forked from docker/cli
/
stackclient.go
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/
stackclient.go
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package kubernetes
import (
"fmt"
composev1alpha3 "github.com/docker/compose-on-kubernetes/api/client/clientset/typed/compose/v1alpha3"
composev1beta1 "github.com/docker/compose-on-kubernetes/api/client/clientset/typed/compose/v1beta1"
composev1beta2 "github.com/docker/compose-on-kubernetes/api/client/clientset/typed/compose/v1beta2"
"github.com/docker/compose-on-kubernetes/api/compose/v1alpha3"
"github.com/docker/compose-on-kubernetes/api/compose/v1beta1"
"github.com/docker/compose-on-kubernetes/api/compose/v1beta2"
"github.com/docker/compose-on-kubernetes/api/labels"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/rest"
)
// StackClient talks to a kubernetes compose component.
type StackClient interface {
StackConverter
CreateOrUpdate(s Stack, childResources []childResource) error
Delete(name string) error
Get(name string) (Stack, error)
List(opts metav1.ListOptions) ([]Stack, error)
IsColliding(servicesClient corev1.ServiceInterface, s Stack) error
}
// stackV1Beta1 implements stackClient interface and talks to compose component v1beta1.
type stackV1Beta1 struct {
stackV1Beta1Converter
stacks composev1beta1.StackInterface
}
func newStackV1Beta1(config *rest.Config, namespace string) (*stackV1Beta1, error) {
client, err := composev1beta1.NewForConfig(config)
if err != nil {
return nil, err
}
return &stackV1Beta1{stacks: client.Stacks(namespace)}, nil
}
func (s *stackV1Beta1) CreateOrUpdate(internalStack Stack, childResources []childResource) error {
// If it already exists, update the stack
var (
stack *v1beta1.Stack
err error
)
if stack, err = s.stacks.Get(internalStack.Name, metav1.GetOptions{}); err == nil {
stack.Spec.ComposeFile = internalStack.ComposeFile
stack, err = s.stacks.Update(stack)
} else {
// Or create it
stack, err = s.stacks.Create(stackToV1beta1(internalStack))
}
if err != nil {
deleteChildResources(childResources)
return err
}
blockOwnerDeletion := true
isController := true
return setChildResourcesOwner(childResources, metav1.OwnerReference{
APIVersion: v1beta1.SchemeGroupVersion.String(),
Kind: "Stack",
Name: stack.Name,
UID: stack.UID,
BlockOwnerDeletion: &blockOwnerDeletion,
Controller: &isController,
})
}
func (s *stackV1Beta1) Delete(name string) error {
return s.stacks.Delete(name, &metav1.DeleteOptions{})
}
func (s *stackV1Beta1) Get(name string) (Stack, error) {
stackBeta1, err := s.stacks.Get(name, metav1.GetOptions{})
if err != nil {
return Stack{}, err
}
return stackFromV1beta1(stackBeta1)
}
func (s *stackV1Beta1) List(opts metav1.ListOptions) ([]Stack, error) {
list, err := s.stacks.List(opts)
if err != nil {
return nil, err
}
stacks := make([]Stack, len(list.Items))
for i := range list.Items {
stack, err := stackFromV1beta1(&list.Items[i])
if err != nil {
return nil, err
}
stacks[i] = stack
}
return stacks, nil
}
// IsColliding verifies that services defined in the stack collides with already deployed services
func (s *stackV1Beta1) IsColliding(servicesClient corev1.ServiceInterface, st Stack) error {
for _, srv := range st.getServices() {
if err := verify(servicesClient, st.Name, srv); err != nil {
return err
}
}
return nil
}
// verify checks whether the service is already present in kubernetes.
// If we find the service by name but it doesn't have our label or it has a different value
// than the stack name for the label, we fail (i.e. it will collide)
func verify(services corev1.ServiceInterface, stackName string, service string) error {
svc, err := services.Get(service, metav1.GetOptions{})
if err == nil {
if key, ok := svc.ObjectMeta.Labels[labels.ForStackName]; ok {
if key != stackName {
return fmt.Errorf("service %s already present in stack named %s", service, key)
}
return nil
}
return fmt.Errorf("service %s already present in the cluster", service)
}
return nil
}
// stackV1Beta2 implements stackClient interface and talks to compose component v1beta2.
