Terramantle Blog https://terramantle.dev/blog Practitioner writing on private Terraform and OpenTofu registries. en-gb The open source Terraform registry landscape, honestly reviewed https://terramantle.dev/blog/terraform-registry-oss-comparison https://terramantle.dev/blog/terraform-registry-oss-comparison Fri, 30 Oct 2026 09:00:00 GMT Rhys Terrareg, Terralist, Terrakube, and citizen compared on scope, auth, storage, and maintenance, checked against the projects as they stand. The Terraform registry protocol, explained https://terramantle.dev/blog/terraform-registry-protocol-explained https://terramantle.dev/blog/terraform-registry-protocol-explained Fri, 16 Oct 2026 09:00:00 GMT Rhys Real HTTP transcripts for service discovery, versions, and the X-Terraform-Get download hop, plus the auth mistake that makes a naive registry decorative. Terraform module naming conventions that actually matter https://terramantle.dev/blog/terraform-module-naming-conventions https://terramantle.dev/blog/terraform-module-naming-conventions Fri, 04 Sep 2026 09:00:00 GMT Rhys Two naming decisions genuinely matter because consumers depend on them; the rest is bikeshedding. Repo names, source addresses, and namespaces. Publishing Terraform modules with OIDC, no long-lived tokens https://terramantle.dev/blog/publish-terraform-modules-oidc https://terramantle.dev/blog/publish-terraform-modules-oidc Fri, 14 Aug 2026 09:00:00 GMT Rhys How GitHub Actions OIDC actually works, the AWS IAM parallel you already know, and a full worked publish workflow with nothing stored to leak. Versioning internal Terraform modules properly https://terramantle.dev/blog/terraform-module-versioning https://terramantle.dev/blog/terraform-module-versioning Fri, 24 Jul 2026 09:00:00 GMT Rhys The maturity ladder from copy-paste to a registry, what a breaking change actually is in HCL, and the consumer-visibility gap that stalls upgrades. Polyrepo versioning with monorepo speed https://terramantle.dev/blog/polyrepo-versioning-monorepo-speed https://terramantle.dev/blog/polyrepo-versioning-monorepo-speed Tue, 21 Jul 2026 09:00:00 GMT Rhys The monorepo-versus-polyrepo fight is a false choice. What teams want is polyrepo semantics at monorepo speed, and the registry is the missing piece. HCP Terraform free tier is gone. What a private registry costs now https://terramantle.dev/blog/hcp-terraform-rum-pricing-escape https://terramantle.dev/blog/hcp-terraform-rum-pricing-escape Fri, 17 Jul 2026 09:00:00 GMT Rhys The RUM maths worked through with real numbers, and five escape routes priced fairly, from staying under the cap to self-hosting.