cri-o/vendor/k8s.io/kubernetes/pkg/api/testing/fuzzer.go
Michał Żyłowski 52baf68d50 Vendor: Update k8s version
Signed-off-by: Michał Żyłowski <michal.zylowski@intel.com>
2017-02-03 16:04:59 +01:00

613 lines
20 KiB
Go

/*
Copyright 2015 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package testing
import (
"fmt"
"math/rand"
"reflect"
"strconv"
"testing"
"github.com/google/gofuzz"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
"k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/resource"
"k8s.io/kubernetes/pkg/api/testapi"
"k8s.io/kubernetes/pkg/apis/autoscaling"
"k8s.io/kubernetes/pkg/apis/batch"
"k8s.io/kubernetes/pkg/apis/certificates"
"k8s.io/kubernetes/pkg/apis/extensions"
"k8s.io/kubernetes/pkg/apis/policy"
"k8s.io/kubernetes/pkg/apis/rbac"
"k8s.io/kubernetes/pkg/util/intstr"
)
// FuzzerFor can randomly populate api objects that are destined for version.
func FuzzerFor(t *testing.T, version schema.GroupVersion, src rand.Source) *fuzz.Fuzzer {
f := fuzz.New().NilChance(.5).NumElements(0, 1)
if src != nil {
f.RandSource(src)
}
f.Funcs(
func(j *int, c fuzz.Continue) {
*j = int(c.Int31())
},
func(j **int, c fuzz.Continue) {
if c.RandBool() {
i := int(c.Int31())
*j = &i
} else {
*j = nil
}
},
func(q *resource.Quantity, c fuzz.Continue) {
*q = *resource.NewQuantity(c.Int63n(1000), resource.DecimalExponent)
},
func(j *runtime.TypeMeta, c fuzz.Continue) {
// We have to customize the randomization of TypeMetas because their
// APIVersion and Kind must remain blank in memory.
j.APIVersion = ""
j.Kind = ""
},
func(j *metav1.TypeMeta, c fuzz.Continue) {
// We have to customize the randomization of TypeMetas because their
// APIVersion and Kind must remain blank in memory.
j.APIVersion = ""
j.Kind = ""
},
func(j *metav1.ObjectMeta, c fuzz.Continue) {
j.Name = c.RandString()
j.ResourceVersion = strconv.FormatUint(c.RandUint64(), 10)
j.SelfLink = c.RandString()
j.UID = types.UID(c.RandString())
j.GenerateName = c.RandString()
var sec, nsec int64
c.Fuzz(&sec)
c.Fuzz(&nsec)
j.CreationTimestamp = metav1.Unix(sec, nsec).Rfc3339Copy()
},
func(j *api.ObjectReference, c fuzz.Continue) {
// We have to customize the randomization of TypeMetas because their
// APIVersion and Kind must remain blank in memory.
