2.5.10. 集成 gatekeeper 约束和约束模板

ConstraintTemplates 和约束： 使用 policy-gatekeeper-k8srequiredlabels 策略在受管集群上创建 gatekeeper 约束模板。

apiVersion: policy.open-cluster-management.io/v1
kind: ConfigurationPolicy
metadata:
  name: policy-gatekeeper-k8srequiredlabels
spec:
  remediationAction: enforce # will be overridden by remediationAction in parent policy
  severity: low
  object-templates:
    - complianceType: musthave
      objectDefinition:
        apiVersion: templates.gatekeeper.sh/v1beta1
        kind: ConstraintTemplate
        metadata:
          name: k8srequiredlabels
        spec:
          crd:
            spec:
              names:
                kind: K8sRequiredLabels
              validation:
                # Schema for the `parameters` field
                openAPIV3Schema:
                  properties:
                    labels:
                      type: array
                      items: string
          targets:
            - target: admission.k8s.gatekeeper.sh
              rego: |
                package k8srequiredlabels
                violation[{"msg": msg, "details": {"missing_labels": missing}}] {
                  provided := {label | input.review.object.metadata.labels[label]}
                  required := {label | label := input.parameters.labels[_]}
                  missing := required - provided
                  count(missing) > 0
                  msg := sprintf("you must provide labels: %v", [missing])
                }
    - complianceType: musthave
      objectDefinition:
        apiVersion: constraints.gatekeeper.sh/v1beta1
        kind: K8sRequiredLabels
        metadata:
          name: ns-must-have-gk
        spec:
          match:
            kinds:
              - apiGroups: [""]
                kinds: ["Namespace"]
            namespaces:
              - e2etestsuccess
              - e2etestfail
          parameters:
            labels: ["gatekeeper"]

审计模板： 使用 policy-gatekeeper-audit 定期检查并评估为检测出错误协调而强制执行的门管理器策略的现有资源。

apiVersion: policy.open-cluster-management.io/v1
kind: ConfigurationPolicy
metadata:
  name: policy-gatekeeper-audit
spec:
  remediationAction: inform # will be overridden by remediationAction in parent policy
  severity: low
  object-templates:
    - complianceType: musthave
      objectDefinition:
        apiVersion: constraints.gatekeeper.sh/v1beta1
        kind: K8sRequiredLabels
        metadata:
          name: ns-must-have-gk
        status:
          totalViolations: 0

Admission 模板： 使用 policy-gatekeeper-admission 检查由 gatekeeper admission webhook 创建的错误配置：

apiVersion: policy.open-cluster-management.io/v1
kind: ConfigurationPolicy
metadata:
  name: policy-gatekeeper-admission
spec:
  remediationAction: inform # will be overridden by remediationAction in parent policy
  severity: low
  object-templates:
    - complianceType: mustnothave
      objectDefinition:
        apiVersion: v1
        kind: Event
        metadata:
          namespace: openshift-gatekeeper-system # set it to the actual namespace where gatekeeper is running if different
          annotations:
            constraint_action: deny
            constraint_kind: K8sRequiredLabels
            constraint_name: ns-must-have-gk
            event_type: violation