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7b31f456c9
* Implement validationFailureActionByPolicy * Update README.md * Add artifacthub.io/changes entry * Add Test Case Signed-off-by: dschunack <dschunack@web.de>
61 lines
2.5 KiB
YAML
61 lines
2.5 KiB
YAML
{{- $name := "restrict-sysctls" }}
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{{- if eq (include "kyverno-policies.podSecurityBaseline" (merge (dict "name" $name) .)) "true" }}
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apiVersion: kyverno.io/v1
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kind: ClusterPolicy
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metadata:
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name: {{ $name }}
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annotations:
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policies.kyverno.io/title: Restrict sysctls
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policies.kyverno.io/category: Pod Security Standards (Baseline)
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{{- if .Values.podSecuritySeverity }}
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policies.kyverno.io/severity: {{ .Values.podSecuritySeverity }}
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{{- end }}
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policies.kyverno.io/subject: Pod
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kyverno.io/kyverno-version: 1.6.0
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kyverno.io/kubernetes-version: "1.22-1.23"
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policies.kyverno.io/description: >-
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Sysctls can disable security mechanisms or affect all containers on a
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host, and should be disallowed except for an allowed "safe" subset. A
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sysctl is considered safe if it is namespaced in the container or the
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Pod, and it is isolated from other Pods or processes on the same Node.
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This policy ensures that only those "safe" subsets can be specified in
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a Pod.
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spec:
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{{- with index .Values "validationFailureActionByPolicy" $name }}
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validationFailureAction: {{ toYaml . }}
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{{- else }}
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validationFailureAction: {{ .Values.validationFailureAction }}
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{{- end }}
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{{- with concat (index .Values "validationFailureActionOverrides" "all") (default list (index .Values "validationFailureActionOverrides" $name)) }}
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validationFailureActionOverrides: {{ toYaml . | nindent 4 }}
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{{- end }}
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background: {{ .Values.background }}
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failurePolicy: {{ .Values.failurePolicy }}
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rules:
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- name: check-sysctls
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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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{{- with index .Values "policyExclude" $name }}
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exclude:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with index .Values "policyPreconditions" $name }}
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preconditions:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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validate:
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message: >-
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Setting additional sysctls above the allowed type is disallowed.
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The field spec.securityContext.sysctls must be unset or not use any other names
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than kernel.shm_rmid_forced, net.ipv4.ip_local_port_range,
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net.ipv4.ip_unprivileged_port_start, net.ipv4.tcp_syncookies and
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net.ipv4.ping_group_range.
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pattern:
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spec:
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=(securityContext):
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=(sysctls):
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- =(name): "kernel.shm_rmid_forced | net.ipv4.ip_local_port_range | net.ipv4.ip_unprivileged_port_start | net.ipv4.tcp_syncookies | net.ipv4.ping_group_range"
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{{- end }}
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