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Bug
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Resolution: Unresolved
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Undefined
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None
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4.17
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None
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Moderate
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None
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OCPNODE Sprint 256 (Blue)
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1
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False
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Bug Fix
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In Progress
Description of problem
As rhn-engineering-mitr reported upstream, when a ClusterImagePolicy is set on a scope to accept sigstore signatures, the underlying registry needs to be configured with use-sigstore-attachments: true. The current code:
func generateSigstoreRegistriesdConfig(clusterScopePolicies map[string]signature.PolicyRequirements) ([]byte, error) {
does do that for the configured scope; but the use-sigstore-attachments option applies not to the "logical name", but to each underlying mirror individually.
I.e. the option needs to be on every mirror of the scope. Without that, if the image is found on one of such mirrors, the c/image code will not be looking for signatures on the mirror, and policy enforcement is likely to fail.
Version-Release number of selected component
Seen in 4.17.0-0.nightly-2024-06-25-162526, but likely all releases which implement ClusterImagePolicy so far, because this is unlikely to be a regression.
How reproducible
Every time.
Steps to Reproduce
Apply the ClusterImagePolicy suggested in OTA-1294's enhancements#1633:
$ cat <<EOF >policy.yaml
apiVersion: config.openshift.io/v1alpha1
kind: ClusterImagePolicy
metadata:
name: openshift
annotations:
kubernetes.io/description: Require Red Hat signatures for quay.io/openshift-release-dev/ocp-release container images.
exclude.release.openshift.io/internal-openshift-hosted: "true"
include.release.openshift.io/self-managed-high-availability: "true"
release.openshift.io/feature-set: TechPreviewNoUpgrade
spec:
scopes:
- quay.io/openshift-release-dev/ocp-release
policy:
rootOfTrust:
policyType: PublicKey
publicKey:
keyData: 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
EOF
$ oc apply -f policy.yaml
Set up an ImageContentSourcePolicy such as the ones Cluster Bot jobs have by default:
cat <<EOF >mirror.yaml
apiVersion: operator.openshift.io/v1alpha1
kind: ImageContentSourcePolicy
metadata:
name: pull-through-mirror
spec:
repositoryDigestMirrors:
- mirrors:
- quayio-pull-through-cache-us-west-2-ci.apps.ci.l2s4.p1.openshiftapps.com
source: quay.io
EOF
$ oc apply -f mirror.yaml
Set CRI-O debug logs, following these docs:
$ cat <<EOF >custom-loglevel.yaml
apiVersion: machineconfiguration.openshift.io/v1
kind: ContainerRuntimeConfig
metadata:
name: custom-loglevel
spec:
machineConfigPoolSelector:
matchLabels:
pools.operator.machineconfiguration.openshift.io/master: ''
containerRuntimeConfig:
logLevel: debug
EOF
$ oc create -f custom-loglevel.yaml
Wait for that to roll out, as described in docs:
$ oc get machineconfigpool master
Launch a Sigstore-signed quay.io/openshift-release-dev/ocp-release image, by asking the cluster to update to 4.16.1:
$ oc adm upgrade --allow-explicit-upgrade --to-image quay.io/openshift-release-dev/ocp-release@sha256:c17d4489c1b283ee71c76dda559e66a546e16b208a57eb156ef38fb30098903a
Check the debug CRI-O logs:
$ oc adm node-logs --role=master -u crio | grep -i1 sigstore | tail -n5
Actual results
Not looking for sigstore attachments: disabled by configuration entries like:
$ oc adm node-logs --role=master -u crio' | grep -i1 sigstore | tail -n5 -- Jun 28 19:06:34.317335 ip-10-0-43-59 crio[2154]: time="2024-06-28 19:06:34.317169116Z" level=debug msg=" Using transport \"docker\" specific policy section quay.io/openshift-release-dev/ocp-release" file="signature/policy_eval.go:150" Jun 28 19:06:34.317335 ip-10-0-43-59 crio[2154]: time="2024-06-28 19:06:34.317207897Z" level=debug msg="Reading /var/lib/containers/sigstore/openshift-release-dev/ocp-release@sha256=c17d4489c1b283ee71c76dda559e66a546e16b208a57eb156ef38fb30098903a/signature-1" file="docker/docker_image_src.go:479" Jun 28 19:06:34.317335 ip-10-0-43-59 crio[2154]: time="2024-06-28 19:06:34.317240227Z" level=debug msg="Not looking for sigstore attachments: disabled by configuration" file="docker/docker_image_src.go:556" Jun 28 19:06:34.317335 ip-10-0-43-59 crio[2154]: time="2024-06-28 19:06:34.317277208Z" level=debug msg="Requirement 0: denied, done" file="signature/policy_eval.go:285"
Expected results
Something about "we're going to look for Sigstore signatures on quayio-pull-through-cache-us-west-2-ci.apps.ci.l2s4.p1.openshiftapps.com, since that's where we found the quay.io/openshift-release-dev/ocp-release@sha256:c17d4489c1b283ee71c76dda559e66a546e16b208a57eb156ef38fb30098903a image". At this point, it doesn't matter whether the retrieved signature is accepted or not, just that a signature lookup is attempted.
- blocks
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OTA-1304 Cluster-update-keys should grow a manifest for ClusterImagePolicy
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- Closed
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- links to
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RHEA-2024:3718
OpenShift Container Platform 4.17.z bug fix update