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graduate DynamicKubeletConfig feature to beta
Everything in the https://github.com/kubernetes/features/issues/281 beta target except a few documentation-related items is complete. Docs should be done very soon, so I'm sending this PR to graduate to beta before freeze.
```release-note
The dynamic Kubelet config feature is now beta, and the DynamicKubeletConfig feature gate is on by default. In order to use dynamic Kubelet config, ensure that the Kubelet's --dynamic-config-dir option is set.
```
/cc @luxas
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fix bugs that break processing when printing errors occur in kubectl
**What this PR does / why we need it**:
The process should continue when error happens, this patch fix the problem
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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move Describer from factory
**Release note**:
```release-note
NONE
```
Moves `Describer` out of the object_mapping_factory
cc @soltysh @deads2k
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Additional test coverage for kubectl/cmd/cp
This commit adds some additional test coverage
for the kubectl cp command.
**Release note**:
```release-note
NONE
```
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Add reason message logs for non-exist Azure resources
**What this PR does / why we need it**:
In azure_wrap.go the function checkResourceExistsFromError() looks at a received error and determines it to be a ResourceNotFound if the HTTP status is http.StatusNotFound. However, the HTTP status also equals http.StatusNotFound in case of SubscriptionNotFound.
this PR adds logs to indict the real error messages for such case.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes#64220
**Special notes for your reviewer**:
**Release note**:
```release-note
Add reason message logs for non-exist Azure resources
```
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Always masquerade node-originating traffic with a service VIP source ip
**What this PR does / why we need it**:
This is a follow up to make IPVS work on systems without cluster-cidr or masquerade-all.
On these systems the best matching network / source IP to reach the service VIP is the service VIP itself - at least for the host network.
The workaround is simple: Everything originating on the host (OUTPUT nat chain) with a source IP that is the VIP should be masqueraded.
The relevant rule change is the first rule in `KUBE-SERVICES`:
```
Chain KUBE-SERVICES (2 references)
pkts bytes target prot opt in out source destination
0 0 KUBE-MARK-MASQ all -- * * 0.0.0.0/0 0.0.0.0/0 match-set KUBE-CLUSTER-IP src,dst
104 6240 KUBE-MARK-MASQ tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp match-set KUBE-NODE-PORT-TCP dst
```
The matching rule could be stricter by matching src(ip),dst(ip),dst(port) but the src ip will only be selected if the VIP should be reached.
**Which issue(s) this PR fixes**
Fixes#63241
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Check SessionAffinity for Azure load balancer
**What this PR does / why we need it**:
Currently azure load balance rule comparing is based on name which does not have affinity information. So during updating, the loadDistribution property is not updated.
This PR fixes this and adds some verbose logs for better understanding what's happening.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes#63908
**Special notes for your reviewer**:
Cherry pick to 1.10.
**Release note**:
```release-note
Fix SessionAffinity not updated issue for Azure load balancer
```
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Optimize the lock which in the RunPredicate
**What this PR does / why we need it**:
Enhance the performance of scheduler
- Change the lock in the RunPredicate from lock to rlock
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Could solve part of #63784
**Special notes for your reviewer**:
_Run benchmark test by scheduler_perf_:
`Before` BenchmarkScheduling/1000Nodes/0Pods-32 1000 11689758 ns/op
`After` BenchmarkScheduling/1000Nodes/0Pods-32 1000 5951510 ns/op
_Run integration (density) test by scheduler_perf_:
Schedule 3000 Pods On 3000 Nodes
`Before` rate 19 per second on average
`After` rate 58 per second on average
_Cpu profile test result_:
`Before` [click](https://cdn.rawgit.com/godliness/files/master/63784_before.svg)
`After` [click](https://cdn.rawgit.com/godliness/files/master/63784_after.svg)
**Release note**:
```release-note
`None`
```
/sig scheduling
/cc @misterikkit
/cc @bsalamat
/cc @ravisantoshgudimetla
/cc @resouer
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Fix typo in volume_stats.go
**What this PR does / why we need it**:
While reviewing the implementation details I came across a typo in volume_stats.go
sed/volumeStatsCollecotr/volumeStatsCollector/
**Release note**:
```release-note
NONE
```
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Add warnings about cache invalidation.
Part of https://github.com/kubernetes/kubernetes/pull/63040 is the
assumption that scheduler cache updates must happen before equivalence
cache updates for any given informer event.
The reason for this is that the equivalence cache implementation checks
the main cache for staleness while holding the equiv. cache write lock.
case 1: If an informer invalidates an equiv. cache entry before the
staleness check, then we know that the main cache update completed.
case 2: If an informer blocks trying to grab the equiv. cache lock, then
invalidation will occur right after the potentially stale update is
written.
This patch adds a note to places where we invalidate the equivalence
cache so that hopefully nobody violates this invariant.
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
/kind cleanup
/sig scheduling
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convert Duration into seconds by go library function
**What this PR does / why we need it**:
Here we try convert time.Duration into int64 seconds. I think it's better to use golang library function,
https://golang.org/pkg/time/#Duration.Round
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Do not use DeepEqual to compare slices in test.
