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pods.go
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pods.go
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package meta
import (
"fmt"
appsv1beta1 "k8s.io/api/apps/v1beta1"
batchv1 "k8s.io/api/batch/v1"
batchv2alpha1 "k8s.io/api/batch/v2alpha1"
kapiv1 "k8s.io/api/core/v1"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/kubernetes/pkg/apis/apps"
"k8s.io/kubernetes/pkg/apis/batch"
kapi "k8s.io/kubernetes/pkg/apis/core"
"k8s.io/kubernetes/pkg/apis/extensions"
appsapiv1 "github.com/openshift/api/apps/v1"
securityapiv1 "github.com/openshift/api/security/v1"
appsapi "github.com/openshift/origin/pkg/apps/apis/apps"
securityapi "github.com/openshift/origin/pkg/security/apis/security"
)
type ContainerMutator interface {
GetName() string
GetImage() string
SetImage(image string)
}
type PodSpecReferenceMutator interface {
GetContainerByIndex(init bool, i int) (ContainerMutator, bool)
GetContainerByName(name string) (ContainerMutator, bool)
Path() *field.Path
}
// GetPodSpecReferenceMutator returns a mutator for the provided object, or an error if no
// such mutator is defined.
func GetPodSpecReferenceMutator(obj runtime.Object) (PodSpecReferenceMutator, error) {
if spec, path, err := GetPodSpec(obj); err == nil {
return &podSpecMutator{spec: spec, path: path}, nil
}
if spec, path, err := GetPodSpecV1(obj); err == nil {
return &podSpecV1Mutator{spec: spec, path: path}, nil
}
return nil, errNoImageMutator
}
// resourcesToCheck is a map of resources and corresponding kinds of things that
// we want handled in this plugin
var resourcesToCheck = map[schema.GroupResource]schema.GroupKind{
kapi.Resource("pods"): kapi.Kind("Pod"),
kapi.Resource("podtemplates"): kapi.Kind("PodTemplate"),
kapi.Resource("replicationcontrollers"): kapi.Kind("ReplicationController"),
batch.Resource("jobs"): batch.Kind("Job"),
batch.Resource("jobtemplates"): batch.Kind("JobTemplate"),
batch.Resource("cronjobs"): batch.Kind("CronJob"),
extensions.Resource("deployments"): extensions.Kind("Deployment"),
extensions.Resource("replicasets"): extensions.Kind("ReplicaSet"),
apps.Resource("statefulsets"): apps.Kind("StatefulSet"),
{Group: "", Resource: "deploymentconfigs"}: {Group: "", Kind: "DeploymentConfig"},
{Group: "", Resource: "podsecuritypolicysubjectreviews"}: {Group: "", Kind: "PodSecurityPolicySubjectReview"},
{Group: "", Resource: "podsecuritypolicyselfsubjectreviews"}: {Group: "", Kind: "PodSecurityPolicySelfSubjectReview"},
{Group: "", Resource: "podsecuritypolicyreviews"}: {Group: "", Kind: "PodSecurityPolicyReview"},
appsapi.Resource("deploymentconfigs"): appsapi.Kind("DeploymentConfig"),
securityapi.Resource("podsecuritypolicysubjectreviews"): securityapi.Kind("PodSecurityPolicySubjectReview"),
securityapi.Resource("podsecuritypolicyselfsubjectreviews"): securityapi.Kind("PodSecurityPolicySelfSubjectReview"),
securityapi.Resource("podsecuritypolicyreviews"): securityapi.Kind("PodSecurityPolicyReview"),
}
// HasPodSpec returns true if the resource is known to have a pod spec.
func HasPodSpec(gr schema.GroupResource) (schema.GroupKind, bool) {
gk, ok := resourcesToCheck[gr]
return gk, ok
}
var errNoPodSpec = fmt.Errorf("No PodSpec available for this object")
// GetPodSpec returns a mutable pod spec out of the provided object, including a field path
// to the field in the object, or an error if the object does not contain a pod spec.
