// Returns an RC that matches the intent of the given deployment.
// It creates a new RC if required.
func (d *DeploymentController) getNewRC(deployment extensions.Deployment) (*api.ReplicationController, error) {
existingNewRC, err := deploymentutil.GetNewRC(deployment, d.client)
if err != nil || existingNewRC != nil {
return existingNewRC, err
}
// new RC does not exist, create one.
namespace := deployment.ObjectMeta.Namespace
podTemplateSpecHash := deploymentutil.GetPodTemplateSpecHash(deployment.Spec.Template)
newRCTemplate := deploymentutil.GetNewRCTemplate(deployment)
// Add podTemplateHash label to selector.
newRCSelector := deploymentutil.CloneAndAddLabel(deployment.Spec.Selector, deployment.Spec.UniqueLabelKey, podTemplateSpecHash)
newRC := api.ReplicationController{
ObjectMeta: api.ObjectMeta{
GenerateName: deployment.Name + "-",
Namespace: namespace,
},
Spec: api.ReplicationControllerSpec{
Replicas: 0,
Selector: newRCSelector,
Template: &newRCTemplate,
},
}
createdRC, err := d.client.ReplicationControllers(namespace).Create(&newRC)
if err != nil {
return nil, fmt.Errorf("error creating replication controller: %v", err)
}
return createdRC, nil
}
// Returns an RC that matches the intent of the given deployment.
// It creates a new RC if required.
func (d *DeploymentController) getNewRC(deployment extensions.Deployment) (*api.ReplicationController, error) {
existingNewRC, err := deploymentUtil.GetNewRC(deployment, d.client)
if err != nil || existingNewRC != nil {
return existingNewRC, err
}
// new RC does not exist, create one.
namespace := deployment.ObjectMeta.Namespace
podTemplateSpecHash := deploymentUtil.GetPodTemplateSpecHash(deployment.Spec.Template)
rcName := fmt.Sprintf("deploymentrc-%d", podTemplateSpecHash)
newRCTemplate := deploymentUtil.GetNewRCTemplate(deployment)
newRC := api.ReplicationController{
ObjectMeta: api.ObjectMeta{
Name: rcName,
Namespace: namespace,
},
Spec: api.ReplicationControllerSpec{
Replicas: 0,
Selector: newRCTemplate.ObjectMeta.Labels,
Template: newRCTemplate,
},
}
createdRC, err := d.client.ReplicationControllers(namespace).Create(&newRC)
if err != nil {
return nil, fmt.Errorf("error creating replication controller: %v", err)
}
return createdRC, nil
}
func (dc *DeploymentController) rollbackToTemplate(deployment *extensions.Deployment, rc *api.ReplicationController) (d *extensions.Deployment, performedRollback bool, err error) {
if !reflect.DeepEqual(deploymentutil.GetNewRCTemplate(*deployment), *rc.Spec.Template) {
glog.Infof("Rolling back deployment %s to template spec %+v", deployment.Name, rc.Spec.Template.Spec)
deploymentutil.SetFromRCTemplate(deployment, *rc.Spec.Template)
performedRollback = true
} else {
glog.V(4).Infof("Rolling back to a revision that contains the same template as current deployment %s, skipping rollback...", deployment.Name)
dc.emitRollbackWarningEvent(deployment, deploymentutil.RollbackTemplateUnchanged, fmt.Sprintf("The rollback revision contains the same template as current deployment %q", deployment.Name))
}
d, err = dc.updateDeploymentAndClearRollbackTo(deployment)
return
}
// Returns an RC that matches the intent of the given deployment.
// It creates a new RC if required.
func (dc *DeploymentController) getNewRC(deployment extensions.Deployment) (*api.ReplicationController, error) {
existingNewRC, err := deploymentutil.GetNewRCFromList(deployment, dc.client,
func(namespace string, options api.ListOptions) ([]api.ReplicationController, error) {
return dc.rcStore.List()
})
if err != nil || existingNewRC != nil {
return existingNewRC, err
}
// Check the rc expectations of deployment before creating a new rc
dKey, err := controller.KeyFunc(&deployment)
if err != nil {
return nil, fmt.Errorf("couldn't get key for deployment %#v: %v", deployment, err)
}
if !dc.rcExpectations.SatisfiedExpectations(dKey) {
dc.enqueueDeployment(&deployment)
return nil, fmt.Errorf("RC expectations not met yet before getting new RC\n")
}
// new RC does not exist, create one.
namespace := deployment.ObjectMeta.Namespace
podTemplateSpecHash := podutil.GetPodTemplateSpecHash(deployment.Spec.Template)
newRCTemplate := deploymentutil.GetNewRCTemplate(deployment)
// Add podTemplateHash label to selector.
newRCSelector := labelsutil.CloneAndAddLabel(deployment.Spec.Selector, deployment.Spec.UniqueLabelKey, podTemplateSpecHash)
// Set RC expectations (1 rc should be created)
dKey, err = controller.KeyFunc(&deployment)
if err != nil {
return nil, fmt.Errorf("couldn't get key for deployment controller %#v: %v", deployment, err)
}
dc.rcExpectations.ExpectCreations(dKey, 1)
// Create new RC
newRC := api.ReplicationController{
ObjectMeta: api.ObjectMeta{
GenerateName: deployment.Name + "-",
Namespace: namespace,
},
Spec: api.ReplicationControllerSpec{
Replicas: 0,
Selector: newRCSelector,
Template: &newRCTemplate,
},
}
createdRC, err := dc.client.ReplicationControllers(namespace).Create(&newRC)
if err != nil {
dc.rcExpectations.DeleteExpectations(dKey)
return nil, fmt.Errorf("error creating replication controller: %v", err)
}
return createdRC, nil
}
// Returns an RC that matches the intent of the given deployment.
// It creates a new RC if required.
// The revision of the new RC will be updated to maxOldRevision + 1
func (dc *DeploymentController) getNewRC(deployment extensions.Deployment, maxOldRevision int) (*api.ReplicationController, error) {
// Calculate revision number for this new RC
newRevision := strconv.Itoa(maxOldRevision + 1)
existingNewRC, err := deploymentutil.GetNewRCFromList(deployment, dc.client,
func(namespace string, options api.ListOptions) ([]api.ReplicationController, error) {
return dc.rcStore.ReplicationControllers(namespace).List(options.LabelSelector)
})
if err != nil {
return nil, err
} else if existingNewRC != nil {
if existingNewRC.Annotations == nil {
existingNewRC.Annotations = make(map[string]string)
}
if existingNewRC.Annotations[deploymentutil.RevisionAnnotation] != newRevision {
existingNewRC.Annotations[deploymentutil.RevisionAnnotation] = newRevision
glog.V(4).Infof("update existingNewRC's revision to %s - %+v\n", newRevision, existingNewRC)
return dc.client.ReplicationControllers(deployment.ObjectMeta.Namespace).Update(existingNewRC)
}
return existingNewRC, nil
}
// Check the rc expectations of deployment before creating a new rc
dKey, err := controller.KeyFunc(&deployment)
if err != nil {
return nil, fmt.Errorf("couldn't get key for deployment %#v: %v", deployment, err)
}
if !dc.rcExpectations.SatisfiedExpectations(dKey) {
dc.enqueueDeployment(&deployment)
return nil, fmt.Errorf("RC expectations not met yet before getting new RC\n")
}
// new RC does not exist, create one.
namespace := deployment.ObjectMeta.Namespace
podTemplateSpecHash := podutil.GetPodTemplateSpecHash(deployment.Spec.Template)
newRCTemplate := deploymentutil.GetNewRCTemplate(deployment)
// Add podTemplateHash label to selector.
newRCSelector := labelsutil.CloneAndAddLabel(deployment.Spec.Selector, deployment.Spec.UniqueLabelKey, podTemplateSpecHash)
// Set RC expectations (1 rc should be created)
dKey, err = controller.KeyFunc(&deployment)
if err != nil {
return nil, fmt.Errorf("couldn't get key for deployment controller %#v: %v", deployment, err)
}
dc.rcExpectations.ExpectCreations(dKey, 1)
// Create new RC
newRC := api.ReplicationController{
ObjectMeta: api.ObjectMeta{
GenerateName: deployment.Name + "-",
Namespace: namespace,
Annotations: map[string]string{deploymentutil.RevisionAnnotation: newRevision},
},
Spec: api.ReplicationControllerSpec{
Replicas: 0,
Selector: newRCSelector,
Template: &newRCTemplate,
},
}
createdRC, err := dc.client.ReplicationControllers(namespace).Create(&newRC)
if err != nil {
dc.rcExpectations.DeleteExpectations(dKey)
return nil, fmt.Errorf("error creating replication controller: %v", err)
}
if err = dc.updateDeploymentRevision(deployment, newRevision); err != nil {
return createdRC, err
}
return createdRC, nil
}