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etcd.go
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etcd.go
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package etcd
import (
"fmt"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/errors"
"k8s.io/kubernetes/pkg/api/rest"
"k8s.io/kubernetes/pkg/api/unversioned"
"k8s.io/kubernetes/pkg/apis/extensions"
kclient "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/fields"
"k8s.io/kubernetes/pkg/labels"
"k8s.io/kubernetes/pkg/registry/generic"
etcdgeneric "k8s.io/kubernetes/pkg/registry/generic/etcd"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/storage"
"github.com/openshift/origin/pkg/deploy/api"
"github.com/openshift/origin/pkg/deploy/registry/deployconfig"
"github.com/openshift/origin/pkg/deploy/util"
extvalidation "k8s.io/kubernetes/pkg/apis/extensions/validation"
)
// REST contains the REST storage for DeploymentConfig objects.
type REST struct {
*etcdgeneric.Etcd
}
// NewStorage returns a DeploymentConfigStorage containing the REST storage for
// DeploymentConfig objects and their Scale subresources.
func NewREST(s storage.Interface, rcNamespacer kclient.ReplicationControllersNamespacer) (*REST, *ScaleREST) {
prefix := "/deploymentconfigs"
store := &etcdgeneric.Etcd{
NewFunc: func() runtime.Object { return &api.DeploymentConfig{} },
NewListFunc: func() runtime.Object { return &api.DeploymentConfigList{} },
QualifiedResource: api.Resource("deploymentconfigs"),
KeyRootFunc: func(ctx kapi.Context) string {
return etcdgeneric.NamespaceKeyRootFunc(ctx, prefix)
},
KeyFunc: func(ctx kapi.Context, id string) (string, error) {
return etcdgeneric.NamespaceKeyFunc(ctx, prefix, id)
},
ObjectNameFunc: func(obj runtime.Object) (string, error) {
return obj.(*api.DeploymentConfig).Name, nil
},
PredicateFunc: func(label labels.Selector, field fields.Selector) generic.Matcher {
return deployconfig.Matcher(label, field)
},
CreateStrategy: deployconfig.Strategy,
UpdateStrategy: deployconfig.Strategy,
DeleteStrategy: deployconfig.Strategy,
ReturnDeletedObject: false,
Storage: s,
}
deploymentConfigREST := &REST{store}
scaleREST := &ScaleREST{
registry: deployconfig.NewRegistry(deploymentConfigREST),
rcNamespacer: rcNamespacer,
}
return deploymentConfigREST, scaleREST
}
// ScaleREST contains the REST storage for the Scale subresource of DeploymentConfigs.
type ScaleREST struct {
registry deployconfig.Registry
rcNamespacer kclient.ReplicationControllersNamespacer
}
// ScaleREST implements Patcher
var _ = rest.Patcher(&ScaleREST{})
// New creates a new Scale object
func (r *ScaleREST) New() runtime.Object {
return &extensions.Scale{}
}
// Get retrieves (computes) the Scale subresource for the given DeploymentConfig name.
func (r *ScaleREST) Get(ctx kapi.Context, name string) (runtime.Object, error) {
deploymentConfig, err := r.registry.GetDeploymentConfig(ctx, name)
if err != nil {
return nil, err
}
// TODO(directxman12): this is going to be a bit out of sync, since we are calculating it
// here and not as part of the deploymentconfig loop -- is there a better way of doing it?
totalReplicas, err := r.replicasForDeploymentConfig(deploymentConfig.Namespace, deploymentConfig.Name)
if err != nil {
return nil, err
}
return &extensions.Scale{
ObjectMeta: kapi.ObjectMeta{
Name: name,
Namespace: deploymentConfig.Namespace,
CreationTimestamp: deploymentConfig.CreationTimestamp,
},
Spec: extensions.ScaleSpec{
Replicas: deploymentConfig.Spec.Replicas,
},
Status: extensions.ScaleStatus{
Replicas: totalReplicas,
Selector: &unversioned.LabelSelector{MatchLabels: deploymentConfig.Spec.Selector},
},
}, nil
}
// Update scales the DeploymentConfig for the given Scale subresource, returning the updated Scale.
func (r *ScaleREST) Update(ctx kapi.Context, obj runtime.Object) (runtime.Object, bool, error) {
if obj == nil {
return nil, false, errors.NewBadRequest(fmt.Sprintf("nil update passed to Scale"))
}
scale, ok := obj.(*extensions.Scale)
if !ok {
return nil, false, errors.NewBadRequest(fmt.Sprintf("wrong object passed to Scale update: %v", obj))
}
if errs := extvalidation.ValidateScale(scale); len(errs) > 0 {
return nil, false, errors.NewInvalid(extensions.Kind("Scale"), scale.Name, errs)
}
deploymentConfig, err := r.registry.GetDeploymentConfig(ctx, scale.Name)
if err != nil {
return nil, false, errors.NewNotFound(extensions.Resource("scale"), scale.Name)
}
scaleRet := &extensions.Scale{
ObjectMeta: kapi.ObjectMeta{
Name: deploymentConfig.Name,
Namespace: deploymentConfig.Namespace,
CreationTimestamp: deploymentConfig.CreationTimestamp,
},
Spec: extensions.ScaleSpec{
Replicas: scale.Spec.Replicas,
},
Status: extensions.ScaleStatus{
Selector: &unversioned.LabelSelector{MatchLabels: deploymentConfig.Spec.Selector},
},
}
// TODO(directxman12): this is going to be a bit out of sync, since we are calculating it
// here and not as part of the deploymentconfig loop -- is there a better way of doing it?
totalReplicas, err := r.replicasForDeploymentConfig(deploymentConfig.Namespace, deploymentConfig.Name)
if err != nil {
return nil, false, err
}
oldReplicas := deploymentConfig.Spec.Replicas
deploymentConfig.Spec.Replicas = scale.Spec.Replicas
if err := r.registry.UpdateDeploymentConfig(ctx, deploymentConfig); err != nil {
return nil, false, err
}
scaleRet.Status.Replicas = totalReplicas + (scale.Spec.Replicas - oldReplicas)
return scaleRet, false, nil
}
func (r *ScaleREST) replicasForDeploymentConfig(namespace, configName string) (int, error) {
options := kapi.ListOptions{LabelSelector: util.ConfigSelector(configName)}
rcList, err := r.rcNamespacer.ReplicationControllers(namespace).List(options)
if err != nil {
return 0, err
}
replicas := 0
for _, rc := range rcList.Items {
replicas += rc.Spec.Replicas
}
return replicas, nil
}