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405 lines
14 KiB
Go
405 lines
14 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package testing
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import (
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"fmt"
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"math/rand"
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"reflect"
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"strconv"
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"testing"
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docker "github.com/fsouza/go-dockerclient"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/resource"
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"k8s.io/kubernetes/pkg/api/testapi"
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"k8s.io/kubernetes/pkg/api/unversioned"
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"k8s.io/kubernetes/pkg/apis/extensions"
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"k8s.io/kubernetes/pkg/fields"
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"k8s.io/kubernetes/pkg/labels"
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"k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/types"
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"k8s.io/kubernetes/pkg/util/intstr"
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"github.com/google/gofuzz"
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)
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// FuzzerFor can randomly populate api objects that are destined for version.
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func FuzzerFor(t *testing.T, version unversioned.GroupVersion, src rand.Source) *fuzz.Fuzzer {
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f := fuzz.New().NilChance(.5).NumElements(1, 1)
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if src != nil {
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f.RandSource(src)
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}
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f.Funcs(
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func(j *int, c fuzz.Continue) {
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*j = int(c.Int31())
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},
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func(j **int, c fuzz.Continue) {
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if c.RandBool() {
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i := int(c.Int31())
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*j = &i
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} else {
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*j = nil
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}
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},
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func(j *runtime.PluginBase, c fuzz.Continue) {
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// Do nothing; this struct has only a Kind field and it must stay blank in memory.
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},
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func(j *runtime.TypeMeta, c fuzz.Continue) {
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// We have to customize the randomization of TypeMetas because their
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// APIVersion and Kind must remain blank in memory.
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j.APIVersion = ""
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j.Kind = ""
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},
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func(j *unversioned.TypeMeta, c fuzz.Continue) {
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// We have to customize the randomization of TypeMetas because their
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// APIVersion and Kind must remain blank in memory.
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j.APIVersion = ""
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j.Kind = ""
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},
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func(j *api.ObjectMeta, c fuzz.Continue) {
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j.Name = c.RandString()
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j.ResourceVersion = strconv.FormatUint(c.RandUint64(), 10)
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j.SelfLink = c.RandString()
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j.UID = types.UID(c.RandString())
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j.GenerateName = c.RandString()
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var sec, nsec int64
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c.Fuzz(&sec)
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c.Fuzz(&nsec)
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j.CreationTimestamp = unversioned.Unix(sec, nsec).Rfc3339Copy()
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},
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func(j *api.ObjectReference, c fuzz.Continue) {
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// We have to customize the randomization of TypeMetas because their
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// APIVersion and Kind must remain blank in memory.
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j.APIVersion = c.RandString()
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j.Kind = c.RandString()
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j.Namespace = c.RandString()
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j.Name = c.RandString()
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j.ResourceVersion = strconv.FormatUint(c.RandUint64(), 10)
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j.FieldPath = c.RandString()
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},
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func(j *unversioned.ListMeta, c fuzz.Continue) {
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j.ResourceVersion = strconv.FormatUint(c.RandUint64(), 10)
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j.SelfLink = c.RandString()
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},
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func(j *api.ListOptions, c fuzz.Continue) {
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label, _ := labels.Parse("a=b")
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j.LabelSelector = label
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field, _ := fields.ParseSelector("a=b")
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j.FieldSelector = field
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},
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func(j *api.PodExecOptions, c fuzz.Continue) {
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j.Stdout = true
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j.Stderr = true
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},
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func(j *api.PodAttachOptions, c fuzz.Continue) {
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j.Stdout = true
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j.Stderr = true
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},
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func(s *api.PodSpec, c fuzz.Continue) {
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c.FuzzNoCustom(s)
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// has a default value
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ttl := int64(30)
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if c.RandBool() {
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ttl = int64(c.Uint32())
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}
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s.TerminationGracePeriodSeconds = &ttl
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c.Fuzz(s.SecurityContext)
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if s.SecurityContext == nil {
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s.SecurityContext = new(api.PodSecurityContext)
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}
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},
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func(j *api.PodPhase, c fuzz.Continue) {
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statuses := []api.PodPhase{api.PodPending, api.PodRunning, api.PodFailed, api.PodUnknown}
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*j = statuses[c.Rand.Intn(len(statuses))]
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},
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func(j *api.Binding, c fuzz.Continue) {
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c.Fuzz(&j.ObjectMeta)
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j.Target.Name = c.RandString()
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},
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func(j *api.ReplicationControllerSpec, c fuzz.Continue) {
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c.FuzzNoCustom(j) // fuzz self without calling this function again
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//j.TemplateRef = nil // this is required for round trip
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},
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func(j *extensions.DeploymentStrategy, c fuzz.Continue) {
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c.FuzzNoCustom(j) // fuzz self without calling this function again
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// Ensure that strategyType is one of valid values.
