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create violation on existing namespace that dont satisfy the generate rules

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This commit is contained in:
shivkumar dudhani 2019-08-08 15:15:47 -07:00
parent 15092f6927
commit cc907bccba
2 changed files with 14 additions and 16 deletions
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1
examples/policy_generate_networkPolicy.yaml
View file

@ -4,7 +4,6 @@ metadata:
name: "defaultnetworkpolicy"
spec:
rules:
validationFailureAction: audit
- name: "default-networkPolicy"
match:
resources:

29
pkg/engine/generation.go
View file

@ -2,13 +2,14 @@ package engine
import (
"encoding/json"
"errors"
"fmt"
"github.com/golang/glog"
v1alpha1 "github.com/nirmata/kyverno/pkg/apis/policy/v1alpha1"
client "github.com/nirmata/kyverno/pkg/dclient"
"github.com/nirmata/kyverno/pkg/info"
"github.com/nirmata/kyverno/pkg/utils"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
)
@ -21,7 +22,7 @@ func Generate(client *client.Client, policy *v1alpha1.Policy, ns unstructured.Un
continue
}
ri := info.NewRuleInfo(rule.Name, info.Generation)
err := applyRuleGenerator(client, ns, rule.Generation, policy.Spec.ValidationFailureAction)
err := applyRuleGenerator(client, ns, rule.Generation, policy.GetCreationTimestamp())
if err != nil {
ri.Fail()
ri.Addf("Rule %s: Failed to apply rule generator, err %v.", rule.Name, err)
@ -34,11 +35,15 @@ func Generate(client *client.Client, policy *v1alpha1.Policy, ns unstructured.Un
return ris
}
func applyRuleGenerator(client *client.Client, ns unstructured.Unstructured, gen *v1alpha1.Generation, validationFailureAction string) error {
func applyRuleGenerator(client *client.Client, ns unstructured.Unstructured, gen *v1alpha1.Generation, policyCreationTime metav1.Time) error {
var err error
resource := &unstructured.Unstructured{}
var rdata map[string]interface{}
// To manage existing resource , we compare the creation time for the default resource to be generate and policy creation time
processExisting := func() bool {
nsCreationTime := ns.GetCreationTimestamp()
return nsCreationTime.Before(&policyCreationTime)
}()
if gen.Data != nil {
// 1> Check if resource exists
obj, err := client.GetResource(gen.Kind, ns.GetName(), gen.Name)
@ -51,7 +56,7 @@ func applyRuleGenerator(client *client.Client, ns unstructured.Unstructured, gen
return err
}
if !ok {
return errors.New("rule configuration not present in resource")
return fmt.Errorf("rule configuration not present in resource %s/%s", ns.GetName(), gen.Name)
}
return nil
}
@ -74,21 +79,15 @@ func applyRuleGenerator(client *client.Client, ns unstructured.Unstructured, gen
}
rdata = resource.UnstructuredContent()
}
if processExisting {
// for existing resources we generate an error which indirectly generates a policy violation
return fmt.Errorf("resource %s not found in existing namespace %s", gen.Name, ns.GetName())
}
resource.SetUnstructuredContent(rdata)
resource.SetName(gen.Name)
resource.SetNamespace(ns.GetName())
// Reset resource version
resource.SetResourceVersion("")
// TODO based on https://github.com/nirmata/kyverno/issues/268
// if validationFailureAction != "audit" {
// // if not audit, then enforce..
// // with enforce we will block the creation of resource and instead generate an error
// // the error will then create a policyViolation so that the resource owner can add the defaults
// return errors.New("policy flag validationFailureAction:'audit' blocked the creation of default resource for the namespace")
// }
// for "audit" mode, the resource will create the resource
// but wont generate a policy violation as the generate controller doesnt know if the generate request
// is a new resource via admission controller or via syncing its cache after a controller
_, err = client.CreateResource(gen.Kind, ns.GetName(), resource, false)
if err != nil {
return err