must be either "Static" or "Dynamic". Any other value will fail at plan time.
2. Conditional requirement - private_ip_address must be provided when private_ip_allocation_method is set to "Static". If omitted, Terraform will fail at plan time with a descriptive error message.

Usage

No breaking changes. Existing callers using "Dynamic" allocation do not need to update their configuration - private_ip_address defaults to null and is silently ignored.

# Static allocation - private_ip_address required
inbound_endpoint_config = {
  name                         = "dns-resolver-inbound-prod"
  private_ip_allocation_method = "Static"
  subnet_id                    = azurerm_subnet.dns_inbound.id
  private_ip_address           = "10.100.7.4"
}

Type of changes

• Refactoring (non-breaking change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would change existing functionality)
• Bug fix (non-breaking change which fixes an issue)

Checklist

• I am familiar with the contributing guidelines
• I have followed the code style of the project
• I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming

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Sensitive Information Declaration

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• I confirm that neither PII/PID nor sensitive data are included in this PR and the codebase changes.

[nc-shahidazim]

Approved

[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 SonarQube Cloud