j.APIVersion = c.RandString()
j.Kind = c.RandString()
j.Namespace = c.RandString()
j.Name = c.RandString()
j.ResourceVersion = strconv.FormatUint(c.RandUint64(), 10)
j.FieldPath = c.RandString()
},
func(j *metav1.ListMeta, c fuzz.Continue) {
j.ResourceVersion = strconv.FormatUint(c.RandUint64(), 10)
j.SelfLink = c.RandString()
},
func(j *api.ListOptions, c fuzz.Continue) {
label, _ := labels.Parse("a=b")
j.LabelSelector = label
field, _ := fields.ParseSelector("a=b")
j.FieldSelector = field
},
func(j *api.PodExecOptions, c fuzz.Continue) {
j.Stdout = true
j.Stderr = true
},
func(j *api.PodAttachOptions, c fuzz.Continue) {
j.Stdout = true
j.Stderr = true
},
func(j *api.PodPortForwardOptions, c fuzz.Continue) {
if c.RandBool() {
j.Ports = make([]int32, c.Intn(10))
for i := range j.Ports {
j.Ports[i] = c.Int31n(65535)
}
}
},
func(s *api.PodSpec, c fuzz.Continue) {
c.FuzzNoCustom(s)
// has a default value
ttl := int64(30)
if c.RandBool() {
ttl = int64(c.Uint32())
}
s.TerminationGracePeriodSeconds = &ttl
c.Fuzz(s.SecurityContext)
if s.SecurityContext == nil {
s.SecurityContext = new(api.PodSecurityContext)
}
if s.Affinity == nil {
s.Affinity = new(api.Affinity)
}
if s.SchedulerName == "" {
s.SchedulerName = api.DefaultSchedulerName
}
},
func(j *api.PodPhase, c fuzz.Continue) {
statuses := []api.PodPhase{api.PodPending, api.PodRunning, api.PodFailed, api.PodUnknown}
*j = statuses[c.Rand.Intn(len(statuses))]
},
func(j *api.Binding, c fuzz.Continue) {
c.Fuzz(&j.ObjectMeta)
j.Target.Name = c.RandString()
},
func(j *api.ReplicationControllerSpec, c fuzz.Continue) {
c.FuzzNoCustom(j) // fuzz self without calling this function again
//j.TemplateRef = nil // this is required for round trip
},
func(j *extensions.DeploymentStrategy, c fuzz.Continue) {
c.FuzzNoCustom(j) // fuzz self without calling this function again
// Ensure that strategyType is one of valid values.
strategyTypes := []extensions.DeploymentStrategyType{extensions.RecreateDeploymentStrategyType, extensions.RollingUpdateDeploymentStrategyType}
j.Type = strategyTypes[c.Rand.Intn(len(strategyTypes))]
if j.Type != extensions.RollingUpdateDeploymentStrategyType {
j.RollingUpdate = nil
} else {
rollingUpdate := extensions.RollingUpdateDeployment{}
if c.RandBool() {
rollingUpdate.MaxUnavailable = intstr.FromInt(int(c.Rand.Int31()))
rollingUpdate.MaxSurge = intstr.FromInt(int(c.Rand.Int31()))
} else {
rollingUpdate.MaxSurge = intstr.FromString(fmt.Sprintf("%d%%", c.Rand.Int31()))
}
j.RollingUpdate = &rollingUpdate
}
},
func(j *batch.JobSpec, c fuzz.Continue) {
c.FuzzNoCustom(j) // fuzz self without calling this function again
completions := int32(c.Rand.Int31())
parallelism := int32(c.Rand.Int31())
j.Completions = &completions
j.Parallelism = &parallelism
if c.Rand.Int31()%2 == 0 {
j.ManualSelector = newBool(true)
} else {
j.ManualSelector = nil
}
},
func(sj *batch.CronJobSpec, c fuzz.Continue) {
c.FuzzNoCustom(sj)
suspend := c.RandBool()
sj.Suspend = &suspend
sds := int64(c.RandUint64())
sj.StartingDeadlineSeconds = &sds
sj.Schedule = c.RandString()
},
func(cp *batch.ConcurrencyPolicy, c fuzz.Continue) {
policies := []batch.ConcurrencyPolicy{batch.AllowConcurrent, batch.ForbidConcurrent, batch.ReplaceConcurrent}
*cp = policies[c.Rand.Intn(len(policies))]
},
func(j *api.List, c fuzz.Continue) {
c.FuzzNoCustom(j) // fuzz self without calling this function again
// TODO: uncomment when round trip starts from a versioned object
if false { //j.Items == nil {
j.Items = []runtime.Object{}
}
},
func(j *runtime.Object, c fuzz.Continue) {
// TODO: uncomment when round trip starts from a versioned object
if true { //c.RandBool() {
*j = &runtime.Unknown{
// We do not set TypeMeta here because it is not carried through a round trip
