mirror of
https://gitlab.kube.huskypup.net/Scooby/Homelabv4.git
synced 2026-08-21 05:26:49 +00:00
108 lines
4.1 KiB
YAML
108 lines
4.1 KiB
YAML
apiVersion: kyverno.io/v1
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kind: ClusterPolicy
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metadata:
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name: restrict-image-registries
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annotations:
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policies.kyverno.io/title: Restrict Image Registries
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policies.kyverno.io/category: Zero Trust
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policies.kyverno.io/severity: high
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policies.kyverno.io/description: >-
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Validates that all container images come from allowed registries.
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Images must either use an explicit allowed registry prefix (docker.io/,
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ghcr.io/, quay.io/, etc.) or be short-name Docker Hub references
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(no dots before the first slash, e.g. grafana/grafana or busybox).
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spec:
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validationFailureAction: Enforce
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background: true
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rules:
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- name: validate-container-registries
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match:
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any:
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- resources:
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kinds:
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- Pod
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exclude:
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any:
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- resources:
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namespaces:
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- kube-system
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- kube-node-lease
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- kyverno
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validate:
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message: >-
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Images must come from allowed registries: docker.io, ghcr.io, quay.io,
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registry.k8s.io, gcr.io, lscr.io, registry.gitlab.com, cr.fluentbit.io,
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public.ecr.aws, ecr-public.aws.com, oci.external-secrets.io,
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docker-registry3.mariadb.com. Docker Hub short names (org/image or
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library images) are also allowed.
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foreach:
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- list: "request.object.spec.containers"
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deny:
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conditions:
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all:
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# Image does NOT start with any allowed registry prefix
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- key: "{{element.image}}"
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operator: AnyNotIn
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value:
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- "docker.io/*"
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- "ghcr.io/*"
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- "quay.io/*"
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- "registry.k8s.io/*"
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- "gcr.io/*"
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- "lscr.io/*"
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- "registry.gitlab.com/*"
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- "cr.fluentbit.io/*"
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- "public.ecr.aws/*"
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- "ecr-public.aws.com/*"
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- "oci.external-secrets.io/*"
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- "docker-registry3.mariadb.com/*"
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# AND image looks like a registry hostname (has a dot before the first slash)
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# This allows Docker Hub short names like grafana/grafana or busybox
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- key: "{{element.image}}"
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operator: Equals
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value: "*.*/*"
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- list: "request.object.spec.initContainers || []"
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deny:
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conditions:
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all:
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- key: "{{element.image}}"
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operator: AnyNotIn
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value:
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- "docker.io/*"
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- "ghcr.io/*"
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- "quay.io/*"
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- "registry.k8s.io/*"
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- "gcr.io/*"
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- "lscr.io/*"
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- "registry.gitlab.com/*"
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- "cr.fluentbit.io/*"
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- "public.ecr.aws/*"
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- "ecr-public.aws.com/*"
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- "oci.external-secrets.io/*"
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- "docker-registry3.mariadb.com/*"
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- key: "{{element.image}}"
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operator: Equals
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value: "*.*/*"
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- list: "request.object.spec.ephemeralContainers || []"
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deny:
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conditions:
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all:
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- key: "{{element.image}}"
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operator: AnyNotIn
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value:
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- "docker.io/*"
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- "ghcr.io/*"
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- "quay.io/*"
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- "registry.k8s.io/*"
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- "gcr.io/*"
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- "lscr.io/*"
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- "registry.gitlab.com/*"
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- "cr.fluentbit.io/*"
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- "public.ecr.aws/*"
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- "ecr-public.aws.com/*"
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- "oci.external-secrets.io/*"
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- "docker-registry3.mariadb.com/*"
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- key: "{{element.image}}"
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operator: Equals
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value: "*.*/*"
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