k8s

README

k8s

Kubernetes clusters as Pulumi components, behind one provider-neutral contract.

Provisions the cluster and the things a cluster needs around it — the network, the peering, a registry pull-through cache, a backup store — as Pulumi ComponentResources with documented child names and names the caller supplies. EKS Auto Mode is the first provider; self-hosted Talos is the second. Whichever provider made it, the consumer of a cluster sees the same thing: a name, an endpoint, a CA, an OIDC issuer and a set of capabilities.

What	Where
Go module github.com/truvity/k8s	go get github.com/truvity/k8s@v0.1.0
pkg/cluster — the provider-neutral contract: outputs and capabilities, with a validator	Go package, no cloud dependency
pkg/aws/pullthroughcache — ECR pull-through cache rules and their credential secrets, truvity:k8s/aws:PullThroughCache	Pulumi component, unreleased
pkg/aws/backupbucket — a versioned, KMS-encrypted cross-account backup bucket with version deletion denied, optional Object Lock and cross-region replica, truvity:k8s/aws:BackupBucket	Pulumi component, unreleased

The provider packages (EKS first) are not in v0.1.0; they arrive one reviewed extraction at a time and are listed in the CHANGELOG. The extracted components so far, the pull-through cache and the backup bucket, are unreleased.

Who it is for

A team that runs its own clusters from a Pulumi program in Go and wants the cluster, its network and its supporting pieces as reusable components, rather than as a copy of another team's infrastructure repository. It assumes you already have a Pulumi backend, cloud credentials and a naming scheme; it chooses none of them.

It deliberately does not pick your names, your address ranges, your permission boundaries or your accounts, does not install workloads into the cluster (charts are a separate concern), and does not ship a Pod Security baseline yet (that will be its own chart).

The model

Three ideas.

A component is a Pulumi ComponentResource with a documented set of child resources. The child names are part of the API: a caller that adopts a component over existing infrastructure relies on them to keep its resources' URNs, through aliases the component declares.

A contract is what every provider component reports, in pkg/cluster.Outputs: name, endpoint, certificate authority, OIDC issuer and the capabilities the cluster offers (node pools, storage, network policy, workload identity, load balancing, API access). A consumer asks for a capability; it does not branch on the provider.

A caller-supplied name is any name, tag, range or boundary a component would otherwise have to choose. Components take them as inputs; none has a default that belongs to one estate.

Install and a worked example

go get github.com/truvity/k8s@v0.1.0

The contract is what a consumer of any provider writes against:

out := cluster.Outputs{
	Provider:                cluster.ProviderEKS,
	Name:                    "example",
	Endpoint:                "https://api.example.test",
	CertificateAuthorityPEM: caPEM,
	OIDCIssuer:              "https://oidc.example.test/id/abc",
	Capabilities:            cluster.NewCapabilities(cluster.NodePools, cluster.WorkloadIdentity),
}
if err := out.Validate(); err != nil {
	return err // the provider reported something a consumer cannot use
}
if out.Capabilities.Has(cluster.WorkloadIdentity) {
	// wire pod identities against out.OIDCIssuer
}

Consumers

The estate this is being extracted from will adopt it cluster by cluster, each adoption proven by an empty Pulumi preview (see docs/decisions/0002-urn-stability.md). No consumer is recorded at v0; a repository that adopts it adds a line here.

Neighbours

• pulumi-pipeline — runs many Pulumi stacks as one pipeline with refusal gates; the natural driver for programs that use these components.
• policy — the contracts this repository is held to (docs/contracts/component.md).
• ci-workflows — the shared CI and release workflows this repository calls.

Documentation

• docs/adoption.md — using a component, adopting one over existing infrastructure, and every breaking upgrade.
• docs/reference.md — the Go types and the capability set.
• docs/safety.md — what is refused and what must never be done to a cluster's resources.
• docs/doctrine.md — why it is shaped this way.
• docs/decisions/ — the decisions, one page each.
• SECURITY.md and CONTRIBUTING.md.

The rule that makes this repository public

Mechanism only. A cluster's name, its address ranges, its account, its permission boundaries and every tag pattern are the caller's: an input, a hook the caller supplies, or a file the caller commits. Nothing here defaults to one estate's value, and the tests never reach a real cloud — providers run against Pulumi mocks and cluster behaviour against kind. hack/leak-canary.sh enforces the mechanical half over tracked files and runs in the gate.

Status

v0: the API may still move in a minor release, and every move is a Breaking: bullet in the CHANGELOG. Today the module holds the contract only; providers are added by extraction from a running estate, each with its URN-stability proof.

Development

devbox shell        # pins every tool
just check          # build, test, lint, leak-canary
just vuln           # reachable Go advisories (its own workflow in CI, not in check)

Releasing

Releases are a v* tag, which the shared release workflow turns into the Go module version and a GitHub Release. Automatic patch releases are not armed; the first release and every minor and major are hand-cut tags.

Licence

MIT. See LICENSE.