Devise engineering operation DNS specification

[jrcasso]

The latest build of develop has broken due to hosted-zone DNS incompatibilities between this application repository and other, private repositories.

Error: error deleting Route53 Hosted Zone (Z10119153JUFTJ7KUFK46): HostedZoneNotEmpty: The specified hosted zone contains non-required resource record sets  and so cannot be deleted.
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78 | status code: 400, request id: 8fd5e0b9-a97e-42b6-bc3a-6752fd7fc3b9

Personal infrastructure has grown beyond the scope of this application and now needs its own repository and accompanying Terraform configuration.

[jrcasso]

[jrcasso]

An operation depends on an organization.
An application depends on an operation.

The effective definition of an "organization" in this design is simply some DNS zone under our control. Typically that will be a root domain, but it can also be subdomains.

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Separate private repositories have been produced as a result of research and work into this issue:

• terraform-aws-applications: networking infrastructure for an application meeting these specifications. Tiny-sized.
• terraform-aws-operations: networking infrastructure for an operations meeting these specifications. Medium-sized.
• k8s-cluster: an application implementing terraform-aws-application to establish an idempotent deployment of an application Kubernetes cluster as defined in the green block in section 3.

[jrcasso]

Might consider just upgrading this to an IPv6 scheme.

[jrcasso]

The infrastructure scheme underlying this structure has been deployed; helm has been added to this project.

[jrcasso]

https://github.com/jrcasso/terraform-aws-organizations

https://github.com/jrcasso/terraform-aws-operations

https://github.com/jrcasso/terraform-aws-applications

[jrcasso]

Added a bonus organizations infrastructure module. Under the current paradigm, a domain is associated with an organization. That does not preclude configurations where multiple domains belong to a single organization, or a configuration where this domain can be modified to a subdomain. There should be no loss in the extensibility of this structure.