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UPGRADE-4.0.md

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Upgrade from v3.x to v4.x

If you have any questions regarding this upgrade process, please consult the examples directory:

If you find a bug, please open an issue with supporting configuration to reproduce.

List of backwards incompatible changes

  • The minimum required Terraform version is now 1.0
  • The minimum required AWS provider version is now 4.x (4.35.0 at time of writing)
  • assign_ipv6_address_on_creation has been removed; use the respective subnet type equivalent instead (i.e. - public_subnet_assign_ipv6_address_on_creation)
  • enable_classiclink has been removed; it is no longer supported by AWS hashicorp/terraform#31730
  • enable_classiclink_dns_support has been removed; it is no longer supported by AWS hashicorp/terraform#31730

Additional changes

Modified

  • map_public_ip_on_launch now defaults to false
  • enable_dns_hostnames now defaults to true
  • enable_dns_support now defaults to true
  • manage_default_security_group now defaults to true
  • manage_default_route_table now defaults to true
  • manage_default_network_acl now defaults to true
  • The default name for the default security group, route table, and network ACL has changed to fallback to append -default to the VPC name if a specific name is not provided
  • The default fallback value for outputs has changed from an empty string to null

Variable and output changes

  1. Removed variables:

    • assign_ipv6_address_on_creation has been removed; use the respective subnet type equivalent instead (i.e. - public_subnet_assign_ipv6_address_on_creation)
    • enable_classiclink has been removed; it is no longer supported by AWS hashicorp/terraform#31730
    • enable_classiclink_dns_support has been removed; it is no longer supported by AWS hashicorp/terraform#31730

  2. Renamed variables:

    • None

  3. Added variables:

    • VPC
      • ipv6_cidr_block_network_border_group
      • enable_network_address_usage_metrics
    • Subnets
      • *_subnet_enable_dns64 for each subnet type
      • *_subnet_enable_resource_name_dns_aaaa_record_on_launch for each subnet type
      • *_subnet_enable_resource_name_dns_a_record_on_launch for each subnet type
      • *_subnet_ipv6_native for each subnet type
      • *_subnet_private_dns_hostname_type_on_launch for each subnet type

  4. Removed outputs:

    • None

  5. Renamed outputs:

    • None

  6. Added outputs:

    • None

State Changes

None