Azure App Service – Consider Upgrading Isolated Service Plans to v2

App Service Isolated v2 plans offer significant performance improvements and cost optimization opportunities for organizations running Azure App Services. This policy provides guidance on evaluating and migrating to the more cost-effective Isolated v2 service plans.

Why This Policy Matters

Azure App Service Isolated v2 plans represent a strategic opportunity for organizations to:

Reduce infrastructure costs

Improve application performance

Optimize resource utilization

Performance and Cost Benefits

The Isolated v2 pricing tier delivers substantial advantages over previous generations.

Improved Resource Allocation:

Nearly double CPU and RAM compared to previous plans

Eliminates per-instance stamp fees

Potential for running applications on fewer instances

Comparative Cost Analysis

Isolated v1 Plan (I2):

2 cores

7 GB RAM

1 TB storage

Monthly cost: $555

Additional stamp fee: $991

Total monthly cost: $1,546

Isolated v2 Plan (I1v2):

2 cores

8 GB RAM

1 TB storage

Monthly cost: $293

No stamp fee

Total monthly cost: $293

Potential Savings: 81%

Additional Financial Advantages

Eligibility for Azure savings plans

Reserved instance pricing options

More predictable cost structure

Implementation Guide

Infrastructure as Code Migration (Terraform Example)

Before (v1 Isolated Plan)

resource "azurerm_app_service_plan" "example" {
  sku {
    tier = "Isolated"
    size = "I2"
  }
}

resource "azurerm_app_service_plan" "example" {
  sku {
    tier = "Isolated"
    size = "I2"
  }
}

resource "azurerm_app_service_plan" "example" {
  sku {
    tier = "Isolated"
    size = "I2"
  }
}

After (v2 Isolated Plan)

resource "azurerm_app_service_plan" "example" {
  sku {
    tier = "IsolatedV2"
    size = "I1v2"
  }
}

resource "azurerm_app_service_plan" "example" {
  sku {
    tier = "IsolatedV2"
    size = "I1v2"
  }
}

resource "azurerm_app_service_plan" "example" {
  sku {
    tier = "IsolatedV2"
    size = "I1v2"
  }
}

Manual Migration Steps

• Assess current app service requirements

• Verify application compatibility with v2 plans

• Create backup of existing environment

• Provision new Isolated v2 service plan

Migrate application configurations

• Perform comprehensive testing

• Validate performance and cost savings

Recommended Best Practices

Conduct thorough performance testing

• Use staging environments for validation

• Monitor application metrics during migration

• Implement gradual rollout strategy

Optimization Tools

Infracost enables organizations to:

Estimate potential cost savings

Identify optimization opportunities

Prevent unnecessary infrastructure expenses

Provide real-time cost visibility during infrastructure planning

Example Scenarios

• Scenario 1: Enterprise Web Application

• Current setup: Multiple I2 isolated instances

• Potential migration savings: Up to 75% on infrastructure costs

Improved resource efficiency

• Scenario 2: High-Traffic Digital Platform

• Reduced instance count from 4 to 2

Maintained performance levels

Significant cost reduction

Considerations and Caveats

Potential Limitations

Not all applications may be immediately compatible

Requires comprehensive testing

Potential minor configuration adjustments

Migration Risks

Temporary performance variations

Potential downtime during migration

Complexity of legacy application transitions

Frequently Asked Questions (FAQs)

How quickly can I realize cost savings?
Typically within 1-2 billing cycles after successful migration.

Are there any hidden costs in Isolated v2 plans?
No additional hidden costs; the pricing is transparent with no stamp fees.

Can all applications migrate to Isolated v2 immediately?
Not necessarily. Compatibility testing and potential minor modifications may be required.

How does Infracost help with this migration?
Infracost provides cost estimation, identifies optimization opportunities, and helps prevent unnecessary infrastructure expenses.

What’s the recommended migration approach?
Gradual migration with comprehensive testing, starting with non-critical applications.