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Add Cluster field in ObjectMeta
There will be no sub-rs, but add `Cluster` field to the ObjectMeta (for all the objects)
"To distinguish the object at the federation level from it's constituents at the cluster level we will add a "Cluster" field to the metadata of all objects (where the federation itself will also have a cluster identifier). That way it is possible to list, interact with, and distinguish between the objects either at the federation level or at the individual cluster level based on the cluster identifier. "
@quinton-hoole @nikhiljindal @deepak-vij @mfanjie @huangyuqi
[]()
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Add readyReplicas to replica sets
@bgrant0607 for the api changes
@bprashanth for the controllers changes
@deads2k fyi
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Don't bind pre-bound pvc & pv if size request not satisfied
as discussed briefly here https://github.com/kubernetes/kubernetes/pull/30522 , volume size ought to be verified before binding a pv & pvc regardless of what's in the pv's claimRef. @thockin
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Followup fixes for disruption controller.
Part of #12611.
- Record an event when a pod does not have exactly 1 controller.
- Add TODO comment suggesting we simplify the two cases: integer and percentage.
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Bump heapster version
Bump heapster version to v1.2.0-beta.1.
Migrate metrics tests and HPA to use List objects introduced in the new version.
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Avoid failure message flush log when node no longer exist
When node is deleted, attach-detach controller cache may contain stale
information of this node, and update node status fails in reconciler
loop. This message easily flush the log file. This PR is just a quick
fix of this issue. More complete fix including make controller cache
up to date will be addressed in another PR.
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Node controller deletePod return true if there are pods pending deletion
Fixes https://github.com/kubernetes/kubernetes/issues/30536
If a node had a single pod in terminating state, and that node no longer reported healthy, the pod was never deleted by the node controller because it believed there were no pods remaining.
@smarterclayton @ncdc
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prevent RC hotloop on denied pods
If a pod is rejected during creation, the RC controller hot-loops. This can happen most frequently due to insufficient quota.
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Add Events for operation_executor to show status of mounts, failed/successful to show in describe events
Fixes#27590
@saad-ali @pmorie @erinboyd
After talking with @pmorie last week about the above issue, I decided to poke around and see if I could remedy. The refactoring broke my previous UXP merged PR's that correctly showed failed mount errors in the describe events. However, Not sure I implemented correctly, but it tested out and seems to be working, let me know what I missed or if this is not the correct approach.
```
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
2m 2m 1 {default-scheduler } Normal Scheduled Successfully assigned nfs-bb-pod1 to 127.0.0.1
44s 44s 1 {kubelet 127.0.0.1} Warning FailedMount Unable to mount volumes for pod "nfs-bb-pod1_default(a94f64f1-37c9-11e6-9aa5-52540073d346)": timeout expired waiting for volumes to attach/mount for pod "nfs-bb-pod1"/"default". list of unattached/unmounted volumes=[nfsvol]
44s 44s 1 {kubelet 127.0.0.1} Warning FailedSync Error syncing pod, skipping: timeout expired waiting for volumes to attach/mount for pod "nfs-bb-pod1"/"default". list of unattached/unmounted volumes=[nfsvol]
38s 38s 1 {kubelet } Warning FailedMount Unable to mount volumes for pod "a94f64f1-37c9-11e6-9aa5-52540073d346": Mount failed: exit status 32
Mounting arguments: nfs1.rhs:/opt/data99 /var/lib/kubelet/pods/a94f64f1-37c9-11e6-9aa5-52540073d346/volumes/kubernetes.io~nfs/nfsvol nfs []
Output: mount.nfs: Connection timed out
Resolution hint: Check and make sure the NFS Server exists (ensure that correct IPAddress/Hostname was given) and is available/reachable.
Also make sure firewall ports are open on both client and NFS Server (2049 v4 and 2049, 20048 and 111 for v3).
Use commands telnet <nfs server> <port> and showmount <nfs server> to help test connectivity.
