Adds an addon for podSecurityPolicies
Signed-off-by: ArthurSens <arthursens2005@gmail.com>
This commit is contained in:
ArthurSens
23
examples/pod-security-policies.jsonnet
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23
examples/pod-security-policies.jsonnet
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@@ -0,0 +1,23 @@
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local kp =
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(import 'kube-prometheus/main.libsonnet') +
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(import 'kube-prometheus/addons/podsecuritypolicies.libsonnet');
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{ 'setup/0namespace-namespace': kp.kubePrometheus.namespace } +
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// Add the restricted psp to setup
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{ 'setup/0podsecuritypolicy-restricted': kp.restrictedPodSecurityPolicy } +
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{
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['setup/prometheus-operator-' + name]: kp.prometheusOperator[name]
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for name in std.filter((function(name) name != 'serviceMonitor' && name != 'prometheusRule'), std.objectFields(kp.prometheusOperator))
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} +
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// serviceMonitor and prometheusRule are separated so that they can be created after the CRDs are ready
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{ 'prometheus-operator-serviceMonitor': kp.prometheusOperator.serviceMonitor } +
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{ 'prometheus-operator-prometheusRule': kp.prometheusOperator.prometheusRule } +
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{ 'kube-prometheus-prometheusRule': kp.kubePrometheus.prometheusRule } +
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{ ['alertmanager-' + name]: kp.alertmanager[name] for name in std.objectFields(kp.alertmanager) } +
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{ ['blackbox-exporter-' + name]: kp.blackboxExporter[name] for name in std.objectFields(kp.blackboxExporter) } +
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{ ['grafana-' + name]: kp.grafana[name] for name in std.objectFields(kp.grafana) } +
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{ ['kube-state-metrics-' + name]: kp.kubeStateMetrics[name] for name in std.objectFields(kp.kubeStateMetrics) } +
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{ ['kubernetes-' + name]: kp.kubernetesControlPlane[name] for name in std.objectFields(kp.kubernetesControlPlane) }
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{ ['node-exporter-' + name]: kp.nodeExporter[name] for name in std.objectFields(kp.nodeExporter) } +
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{ ['prometheus-' + name]: kp.prometheus[name] for name in std.objectFields(kp.prometheus) } +
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{ ['prometheus-adapter-' + name]: kp.prometheusAdapter[name] for name in std.objectFields(kp.prometheusAdapter) }
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242
jsonnet/kube-prometheus/addons/podsecuritypolicies.libsonnet
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242
jsonnet/kube-prometheus/addons/podsecuritypolicies.libsonnet
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@@ -0,0 +1,242 @@
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local restrictedPodSecurityPolicy = {
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apiVersion: 'policy/v1beta1',
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kind: 'PodSecurityPolicy',
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metadata: {
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name: 'restricted',
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},
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spec: {
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privileged: false,
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// Required to prevent escalations to root.
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allowPrivilegeEscalation: false,
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// This is redundant with non-root + disallow privilege escalation,
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// but we can provide it for defense in depth.
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requiredDropCapabilities: ['ALL'],
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// Allow core volume types.
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volumes: [
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'configMap',
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'emptyDir',
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'secret',
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// Assume that persistentVolumes set up by the cluster admin are safe to use.
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'persistentVolumeClaim',
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],
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hostNetwork: false,
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hostIPC: false,
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hostPID: false,
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runAsUser: {
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// Require the container to run without root privileges.
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rule: 'MustRunAsNonRoot',
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},
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seLinux: {
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// This policy assumes the nodes are using AppArmor rather than SELinux.
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rule: 'RunAsAny',
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},
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supplementalGroups: {
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rule: 'MustRunAs',
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ranges: [{
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// Forbid adding the root group.
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min: 1,
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max: 65535,
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}],
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},
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fsGroup: {
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rule: 'MustRunAs',
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ranges: [{
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// Forbid adding the root group.
