// checkAndUpdatePod updates existing, and:
// * if ref makes a meaningful change, returns needUpdate=true
// * if ref makes no meaningful change, but changes the pod status, returns needReconcile=true
// * else return both false
// Now, needUpdate and needReconcile should never be both true
func checkAndUpdatePod(existing, ref *api.Pod) (needUpdate, needReconcile bool) {
// TODO: it would be better to update the whole object and only preserve certain things
// like the source annotation or the UID (to ensure safety)
if !podsDifferSemantically(existing, ref) {
// this is not an update
// Only check reconcile when it is not an update, because if the pod is going to
// be updated, an extra reconcile is unnecessary
if !reflect.DeepEqual(existing.Status, ref.Status) {
// Pod with changed pod status needs reconcile, because kubelet should
// be the source of truth of pod status.
existing.Status = ref.Status
needReconcile = true
}
return
}
// this is an update
// Overwrite the first-seen time with the existing one. This is our own
// internal annotation, there is no need to update.
ref.Annotations[kubetypes.ConfigFirstSeenAnnotationKey] = existing.Annotations[kubetypes.ConfigFirstSeenAnnotationKey]
existing.Spec = ref.Spec
existing.Labels = ref.Labels
existing.DeletionTimestamp = ref.DeletionTimestamp
existing.DeletionGracePeriodSeconds = ref.DeletionGracePeriodSeconds
existing.Status = ref.Status
updateAnnotations(existing, ref)
needUpdate = true
return
}
// ToAPIPod converts Pod to api.Pod. Note that if a field in api.Pod has no
// corresponding field in Pod, the field would not be populated.
func (p *Pod) ToAPIPod() *api.Pod {
var pod api.Pod
pod.UID = p.ID
pod.Name = p.Name
pod.Namespace = p.Namespace
pod.Status = p.Status
for _, c := range p.Containers {
var container api.Container
container.Name = c.Name
container.Image = c.Image
pod.Spec.Containers = append(pod.Spec.Containers, container)
}
return &pod
}