```
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Add cluster health metrics to NodeController
Follow up of #28832
This adds metrics to monitor cluster/zone status.
cc @alex-mohr @fabioy @wojtek-t @Q-Lee
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Fix memory leak in gc
ref #30759
GC had a memory leak. The work queue item is never deleted.
I'm still fighting with my kubemark cluster to get statistics after this fix.
@wojtek-t @lavalamp
When node is deleted, attach-detach controller cache may contain stale
information of this node, and update node status fails in reconciler
loop. But one node update failure should not block updating other nodes.
Also the warning message easily flush the log file. This PR is just a quick
fix of this issue. More complete fix including make sure controller cache
up to date will be addressed in another PR.
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Implement dynamic provisioning (beta) of PersistentVolumes via StorageClass
Implemented according to PR #26908. There are several patches in this PR with one huge code regen inside.
* Please review the API changes (the first patch) carefully, sometimes I don't know what the code is doing...
* `PV.Spec.Class` and `PVC.Spec.Class` is not implemented, use annotation `volume.alpha.kubernetes.io/storage-class`
* See e2e test and integration test changes - Kubernetes won't provision a thing without explicit configuration of at least one `StorageClass` instance!
* Multiple provisioning volume plugins can coexist together, e.g. HostPath and AWS EBS. This is important for Gluster and RBD provisioners in #25026
* Contradicting the proposal, `claim.Selector` and `volume.alpha.kubernetes.io/storage-class` annotation are **not** mutually exclusive. They're both used for matching existing PVs. However, only `volume.alpha.kubernetes.io/storage-class` is used for provisioning, configuration of provisioning with `Selector` is left for (near) future.
* Documentation is missing. Can please someone write some while I am out?
For now, AWS volume plugin accepts classes with these parameters:
```
kind: StorageClass
metadata:
name: slow
provisionerType: kubernetes.io/aws-ebs
provisionerParameters:
type: io1
zone: us-east-1d
iopsPerGB: 10
```
* parameters are case-insensitive
* `type`: `io1`, `gp2`, `sc1`, `st1`. See AWS docs for details
* `iopsPerGB`: only for `io1` volumes. I/O operations per second per GiB. AWS volume plugin multiplies this with size of requested volume to compute IOPS of the volume and caps it at 20 000 IOPS (maximum supported by AWS, see AWS docs).
* of course, the plugin will use some defaults when a parameter is omitted in a `StorageClass` instance (`gp2` in the same zone as in 1.3).
GCE:
```
apiVersion: extensions/v1beta1
kind: StorageClass
metadata:
name: slow
provisionerType: kubernetes.io/gce-pd
provisionerParameters:
type: pd-standard
zone: us-central1-a
```
* `type`: `pd-standard` or `pd-ssd`
* `zone`: GCE zone
* of course, the plugin will use some defaults when a parameter is omitted in a `StorageClass` instance (SSD in the same zone as in 1.3 ?).
No OpenStack/Cinder yet
@kubernetes/sig-storage
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Continue on #30774: Change podNamespacer API
continue on #30774, credit to @wojtek-t, Ref #30759
I just fixed a test and converted IsActivePod to operate on *Pod.
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Expose flags for new NodeEviction logic in NodeController
Fix#28832
Last PR from the NodeController NodeEviction logic series.
cc @davidopp @lavalamp @mml
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Nodecontroller doesn't flip readiness on pods if kubeletVersion < 1.2.0
Older versions of the kubelet didn't know how to reconcile pod.Status, so the nodecontroller would mark pods NotReady on netsplit, and if the partition recovered in < 5m, the pods would never get marked Ready resulting in NotReady endpoints indefinitely (till kubelet restart/pod recreate etc).
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Fix default resource limits (node allocatable) for downward api volumes and env vars
@kubernetes/rh-cluster-infra @pmorie @derekwaynecarr
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Add NodeName to EndpointAddress object
Adding a new string type `nodeName` to api.EndpointAddress.
We could also do *ObjectReference to the api.Node object instead, which would be more precise for the future.
