marko/cnpg-postgres-containers
1
0
Fork 0
forked from repo-mirrors/cnpg-postgres-containers
Code Pull Requests Actions Activity

feat: add cosign to sign the images (#137)

Browse Source 
Using the output from the bake action, we sign every 
container image tag plus each specific digest using cosign.

Closes #136

Signed-off-by: Francesco Canovai <francesco.canovai@enterprisedb.com>
Signed-off-by: Jonathan Gonzalez V <jonathan.gonzalez@enterprisedb.com>
Signed-off-by: Gabriele Bartolini <gabriele.bartolini@enterprisedb.com>
Co-authored-by: Francesco Canovai <francesco.canovai@enterprisedb.com>
Co-authored-by: Gabriele Bartolini <gabriele.bartolini@enterprisedb.com>
This commit is contained in:
Jonathan Gonzalez V.
2025-01-22 15:02:22 +01:00
committed by GitHub
parent 588f8dc7f8
commit 980c2fabc8
3 changed files with 61 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
README.md
View File

@@ -118,6 +118,29 @@ docker buildx imagetools inspect <IMAGE> --format "{{ json .SBOM.SPDX }}"
This command outputs the SBOM in JSON format, providing a detailed view of the
software components and build dependencies.
## Image Signatures
CloudNativePG container images are securely signed using
[cosign](https://github.com/sigstore/cosign), a tool within the
[Sigstore](https://www.sigstore.dev/) ecosystem.
This signing process is automated via GitHub Actions and leverages
[short-lived tokens issued through OpenID Connect](https://docs.github.com/en/actions/security-for-github-actions/security-hardening-your-deployments/about-security-hardening-with-openid-connect).
The token issuer is `https://token.actions.githubusercontent.com`, and the
signing identity corresponds to a GitHub workflow executed under the
`cloudnative-pg/postgres-containers` repository. This workflow uses the
[`cosign-installer` action](https://github.com/marketplace/actions/cosign-installer)
to facilitate the signing process.
To verify the authenticity of an image using its digest, you can run the
following `cosign` command:
```sh
cosign verify IMAGE \
--certificate-identity-regexp="^https://github.com/cloudnative-pg/postgres-containers/" \
--certificate-oidc-issuer="https://token.actions.githubusercontent.com"
```
## Building Images
For detailed instructions on building PostgreSQL container images, refer to the