This wraps DeepEqual with a helper that considers nil slices and empty
slices to be equal.
Scheduler code might use a nil slice or empty slice to represent an
empty list, so tests should not be sensitive to the difference. Tests
could fail because DeepEqual considers nil to be different from an empty
slice.
**What this PR does / why we need it**:
Avoid breaking tests in cases where application behavior is not changed.
**Special notes for your reviewer**:
This brittle test keeps breaking in a number of my PRs. Hoping to get this fix merged independently.
**Release note**:
```release-note
NONE
```
/sig scheduling
/kind cleanup
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Move unrelated methods from the factory to helper
**What this PR does / why we need it**:
Move unrelated methods from the factory to helper
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes#64106
**Special notes for your reviewer**:
/cc @juanvallejo
**Release note**:
```release-note
NONE
```
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Setup fsGroup for local volumes correctly
**What this PR does / why we need it**:
This pr fixes fsGroup check in local volume in containerized kubelet. Except this, it also fixes fsGroup check when volume source is a normal directory whether kubelet is running on the host or in a container.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes#61741
**Special notes for your reviewer**:
Bind mounts are detected in `/proc/mounts`, but it does not contain root of mount for bind mounts. So `mount.GetMountRefsByDev()` cannot get all references if source is a normal directory. e.g.
```
# mkdir /tmp/src /mnt/dst
# mount --bind /tmp/src /tmp/src # required by local-volume-provisioner, see https://github.com/kubernetes-incubator/external-storage/pull/499
# mount --bind /tmp/src /mnt/dst
# grep -P 'src|dst' /proc/mounts
tmpfs /tmp/src tmpfs rw,nosuid,nodev,noatime,size=4194304k 0 0
tmpfs /mnt/dst tmpfs rw,nosuid,nodev,noatime,size=4194304k 0 0
# grep -P 'src|dst' /proc/self/mountinfo
234 409 0:42 /src /tmp/src rw,nosuid,nodev,noatime shared:30 - tmpfs tmpfs rw,size=4194304k
235 24 0:42 /src /mnt/dst rw,nosuid,nodev,noatime shared:30 - tmpfs tmpfs rw,size=4194304k
```
We need to compare root of mount and device in this case.
**Release note**:
```release-note
NONE
```
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add dynamic config metrics
This PR exports config-releated metrics from the Kubelet.
The Guages for active, assigned, and last-known-good config can be used
to identify config versions and produce aggregate counts across several
nodes. The error-reporting Gauge can be used to determine whether a node
is experiencing a config-related error, and to prodouce an aggregate
count of nodes in an error state.
https://github.com/kubernetes/features/issues/281
```release-note
The Kubelet now exports metrics that report the assigned (node_config_assigned), last-known-good (node_config_last_known_good), and active (node_config_active) config sources, and a metric indicating whether the node is experiencing a config-related error (node_config_error). The config source metrics always report the value 1, and carry the node_config_name, node_config_uid, node_config_resource_version, and node_config_kubelet_key labels, which identify the config version. The error metric reports 1 if there is an error, 0 otherwise.
```
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Simplify the volume util by v1helper.
Signed-off-by: Da K. Ma <klaus1982.cn@gmail.com>
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Release note**:
```release-note
None
```
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kubectl uses its own pkg/kubectl/util/logs
kubectl uses its own logs instead of `staging/src/k8s.io/apiserver/pkg/util/logs`
**Release note**:
```release-note
NONE
```
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apiservices/status and certificatesigningrequests/status support get+update+patch
**What this PR does / why we need it**:
Fix the remaining `/status` subresources that return 405 on GET and PATCH
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
ref https://github.com/kubernetes/kubernetes/pull/63619
**Release note**:
```release-note
apiservices/status and certificatesigningrequests/status now support GET and PATCH
```
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Use apps/v1 Deployment/ReplicaSet in controller and kubectl
This updates the Deployment controller and integration/e2e tests to use apps/v1, as part of #55714.
This also requires updating any other components that use the `deployment/util` package, most notably `kubectl`. That means client versions 1.11 and above will only work with server versions 1.9 and above. This is well within our client-server version skew policy of +/-1 minor version.
However, this PR *only* updates the parts of `kubectl` that used `deployment/util`. So although kubectl now requires apps/v1, it still also depends on extensions/v1beta1. Migrating other parts of kubectl to apps/v1 is beyond the scope of this PR, which was just to change the Deployment controller and fix all the fallout.
```release-note
kubectl: This client version requires the `apps/v1` APIs, so it will not work against a cluster version older than v1.9.0. Note that kubectl only guarantees compatibility with clusters that are +/-1 minor version away.
```
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Allow env from resource with keys & updated tests
**What this PR does / why we need it**:
This change allows users to pull environment from specific keys in secrets and configmaps using the `kubectl set env` command. User can provide a list of comma-separated keys with the `--keys` flag.