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strategyTypes := []extensions.DeploymentStrategyType{extensions.RecreateDeploymentStrategyType, extensions.RollingUpdateDeploymentStrategyType}
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j.Type = strategyTypes[c.Rand.Intn(len(strategyTypes))]
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if j.Type != extensions.RollingUpdateDeploymentStrategyType {
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j.RollingUpdate = nil
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} else {
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rollingUpdate := extensions.RollingUpdateDeployment{}
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if c.RandBool() {
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rollingUpdate.MaxUnavailable = intstr.FromInt(int(c.RandUint64()))
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rollingUpdate.MaxSurge = intstr.FromInt(int(c.RandUint64()))
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} else {
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rollingUpdate.MaxSurge = intstr.FromString(fmt.Sprintf("%d%%", c.RandUint64()))
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}
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j.RollingUpdate = &rollingUpdate
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}
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},
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func(j *extensions.JobSpec, c fuzz.Continue) {
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c.FuzzNoCustom(j) // fuzz self without calling this function again
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completions := int(c.Rand.Int31())
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parallelism := int(c.Rand.Int31())
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j.Completions = &completions
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j.Parallelism = ¶llelism
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},
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func(j *api.List, c fuzz.Continue) {
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c.FuzzNoCustom(j) // fuzz self without calling this function again
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// TODO: uncomment when round trip starts from a versioned object
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if false { //j.Items == nil {
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j.Items = []runtime.Object{}
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}
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},
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func(j *runtime.Object, c fuzz.Continue) {
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// TODO: uncomment when round trip starts from a versioned object
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if true { //c.RandBool() {
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*j = &runtime.Unknown{
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// apiVersion has rules now. Since it includes <group>/<version> and only `v1` can be bare,
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// then this must choose a valid format to deserialize
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TypeMeta: runtime.TypeMeta{Kind: "Something", APIVersion: "unknown.group/unknown"},
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RawJSON: []byte(`{"apiVersion":"unknown.group/unknown","kind":"Something","someKey":"someValue"}`),
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}
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} else {
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types := []runtime.Object{&api.Pod{}, &api.ReplicationController{}}
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t := types[c.Rand.Intn(len(types))]
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c.Fuzz(t)
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*j = t
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}
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},
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func(pb map[docker.Port][]docker.PortBinding, c fuzz.Continue) {
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// This is necessary because keys with nil values get omitted.
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// TODO: Is this a bug?
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pb[docker.Port(c.RandString())] = []docker.PortBinding{
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{c.RandString(), c.RandString()},
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{c.RandString(), c.RandString()},
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}
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},
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func(pm map[string]docker.PortMapping, c fuzz.Continue) {
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// This is necessary because keys with nil values get omitted.
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// TODO: Is this a bug?
