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96 lines
3.4 KiB
Go
96 lines
3.4 KiB
Go
package webhooks
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import (
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"github.com/golang/glog"
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engine "github.com/nirmata/kyverno/pkg/engine"
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"github.com/nirmata/kyverno/pkg/info"
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v1beta1 "k8s.io/api/admission/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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// HandleValidation handles validating webhook admission request
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// If there are no errors in validating rule we apply generation rules
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func (ws *WebhookServer) HandleValidation(request *v1beta1.AdmissionRequest) *v1beta1.AdmissionResponse {
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// var patches [][]byte
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var policyInfos []*info.PolicyInfo
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glog.V(4).Infof("Receive request in validating webhook: Kind=%s, Namespace=%s Name=%s UID=%s patchOperation=%s",
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request.Kind.Kind, request.Namespace, request.Name, request.UID, request.Operation)
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policies, err := ws.policyLister.List(labels.NewSelector())
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if err != nil {
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//TODO check if the CRD is created ?
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// Unable to connect to policy Lister to access policies
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glog.Error("Unable to connect to policy controller to access policies. Validation Rules are NOT being applied")
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glog.Warning(err)
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return &v1beta1.AdmissionResponse{
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Allowed: true,
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}
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}
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resource, err := convertToUnstructured(request.Object.Raw)
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if err != nil {
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glog.Errorf("unable to convert raw resource to unstructured: %v", err)
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}
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//TODO: check if resource gvk is available in raw resource,
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// if not then set it from the api request
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resource.SetGroupVersionKind(schema.GroupVersionKind{Group: request.Kind.Group, Version: request.Kind.Version, Kind: request.Kind.Kind})
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//TODO: check if the name and namespace is also passed right in the resource?
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// all the patches to be applied on the resource
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for _, policy := range policies {
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if !StringInSlice(request.Kind.Kind, getApplicableKindsForPolicy(policy)) {
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continue
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}
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policyInfo := info.NewPolicyInfo(policy.Name, resource.GetKind(), resource.GetName(), resource.GetNamespace(), policy.Spec.ValidationFailureAction)
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glog.V(4).Infof("Handling validation for Kind=%s, Namespace=%s Name=%s UID=%s patchOperation=%s",
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resource.GetKind(), resource.GetNamespace(), resource.GetName(), request.UID, request.Operation)
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glog.V(4).Infof("Applying policy %s with %d rules\n", policy.ObjectMeta.Name, len(policy.Spec.Rules))
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ruleInfos, err := engine.Validate(*policy, request.Object.Raw, request.Kind)
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if err != nil {
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// This is not policy error
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// but if unable to parse request raw resource
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// TODO : create event ? dont think so
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glog.Error(err)
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continue
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}
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policyInfo.AddRuleInfos(ruleInfos)
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if !policyInfo.IsSuccessful() {
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glog.Infof("Failed to apply policy %s on resource %s/%s", policy.Name, resource.GetNamespace(), resource.GetName())
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glog.V(4).Info("Failed rule details")
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for _, r := range ruleInfos {
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glog.V(4).Infof("%s: %s\n", r.Name, r.Msgs)
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}
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continue
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}
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if len(ruleInfos) > 0 {
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glog.V(4).Infof("Validation from policy %s has applied succesfully to %s %s/%s", policy.Name, request.Kind.Kind, resource.GetNamespace(), resource.GetName())
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}
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policyInfos = append(policyInfos, policyInfo)
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}
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// ADD EVENTS
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// ADD POLICY VIOLATIONS
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ok, msg := isAdmSuccesful(policyInfos)
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if !ok && toBlock(policyInfos) {
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return &v1beta1.AdmissionResponse{
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Allowed: false,
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Result: &metav1.Status{
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Message: msg,
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},
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}
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}
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return &v1beta1.AdmissionResponse{
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Allowed: true,
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}
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// Generation rules applied via generation controller
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}
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