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📖 document verification steps for capi images
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# Verification of CAPI artifacts | ||
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## Requirements | ||
You will need to have the following tools installed: | ||
- cosign [(install guide)](https://docs.sigstore.dev/system_config/installation/) | ||
- jq [(download jq)](https://stedolan.github.io/jq/download/) | ||
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## CAPI Images | ||
Each [release](https://github.com/kubernetes-sigs/cluster-api/releases) of the Cluster API project includes the following container images: | ||
- cluster-api-controller | ||
- kubeadm-bootstrap-controller | ||
- kubeadm-control-plane-controller | ||
- clusterctl | ||
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## Verifying Image Signatures | ||
All of the four images are hosted by [registry.k8s.io](https://registry.k8s.io). In order to verify the authenticity of the images, you can use `cosign verify` command with the appropriate image name and version: | ||
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```bash | ||
$ cosign verify registry.k8s.io/cluster-api/cluster-api-controller:v1.5.0 --certificate-identity krel-trust@k8s-releng-prod.iam.gserviceaccount.com --certificate-oidc-issuer https://accounts.google.com | jq . | ||
``` | ||
```text | ||
Verification for registry.k8s.io/cluster-api/cluster-api-controller:v1.5.0 -- | ||
The following checks were performed on each of these signatures: | ||
- The cosign claims were validated | ||
- Existence of the claims in the transparency log was verified offline | ||
- The code-signing certificate was verified using trusted certificate authority certificates | ||
[ | ||
{ | ||
"critical": { | ||
"identity": { | ||
"docker-reference": "registry.k8s.io/cluster-api/cluster-api-controller" | ||
}, | ||
"image": { | ||
"docker-manifest-digest": "sha256:f34016d3a494f9544a16137c9bba49d8756c574a0a1baf96257903409ef82f77" | ||
}, | ||
"type": "cosign container image signature" | ||
}, | ||
"optional": { | ||
"1.3.6.1.4.1.57264.1.1": "https://accounts.google.com", | ||
"Bundle": { | ||
"SignedEntryTimestamp": "MEYCIQDtxr/v3uRl2QByVfYo1oopruADSaH3E4wThpmkibJs8gIhAIe0odbk99na5GBdYGjJ6IwpFzhlTlicgWOrsgxZH8LC", | ||
"Payload": { | ||
"body": "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", | ||
"integratedTime": 1690304684, | ||
"logIndex": 28719030, | ||
"logID": "c0d23d6ad406973f9559f3ba2d1ca01f84147d8ffc5b8445c224f98b9591801d" | ||
} | ||
}, | ||
"Issuer": "https://accounts.google.com", | ||
"Subject": "krel-trust@k8s-releng-prod.iam.gserviceaccount.com", | ||
"org.kubernetes.kpromo.version": "kpromo-v4.0.3-5-ge99897c" | ||
} | ||
} | ||
] | ||
``` |