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pm[c.RandString()] = docker.PortMapping{
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c.RandString(): c.RandString(),
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}
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},
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func(q *api.ResourceRequirements, c fuzz.Continue) {
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randomQuantity := func() resource.Quantity {
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return *resource.NewQuantity(c.Int63n(1000), resource.DecimalExponent)
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}
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q.Limits = make(api.ResourceList)
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q.Requests = make(api.ResourceList)
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cpuLimit := randomQuantity()
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q.Limits[api.ResourceCPU] = *cpuLimit.Copy()
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q.Requests[api.ResourceCPU] = *cpuLimit.Copy()
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memoryLimit := randomQuantity()
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q.Limits[api.ResourceMemory] = *memoryLimit.Copy()
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q.Requests[api.ResourceMemory] = *memoryLimit.Copy()
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storageLimit := randomQuantity()
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q.Limits[api.ResourceStorage] = *storageLimit.Copy()
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q.Requests[api.ResourceStorage] = *storageLimit.Copy()
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},
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func(q *api.LimitRangeItem, c fuzz.Continue) {
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randomQuantity := func() resource.Quantity {
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return *resource.NewQuantity(c.Int63n(1000), resource.DecimalExponent)
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}
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cpuLimit := randomQuantity()
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q.Type = api.LimitTypeContainer
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q.Default = make(api.ResourceList)
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q.Default[api.ResourceCPU] = *(cpuLimit.Copy())
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q.DefaultRequest = make(api.ResourceList)
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q.DefaultRequest[api.ResourceCPU] = *(cpuLimit.Copy())
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q.Max = make(api.ResourceList)
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q.Max[api.ResourceCPU] = *(cpuLimit.Copy())
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q.Min = make(api.ResourceList)
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q.Min[api.ResourceCPU] = *(cpuLimit.Copy())
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q.MaxLimitRequestRatio = make(api.ResourceList)
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q.MaxLimitRequestRatio[api.ResourceCPU] = resource.MustParse("10")
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},
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func(p *api.PullPolicy, c fuzz.Continue) {
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policies := []api.PullPolicy{api.PullAlways, api.PullNever, api.PullIfNotPresent}
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*p = policies[c.Rand.Intn(len(policies))]
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},
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func(rp *api.RestartPolicy, c fuzz.Continue) {
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policies := []api.RestartPolicy{api.RestartPolicyAlways, api.RestartPolicyNever, api.RestartPolicyOnFailure}
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*rp = policies[c.Rand.Intn(len(policies))]
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},
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// Only api.DownwardAPIVolumeFile needs to have a specific func since FieldRef has to be
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// defaulted to a version otherwise roundtrip will fail
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// For the remaining volume plugins the default fuzzer is enough.
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func(m *api.DownwardAPIVolumeFile, c fuzz.Continue) {
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m.Path = c.RandString()
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versions := []string{"v1"}
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m.FieldRef.APIVersion = versions[c.Rand.Intn(len(versions))]
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m.FieldRef.FieldPath = c.RandString()
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},
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func(vs *api.VolumeSource, c fuzz.Continue) {
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// Exactly one of the fields must be set.
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v := reflect.ValueOf(vs).Elem()
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i := int(c.RandUint64() % uint64(v.NumField()))
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t := v.Field(i).Addr()
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for v.Field(i).IsNil() {
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c.Fuzz(t.Interface())
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}
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},
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func(i *api.ISCSIVolumeSource, c fuzz.Continue) {
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i.ISCSIInterface = c.RandString()
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if i.ISCSIInterface == "" {
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i.ISCSIInterface = "default"
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}
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},
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func(d *api.DNSPolicy, c fuzz.Continue) {
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policies := []api.DNSPolicy{api.DNSClusterFirst, api.DNSDefault}
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*d = policies[c.Rand.Intn(len(policies))]
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},
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func(p *api.Protocol, c fuzz.Continue) {
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protocols := []api.Protocol{api.ProtocolTCP, api.ProtocolUDP}
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*p = protocols[c.Rand.Intn(len(protocols))]
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},
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func(p *api.ServiceAffinity, c fuzz.Continue) {
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types := []api.ServiceAffinity{api.ServiceAffinityClientIP, api.ServiceAffinityNone}
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*p = types[c.Rand.Intn(len(types))]
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},
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func(p *api.ServiceType, c fuzz.Continue) {
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types := []api.ServiceType{api.ServiceTypeClusterIP, api.ServiceTypeNodePort, api.ServiceTypeLoadBalancer}
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*p = types[c.Rand.Intn(len(types))]
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},
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func(ct *api.Container, c fuzz.Continue) {
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c.FuzzNoCustom(ct) // fuzz self without calling this function again
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ct.TerminationMessagePath = "/" + ct.TerminationMessagePath // Must be non-empty
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},
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func(p *api.Probe, c fuzz.Continue) {
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c.FuzzNoCustom(p)
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// These fields have default values.
