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Enable HPA controller based on autoscaling/v1 api group
ref #29778
``` release-note
Enable HPA controller based on autoscaling/v1 api group.
```
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lister-gen updates
- Remove "zz_generated." prefix from generated lister file names
- Add support for expansion interfaces
- Switch to new generated JobLister
@deads2k @liggitt @sttts @mikedanese @caesarxuchao for the lister-gen changes
@soltysh @deads2k for the informer / job controller changes
Automatic merge from submit-queue
convert SA controller to shared informers
convert the SA controller to shared informer + workqueue.
I think one of @derekwaynecarr @ncdc or @liggitt
Alter how runtime.SerializeInfo is represented to simplify negotiation
and reduce the need to allocate during negotiation. Simplify the dynamic
client's logic around negotiating type. Add more tests for media type
handling where necessary.
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Abstraction of endpoints in leaderelection code
**Problem Statement**:
Currently the Leader Election code is hard coded against the endpoints api. This causes performance issues on large scale clusters due to incessant iptables refreshes, see: https://github.com/kubernetes/kubernetes/issues/26637
The goal of this PR is to:
- Abstract Endpoints out of the leader election code
- Fix a known bug in the event recording
fixes#18386
**Special notes for your reviewer**:
This is a 1st pass at abstracting the details of endpoints out into an interface. Any suggestions around how we we want to refactor this interface is welcome and could be addressed in either this PR or follow on PR.
/cc @ncdc @wojtek-t @rrati
persistentvolumecontroller.NewPersistentVolumeController has 11 arguments now,
put them into a structure.
Also, rename NewPersistentVolumeController to NewController, persistentvolume
is already name of the package.
Fixes#30219
The GC needs to build clients based only on Resource or Kind. Hoist the
restmapper out of the controller and the clientpool, support a new
ClientForGroupVersionKind and ClientForGroupVersionResource, and use the
appropriate one in both places.
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convert daemonset controller to shared informers
Convert the daemonset controller completely to `SharedInformers` for its list/watch resources.
@kubernetes/rh-cluster-infra @ncdc
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Switch ScheduledJob controller to use clientset
**What this PR does / why we need it**:
This is part of #25442. I've applied here the same fix I've applied in the manual client in #29187, see the 1st commit for that (@caesarxuchao we've talked about it in #29856).
@deads2k as promised
@janetkuo ptal
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Use PV shared informer in PV controller
Use the PV shared informer, addressing (partially) https://github.com/kubernetes/kubernetes/issues/26247 . Using the PVC shared informer is not so simple because sometimes the controller wants to `Requeue` and...
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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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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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add configz.InstallHandler in controllermanager.go
I think it should add configz.InstallHandler for Run function in controllermanager.go.
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two optimization for StartControllers in controllermanager.go
The PR changed two places to optimise StartControllers function in controllermanager.go.
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controller-manager support number of garbage collector workers to be configurable
The number of garbage collector workers of controller-manager is a fixed value 5 now, make it configurable should more properly
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kube-controller-manager: Add configure-cloud-routes option
This allows kube-controller-manager to allocate CIDRs to nodes (with
allocate-node-cidrs=true), but will not try to configure them on the
cloud provider, even if the cloud provider supports Routes.
The default is configure-cloud-routes=true, and it will only try to
configure routes if allocate-node-cidrs is also configured, so the
default behaviour is unchanged.
This is useful because on AWS the cloud provider configures routes by
setting up VPC routing table entries, but there is a limit of 50
entries. So setting configure-cloud-routes on AWS would allow us to
continue to allocate node CIDRs as today, but replace the VPC
route-table mechanism with something not limited to 50 nodes.
We can't just turn off the cloud-provider entirely because it also
controls other things - node discovery, load balancer creation etc.
Fix#25602
This allows kube-controller-manager to allocate CIDRs to nodes (with
allocate-node-cidrs=true), but will not try to configure them on the
cloud provider, even if the cloud provider supports Routes.
The default is configure-cloud-routes=true, and it will only try to
configure routes if allocate-node-cidrs is also configured, so the
default behaviour is unchanged.
This is useful because on AWS the cloud provider configures routes by
setting up VPC routing table entries, but there is a limit of 50
entries. So setting configure-cloud-routes on AWS would allow us to
continue to allocate node CIDRs as today, but replace the VPC
route-table mechanism with something not limited to 50 nodes.
We can't just turn off the cloud-provider entirely because it also
controls other things - node discovery, load balancer creation etc.
Fix#25602
Split controller cache into actual and desired state of world.
Controller will only operate on volumes scheduled to nodes that
have the "volumes.kubernetes.io/controller-managed-attach" annotation.
Automatic merge from submit-queue
Refactor persistent volume controller
Here is complete persistent controller as designed in https://github.com/pmorie/pv-haxxz/blob/master/controller.go
It's feature complete and compatible with current binder/recycler/provisioner. No new features, it *should* be much more stable and predictable.
Testing
--
The unit test framework is quite complicated, still it was necessary to reach reasonable coverage (78% in `persistentvolume_controller.go`). The untested part are error cases, which are quite hard to test in reasonable way - sure, I can inject a VersionConflictError on any object update and check the error bubbles up to appropriate places, but the real test would be to run `syncClaim`/`syncVolume` again and check it recovers appropriately from the error in the next periodic sync. That's the hard part.