Raw: []byte(`{"apiVersion":"unknown.group/unknown","kind":"Something","someKey":"someValue"}`),
ContentType: runtime.ContentTypeJSON,
}
} else {
types := []runtime.Object{&api.Pod{}, &api.ReplicationController{}}
t := types[c.Rand.Intn(len(types))]
c.Fuzz(t)
*j = t
}
},
func(q *api.ResourceRequirements, c fuzz.Continue) {
randomQuantity := func() resource.Quantity {
var q resource.Quantity
c.Fuzz(&q)
// precalc the string for benchmarking purposes
_ = q.String()
return q
}
q.Limits = make(api.ResourceList)
q.Requests = make(api.ResourceList)
cpuLimit := randomQuantity()
q.Limits[api.ResourceCPU] = *cpuLimit.Copy()
q.Requests[api.ResourceCPU] = *cpuLimit.Copy()
memoryLimit := randomQuantity()
q.Limits[api.ResourceMemory] = *memoryLimit.Copy()
q.Requests[api.ResourceMemory] = *memoryLimit.Copy()
storageLimit := randomQuantity()
q.Limits[api.ResourceStorage] = *storageLimit.Copy()
q.Requests[api.ResourceStorage] = *storageLimit.Copy()
},
func(q *api.LimitRangeItem, c fuzz.Continue) {
var cpuLimit resource.Quantity
c.Fuzz(&cpuLimit)
q.Type = api.LimitTypeContainer
q.Default = make(api.ResourceList)
q.Default[api.ResourceCPU] = *(cpuLimit.Copy())
q.DefaultRequest = make(api.ResourceList)
q.DefaultRequest[api.ResourceCPU] = *(cpuLimit.Copy())
q.Max = make(api.ResourceList)
q.Max[api.ResourceCPU] = *(cpuLimit.Copy())
q.Min = make(api.ResourceList)
q.Min[api.ResourceCPU] = *(cpuLimit.Copy())
q.MaxLimitRequestRatio = make(api.ResourceList)
q.MaxLimitRequestRatio[api.ResourceCPU] = resource.MustParse("10")
},
func(p *api.PullPolicy, c fuzz.Continue) {
policies := []api.PullPolicy{api.PullAlways, api.PullNever, api.PullIfNotPresent}
*p = policies[c.Rand.Intn(len(policies))]
},
func(rp *api.RestartPolicy, c fuzz.Continue) {
policies := []api.RestartPolicy{api.RestartPolicyAlways, api.RestartPolicyNever, api.RestartPolicyOnFailure}
*rp = policies[c.Rand.Intn(len(policies))]
},
// api.DownwardAPIVolumeFile needs to have a specific func since FieldRef has to be
// defaulted to a version otherwise roundtrip will fail
func(m *api.DownwardAPIVolumeFile, c fuzz.Continue) {
m.Path = c.RandString()
versions := []string{"v1"}
m.FieldRef = &api.ObjectFieldSelector{}
m.FieldRef.APIVersion = versions[c.Rand.Intn(len(versions))]
m.FieldRef.FieldPath = c.RandString()
c.Fuzz(m.Mode)
if m.Mode != nil {
*m.Mode &= 0777
}
},
func(s *api.SecretVolumeSource, c fuzz.Continue) {
c.FuzzNoCustom(s) // fuzz self without calling this function again
if c.RandBool() {
opt := c.RandBool()
s.Optional = &opt
}
// DefaultMode should always be set, it has a default
// value and it is expected to be between 0 and 0777
var mode int32
c.Fuzz(&mode)
mode &= 0777
s.DefaultMode = &mode
},
func(cm *api.ConfigMapVolumeSource, c fuzz.Continue) {
c.FuzzNoCustom(cm) // fuzz self without calling this function again
if c.RandBool() {
opt := c.RandBool()
cm.Optional = &opt
}
// DefaultMode should always be set, it has a default
// value and it is expected to be between 0 and 0777
var mode int32
c.Fuzz(&mode)
mode &= 0777
cm.DefaultMode = &mode
},
func(d *api.DownwardAPIVolumeSource, c fuzz.Continue) {
c.FuzzNoCustom(d) // fuzz self without calling this function again
// DefaultMode should always be set, it has a default
// value and it is expected to be between 0 and 0777
var mode int32
c.Fuzz(&mode)
mode &= 0777
d.DefaultMode = &mode
},
func(k *api.KeyToPath, c fuzz.Continue) {
c.FuzzNoCustom(k) // fuzz self without calling this function again
k.Key = c.RandString()
k.Path = c.RandString()
// Mode is not mandatory, but if it is set, it should be
// a value between 0 and 0777
if k.Mode != nil {
*k.Mode &= 0777
}
},
func(vs *api.VolumeSource, c fuzz.Continue) {
// Exactly one of the fields must be set.