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intFieldsWithDefaults := [...]string{"TimeoutSeconds", "PeriodSeconds", "SuccessThreshold", "FailureThreshold"}
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v := reflect.ValueOf(p).Elem()
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for _, field := range intFieldsWithDefaults {
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f := v.FieldByName(field)
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if f.Int() == 0 {
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f.SetInt(1)
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}
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}
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},
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func(ev *api.EnvVar, c fuzz.Continue) {
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ev.Name = c.RandString()
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if c.RandBool() {
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ev.Value = c.RandString()
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} else {
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ev.ValueFrom = &api.EnvVarSource{}
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ev.ValueFrom.FieldRef = &api.ObjectFieldSelector{}
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var versions []unversioned.GroupVersion
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for _, testGroup := range testapi.Groups {
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versions = append(versions, *testGroup.GroupVersion())
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}
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ev.ValueFrom.FieldRef.APIVersion = versions[c.Rand.Intn(len(versions))].String()
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ev.ValueFrom.FieldRef.FieldPath = c.RandString()
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}
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},
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func(sc *api.SecurityContext, c fuzz.Continue) {
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c.FuzzNoCustom(sc) // fuzz self without calling this function again
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if c.RandBool() {
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priv := c.RandBool()
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sc.Privileged = &priv
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}
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if c.RandBool() {
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sc.Capabilities = &api.Capabilities{
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Add: make([]api.Capability, 0),
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Drop: make([]api.Capability, 0),
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}
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c.Fuzz(&sc.Capabilities.Add)
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c.Fuzz(&sc.Capabilities.Drop)
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}
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},
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func(s *api.Secret, c fuzz.Continue) {
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c.FuzzNoCustom(s) // fuzz self without calling this function again
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s.Type = api.SecretTypeOpaque
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},
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func(pv *api.PersistentVolume, c fuzz.Continue) {
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c.FuzzNoCustom(pv) // fuzz self without calling this function again
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types := []api.PersistentVolumePhase{api.VolumeAvailable, api.VolumePending, api.VolumeBound, api.VolumeReleased, api.VolumeFailed}
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pv.Status.Phase = types[c.Rand.Intn(len(types))]
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pv.Status.Message = c.RandString()
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reclamationPolicies := []api.PersistentVolumeReclaimPolicy{api.PersistentVolumeReclaimRecycle, api.PersistentVolumeReclaimRetain}
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pv.Spec.PersistentVolumeReclaimPolicy = reclamationPolicies[c.Rand.Intn(len(reclamationPolicies))]
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},
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func(pvc *api.PersistentVolumeClaim, c fuzz.Continue) {
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c.FuzzNoCustom(pvc) // fuzz self without calling this function again
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types := []api.PersistentVolumeClaimPhase{api.ClaimBound, api.ClaimPending}
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pvc.Status.Phase = types[c.Rand.Intn(len(types))]
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},
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func(s *api.NamespaceSpec, c fuzz.Continue) {
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s.Finalizers = []api.FinalizerName{api.FinalizerKubernetes}
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},
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func(s *api.NamespaceStatus, c fuzz.Continue) {
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s.Phase = api.NamespaceActive
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},
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func(http *api.HTTPGetAction, c fuzz.Continue) {
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c.FuzzNoCustom(http) // fuzz self without calling this function again
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http.Path = "/" + http.Path // can't be blank
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http.Scheme = "x" + http.Scheme // can't be blank
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},
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func(ss *api.ServiceSpec, c fuzz.Continue) {
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c.FuzzNoCustom(ss) // fuzz self without calling this function again
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if len(ss.Ports) == 0 {
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// There must be at least 1 port.
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ss.Ports = append(ss.Ports, api.ServicePort{})
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c.Fuzz(&ss.Ports[0])
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}
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for i := range ss.Ports {
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switch ss.Ports[i].TargetPort.Type {
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case intstr.Int:
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ss.Ports[i].TargetPort.IntVal = 1 + ss.Ports[i].TargetPort.IntVal%65535 // non-zero
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case intstr.String:
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ss.Ports[i].TargetPort.StrVal = "x" + ss.Ports[i].TargetPort.StrVal // non-empty
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}
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}
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},
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func(n *api.Node, c fuzz.Continue) {
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c.FuzzNoCustom(n)
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n.Spec.ExternalID = "external"
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},
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func(s *api.NodeStatus, c fuzz.Continue) {
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c.FuzzNoCustom(s)
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s.Allocatable = s.Capacity
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},
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func(s *extensions.APIVersion, c fuzz.Continue) {
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// We can't use c.RandString() here because it may generate empty
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// string, which will cause tests failure.
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s.APIGroup = "something"
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},
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func(s *extensions.HorizontalPodAutoscalerSpec, c fuzz.Continue) {
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c.FuzzNoCustom(s) // fuzz self without calling this function again
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minReplicas := int(c.Rand.Int31())
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s.MinReplicas = &minReplicas
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s.CPUUtilization = &extensions.CPUTargetUtilization{TargetPercentage: int(int32(c.RandUint64()))}
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},
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)
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return f
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}
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