40 lines
2.0 KiB
Markdown
40 lines
2.0 KiB
Markdown
# Providers
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The provider documentation is split into three files so that a new provider
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can be specified and built from the generic rules alone, without reading how
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the existing ones happen to work.
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- **[provider-contract.md](provider-contract.md)**: what every provider MUST,
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SHOULD and MAY do, which caller depends on each rule, the behaviour profiles
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where providers are allowed to differ, the error taxonomy, credential
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hygiene, testing obligations, the checklist for adding a provider, and the
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contract's known limits. It never names an existing provider.
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- **[provider-spec-template.md](provider-spec-template.md)**: the questionnaire
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a new provider's design answers, one entry per decision the contract leaves
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open. Copy it to `docs/<type>-provider-spec.md`, fill it in, and hand it to
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the implementer with the other two files.
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- **[providers-existing.md](providers-existing.md)**: how kubernetes, gcp and
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kvm meet the contract, a table mapping each of them to every profile, their
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per-provider reference notes, shared gaps and proposed features.
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Per-provider user guides: [kvm-provider.md](kvm-provider.md),
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[gcp-vm-validation.md](gcp-vm-validation.md) and
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[gcp-in-specific-project.md](gcp-in-specific-project.md).
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Related sections of [architecture.md](architecture.md): the components table,
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[§5 what provider calls do](architecture.md#5-what-provider-calls-do-in-the-outside-world),
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[§10 tracing](architecture.md#10-tracing-internaltracing),
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[§11 provider health checks](architecture.md#11-provider-health-checks-internalproviderhealth)
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and the "Decisions" list. The test layout is in [testing.md](testing.md).
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## Reading order for a new provider
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1. The contract, end to end.
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2. The template, filled in for the new backend; every unanswered entry is a
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design decision still to make.
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3. The appendix, for a worked example of each profile the spec chose.
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4. The user guide of the existing provider closest to the new one.
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The single-file blueprint that preceded this split is in the git history of
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this path.
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