// This only returns internal objects.
func GetPodSpec(obj runtime.Object) (*kapi.PodSpec, *field.Path, error) {
switch r := obj.(type) {
case *kapi.Pod:
return &r.Spec, field.NewPath("spec"), nil
case *kapi.PodTemplate:
return &r.Template.Spec, field.NewPath("template", "spec"), nil
case *kapi.ReplicationController:
if r.Spec.Template != nil {
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
}
case *extensions.DaemonSet:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *extensions.Deployment:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *extensions.ReplicaSet:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *batch.Job:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *batch.CronJob:
return &r.Spec.JobTemplate.Spec.Template.Spec, field.NewPath("spec", "jobTemplate", "spec", "template", "spec"), nil
case *batch.JobTemplate:
return &r.Template.Spec.Template.Spec, field.NewPath("template", "spec", "template", "spec"), nil
case *apps.StatefulSet:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *securityapi.PodSecurityPolicySubjectReview:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *securityapi.PodSecurityPolicySelfSubjectReview:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *securityapi.PodSecurityPolicyReview:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *appsapi.DeploymentConfig:
if r.Spec.Template != nil {
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
}
}
return nil, nil, errNoPodSpec
}
// GetPodSpecV1 returns a mutable pod spec out of the provided object, including a field path
// to the field in the object, or an error if the object does not contain a pod spec.
// This only returns pod specs for v1 compatible objects.
func GetPodSpecV1(obj runtime.Object) (*kapiv1.PodSpec, *field.Path, error) {
switch r := obj.(type) {
case *kapiv1.Pod:
return &r.Spec, field.NewPath("spec"), nil
case *kapiv1.PodTemplate:
return &r.Template.Spec, field.NewPath("template", "spec"), nil
case *kapiv1.ReplicationController:
if r.Spec.Template != nil {
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
}
case *extensionsv1beta1.DaemonSet:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *extensionsv1beta1.Deployment:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *extensionsv1beta1.ReplicaSet:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *batchv1.Job:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *batchv2alpha1.CronJob:
return &r.Spec.JobTemplate.Spec.Template.Spec, field.NewPath("spec", "jobTemplate", "spec", "template", "spec"), nil
case *batchv2alpha1.JobTemplate:
return &r.Template.Spec.Template.Spec, field.NewPath("template", "spec", "template", "spec"), nil
case *appsv1beta1.StatefulSet:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *appsv1beta1.Deployment:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *securityapiv1.PodSecurityPolicySubjectReview:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *securityapiv1.PodSecurityPolicySelfSubjectReview:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *securityapiv1.PodSecurityPolicyReview:
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
case *appsapiv1.DeploymentConfig:
if r.Spec.Template != nil {
return &r.Spec.Template.Spec, field.NewPath("spec", "template", "spec"), nil
}
}
return nil, nil, errNoPodSpec
}
// GetTemplateMetaObject returns a mutable metav1.Object interface for the template
// the object contains, or false if no such object is available.
func GetTemplateMetaObject(obj runtime.Object) (metav1.Object, bool) {
switch r := obj.(type) {
case *kapiv1.PodTemplate:
return &r.Template.ObjectMeta, true
case *kapiv1.ReplicationController:
if r.Spec.Template != nil {
return &r.Spec.Template.ObjectMeta, true
}
case *extensionsv1beta1.DaemonSet:
return &r.Spec.Template.ObjectMeta, true
case *extensionsv1beta1.Deployment:
return &r.Spec.Template.ObjectMeta, true
case *extensionsv1beta1.ReplicaSet:
return &r.Spec.Template.ObjectMeta, true
case *batchv1.Job:
return &r.Spec.Template.ObjectMeta, true
case *batchv2alpha1.CronJob:
return &r.Spec.JobTemplate.Spec.Template.ObjectMeta, true
case *batchv2alpha1.JobTemplate:
return &r.Template.Spec.Template.ObjectMeta, true
case *appsv1beta1.StatefulSet:
return &r.Spec.Template.ObjectMeta, true
case *appsv1beta1.Deployment:
return &r.Spec.Template.ObjectMeta, true
case *securityapiv1.PodSecurityPolicySubjectReview:
return &r.Spec.Template.ObjectMeta, true
case *securityapiv1.PodSecurityPolicySelfSubjectReview:
return &r.Spec.Template.ObjectMeta, true
case *securityapiv1.PodSecurityPolicyReview:
return &r.Spec.Template.ObjectMeta, true
case *appsapiv1.DeploymentConfig:
if r.Spec.Template != nil {
return &r.Spec.Template.ObjectMeta, true
}
case *kapi.PodTemplate:
return &r.Template.ObjectMeta, true
case *kapi.ReplicationController:
if r.Spec.Template != nil {
return &r.Spec.Template.ObjectMeta, true
}
case *extensions.DaemonSet:
return &r.Spec.Template.ObjectMeta, true
case *extensions.Deployment:
return &r.Spec.Template.ObjectMeta, true
case *extensions.ReplicaSet:
return &r.Spec.Template.ObjectMeta, true
case *batch.Job:
return &r.Spec.Template.ObjectMeta, true
case *batch.CronJob:
return &r.Spec.JobTemplate.Spec.Template.ObjectMeta, true
case *batch.JobTemplate:
return &r.Template.Spec.Template.ObjectMeta, true
case *apps.StatefulSet:
return &r.Spec.Template.ObjectMeta, true
case *securityapi.PodSecurityPolicySubjectReview:
return &r.Spec.Template.ObjectMeta, true
case *securityapi.PodSecurityPolicySelfSubjectReview:
return &r.Spec.Template.ObjectMeta, true
case *securityapi.PodSecurityPolicyReview:
return &r.Spec.Template.ObjectMeta, true
case *appsapi.DeploymentConfig:
if r.Spec.Template != nil {
return &r.Spec.Template.ObjectMeta, true
}
}
return nil, false
}
type containerMutator struct {
*kapi.Container
}
func (m containerMutator) GetName() string { return m.Name }
func (m containerMutator) GetImage() string { return m.Image }
func (m containerMutator) SetImage(image string) { m.Image = image }
type containerV1Mutator struct {
*kapiv1.Container
}
func (m containerV1Mutator) GetName() string { return m.Name }
func (m containerV1Mutator) GetImage() string { return m.Image }
func (m containerV1Mutator) SetImage(image string) { m.Image = image }
// podSpecMutator implements the mutation interface over objects with a pod spec.
type podSpecMutator struct {
spec *kapi.PodSpec
oldSpec *kapi.PodSpec
path *field.Path
}
func (m *podSpecMutator) Path() *field.Path {
return m.path
}
func hasIdenticalPodSpecImage(spec *kapi.PodSpec, containerName, image string) bool {
if spec == nil {
return false
}
for i := range spec.InitContainers {
if spec.InitContainers[i].Name == containerName {
return spec.InitContainers[i].Image == image
}
}
for i := range spec.Containers {
if spec.Containers[i].Name == containerName {
return spec.Containers[i].Image == image
}
}
return false
}
// Mutate applies fn to all containers and init containers. If fn changes the Kind to
// any value other than "DockerImage", an error is set on that field.
func (m *podSpecMutator) Mutate(fn ImageReferenceMutateFunc) field.ErrorList {
var errs field.ErrorList
for i := range m.spec.InitContainers {
container := &m.spec.InitContainers[i]
if hasIdenticalPodSpecImage(m.oldSpec, container.Name, container.Image) {
continue
}
ref := kapi.ObjectReference{Kind: "DockerImage", Name: container.Image}
if err := fn(&ref); err != nil {
errs = append(errs, fieldErrorOrInternal(err, m.path.Child("initContainers").Index(i).Child("image")))
continue
}
if ref.Kind != "DockerImage" {
errs = append(errs, fieldErrorOrInternal(fmt.Errorf("pod specs may only contain references to docker images, not %q", ref.Kind), m.path.Child("initContainers").Index(i).Child("image")))
continue
}
container.Image = ref.Name
}
for i := range m.spec.Containers {
container := &m.spec.Containers[i]
if hasIdenticalPodSpecImage(m.oldSpec, container.Name, container.Image) {
continue
}
ref := kapi.ObjectReference{Kind: "DockerImage", Name: container.Image}
if err := fn(&ref); err != nil {
errs = append(errs, fieldErrorOrInternal(err, m.path.Child("containers").Index(i).Child("image")))
continue
}
if ref.Kind != "DockerImage" {
errs = append(errs, fieldErrorOrInternal(fmt.Errorf("pod specs may only contain references to docker images, not %q", ref.Kind), m.path.Child("containers").Index(i).Child("image")))
continue
}
container.Image = ref.Name
}
return errs
}
func (m *podSpecMutator) GetContainerByName(name string) (ContainerMutator, bool) {
spec := m.spec
for i := range spec.InitContainers {
if name != spec.InitContainers[i].Name {
continue
}
return containerMutator{&spec.InitContainers[i]}, true
}
for i := range spec.Containers {
if name != spec.Containers[i].Name {
continue
}
return containerMutator{&spec.Containers[i]}, true
}
return nil, false
}
func (m *podSpecMutator) GetContainerByIndex(init bool, i int) (ContainerMutator, bool) {
var container *kapi.Container
spec := m.spec
if init {
if i < 0 || i >= len(spec.InitContainers) {
return nil, false
}
container = &spec.InitContainers[i]
} else {
if i < 0 || i >= len(spec.Containers) {
return nil, false
}
container = &spec.Containers[i]
}
return containerMutator{container}, true
}
// podSpecV1Mutator implements the mutation interface over objects with a pod spec.