Organization
---
The PR starts with `rm -rf kubernetes/pkg/controller/persistentvolume`. I find it easier to read when I see only the new controller without old pieces scattered around.
[`types.go` from the old controller is reused to speed up matching a bit, the code looks solid and has 95% unit test coverage].
I tried to split the PR into smaller patches, let me know what you think.
~~TODO~~
--
* ~~Missing: provisioning, recycling~~.
* ~~Fix integration tests~~
* ~~Fix e2e tests~~
@kubernetes/sig-storage
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Fixes#15632
Automatic merge from submit-queue
update controllers watching all pods to share an informer
This plumbs the shared pod informer through the various controllers to avoid duplicated watches.
Volume names have now format <cluster-name>-dynamic-<pv-name>.
pv-name is guaranteed to be unique in Kubernetes cluster, adding
<cluster-name> ensures we don't conflict with any running cluster
in the cloud project (kube-controller-manager --cluster-name=XXX).
'kubernetes' is the default cluster name.
I can't revert with github which says "Sorry, this pull request couldn’t be
reverted automatically. It may have already been reverted, or the content may
have changed since it was merged."
Reverts commit: 0c191e787b
Recycle controller tries to recycle or delete a PV several times.
It stores count of failed attempts and timestamp of the last attempt in
annotations of the PV.
By default, the controller tries to recycle/delete a PV 3 times in
10 minutes interval. These values are configurable by
kube-controller-manager --pv-recycler-maximum-retry=X --pvclaimbinder-sync-period=Y
arguments.
Public utility methods and JWT parsing, and controller specific logic.
Also remove the coupling between ServiceAccountTokenGetter and the
authenticator class.
The HPA controller had previously used a single Client
object to act as three different Namespacers. To improve
ease of extensibility and to make it clearer what the HPA
controller actually needs to use from the client, it should
use separate Namespacers for each of its needs (Scales, HPAs,
and Events).
This commit makes the HPA metrics client configurable in where
it looks for heapster instead of hard coding it to
"kube-system/heapster". The values of "kube-system/heapster"
are still recorded as constants in the metrics client package
for use as default values.
Default to hardcodes for components that had them, and 5.0 qps, 10 burst
for those that relied on client defaults
Unclear if maybe it'd be better to just assume these are set as part of
the incoming kubeconfig. For now just exposing them as flags since it's
easier for me to manually tweak.
Since pflag can handle net.IPNet arguements use that code. This means
that our code no longer has casts back and forth and just natively uses
net.IPNet.
pflag can handle IP addresses so use the pflag code instead of doing it
ourselves. This means our code just uses net.IP and we don't have all of
the useless casting back and forth!
Currently setting the `--allocate-node-cidrs` flag to true with an
empty cloud provider causes the kube-controller-manager to crash during
startup.
Fix the issue by checking for an empty cloud provider before setting
up route management on the cloud provider. This change introduces a
change in behavior. The kube-controller-manager now supports allocating
pod CIDRs without a cloud provider. This means users must manage routes
through some other mechanism.
The controller manager logs a warning if `--allocate-node-cidrs` is set,
but not a cloud provider:
```
I0725 17:10:41.587888 43185 plugins.go:70] No cloud provider specified.
I0725 17:10:41.588036 43185 nodecontroller.go:114] Sending events to api server.
E0725 17:10:41.588122 43185 controllermanager.go:201] Failed to start service controller: ServiceController should not be run without a cloudprovider.
W0725 17:10:41.588136 43185 controllermanager.go:213] allocate-node-cidrs is set, but no cloud provider specified. Will not manage routes.
E0725 17:10:41.589703 43185 nodecontroller.go:187] Error monitoring node status: Get http://127.0.0.1:8080/api/v1/nodes: dial tcp 127.0.0.1
```
Fixes#11866
This should ensure all load balancers get deleted even if a reordering of
watch events causes us to strand one after its service has been deleted,
because the sync will notice that the service controller's cache has a
service in it that no longer exists in the apiserver.
It could still leak in the case that the controller manager is killed
between when it leaks something and the sync runs, but this should
improve things.
--node-milli-cpu
--node-memory
--machines
--minion-regexp
--sync-nodes
Remove the following flags from the standalon kubernetes binary:
--node-milli-cpu
--node-memory
- Delete nodes when they are no longer ready and don't exist in the
cloud provider.
- Label each node with it's hostname.
- Add flag to skip node registration.
- Add a test for registering an existing node.
--master option still supported.
--kubeconfig option added to kube-proxy,
kube-scheduler, and kube-controller-manager
binaries.
Kube-proxy now always makes some kind of API
source, since that is its only kind of config.
Warn if it is using a default client, which probably won't work.
Uses the clientcmd builder.
external load balancers up-to-date based on the service's specs, using
the new DeltaFIFO watch queue class. Remove the old registry REST
handler code for creating/updating/deleting load balancers.
Also clean up a bunch of the GCE cloudprovider code related to load balancers.
It currently is impossible to use two healthz handlers on different
ports in the same process. This removes the global variables in favor
of requiring the consumer to specify all health checks up front.