```
type ObjectReference struct {
Kind string `json:"kind,omitempty"`
Namespace string `json:"namespace,omitempty"`
Name string `json:"name,omitempty"`
UID types.UID `json:"uid,omitempty"`
APIVersion string `json:"apiVersion,omitempty"`
ResourceVersion string `json:"resourceVersion,omitempty"`
// Optional. If referring to a piece of an object instead of an entire object, this string
// should contain information to identify the sub-object. For example, if the object
// reference is to a container within a pod, this would take on a value like:
// "spec.containers{name}" (where "name" refers to the name of the container that triggered
// the event) or if no container name is specified "spec.containers[2]" (container with
// index 2 in this pod). This syntax is chosen only to have some well-defined way of
// referencing a part of an object.
// TODO: this design is not final and this field is subject to change in the future.
FieldPath string `json:"fieldPath,omitempty"`
}
```
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fix node controller event uid issue
Fix#29289. @smarterclayton ptal. This is not a very elegant fix, if we can use nodeName in log maybe we can set timedValue.Value to node.UID.
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Add volume reconstruct/cleanup logic in kubelet volume manager
Currently kubelet volume management works on the concept of desired
and actual world of states. The volume manager periodically compares the
two worlds and perform volume mount/unmount and/or attach/detach
operations. When kubelet restarts, the cache of those two worlds are
gone. Although desired world can be recovered through apiserver, actual
world can not be recovered which may cause some volumes cannot be cleaned
up if their information is deleted by apiserver. This change adds the
reconstruction of the actual world by reading the pod directories from
disk. The reconstructed volume information is added to both desired
world and actual world if it cannot be found in either world. The rest
logic would be as same as before, desired world populator may clean up
the volume entry if it is no longer in apiserver, and then volume
manager should invoke unmount to clean it up.
Fixes https://github.com/kubernetes/kubernetes/issues/27653
Currently kubelet volume management works on the concept of desired
and actual world of states. The volume manager periodically compares the
two worlds and perform volume mount/unmount and/or attach/detach
operations. When kubelet restarts, the cache of those two worlds are
gone. Although desired world can be recovered through apiserver, actual
world can not be recovered which may cause some volumes cannot be cleaned
up if their information is deleted by apiserver. This change adds the
reconstruction of the actual world by reading the pod directories from
disk. The reconstructed volume information is added to both desired
world and actual world if it cannot be found in either world. The rest
logic would be as same as before, desired world populator may clean up
the volume entry if it is no longer in apiserver, and then volume
manager should invoke unmount to clean it up.
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Move new etcd storage (low level storage) into cacher
In an effort for #29888, we are pushing forward this:
What?
- It changes creating etcd storage.Interface impl into creating config
- In creating cacher storage (StorageWithCacher), it passes config created above and new etcd storage inside.
Why?
- We want to expose the information of (etcd) kv client to cacher. Cacher storage uses this information to talk to remote storage.
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Endpoint controller logs errors during normal cluster behavior
The endpoint controller logs an error when its forbidden from creating new endpoints during namespace termination. This is normal cluster behavior, and therefore should not be logged. This confuses operators administrating the cluster.
Updated to log at a lower level in response to a forbidden message when performing a create operation. In case of an error on the API server side of the house, I continue to requeue the key. It should be ignored in a future syncService call once the service is deleted as part of namespace termination.
See https://bugzilla.redhat.com/show_bug.cgi?id=1347425
/cc @kubernetes/rh-cluster-infra
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Name jobs created by sj deterministically
```release-note
Name the job created by scheduledjob (sj) deterministically with sj's name and a hash of job's scheduled time.
```
@erictune @soltysh
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the observed usage should match those that have hard constraints
in the sync process, the quota will be replenished, the new observed usage will be sumed from each evaluator, if the previousUsed set is not be cleared, the new usage will be dirty, maybe some unusage resource still in , as the code below
newUsage = quota.Mask(newUsage, matchedResources)
for key, value := range newUsage {
usage.Status.Used[key] = value
}
so i think here shoul not set value previousUsed
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[GarbageCollector] measure latency
First commit is #27600.
In e2e tests, I measure the average time an item spend in the eventQueue(~1.5 ms), dirtyQueue(~13ms), and orphanQueue(~37ms). There is no stress test in e2e yet, so the number may not be useful.