v := reflect.ValueOf(vs).Elem()
i := int(c.RandUint64() % uint64(v.NumField()))
t := v.Field(i).Addr()
for v.Field(i).IsNil() {
c.Fuzz(t.Interface())
}
},
func(i *api.ISCSIVolumeSource, c fuzz.Continue) {
i.ISCSIInterface = c.RandString()
if i.ISCSIInterface == "" {
i.ISCSIInterface = "default"
}
},
func(d *api.DNSPolicy, c fuzz.Continue) {
policies := []api.DNSPolicy{api.DNSClusterFirst, api.DNSDefault}
*d = policies[c.Rand.Intn(len(policies))]
},
func(p *api.Protocol, c fuzz.Continue) {
protocols := []api.Protocol{api.ProtocolTCP, api.ProtocolUDP}
*p = protocols[c.Rand.Intn(len(protocols))]
},
func(p *api.ServiceAffinity, c fuzz.Continue) {
types := []api.ServiceAffinity{api.ServiceAffinityClientIP, api.ServiceAffinityNone}
*p = types[c.Rand.Intn(len(types))]
},
func(p *api.ServiceType, c fuzz.Continue) {
types := []api.ServiceType{api.ServiceTypeClusterIP, api.ServiceTypeNodePort, api.ServiceTypeLoadBalancer}
*p = types[c.Rand.Intn(len(types))]
},
func(ct *api.Container, c fuzz.Continue) {
c.FuzzNoCustom(ct) // fuzz self without calling this function again
ct.TerminationMessagePath = "/" + ct.TerminationMessagePath // Must be non-empty
ct.TerminationMessagePolicy = "File"
},
func(p *api.Probe, c fuzz.Continue) {
c.FuzzNoCustom(p)
// These fields have default values.
intFieldsWithDefaults := [...]string{"TimeoutSeconds", "PeriodSeconds", "SuccessThreshold", "FailureThreshold"}
v := reflect.ValueOf(p).Elem()
for _, field := range intFieldsWithDefaults {
f := v.FieldByName(field)
if f.Int() == 0 {
f.SetInt(1)
}
}
},
func(ev *api.EnvVar, c fuzz.Continue) {
ev.Name = c.RandString()
if c.RandBool() {
ev.Value = c.RandString()
} else {
ev.ValueFrom = &api.EnvVarSource{}
ev.ValueFrom.FieldRef = &api.ObjectFieldSelector{}
var versions []schema.GroupVersion
for _, testGroup := range testapi.Groups {
versions = append(versions, *testGroup.GroupVersion())
}
ev.ValueFrom.FieldRef.APIVersion = versions[c.Rand.Intn(len(versions))].String()
ev.ValueFrom.FieldRef.FieldPath = c.RandString()
}
},
func(ev *api.EnvFromSource, c fuzz.Continue) {
if c.RandBool() {
ev.Prefix = "p_"
}
if c.RandBool() {
c.Fuzz(&ev.ConfigMapRef)
} else {
c.Fuzz(&ev.SecretRef)
}
},
func(cm *api.ConfigMapEnvSource, c fuzz.Continue) {
c.FuzzNoCustom(cm) // fuzz self without calling this function again
if c.RandBool() {
opt := c.RandBool()
cm.Optional = &opt
}
},
func(s *api.SecretEnvSource, c fuzz.Continue) {
c.FuzzNoCustom(s) // fuzz self without calling this function again
},
func(sc *api.SecurityContext, c fuzz.Continue) {
