Sergiusz Bazanski | b13b7ff | 2019-08-29 20:12:24 +0200 | [diff] [blame^] | 1 | local kube = import "kube.libsonnet"; |
| 2 | |
| 3 | { |
| 4 | local policies = self, |
| 5 | |
| 6 | policyNameAllowInsecure: "policy:allow-insecure", |
| 7 | policyNameAllowSecure: "policy:allow-secure", |
| 8 | |
| 9 | Cluster: { |
| 10 | insecure: kube._Object("policy/v1beta1", "PodSecurityPolicy", "insecure") { |
| 11 | spec: { |
| 12 | privileged: true, |
| 13 | allowPrivilegeEscalation: true, |
| 14 | allowedCapabilities: ['*'], |
| 15 | volumes: ['*'], |
| 16 | hostNetwork: true, |
| 17 | hostIPC: true, |
| 18 | hostPID: true, |
| 19 | runAsUser: { |
| 20 | rule: 'RunAsAny', |
| 21 | }, |
| 22 | seLinux: { |
| 23 | rule: 'RunAsAny', |
| 24 | }, |
| 25 | supplementalGroups: { |
| 26 | rule: 'RunAsAny', |
| 27 | }, |
| 28 | fsGroup: { |
| 29 | rule: 'RunAsAny', |
| 30 | }, |
| 31 | }, |
| 32 | }, |
| 33 | insecureRole: kube.ClusterRole(policies.policyNameAllowInsecure) { |
| 34 | rules: [ |
| 35 | { |
| 36 | apiGroups: ['policy'], |
| 37 | resources: ['podsecuritypolicies'], |
| 38 | verbs: ['use'], |
| 39 | resourceNames: ['insecure'], |
| 40 | } |
| 41 | ], |
| 42 | }, |
| 43 | secure: kube._Object("policy/v1beta1", "PodSecurityPolicy", "secure") { |
| 44 | spec: { |
| 45 | privileged: false, |
| 46 | # Required to prevent escalations to root. |
| 47 | allowPrivilegeEscalation: false, |
| 48 | # This is redundant with non-root + disallow privilege escalation, |
| 49 | # but we can provide it for defense in depth. |
| 50 | requiredDropCapabilities: ["ALL"], |
| 51 | # Allow core volume types. |
| 52 | volumes: [ |
| 53 | 'configMap', |
| 54 | 'emptyDir', |
| 55 | 'projected', |
| 56 | 'secret', |
| 57 | 'downwardAPI', |
| 58 | 'persistentVolumeClaim', |
| 59 | ], |
| 60 | hostNetwork: false, |
| 61 | hostIPC: false, |
| 62 | hostPID: false, |
| 63 | runAsUser: { |
| 64 | # Allow to run as root - docker, we trust you here. |
| 65 | rule: 'RunAsAny', |
| 66 | }, |
| 67 | seLinux: { |
| 68 | rule: 'RunAsAny', |
| 69 | }, |
| 70 | supplementalGroups: { |
| 71 | rule: 'MustRunAs', |
| 72 | ranges: [ |
| 73 | { |
| 74 | # Forbid adding the root group. |
| 75 | min: 1, |
| 76 | max: 65535, |
| 77 | } |
| 78 | ], |
| 79 | }, |
| 80 | fsGroup: { |
| 81 | rule: 'MustRunAs', |
| 82 | ranges: [ |
| 83 | { |
| 84 | # Forbid adding the root group. |
| 85 | min: 1, |
| 86 | max: 65535, |
| 87 | } |
| 88 | ], |
| 89 | }, |
| 90 | readOnlyRootFilesystem: false, |
| 91 | }, |
| 92 | }, |
| 93 | secureRole: kube.ClusterRole(policies.policyNameAllowSecure) { |
| 94 | rules: [ |
| 95 | { |
| 96 | apiGroups: ['policy'], |
| 97 | resources: ['podsecuritypolicies'], |
| 98 | verbs: ['use'], |
| 99 | resourceNames: ['secure'], |
| 100 | }, |
| 101 | ], |
| 102 | }, |
| 103 | }, |
| 104 | |
| 105 | # Allow insecure access to all service accounts in a given namespace. |
| 106 | AllowNamespaceInsecure(namespace): { |
| 107 | rb: kube.RoleBinding("policy:allow-insecure-in-" + namespace) { |
| 108 | metadata+: { |
| 109 | namespace: namespace, |
| 110 | }, |
| 111 | roleRef_: policies.Cluster.insecureRole, |
| 112 | subjects: [ |
| 113 | { |
| 114 | kind: "Group", |
| 115 | apiGroup: "rbac.authorization.k8s.io", |
| 116 | name: "system:serviceaccounts", |
| 117 | } |
| 118 | ], |
| 119 | }, |
| 120 | }, |
| 121 | } |