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Policy Rule
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{
"properties": {
"displayName": "[Preview]: Kubernetes cluster pods should only use approved host network and port range",
"policyType": "BuiltIn",
"mode": "Microsoft.Kubernetes.Data",
"description": "This policy controls pod access to the host network and the allowable host port range in a Kubernetes cluster. For instructions on using this policy, visit https://aka.ms/kubepolicydoc.",
"metadata": {
"version": "1.0.0-preview",
"category": "Kubernetes",
"preview": true
},
"parameters": {
"effect": {
"type": "String",
"metadata": {
"displayName": "[Preview]: Effect",
"description": "'Audit' allows a non-compliant resource to be created or updated, but flags it as non-compliant. 'Deny' blocks the non-compliant resource creation or update. 'Disabled' turns off the policy."
},
"allowedValues": [
"audit",
"deny",
"disabled"
],
"defaultValue": "audit"
},
"excludedNamespaces": {
"type": "Array",
"metadata": {
"displayName": "[Preview]: Namespace exclusions",
"description": "List of Kubernetes namespaces to exclude from policy evaluation."
},
"defaultValue": [
"kube-system",
"gatekeeper-system",
"azure-arc"
]
},
"allowHostNetwork": {
"type": "Boolean",
"metadata": {
"displayName": "[Preview]: Allow host network usage",
"description": "Set this value to true if pod is allowed to use host network otherwise false."
},
"defaultValue": false
},
"minPort": {
"type": "Integer",
"metadata": {
"displayName": "[Preview]: Min host port",
"description": "The minimum value in the allowable host port range that pods can use in the host network namespace."
},
"defaultValue": 0
},
"maxPort": {
"type": "Integer",
"metadata": {
"displayName": "[Preview]: Max host port",
"description": "The maximum value in the allowable host port range that pods can use in the host network namespace."
},
"defaultValue": 0
}
},
"policyRule": {
"if": {
"field": "type",
"in": [
"AKS Engine",
"Microsoft.Kubernetes/connectedClusters",
"Microsoft.ContainerService/managedClusters"
]
},
"then": {
"effect": "[parameters('effect')]",
"details": {
"constraintTemplate": "https://raw.githubusercontent.com/Azure/azure-policy/master/built-in-references/Kubernetes/host-network-ports/template.yaml",
"constraint": "https://raw.githubusercontent.com/Azure/azure-policy/master/built-in-references/Kubernetes/host-network-ports/constraint.yaml",
"values": {
"allowHostNetwork": "[parameters('allowHostNetwork')]",
"minPort": "[parameters('minPort')]",
"maxPort": "[parameters('maxPort')]",
"excludedNamespaces": "[parameters('excludedNamespaces')]"
}
}
}
}
},
"id": "/providers/Microsoft.Authorization/policyDefinitions/82985f06-dc18-4a48-bc1c-b9f4f0098cfe",
"type": "Microsoft.Authorization/policyDefinitions",
"name": "82985f06-dc18-4a48-bc1c-b9f4f0098cfe"
}
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