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add metrics for workqueues
Adds prometheus metrics to work queues and enables them for the resourcequota controller. It would be easy to add this to all other workqueue based controllers and gather basic responsiveness metrics.
@kubernetes/rh-cluster-infra helps debug quota controller responsiveness problems.
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pkg/controller/garbagecollector: simplify mutexes.
pkg/controller/garbagecollector: simplified synchronization and made idiomatic.
Similar to #29598, we can rely on the zero-value construction behavior
to embed `sync.Mutex` into parent structs.
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HPA: ignore scale targets whose replica count is 0
Disable HPA when the user (or another component) explicitly sets the replicas to 0.
Fixes#28603
@kubernetes/autoscaling @fgrzadkowski @kubernetes/rh-cluster-infra @smarterclayton @ncdc
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Also, fix unit tests to have the same claim and volume sizes in most of the
tests where we don't test matching based on size and test for a specific size
when we do actually test the matching.
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Run goimport for the whole repo
While removing GOMAXPROC and running goimports, I noticed quite a lot of other files also needed a goimport format. Didn't commit `*.generated.go`, `*.deepcopy.go` or files in `vendor`
This is more for testing if it builds.
The only strange thing here is the gopkg.in/gcfg.v1 => github.com/scalingdata/gcfg replace.
cc @jfrazelle @thockin
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optimize conditions of ServiceReplenishmentUpdateFunc to replenish service
Originally, the replenishQuota method didn't focus on the third parameter object even if others transfered to it, i think the function is not efficient and perfect. then i use the third param to get MatchResources, it will be more exact. for example, if the old pod was quota tracked and the new was not, the replenishQuota only focus on usage resource of the old pod, still if the third parameter object is nil, the process will be same as before
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refactor quota calculation for re-use
Refactors quota calculation to allow reuse. This will allow us to do "punch through" calculation inside of admission if a particular quota needs usage stats and allows downstream re-use by moving calculation closer to the evaluators and separating "needs calculation" logic from "do calculation".
@derekwaynecarr
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Rewrite service controller to apply best controller pattern
This PR is a long term solution for #21625:
We apply the same pattern like replication controller to service controller to avoid the potential process order messes in service controller, the change includes:
1. introduce informer controller to watch service changes from kube-apiserver, so that every changes on same service will be kept in serviceStore as the only element.
2. put the service name to be processed to working queue
3. when process service, always get info from serviceStore to ensure the info is up-to-date
4. keep the retry mechanism, sleep for certain interval and add it back to queue.
5. remote the logic of reading last service info from kube-apiserver before processing the LB info as we trust the info from serviceStore.
The UT has been passed, manual test passed after I hardcode the cloud provider as FakeCloud, however I am not able to boot a k8s cluster with any available cloudprovider, so e2e test is not done.
Submit this PR first for review and for triggering a e2e test.
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Fix deployment e2e test: waitDeploymentStatus should error when entering an invalid state
Follow up #28162
1. We should check that max unavailable and max surge aren't violated at all times in e2e tests (didn't check this in deployment scaled rollout yet, but we should wait for it to become valid and then continue do the check until it finishes)
2. Fix some minor bugs in e2e tests
@kubernetes/deployment
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Stabilize volume unit tests by waiting for exact state
Wait for specific final state instead of waiting for specific number of
operations in controller unit tests. The tests are more readable and will survive
random goroutine ordering (PV and PVC controller have both their own
goroutine).
@kubernetes/sig-storage
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add union registry for quota
Adds the ability to combine multiple quota registries together. Kube needs this for other types.
@derekwaynecarr
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Error out when any RS has more available pods then its spec replicas
Fixes#29559 (hopefully, if not the bot will open new issues for us)
@kubernetes/deployment
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pkg/various: plug leaky time.New{Timer,Ticker}s
According to the documentation for Go package time, `time.Ticker` and
`time.Timer` are uncollectable by garbage collector finalizers. They
leak until otherwise stopped. This commit ensures that all remaining
instances are stopped upon departure from their relative scopes.
