Virtual nodes can be added to the GC graph in order to represent objects
which have not been observed via an informer, but are referenced via ownerReferences.
These virtual nodes are requeued into attemptToDelete until they are observed via an informer,
or successfully verified absent via a live lookup. Previously, both of those code paths
called markObserved() to stop requeuing into attemptToDelete.
Because it is useful to know whether a particular node has been observed via
a real informer event, this commit does the following:
* adds a `virtual bool` attribute to graph events so we know which ones came from a real informer
* limits the markObserved() call to the code path where a real informer event is observed
* uses an alternative mechanism to stop requeueing into attemptToDelete when a virtual node is verified absent via a live lookup
Before deleting an object based on absent owners, GC verifies absence of those owners with a live lookup.
The coordinates used to perform that live lookup are the ones specified in the ownerReference of the child.
In order to performantly delete multiple children from the same parent (e.g. 1000 pods from a replicaset),
a 404 response to a lookup is cached in absentOwnerCache.
Previously, the cache was a simple uid set. However, since children can disagree on the coordinates
that should be used to look up a given uid, the cache should record the exact coordinates verified absent.
This is a [apiVersion, kind, namespace, name, uid] tuple.
before this change, an object would be added to `attemptToDelete` queue only if `gc` detected the transition, simply by check if `deletionTimestamp` was set. After the change, it will check if `foregroundDeletion` finalizer has been set before adding the item to the queue.
Fix a TODO in GC controller that blocks using the new
PartialObjectMetadata flow (because we don't support PUT of
PartialObjectMetadata). This patch is equivalent to the previous
mutation.
Fixes#71730
0 indicates standby, 1 indicates master, label indicates which lease.
Tweaked name and documentation
Factored in Mike Danese feedback.
Removed dependency on prometheus from client-go using adapter.
Centralized adapter import.
Fixed godeps
Fixed boilerplate.
Put in fixes for caesarxuchao
- Move from the old github.com/golang/glog to k8s.io/klog
- klog as explicit InitFlags() so we add them as necessary
- we update the other repositories that we vendor that made a similar
change from glog to klog
* github.com/kubernetes/repo-infra
* k8s.io/gengo/
* k8s.io/kube-openapi/
* github.com/google/cadvisor
- Entirely remove all references to glog
- Fix some tests by explicit InitFlags in their init() methods
Change-Id: I92db545ff36fcec83afe98f550c9e630098b3135