c.FuzzNoCustom(sc) // fuzz self without calling this function again
if c.RandBool() {
priv := c.RandBool()
sc.Privileged = &priv
}
if c.RandBool() {
sc.Capabilities = &api.Capabilities{
Add: make([]api.Capability, 0),
Drop: make([]api.Capability, 0),
}
c.Fuzz(&sc.Capabilities.Add)
c.Fuzz(&sc.Capabilities.Drop)
}
},
func(s *api.Secret, c fuzz.Continue) {
c.FuzzNoCustom(s) // fuzz self without calling this function again
s.Type = api.SecretTypeOpaque
},
func(r *api.RBDVolumeSource, c fuzz.Continue) {
r.RBDPool = c.RandString()
if r.RBDPool == "" {
r.RBDPool = "rbd"
}
r.RadosUser = c.RandString()
if r.RadosUser == "" {
r.RadosUser = "admin"
}
r.Keyring = c.RandString()
if r.Keyring == "" {
r.Keyring = "/etc/ceph/keyring"
}
},
func(pv *api.PersistentVolume, c fuzz.Continue) {
c.FuzzNoCustom(pv) // fuzz self without calling this function again
types := []api.PersistentVolumePhase{api.VolumeAvailable, api.VolumePending, api.VolumeBound, api.VolumeReleased, api.VolumeFailed}
pv.Status.Phase = types[c.Rand.Intn(len(types))]
pv.Status.Message = c.RandString()
reclamationPolicies := []api.PersistentVolumeReclaimPolicy{api.PersistentVolumeReclaimRecycle, api.PersistentVolumeReclaimRetain}
pv.Spec.PersistentVolumeReclaimPolicy = reclamationPolicies[c.Rand.Intn(len(reclamationPolicies))]
},
func(pvc *api.PersistentVolumeClaim, c fuzz.Continue) {
c.FuzzNoCustom(pvc) // fuzz self without calling this function again
types := []api.PersistentVolumeClaimPhase{api.ClaimBound, api.ClaimPending, api.ClaimLost}
pvc.Status.Phase = types[c.Rand.Intn(len(types))]
},
func(obj *api.AzureDiskVolumeSource, c fuzz.Continue) {
if obj.CachingMode == nil {
obj.CachingMode = new(api.AzureDataDiskCachingMode)
*obj.CachingMode = api.AzureDataDiskCachingNone
}
if obj.FSType == nil {
obj.FSType = new(string)
*obj.FSType = "ext4"
}
if obj.ReadOnly == nil {
obj.ReadOnly = new(bool)
*obj.ReadOnly = false
}
},
func(s *api.NamespaceSpec, c fuzz.Continue) {
s.Finalizers = []api.FinalizerName{api.FinalizerKubernetes}
},
func(s *api.NamespaceStatus, c fuzz.Continue) {
s.Phase = api.NamespaceActive
},
func(http *api.HTTPGetAction, c fuzz.Continue) {
c.FuzzNoCustom(http) // fuzz self without calling this function again
http.Path = "/" + http.Path // can't be blank
http.Scheme = "x" + http.Scheme // can't be blank
},
func(ss *api.ServiceSpec, c fuzz.Continue) {
c.FuzzNoCustom(ss) // fuzz self without calling this function again
if len(ss.Ports) == 0 {
// There must be at least 1 port.
