Switch to OIDC Federation Service instead of GitHub App#775
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Switch to OIDC Federation Service instead of GitHub App#775
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Currently, the [Gardener GitHub-Actions App](https://github.com/apps/gardener-github-actions) is used to provide more privileged access than available via the default `GITHUB_TOKEN`, for example to circumvent branch protection rules (GitHub Apps can be configured as bypassers) or cross repository privileges. To prevent sharing the GitHub App secret with each and every repository/workflow which requires usage of it, the [GitHub OIDC Federation Service](https://github.com/gardener/github-oidc-federation) has been developed. In essence, it holds the credentials for a central GitHub App and creates short-lived access tokens with a configured scope based on a centrally configured OIDC configuration. See related changes which have been necessary for this repository: - gardener/.github-oidc@6bedc95 Signed-off-by: Jonas Brand (i538859) <j.brand@sap.com>
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What this PR does / why we need it:
Currently, the Gardener GitHub-Actions App is used to provide more privileged access than available via the default
GITHUB_TOKEN, for example to circumvent branch protection rules (GitHub Apps can be configured as bypassers) or cross repository privileges. To prevent sharing the GitHub App secret with each and every repository/workflow which requires usage of it, the GitHub OIDC Federation Service has been developed. In essence, it holds the credentials for a central GitHub App and creates short-lived access tokens with a configured scope based on a centrally configured OIDC configuration. See related changes which have been necessary for this repository:Release note: