func (dc *DeploymentController) updateDeployment(old, cur interface{}) {
oldD := old.(*extensions.Deployment)
curD := cur.(*extensions.Deployment)
glog.V(4).Infof("Updating deployment %s", oldD.Name)
dc.enqueueDeployment(curD)
// If the selector of the current deployment just changed, we need to requeue any old
// overlapping deployments. If the new selector steps on another deployment, the current
// deployment will get denied during the resync loop.
if !reflect.DeepEqual(curD.Spec.Selector, oldD.Spec.Selector) {
deployments, err := dc.dLister.Deployments(curD.Namespace).List(labels.Everything())
if err != nil {
utilruntime.HandleError(fmt.Errorf("error listing deployments in namespace %s: %v", curD.Namespace, err))
return
}
// Trigger cleanup of any old overlapping deployments; we don't care about any error
// returned here.
for i := range deployments {
otherD := deployments[i]
oldOverlaps, oldErr := util.OverlapsWith(oldD, otherD)
curOverlaps, curErr := util.OverlapsWith(curD, otherD)
// Enqueue otherD so it gets cleaned up
if oldErr == nil && curErr == nil && oldOverlaps && !curOverlaps {
dc.enqueueDeployment(otherD)
}
}
}
}
func (dc *DeploymentController) deleteDeployment(obj interface{}) {
d, ok := obj.(*extensions.Deployment)
if !ok {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
utilruntime.HandleError(fmt.Errorf("Couldn't get object from tombstone %#v", obj))
return
}
d, ok = tombstone.Obj.(*extensions.Deployment)
if !ok {
utilruntime.HandleError(fmt.Errorf("Tombstone contained object that is not a Deployment %#v", obj))
return
}
}
glog.V(4).Infof("Deleting deployment %s", d.Name)
dc.enqueueDeployment(d)
deployments, err := dc.dLister.Deployments(d.Namespace).List(labels.Everything())
if err != nil {
utilruntime.HandleError(fmt.Errorf("error listing deployments in namespace %s: %v", d.Namespace, err))
return
}
// Trigger cleanup of any old overlapping deployments; we don't care about any error
// returned here.
for i := range deployments {
otherD := deployments[i]
overlaps, err := util.OverlapsWith(d, otherD)
// Enqueue otherD so it gets cleaned up
if err == nil && overlaps {
dc.enqueueDeployment(otherD)
}
}
}
// handleOverlap relists all deployment in the same namespace for overlaps, and avoid syncing
// the newer overlapping ones (only sync the oldest one). New/old is determined by when the
// deployment's selector is last updated.
func (dc *DeploymentController) handleOverlap(d *extensions.Deployment) error {
deployments, err := dc.dLister.Deployments(d.Namespace).List(labels.Everything())
if err != nil {
return fmt.Errorf("error listing deployments in namespace %s: %v", d.Namespace, err)
}
overlapping := false
for _, other := range deployments {
foundOverlaps, err := util.OverlapsWith(d, other)
if err != nil {
return err
}
if foundOverlaps {
deploymentCopy, err := util.DeploymentDeepCopy(other)
if err != nil {
return err
}
overlapping = true
// Skip syncing this one if older overlapping one is found.
if util.SelectorUpdatedBefore(deploymentCopy, d) {
// We don't care if the overlapping annotation update failed or not (we don't make decision on it)
dc.markDeploymentOverlap(d, deploymentCopy.Name)
dc.clearDeploymentOverlap(deploymentCopy)
return fmt.Errorf("found deployment %s/%s has overlapping selector with an older deployment %s/%s, skip syncing it", d.Namespace, d.Name, deploymentCopy.Namespace, deploymentCopy.Name)
}
dc.markDeploymentOverlap(deploymentCopy, d.Name)
d, _ = dc.clearDeploymentOverlap(d)
}
}
if !overlapping {
// We don't care if the overlapping annotation update failed or not (we don't make decision on it)
d, _ = dc.clearDeploymentOverlap(d)
}
return nil
}
// handleOverlap will avoid syncing the newer overlapping ones (only sync the oldest one). New/old is
// determined by when the deployment's selector is last updated.
func (dc *DeploymentController) handleOverlap(d *extensions.Deployment, deployments []*extensions.Deployment) (bool, error) {
overlapping := false
var errs []error
for i := range deployments {
otherD := deployments[i]
if d.Name == otherD.Name {
continue
}
// Error is already checked during validation
foundOverlaps, _ := util.OverlapsWith(d, otherD)
// If the otherD deployment overlaps with the current we need to identify which one
// holds the set longer and mark the other as overlapping. Requeue the overlapping
// deployments if this one has been marked deleted, we only update its status as long
// as it is not actually deleted.
if foundOverlaps && d.DeletionTimestamp == nil {
overlapping = true
// Look at the overlapping annotation in both deployments. If one of them has it and points
// to the other one then we don't need to compare their timestamps.
otherOverlapsWith := otherD.Annotations[util.OverlapAnnotation]
currentOverlapsWith := d.Annotations[util.OverlapAnnotation]
// The other deployment is already marked as overlapping with the current one.
if otherOverlapsWith == d.Name {
var err error
if d, err = dc.clearDeploymentOverlap(d, otherD.Name); err != nil {
errs = append(errs, err)
}
continue
}
otherCopy, err := util.DeploymentDeepCopy(otherD)
if err != nil {
return false, err
}
// Skip syncing this one if older overlapping one is found.
if currentOverlapsWith == otherCopy.Name || util.SelectorUpdatedBefore(otherCopy, d) {
if _, err = dc.markDeploymentOverlap(d, otherCopy.Name); err != nil {
return false, err
}
if _, err = dc.clearDeploymentOverlap(otherCopy, d.Name); err != nil {
return false, err
}
return true, fmt.Errorf("deployment %s/%s has overlapping selector with an older deployment %s/%s, skip syncing it", d.Namespace, d.Name, otherCopy.Namespace, otherCopy.Name)
}
// TODO: We need to support annotations in deployments that overlap with multiple other
// deployments.
if _, err = dc.markDeploymentOverlap(otherCopy, d.Name); err != nil {
errs = append(errs, err)
}
// This is going to get some deployments into update hotlooping if we remove the overlapping
// annotation unconditionally.
//
// Scenario:
// --> Deployment foo with label selector A=A is created.
// --> Deployment bar with label selector A=A,B=B is created. Marked as overlapping since it
// overlaps with foo.
// --> Deployment baz with label selector B=B is created. Marked as overlapping, since it
// overlaps with bar, bar overlapping annotation is cleaned up. Next sync loop marks bar
// as overlapping and it gets in an update hotloop.
if d, err = dc.clearDeploymentOverlap(d, otherCopy.Name); err != nil {
errs = append(errs, err)
}
continue
}
// If the otherD deployment does not overlap with the current deployment *anymore*
// we need to cleanup otherD from the overlapping annotation so it can be synced by
// the deployment controller.
dName, hasOverlappingAnnotation := otherD.Annotations[util.OverlapAnnotation]
if hasOverlappingAnnotation && dName == d.Name {
otherCopy, err := util.DeploymentDeepCopy(otherD)
if err != nil {
return false, err
}
if _, err = dc.clearDeploymentOverlap(otherCopy, d.Name); err != nil {
errs = append(errs, err)
}
}
}
if !overlapping {
var err error
if d, err = dc.clearDeploymentOverlap(d, ""); err != nil {
errs = append(errs, err)
}
}
return false, utilerrors.NewAggregate(errs)
}