ss.Ports = append(ss.Ports, api.ServicePort{})
c.Fuzz(&ss.Ports[0])
}
for i := range ss.Ports {
switch ss.Ports[i].TargetPort.Type {
case intstr.Int:
ss.Ports[i].TargetPort.IntVal = 1 + ss.Ports[i].TargetPort.IntVal%65535 // non-zero
case intstr.String:
ss.Ports[i].TargetPort.StrVal = "x" + ss.Ports[i].TargetPort.StrVal // non-empty
}
}
},
func(n *api.Node, c fuzz.Continue) {
c.FuzzNoCustom(n)
n.Spec.ExternalID = "external"
},
func(s *api.NodeStatus, c fuzz.Continue) {
c.FuzzNoCustom(s)
s.Allocatable = s.Capacity
},
func(s *autoscaling.HorizontalPodAutoscalerSpec, c fuzz.Continue) {
c.FuzzNoCustom(s) // fuzz self without calling this function again
minReplicas := int32(c.Rand.Int31())
s.MinReplicas = &minReplicas
targetCpu := int32(c.RandUint64())
s.TargetCPUUtilizationPercentage = &targetCpu
},
func(psp *extensions.PodSecurityPolicySpec, c fuzz.Continue) {
c.FuzzNoCustom(psp) // fuzz self without calling this function again
runAsUserRules := []extensions.RunAsUserStrategy{extensions.RunAsUserStrategyMustRunAsNonRoot, extensions.RunAsUserStrategyMustRunAs, extensions.RunAsUserStrategyRunAsAny}
psp.RunAsUser.Rule = runAsUserRules[c.Rand.Intn(len(runAsUserRules))]
seLinuxRules := []extensions.SELinuxStrategy{extensions.SELinuxStrategyRunAsAny, extensions.SELinuxStrategyMustRunAs}
psp.SELinux.Rule = seLinuxRules[c.Rand.Intn(len(seLinuxRules))]
},
func(s *extensions.Scale, c fuzz.Continue) {
c.FuzzNoCustom(s) // fuzz self without calling this function again
// TODO: Implement a fuzzer to generate valid keys, values and operators for
// selector requirements.
if s.Status.Selector != nil {
s.Status.Selector = &metav1.LabelSelector{
MatchLabels: map[string]string{
"testlabelkey": "testlabelval",
},
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Key: "testkey",
Operator: metav1.LabelSelectorOpIn,
Values: []string{"val1", "val2", "val3"},
},
},
}
}
},
func(r *rbac.RoleRef, c fuzz.Continue) {
c.FuzzNoCustom(r) // fuzz self without calling this function again
// match defaulter
if len(r.APIGroup) == 0 {
r.APIGroup = rbac.GroupName
}
},
func(r *runtime.RawExtension, c fuzz.Continue) {
// Pick an arbitrary type and fuzz it
types := []runtime.Object{&api.Pod{}, &extensions.Deployment{}, &api.Service{}}
obj := types[c.Rand.Intn(len(types))]
c.Fuzz(obj)
// Find a codec for converting the object to raw bytes. This is necessary for the
// api version and kind to be correctly set be serialization.
var codec runtime.Codec
switch obj.(type) {
case *api.Pod:
codec = testapi.Default.Codec()
case *extensions.Deployment:
codec = testapi.Extensions.Codec()
case *api.Service:
codec = testapi.Default.Codec()
default:
t.Errorf("Failed to find codec for object type: %T", obj)
return
}
// Convert the object to raw bytes
bytes, err := runtime.Encode(codec, obj)
if err != nil {
t.Errorf("Failed to encode object: %v", err)
return
}
// Set the bytes field on the RawExtension
r.Raw = bytes
},
func(obj *kubeadm.MasterConfiguration, c fuzz.Continue) {
c.FuzzNoCustom(obj)
obj.KubernetesVersion = "v10"
obj.API.Port = 20
obj.Networking.ServiceSubnet = "foo"
obj.Networking.DNSDomain = "foo"
obj.AuthorizationMode = "foo"
obj.Discovery.Token = &kubeadm.TokenDiscovery{}
},
func(s *policy.PodDisruptionBudgetStatus, c fuzz.Continue) {
c.FuzzNoCustom(s) // fuzz self without calling this function again
s.PodDisruptionsAllowed = int32(c.Rand.Intn(2))
},
func(obj *certificates.CertificateSigningRequestSpec, c fuzz.Continue) {
c.FuzzNoCustom(obj) // fuzz self without calling this function again
obj.Usages = []certificates.KeyUsage{certificates.UsageKeyEncipherment}
},
)
return f
}
func newBool(val bool) *bool {
p := new(bool)
*p = val
return p
}