3.4. OpenShift Dedicated 验证 Webhook
OpenShift Dedicated 验证 Webhook 是由 OpenShift SRE 团队维护的一组动态准入控制。对于各种类型的请求，这些 HTTP 回调也称为 Webhook，以确保集群稳定性。以下列表描述了各种带有控制注册的操作和资源的规则的 Webhook。任何尝试绕过这些验证 Webhook 都可能会影响集群的稳定性和可支持性。
例 3.3. 验证 Webhook 列表
[
{
"webhookName": "clusterlogging-validation",
"rules": [
{
"operations": [
"CREATE",
"UPDATE"
],
"apiGroups": [
"logging.openshift.io"
],
"apiVersions": [
"v1"
],
"resources": [
"clusterloggings"
],
"scope": "Namespaced"
}
],
"documentString": "Managed OpenShift Customers may set log retention outside the allowed range of 0-7 days"
},
{
"webhookName": "hiveownership-validation",
"rules": [
{
"operations": [
"UPDATE",
"DELETE"
],
"apiGroups": [
"quota.openshift.io"
],
"apiVersions": [
"*"
],
"resources": [
"clusterresourcequotas"
],
"scope": "Cluster"
}
],
"webhookObjectSelector": {
"matchLabels": {
"hive.openshift.io/managed": "true"
}
},
"documentString": "Managed OpenShift customers may not edit certain managed resources. A managed resource has a \"hive.openshift.io/managed\": \"true\" label."
},
{
"webhookName": "namespace-validation",
"rules": [
{
"operations": [
"CREATE",
"UPDATE",
"DELETE"
],
"apiGroups": [
""
],
"apiVersions": [
"*"
],
"resources": [
"namespaces"
],
"scope": "Cluster"
}
],
"documentString": "Managed OpenShift Customers may not modify namespaces specified in the [openshift-monitoring/addons-namespaces openshift-monitoring/managed-namespaces openshift-monitoring/ocp-namespaces] ConfigMaps because customer workloads should be placed in customer-created namespaces. Customers may not create namespaces identified by this regular expression (^com$|^io$|^in$) because it could interfere with critical DNS resolution. Additionally, customers may not set or change the values of these Namespace labels [managed.openshift.io/storage-pv-quota-exempt managed.openshift.io/service-lb-quota-exempt]."
},
{
"webhookName": "pod-validation",
"rules": [
{
"operations": [
"*"
],
"apiGroups": [
"v1"
],
"apiVersions": [
"*"
],
"resources": [
"pods"
],
"scope": "Namespaced"
}
],
"documentString": "Managed OpenShift Customers may use tolerations on Pods that could cause those Pods to be scheduled on infra or master nodes."
},
{
"webhookName": "regular-user-validation",
"rules": [
{
"operations": [
"*"
],
"apiGroups": [
"cloudcredential.openshift.io",
"machine.openshift.io",
"admissionregistration.k8s.io",
"addons.managed.openshift.io",
"cloudingress.managed.openshift.io",
"managed.openshift.io",
"ocmagent.managed.openshift.io",
"splunkforwarder.managed.openshift.io",
"upgrade.managed.openshift.io"
],
"apiVersions": [
"*"
],
"resources": [
"*/*"
],
"scope": "*"
},
{
"operations": [
"*"
],
"apiGroups": [
"autoscaling.openshift.io"
],
"apiVersions": [
"*"
],
"resources": [
"clusterautoscalers",
"machineautoscalers"
],
"scope": "*"
},
{
"operations": [
"*"
],
"apiGroups": [
"config.openshift.io"
],
"apiVersions": [
"*"
],
"resources": [
"clusterversions",
"clusterversions/status",
"schedulers",
"apiservers"
],
"scope": "*"
},
{
"operations": [
"*"
],
"apiGroups": [
"operator.openshift.io"
],
"apiVersions": [
"*"
],
"resources": [
"kubeapiservers",
"openshiftapiservers"
],
"scope": "*"
},
{
"operations": [
"*"
],
"apiGroups": [
""
],
"apiVersions": [
"*"
],
"resources": [
"nodes",
"nodes/*"
],
"scope": "*"
},
{
"operations": [
"*"
],
"apiGroups": [
"managed.openshift.io"
],
"apiVersions": [
"*"
],
"resources": [
"subjectpermissions",
"subjectpermissions/*"
],
"scope": "*"
},
{
"operations": [
"*"
],
"apiGroups": [
"network.openshift.io"
],
"apiVersions": [
"*"
],
"resources": [
"netnamespaces",
"netnamespaces/*"
],
"scope": "*"
}
],
"documentString": "Managed OpenShift customers may not manage any objects in the following APIgroups [network.openshift.io cloudcredential.openshift.io managed.openshift.io ocmagent.managed.openshift.io upgrade.managed.openshift.io config.openshift.io operator.openshift.io machine.openshift.io admissionregistration.k8s.io addons.managed.openshift.io cloudingress.managed.openshift.io splunkforwarder.managed.openshift.io autoscaling.openshift.io], nor may Managed OpenShift customers alter the APIServer, KubeAPIServer, OpenShiftAPIServer, ClusterVersion, Node or SubjectPermission objects."
},
{
"webhookName": "scc-validation",
"rules": [
{
"operations": [
"UPDATE",
"DELETE"
],
"apiGroups": [
"security.openshift.io"
],
"apiVersions": [
"*"
],
"resources": [
"securitycontextconstraints"
],
"scope": "Cluster"
}
],
"documentString": "Managed OpenShift Customers may not modify the following default SCCs: [anyuid hostaccess hostmount-anyuid hostnetwork node-exporter nonroot privileged restricted]"
},
{
"webhookName": "techpreviewnoupgrade-validation",
"rules": [
{
"operations": [
"CREATE",
"UPDATE"
],
"apiGroups": [
"config.openshift.io"
],
"apiVersions": [
"*"
],
"resources": [
"featuregates"
],
"scope": "Cluster"
}
],
"documentString": "Managed OpenShift Customers may not use TechPreviewNoUpgrade FeatureGate that could prevent any future ability to do a y-stream upgrade to their clusters."
}
]