mirror of
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105 lines
3.5 KiB
Go
105 lines
3.5 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/event"
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"github.com/nirmata/kyverno/pkg/info"
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"github.com/nirmata/kyverno/pkg/violation"
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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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)
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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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policyInfos := []*info.PolicyInfo{}
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var violations []*violation.Info
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var eventsInfo []*event.Info
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policies, err := ws.policyLister.List(labels.NewSelector())
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if err != nil {
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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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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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rname := engine.ParseNameFromObject(request.Object.Raw)
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rns := engine.ParseNamespaceFromObject(request.Object.Raw)
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rkind := engine.ParseKindFromObject(request.Object.Raw)
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policyInfo := info.NewPolicyInfo(policy.Name,
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rkind,
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rname,
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rns,
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policy.Spec.ValidationFailureAction)
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glog.V(3).Infof("Handling validation for Kind=%s, Namespace=%s Name=%s UID=%s patchOperation=%s",
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request.Kind.Kind, rns, rname, request.UID, request.Operation)
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glog.Infof("Validating resource %s/%s/%s with policy %s with %d rules", rkind, rns, rname, 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, rname, rns)
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for _, r := range ruleInfos {
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glog.Warning(r.Msgs)
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}
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} else {
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// CleanUp Violations if exists
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err := ws.violationBuilder.RemoveInactiveViolation(policy.Name, request.Kind.Kind, rns, rname, info.Validation)
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if err != nil {
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glog.Info(err)
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}
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if len(ruleInfos) > 0 {
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glog.Infof("Validation from policy %s has applied succesfully to %s %s/%s", policy.Name, request.Kind.Kind, rname, rns)
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}
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}
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policyInfos = append(policyInfos, policyInfo)
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}
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if len(policyInfos) > 0 && len(policyInfos[0].Rules) != 0 {
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eventsInfo, violations = newEventInfoFromPolicyInfo(policyInfos, (request.Operation == v1beta1.Update), true)
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// If the validationFailureAction flag is set "report",
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// then we dont block the request and report the violations
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ws.violationBuilder.Add(violations...)
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ws.eventController.Add(eventsInfo...)
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}
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// If Validation fails then reject the request
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ok, msg := isAdmSuccesful(policyInfos)
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// violations are created if "report" flag is set
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// and if there are any then we dont bock the resource creation
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// Even if one the policy being applied
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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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