By Sebastian Stadil —

AWS Provider v6.0: What's Breaking in April 2025

This piece covers the breaking changes in Terraform AWS Provider v6.0, migration strategies, and how infrastructure automation platforms can help teams navigate the transition smoothly.

Table of Contents

  1. Release Timeline Reality Check
  2. Breaking Changes That Will Bite You
  3. Pre-Migration Audit Checklist
  4. Automated Testing Strategies
  5. Gradual Migration Patterns
  6. Multi-Region Support (Finally)
  7. Rollback Procedures
  8. Community Migration Tracker
  9. Summary Table

Release Timeline Reality Check

Plot twist: April 2025 came and went. HashiCorp pushed the AWS Provider v6.0 release to May 2025, with beta1 dropping on May 7th. The stable release? Expect it around June 18, 2025.

Here's what's weird - they originally planned for April, but the community feedback must've been intense. Beta2 hit on May 22nd. And if you're still on v5.x after stable drops, you'll only get security patches. No grace period mentioned.

Breaking Changes That Will Bite You

The Great OpsWorks Purge

All 16 OpsWorks resources? Gone. Vanished. If you're still using these in May 2025 (a full year after AWS killed the service), you've got bigger problems:

# These are dead in v6.0
resource "aws_opsworks_stack" "legacy" {
  name = "my-stack"  # RIP
}

resource "aws_opsworks_instance" "web" {
  stack_id = aws_opsworks_stack.legacy.id  # Won't work
}

Boolean Strictness (Because "1" Isn't True Anymore)

Remember when Terraform let you be lazy with booleans? Those days are over.

# Old way (v5.x) - worked but was sloppy
resource "aws_launch_template" "old_habits" {
  block_device_mappings {
    ebs {
      delete_on_termination = "1"  # Nope
      encrypted = "0"              # Also nope
    }
  }
}

# New way (v6.0) - what you should've done anyway
resource "aws_launch_template" "clean_code" {
  block_device_mappings {
    ebs {
      delete_on_termination = true
      encrypted = false
    }
  }
}

Default Flips That'll Surprise You

Redshift clusters suddenly became security-conscious:

  • publicly_accessible now defaults to false (was true - yikes)
  • encrypted now defaults to true (finally)

That EIP resource you've been using wrong? The vpc parameter is gone:

# Before
resource "aws_eip" "old" {
  vpc = true  # Dead parameter
}

# After
resource "aws_eip" "new" {
  domain = "vpc"
}

Pre-Migration Audit Checklist

Let's get practical. Run these commands before you even think about upgrading:

# Find the zombies (deprecated resources)
grep -r "aws_opsworks_\|aws_simpledb_\|aws_worklink_" . --include="*.tf"

# Hunt down lazy boolean usage
grep -r '"[01]"' . --include="*.tf" | \
  grep -E "delete_on_termination|encrypted|ebs_optimized"

# Check your provider constraints
grep -r "version.*=" . --include="*.tf" | grep aws

And here's a TFLint config that'll catch issues:

# .tflint.hcl
plugin "aws" {
  enabled = true
  version = "0.39.0"
  source = "github.com/terraform-linters/tflint-ruleset-aws"
}

rule "terraform_deprecated_lookup" {
  enabled = true
}

State backups before migration? Non-negotiable:

DATE=$(date +%Y%m%d_%H%M%S)
mkdir -p state-backups/${DATE}
terraform state pull > state-backups/${DATE}/terraform.tfstate.backup
cp .terraform.lock.hcl state-backups/${DATE}/

Automated Testing Strategies

Terratest Approach

If you're not testing your IaC, what are you even doing? Here's a basic compatibility test:

func TestV6Compatibility(t *testing.T) {
    terraformOptions := terraform.WithDefaultRetryableErrors(t, &terraform.Options{
        TerraformDir: "../infrastructure",
        Vars: map[string]interface{}{
            "test_mode": true,
        },
    })

    defer terraform.Destroy(t, terraformOptions)
    
    // Apply with current provider
    terraform.InitAndApply(t, terraformOptions)
    
    // Verify plan shows no changes
    planOutput := terraform.Plan(t, terraformOptions)
    assert.Contains(t, planOutput, "No changes")
}