type podSpecV1Mutator struct {
spec *kapiv1.PodSpec
oldSpec *kapiv1.PodSpec
path *field.Path
}
func (m *podSpecV1Mutator) Path() *field.Path {
return m.path
}
func hasIdenticalPodSpecV1Image(spec *kapiv1.PodSpec, containerName, image string) bool {
if spec == nil {
return false
}
for i := range spec.InitContainers {
if spec.InitContainers[i].Name == containerName {
return spec.InitContainers[i].Image == image
}
}
for i := range spec.Containers {
if spec.Containers[i].Name == containerName {
return spec.Containers[i].Image == image
}
}
return false
}
// Mutate applies fn to all containers and init containers. If fn changes the Kind to
// any value other than "DockerImage", an error is set on that field.
func (m *podSpecV1Mutator) Mutate(fn ImageReferenceMutateFunc) field.ErrorList {
var errs field.ErrorList
for i := range m.spec.InitContainers {
container := &m.spec.InitContainers[i]
if hasIdenticalPodSpecV1Image(m.oldSpec, container.Name, container.Image) {
continue
}
ref := kapi.ObjectReference{Kind: "DockerImage", Name: container.Image}
if err := fn(&ref); err != nil {
errs = append(errs, fieldErrorOrInternal(err, m.path.Child("initContainers").Index(i).Child("image")))
continue
}
if ref.Kind != "DockerImage" {
errs = append(errs, fieldErrorOrInternal(fmt.Errorf("pod specs may only contain references to docker images, not %q", ref.Kind), m.path.Child("initContainers").Index(i).Child("image")))
continue
}
container.Image = ref.Name
}
for i := range m.spec.Containers {
container := &m.spec.Containers[i]
if hasIdenticalPodSpecV1Image(m.oldSpec, container.Name, container.Image) {
continue
}
ref := kapi.ObjectReference{Kind: "DockerImage", Name: container.Image}
if err := fn(&ref); err != nil {
errs = append(errs, fieldErrorOrInternal(err, m.path.Child("containers").Index(i).Child("image")))
continue
}
if ref.Kind != "DockerImage" {
errs = append(errs, fieldErrorOrInternal(fmt.Errorf("pod specs may only contain references to docker images, not %q", ref.Kind), m.path.Child("containers").Index(i).Child("image")))
continue
}
container.Image = ref.Name
}
return errs
}
func (m *podSpecV1Mutator) GetContainerByName(name string) (ContainerMutator, bool) {
spec := m.spec
for i := range spec.InitContainers {
if name != spec.InitContainers[i].Name {
continue
}
return containerV1Mutator{&spec.InitContainers[i]}, true
}
for i := range spec.Containers {
if name != spec.Containers[i].Name {
continue
}
return containerV1Mutator{&spec.Containers[i]}, true
}
return nil, false
}
func (m *podSpecV1Mutator) GetContainerByIndex(init bool, i int) (ContainerMutator, bool) {
var container *kapiv1.Container
spec := m.spec
if init {
if i < 0 || i >= len(spec.InitContainers) {
return nil, false
}
container = &spec.InitContainers[i]
} else {
if i < 0 || i >= len(spec.Containers) {
return nil, false
}
container = &spec.Containers[i]
}
return containerV1Mutator{container}, true
}