Identify Containers needing mirroring

Run:

helm template spire --repo https://spiffe.github.io/helm-charts-hardened/ -f your-values.yaml | yq e -rN \
 '[.spec, .spec.template.spec] | flatten(1) | .[]| [.containers, .initContainers] | flatten(1) | .[].image' - \
 | sort -u

Example output:

cgr.dev/chainguard/bash:latest
cgr.dev/chainguard/kubectl:latest
cgr.dev/chainguard/wait-for-it:latest-20230113
ghcr.io/spiffe/spiffe-csi-driver:0.2.3
ghcr.io/spiffe/spire-agent:1.6.3
ghcr.io/spiffe/spire-controller-manager:0.2.2
ghcr.io/spiffe/spire-server:1.6.3
registry.k8s.io/sig-storage/csi-node-driver-registrar:v2.6.2

Mirror Containers

Copy each container to your local repository, replacing the server name but keeping the paths.

This is easiest to do with skopeo or crane, but can be done with docker as well.

Mirror the Charts to the Registry

Pull down SPIRE charts

helm pull spire-crds --repo https://spiffe.github.io/helm-charts-hardened/
helm pull spire --repo https://spiffe.github.io/helm-charts-hardened/

Push up charts to registry

helm push spire-crds*.tgz oci://<your registry url>/helm-charts-hardened/spire-crds
helm push spire-0*.tgz oci://<your registry url>/helm-charts-hardened/spire

Configuration

Update the repo values to point at your local mirror:

your-values.yaml snippet:

global:
  spire:
    image:
      registry: "<your registry url here>"

Installation

Install using the mirrored charts:

helm upgrade --install --create-namespace -n spire-mgmt spire-crds \
  oci://<your registry url>/helm-charts/spire-crds

helm upgrade --install -n spire-mgmt spire spire \
 --repo https://spiffe.github.io/helm-charts-hardened/ \
 -f your-values.yaml