type stackV1Beta2 struct {
stackV1Beta2Converter
stacks composev1beta2.StackInterface
}
func newStackV1Beta2(config *rest.Config, namespace string) (*stackV1Beta2, error) {
client, err := composev1beta2.NewForConfig(config)
if err != nil {
return nil, err
}
return &stackV1Beta2{stacks: client.Stacks(namespace)}, nil
}
func (s *stackV1Beta2) CreateOrUpdate(internalStack Stack, childResources []childResource) error {
var (
stack *v1beta2.Stack
err error
)
resolved, err := stackToV1beta2(internalStack)
if err != nil {
deleteChildResources(childResources)
return err
}
if stack, err = s.stacks.Get(internalStack.Name, metav1.GetOptions{}); err == nil {
stack.Spec = resolved.Spec
stack, err = s.stacks.Update(stack)
} else {
// Or create it
stack, err = s.stacks.Create(resolved)
}
if err != nil {
deleteChildResources(childResources)
return err
}
blockOwnerDeletion := true
isController := true
return setChildResourcesOwner(childResources, metav1.OwnerReference{
APIVersion: v1beta2.SchemeGroupVersion.String(),
Kind: "Stack",
Name: stack.Name,
UID: stack.UID,
BlockOwnerDeletion: &blockOwnerDeletion,
Controller: &isController,
})
}
func (s *stackV1Beta2) Delete(name string) error {
return s.stacks.Delete(name, &metav1.DeleteOptions{})
}
func (s *stackV1Beta2) Get(name string) (Stack, error) {
stackBeta2, err := s.stacks.Get(name, metav1.GetOptions{})
if err != nil {
return Stack{}, err
}
return stackFromV1beta2(stackBeta2)
}
func (s *stackV1Beta2) List(opts metav1.ListOptions) ([]Stack, error) {
list, err := s.stacks.List(opts)
if err != nil {
return nil, err
}
stacks := make([]Stack, len(list.Items))
for i := range list.Items {
if stacks[i], err = stackFromV1beta2(&list.Items[i]); err != nil {
return nil, err
}
}
return stacks, nil
}
// IsColliding is handle server side with the compose api v1beta2, so nothing to do here
func (s *stackV1Beta2) IsColliding(servicesClient corev1.ServiceInterface, st Stack) error {
return nil
}
// stackV1Beta2 implements stackClient interface and talks to compose component v1beta2.
type stackV1Alpha3 struct {
stackV1Alpha3Converter
stacks composev1alpha3.StackInterface
}
func newStackV1Alpha3(config *rest.Config, namespace string) (*stackV1Alpha3, error) {
client, err := composev1alpha3.NewForConfig(config)
if err != nil {
return nil, err
}
return &stackV1Alpha3{stacks: client.Stacks(namespace)}, nil
}
func (s *stackV1Alpha3) CreateOrUpdate(internalStack Stack, childResources []childResource) error {
var (
stack *v1alpha3.Stack
err error
)
resolved := stackToV1alpha3(internalStack)
if stack, err = s.stacks.Get(internalStack.Name, metav1.GetOptions{}); err == nil {
stack.Spec = resolved.Spec
stack, err = s.stacks.Update(stack)
} else {
// Or create it
stack, err = s.stacks.Create(resolved)
}
if err != nil {
deleteChildResources(childResources)
return err
}
blockOwnerDeletion := true
isController := true
return setChildResourcesOwner(childResources, metav1.OwnerReference{
APIVersion: v1alpha3.SchemeGroupVersion.String(),
Kind: "Stack",
Name: stack.Name,
UID: stack.UID,
BlockOwnerDeletion: &blockOwnerDeletion,
Controller: &isController,
})
}
func (s *stackV1Alpha3) Delete(name string) error {
return s.stacks.Delete(name, &metav1.DeleteOptions{})
}
func (s *stackV1Alpha3) Get(name string) (Stack, error) {
stackAlpha3, err := s.stacks.Get(name, metav1.GetOptions{})
if err != nil {
return Stack{}, err
}
return stackFromV1alpha3(stackAlpha3), nil
}
func (s *stackV1Alpha3) List(opts metav1.ListOptions) ([]Stack, error) {
list, err := s.stacks.List(opts)
if err != nil {
return nil, err
}
stacks := make([]Stack, len(list.Items))
for i := range list.Items {
stacks[i] = stackFromV1alpha3(&list.Items[i])
}
return stacks, nil
}
// IsColliding is handle server side with the compose api v1beta2, so nothing to do here
func (s *stackV1Alpha3) IsColliding(servicesClient corev1.ServiceInterface, st Stack) error {
return nil
}