Similar efforts were incrementally done in #29439 and #29114.
```release-note
* pkg/various: plugged various time.Ticker and time.Timer leaks.
```
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pkg/controller/node/nodecontroller: simplify mutex
Similar to #29598, we can rely on the zero-value construction behavior
to embed `sync.Mutex` into parent structs.
/CC: @saad-ali
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make the resource prefix in etcd configurable for cohabitation
This looks big, its not as bad as it seems.
When you have different resources cohabiting, the resource name used for the etcd directory needs to be configurable. HPA in two different groups worked fine before. Now we're looking at something like RC<->RS. They normally store into two different etcd directories. This code allows them to be configured to store into the same location.
To maintain consistency across all resources, I allowed the `StorageFactory` to indicate which `ResourcePrefix` should be used inside `RESTOptions` which already contains storage information.
@lavalamp affects cohabitation.
@smarterclayton @mfojtik prereq for our rc<->rs and d<->dc story.
For non-attachable volumes, do not call GetVolumeName on the plugin and instead
generate a unique name based on the identity of the pod and the name of the volume
within the pod.
Automatic merge from submit-queue
Add an Azure CloudProvider Implementation
This PR adds `Azure` as a cloudprovider provider for Kubernetes. It specifically adds support for native pod networking (via Azure User Defined Routes) and L4 Load Balancing (via Azure Load Balancers).
I did have to add `clusterName` as a parameter to the `LoadBalancers` methods. This is because Azure only allows one "LoadBalancer" object per set of backend machines. This means a single "LoadBalancer" object must be shared across the cluster. The "LoadBalancer" is named via the `cluster-name` parameter passed to `kube-controller-manager` so as to enable multiple clusters per resource group if the user desires such a configuration.
There are few things that I'm a bit unsure about:
1. The implementation of the `Instances` interface. It's not extensively documented, it's not really clear what the different functions are used for, and my questions on the ML didn't get an answer.
2. Counter to the comments on the `LoadBalancers` Interface, I modify the `api.Service` object in `EnsureLoadBalancerDeleted`, but not with the intention of affecting Kube's view of the Service. I simply do it so that I can remove the `Port`s on the `Service` object and then re-use my reconciliation logic that can handle removing stale/deleted Ports.
3. The logging is a bit verbose. I'm looking for guidance on the appropriate log level to use for the chattier bits.
Due to the (current) lack of Instance Metadata Service and lack of Virtual Machine Identity in Azure, the user is required to do a few things to opt-in to this provider. These things are called-out as they are in contrast to AWS/GCE:
1. The user must provision an Azure Active Directory ServicePrincipal with `Contributor` level access to the resource group that the cluster is deployed in. This creation process is documented [by Hashicorp](https://www.packer.io/docs/builders/azure-setup.html) or [on the MSDN Blog](https://blogs.msdn.microsoft.com/arsen/2016/05/11/how-to-create-and-test-azure-service-principal-using-azure-cli/).
2. The user must place a JSON file somewhere on each Node that conforms to the `AzureConfig` struct defined in `azure.go`. (This is automatically done in the Azure flavor of [Kubernetes-Anywhere](https://github.com/kubernetes/kubernetes-anywhere).)
3. The user must specify `--cloud-config=/path/to/azure.json` as an option to `kube-apiserver` and `kube-controller-manager` similarly to how the user would need to pass `--cloud-provider=azure`.
I've been running approximately this code for a month and a half. I only encountered one bug which has since been fixed and covered by a unit test. I've just deployed a new cluster (and a Type=LoadBalancer nginx Service) using this code (via `kubernetes-anywhere`) and have posted [the `kube-controller-manager` logs](https://gist.github.com/colemickens/1bf6a26e7ef9484a72a30b1fcf9fc3cb) for anyone who is interested in seeing the logs of the logic.
