last sync: 2020-Aug-05 13:05:29 UTC

Azure Policy

[Preview]: Kubernetes cluster pods should only use approved host network and port range

Policy DisplayName [Preview]: Kubernetes cluster pods should only use approved host network and port range
Policy Id 82985f06-dc18-4a48-bc1c-b9f4f0098cfe
Policy Category Kubernetes
Policy 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.
Policy Mode Microsoft.Kubernetes.Data
Policy Type BuiltIn
Policy in Preview True
Policy Deprecated FALSE
Policy Effect Default: audit
Allowed: (audit,deny,disabled)
Roles used none
Policy Changes
Date/Time (UTC ymd) (i) Change Change detail
2020-07-08 14:28:08 add: Policy 82985f06-dc18-4a48-bc1c-b9f4f0098cfe
Used in Policy Initiative(s)
Initiative DisplayName Initiative Id
[Preview]: Kubernetes cluster pod security restricted standards for Linux-based workloads 42b8ef37-b724-4e24-bbc8-7a7708edfe00
[Preview]: Kubernetes cluster pod security baseline standards for Linux-based workloads a8640138-9b0a-4a28-b8cb-1666c838647d
Policy Rule
{
  "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"
}