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min: 1,
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max: 65535,
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}],
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},
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readOnlyRootFilesystem: false,
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},
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};
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{
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restrictedPodSecurityPolicy: restrictedPodSecurityPolicy,
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alertmanager+: {
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role: {
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apiVersion: 'rbac.authorization.k8s.io/v1',
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kind: 'Role',
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metadata: {
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name: 'alertmanager-' + $.values.alertmanager.name,
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},
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rules: [{
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apiGroups: ['policy'],
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resources: ['podsecuritypolicies'],
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verbs: ['use'],
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resourceNames: [restrictedPodSecurityPolicy.metadata.name],
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}],
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},
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roleBinding: {
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apiVersion: 'rbac.authorization.k8s.io/v1',
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kind: 'RoleBinding',
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metadata: {
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name: 'alertmanager-' + $.values.alertmanager.name,
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},
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roleRef: {
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apiGroup: 'rbac.authorization.k8s.io',
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kind: 'Role',
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name: 'alertmanager-' + $.values.alertmanager.name,
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},
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subjects: [{
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kind: 'ServiceAccount',
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name: 'alertmanager-' + $.values.alertmanager.name,
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namespace: $.values.alertmanager.namespace,
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}],
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},
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},
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blackboxExporter+: {
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clusterRole+: {
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rules+: [
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{
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apiGroups: ['policy'],
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resources: ['podsecuritypolicies'],
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verbs: ['use'],
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resourceNames: ['blackbox-exporter-psp'],
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},
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],
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},
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podSecurityPolicy:
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local blackboxExporterPspPrivileged =
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if $.blackboxExporter.config.privileged then
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{
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metadata+: {
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name: 'blackbox-exporter-psp',
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},
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spec+: {
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privileged: true,
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allowedCapabilities: ['NET_RAW'],
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runAsUser: {
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rule: 'RunAsAny',
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},
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},
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}
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else
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{};
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restrictedPodSecurityPolicy + blackboxExporterPspPrivileged,
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},
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grafana+: {
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role: {
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apiVersion: 'rbac.authorization.k8s.io/v1',
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kind: 'Role',
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metadata: {
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name: 'grafana',
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},
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rules: [{
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apiGroups: ['policy'],
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resources: ['podsecuritypolicies'],
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verbs: ['use'],
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resourceNames: [restrictedPodSecurityPolicy.metadata.name],
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}],
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},
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roleBinding: {
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apiVersion: 'rbac.authorization.k8s.io/v1',
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kind: 'RoleBinding',
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metadata: {
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name: 'grafana',
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},
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roleRef: {
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apiGroup: 'rbac.authorization.k8s.io',
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kind: 'Role',
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name: 'grafana',
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},
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subjects: [{
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kind: 'ServiceAccount',
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name: $.grafana.serviceAccount.metadata.name,
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namespace: $.grafana.serviceAccount.metadata.namespace,
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}],
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},
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},
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kubeStateMetrics+: {
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clusterRole+: {
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rules+: [{
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apiGroups: ['policy'],
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resources: ['podsecuritypolicies'],
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verbs: ['use'],
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resourceNames: [restrictedPodSecurityPolicy.metadata.name],
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}],
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},
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},
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nodeExporter+: {
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clusterRole+: {
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rules+: [{
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apiGroups: ['policy'],
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resources: ['podsecuritypolicies'],
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verbs: ['use'],
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resourceNames: ['node-exporter-psp'],
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}],
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},
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podSecurityPolicy: restrictedPodSecurityPolicy {
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metadata+: {
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name: 'node-exporter-psp',
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},
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spec+: {
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allowedHostPaths+: [
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{
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pathPrefix: '/proc',
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readOnly: true,
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},
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{
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pathPrefix: '/sys',
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readOnly: true,
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},
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{
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pathPrefix: '/',
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readOnly: true,
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},
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],
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hostNetwork: true,
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hostPID: true,
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hostPorts: [
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{
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max: 9100,
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min: 9100,
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},
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],
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readOnlyRootFilesystem: true,
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},
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},
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},
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prometheusAdapter+: {
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clusterRole+: {
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rules+: [{
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apiGroups: ['policy'],
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resources: ['podsecuritypolicies'],
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verbs: ['use'],
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resourceNames: [restrictedPodSecurityPolicy.metadata.name],
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}],
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},
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},
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prometheusOperator+: {
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clusterRole+: {
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rules+: [{
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apiGroups: ['policy'],
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resources: ['podsecuritypolicies'],
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verbs: ['use'],
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resourceNames: [restrictedPodSecurityPolicy.metadata.name],
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}],
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},
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},
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prometheus+: {
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clusterRole+: {
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rules+: [{
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apiGroups: ['policy'],
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resources: ['podsecuritypolicies'],
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verbs: ['use'],
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resourceNames: [restrictedPodSecurityPolicy.metadata.name],
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}],
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},
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},
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}
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