If you're interested in this PR, you can use the instructions in my [`azure-kubernetes-demo` repository](https://github.com/colemickens/azure-kubernetes-demo) to deploy a cluster with minimal effort via [`kubernetes-anywhere`](https://github.com/kubernetes/kubernetes-anywhere). (There is currently [a pending PR in `kubernetes-anywhere` that is needed](https://github.com/kubernetes/kubernetes-anywhere/pull/172) in conjuncture with this PR). I also have a pre-built `hyperkube` image: `docker.io/colemickens/hyperkube-amd64:v1.4.0-alpha.0-azure`, which will be kept in sync with the branch this PR stems from.
I'm hoping this can land in the Kubernetes 1.4 timeframe.
CC (potential code reviewers from Azure): @ahmetalpbalkan @brendandixon @paulmey
CC (other interested Azure folk): @brendandburns @johngossman @anandramakrishna @jmspring @jimzim
CC (others who've expressed interest): @codefx9 @edevil @thockin @rootfs
According to the documentation for Go package time, `time.Ticker` and
`time.Timer` are uncollectable by garbage collector finalizers. They
leak until otherwise stopped. This commit ensures that all remaining
instances are stopped upon departure from their relative scopes.
Automatic merge from submit-queue
To break the loop when object found in removeOrphanFinalizer()
To break the loop when object found in removeOrphanFinalizer()
Automatic merge from submit-queue
Allow shareable resources for admission control plugins.
Changes allow admission control plugins to share resources. This is done via new PluginInitialization structure. The structure can be extended for other resources, for now it is an shared informer for namespace plugins (NamespiceLifecycle, NamespaceAutoProvisioning, NamespaceExists).
If a plugins needs some kind of shared resource e.g. client, the client shall be added to PluginInitializer and Wants methods implemented to every plugin which will use it.
Automatic merge from submit-queue
controller/service: minor cleanup
1. always handle short case first for if statement
2. do not capitalize error message
3. put the mutex before the fields it protects
4. prefer switch over if elseif.
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use a separate queue for initial quota calculation
When the quota controller gets backed up on resyncs, it can take a long time to observe the first usage stats which are needed by the admission plugin. This creates a second queue to prioritize the initial calculation.
Automatic merge from submit-queue
Fix "PVC Volume not detached if pod deleted via namespace deletion" issue
Fixes#29051: "PVC Volume not detached if pod deleted via namespace deletion"
This PR:
* Fixes a bug in `desired_state_of_the_world_populator.go` to check the value of `exists` returned by the `podInformer` so that it can delete pods even if the delete event is missed (or fails).
* Reduces the desired state of the world populators sleep period from 5 min to 1 min (reducing the amount of time a volume would remain attached if a volume delete event is missed or fails).
Automatic merge from submit-queue
Allow mounts to run in parallel for non-attachable volumes
This PR:
* Fixes https://github.com/kubernetes/kubernetes/issues/28616
* Enables mount volume operations to run in parallel for non-attachable volume plugins.
* Enables unmount volume operations to run in parallel for all volume plugins.
* Renames `GoRoutineMap` to `GoroutineMap`, resolving a long outstanding request from @thockin: `"Goroutine" is a noun`
When a new rollout with a different size than the previous size of the
deployment is initiated then only the new replica set will notice the
new size. Old replica sets are not updated by the rollout path.
Allow mount volume operations to run in parallel for non-attachable
volume plugins.
Allow unmount volume operations to run in parallel for all volume
plugins.
Automatic merge from submit-queue
Certificate signing controller for TLS bootstrap (alpha)
The controller handles generating and signing certificates when a CertificateSigningRequest has the "Approved" condition. Uses cfssl to support a wide set of possible keys and algorithms. Depends on PR #25562, only the last two commits are relevant to this PR.
cc @mikedanese
[]()
Automatic merge from submit-queue
Improve quota controller performance by eliminating unneeded list calls
Previously, when syncing quota usage, we asked each registered `Evaluator` to determine the usage it knows to track associated with a `GroupKind` even if that particular `GroupKind` had no associated resources under quota.
This fix makes it that when we sync a quota that just had only `Pod` related compute resources, we do not also calculate the usage stats for things like `ConfigMap`, `Secret`, etc. per quota.