CI/CD Integration

Add this to your GitHub Actions (or whatever you use):

name: Provider v6 Compatibility
on: 
  pull_request:
    paths:
      - '**.tf'
      - '.terraform.lock.hcl'

jobs:
  validate-v6:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: hashicorp/setup-terraform@v2
        with:
          terraform_version: 1.9.0
      
      - name: Test v6 compatibility
        run: |
          terraform init -upgrade
          terraform validate
          tflint --recursive --format=compact

Speaking of which - if you're managing multiple environments and provider versions, platforms like Scalr handle this complexity with policy-based controls. You can set provider version constraints per environment, which beats managing it manually across dozens of workspaces.

Gradual Migration Patterns

Module-by-Module (The Sane Way)

Start with your least critical modules. I usually go:

  1. Development utilities (nobody cares if these break)
  2. Shared networking (VPCs, subnets - boring but stable)
  3. Data resources (S3 buckets, RDS - test thoroughly)
  4. Compute resources (EC2, ECS - where the action is)
  5. Production critical (only after everything else works)

For each module:

# modules/networking/versions.tf
terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 6.0.0-beta2"  # Start with beta
    }
  }
}

Environment Progression

My coffee's getting cold as I write this, but here's the pattern that works:

  • Dev: Deploy beta immediately, break things
  • Staging: Stable v6.0 after dev survives a week
  • Production: Exact version pin, no surprises
# environments/production/versions.tf
terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "= 6.0.0"  # Exact pin for prod
    }
  }
}

Multi-Region Support (Finally)

This is actually cool. No more provider alias gymnastics:

provider "aws" {
  region = "us-east-1"
}

# Default region resource
resource "aws_s3_bucket" "main" {
  bucket = "my-main-bucket"
}

# Override region inline
resource "aws_s3_bucket" "backup" {
  bucket = "my-backup-bucket"
  region = "eu-west-1"  # Just works now
}

# Cross-region replication without aliases
resource "aws_s3_bucket_replication_configuration" "cross_region" {
  bucket = aws_s3_bucket.main.id
  
  rule {
    id     = "backup"
    status = "Enabled"
    
    destination {
      bucket = aws_s3_bucket.backup.arn
      # No provider alias needed!
    }
  }
}

Rollback Procedures

When (not if) things go sideways:

Quick Rollback

# 1. Revert provider version in versions.tf
# 2. Clean the provider cache
rm -rf .terraform/
rm .terraform.lock.hcl

# 3. Reinitialize
terraform init

# 4. If state is corrupted
terraform state push state-backups/[timestamp]/terraform.tfstate.backup

State Surgery

For the dreaded "resource instance managed by newer provider version" error:

# Remove problematic resource
terraform state rm aws_instance.borked

# Re-import with old provider
terraform import aws_instance.borked i-1234567890abcdef0

You know what helps here? Infrastructure management platforms that version your state files automatically. Scalr, for instance, keeps state history so you can roll back without hunting for backup files. But I'm not here to sell you anything.

Community Migration Tracker

The Terraform community's tracking this migration in various places:

  • GitHub Issue #41101: The official megathread
  • r/Terraform: Real engineers sharing war stories
  • HashiCorp Discuss: Where the pros hang out

One team built a Grafana dashboard tracking their 847-module migration. Another used AWS Migration Factory with QuickSight. Whatever works.

Summary Table

Breaking Change Impact Migration Effort Rollback Risk
OpsWorks removal High if used Complete rewrite Low
Boolean strictness Medium Find & replace Low
Default value changes High Test extensively Medium
SimpleDB/WorkLink removal Low Stay on v5.x Low
EIP vpc parameter Low Simple update Low
Multi-region support Positive Refactor aliases Low

The bottom line? Test in dev, migrate incrementally, keep backups. And maybe consider using a platform that handles provider version management across teams - but hey, that's just me thinking out loud.

What strikes me about this v6.0 release is how long it's been coming. We've known about these deprecations forever. If you're scrambling now, in late May 2025, you've had plenty of warning. The multi-region support alone makes the migration worth it, assuming you've cleaned up your technical debt.

Start your migration this week. Or don't. Your on-call rotation, your choice.