This can be useful when a number of applications want to share a configuration object but don't want to pollute a resource with unused environment
Improves test coverage of set env command
**Release note**:
```
Allow kubectl set env to specify which keys to import from a resource
```
This wraps DeepEqual with a helper that considers nil slices and empty
slices to be equal.
Scheduler code might use a nil slice or empty slice to represent an
empty list, so tests should not be sensitive to the difference. Tests
could fail because DeepEqual considers nil to be different from an empty
slice.
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kubelet: Move RotateCertificates to the KubeletConfiguration struct
**What this PR does / why we need it**:
Moves `.RotateCertificates` to the `KubeletConfiguration` struct, so it can be configured via the Config file smoothly.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes https://github.com/kubernetes/kubernetes/issues/63878
Fixes https://github.com/kubernetes/kubernetes/issues/61653
**Special notes for your reviewer**:
Pretty similar to https://github.com/kubernetes/kubernetes/pull/62352
**Release note**:
```release-note
The kubelet certificate rotation feature can now be enabled via the `.RotateCertificates` field in the kubelet's config file. The `--rotate-certificates` flag is now deprecated, and will be removed in a future release.
```
@kubernetes/sig-node-pr-reviews @kubernetes/sig-cluster-lifecycle-pr-reviews
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move f.Command out of the factory
**Release note**:
```release-note
NONE
```
Moves the "f.Command" method out of factory_client_access
cc @soltysh
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Use DeleteOptions.PropagationPolicy instead of OrphanDependents (deprecated) in kubectl
**What this PR does / why we need it**:
Replaces the deprecated `DeleteOptions.OrphanDependents` deletion option with `DeleteOptions.PropagationPolicy`. It will improve the cascade deletion by using `Foreground` GC deletion instead of the old `OrphanDependents: false` which has a confusing behavior (leaves orphans if children has finalizers set).
**Which issue(s) this PR fixes**:
Fixes#59850
**Special notes for your reviewer**:
**Release note**:
```release-note
Use DeleteOptions.PropagationPolicy instead of OrphanDependents in kubectl
```
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add block device support for azure disk
**What this PR does / why we need it**:
add block device support for azure disk
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes#61821
**Special notes for your reviewer**:
detailed steps about how it work:
https://github.com/andyzhangx/demo/tree/master/linux/block/azuredisk
**Release note**:
```
add block device support for azure disk
```
@karataliu @feiskyer @khenidak
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Return attach error to A/D controller.
The plugin should not wait with errors for WaitForAttach, WaitForAttach runs on nodes, not in A/D controller.
**Which issue(s) this PR fixes**
Fixes#63300
~~Work in progress, missing testing.~~
**Release note**:
```release-note
NONE
```
/sig storage
@saad-ali @vladimirvivien
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When creating ext3/ext4 volume, disable reserved blocks
**What this PR does / why we need it**:
When creating ext3/ext4 volume, `mkfs` defaults to reserving 5% of the volume for the super-user (root). This patch changes the `mkfs` to pass `-m0` to disable this setting.
Rationale: Reserving a percentage of the volume is generally a neither useful nor desirable feature for volumes that aren't used as root file systems for Linux distributions, since the reserved portion becomes unavailable for non-root users. For containers, the general case is to use the entire volume for data, without running as root. The case where one might want reserved blocks enabled is much rarer.
**Special notes for your reviewer**:
I also added some comments to describe the flags passed to `mkfs`.
**Release note**:
```release-note
Changes ext3/ext4 volume creation to not reserve any portion of the volume for the root user.
```
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Fix iSCSI and RBD UnmountDevice with mount containers.
Google's [configure-helper.sh](https://github.com/kubernetes/kubernetes/blob/master/cluster/gce/gci/configure-helper.sh) script bind-mounts `/var/lib/kubelet` somewhere into `/home/kubernetes` and thus every mount that Kubernetes does is visible **twice** in `/proc/mounts`.
iSCSI and RBD volume plugins should not rely on counting entries in `/proc/mounts` and unmount device when Kubernetes thinks it's unusued. Kubernetes tracks the mounts by itself and most of other volume plugins already rely on it safely.
/sig storage
Fixes#56704
(well, it does not fix it, but it makes Kubernetes working with double mounts)
**Release note**:
```release-note
NONE
```
@rootfs, PTAL
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Remove some completed TODOs
This PR removes some old TODOs that were recently completed.
```release-note
NONE
```
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remove unused code of (pkg/scheduler)
**What this PR does / why we need it**:
/kind cleanup
remove unused code
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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split the generic component config and options into a kube and cloud part
**What this PR does / why we need it**:
Summary ideas:
1. Moving some substruct shared by both `kube-controller manager` and `cloud-controller manager` in `KubeControllerManagerConfiguration` struct into `GenericControllerManagerConfiguration` struct, and keep `KubeControllerManagerConfiguration` struct;
2. Construct a new `CloudControllerManagerConfiguration` struct for `cloud-controller manager`.
As an follow-up of [https://github.com/kubernetes/kubernetes/pull/60270](https://github.com/kubernetes/kubernetes/pull/60270).
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
Maciej Szulik