This should be a significant performance gain when running large numbers of `Namespace`'s each with `ResourceQuota` that tracks a subset of resources.
/cc @deads2k @kubernetes/rh-cluster-infra
Automatic merge from submit-queue
[GarbageCollector] Let the RC manager set/remove ControllerRef
What's done:
* RC manager sets Controller Ref when creating new pods
* RC manager sets Controller Ref when adopting pods with matching labels but having no controller
* RC manager clears Controller Ref when pod labels change
* RC manager clears pods' Controller Ref when rc's selector changes
* RC manager stops adoption/creating/deleting pods when rc's DeletionTimestamp is set
* RC manager bumps up ObservedGeneration: The [original code](https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/replication/replication_controller_utils.go#L36) will do this.
* Integration tests:
* verifies that changing RC's selector or Pod's Labels triggers adoption/abandoning
* e2e tests (separated to #27151):
* verifies GC deletes the pods created by RC if DeleteOptions.OrphanDependents=false, and orphans the pods if DeleteOptions.OrphanDependents=true.
TODO:
- [x] we need to be able to select Pods that have a specific ControllerRef. Then each time we sync the RC, we will iterate through all the Pods that has a controllerRef pointing the RC, event if the labels of the Pod doesn't match the selector of RC anymore. This will prevent a Pod from stuck with a stale controllerRef, which could be caused by the race between abandoner (the goroutine that removes controllerRef) and worker the goroutine that add controllerRef to pods).
- [ ] use controllerRef instead of calling `getPodController`. This might be carried out by the control-plane team.
- [ ] according to the controllerRef proposal (#25256): "For debugging purposes we want to add an adoptionTime annotation prefixed with kubernetes.io/ which will keep the time of last controller ownership transfer." This might be carried out by the control-plane team.
cc @lavalamp @gmarek
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[garbage collector] add e2e test
This PR also includes some changes to plumb controller-manager's `--enable_garbage_collector` from the environment variable.
The e2e test will not be run by the core suite because it's marked `[Feature:GarbageCollector]`.
The corresponding jenkins job configuration PR is https://github.com/kubernetes/test-infra/pull/132.
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controller: wait for synced old replica sets on Recreate
Partially fixes https://github.com/kubernetes/kubernetes/issues/27362
Any other work on it should be handled in the replica set level (and/or kubelet if it's required)
@kubernetes/deployment PTAL
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Controllers doesn't take any actions when being deleted.
I started doing it for other controllers but it's not always clear to me how it should work. I'll be adding other ones as separate commits to this PR.
cc @caesarxuchao @lavalamp
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Add hooks for cluster health detection
Separate a function that decides if zone is healthy. First real commit for preventing massive pod eviction.
Ref. #28832
cc @davidopp
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Change storeToNodeConditionLister to return []*api.Node instead of api.NodeList for performance
Currently copies that are made while copying/creating api.NodeList are significant part of scheduler profile, and a bunch of them are made in places, that are not-parallelizable.
Ref #28590
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controller/volume: simplify sync logic in syncUnboundClaim
Remove all unnecessary branching logic. No actual logic changes. Code is more readable now.
Wait for specific final state instead of waiting for specific number of
operations in volume unit tests. The tests are more readable and will survive
random goroutine ordering (PV and PVC controller have both their own
goroutine).
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allow lock acquisition injection for quota admission
Allows for custom lock acquisition when composing the quota admission controller.
@derekwaynecarr I'm still experimenting to make sure this satisfies the need downstream, but looking for agreement in principle
Changes:
* moved waiting for synced caches before starting any work
* refactored worker() to really quit on quit
* changed queue to a ratelimiting queue and added retries on errors
* deep-copy deployments before mutating - we still need to deep-copy
replica sets and pods
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Move deployment functions to deployment/util.go not widely used
If the function is not used in multiple areas, move it to deployment/util.go
fixes#26750
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Some scheduler optimizations
Ref #28590
This PR doesn't do anything fancy - it is just reducing amount of memory allocations in scheduler, which in turn significantly speeds up scheduler.
