The goal of this change is to remove the registration of signal
handling from pkg/kubelet. We now pass in a stop channel.
If you register a signal handler in `main()` to aid in a controlled
and deliberate exit then the handler registered in `pkg/kubelet` often
wins and the process exits immediately. This means all other signal
handler registrations are currently racy if `DockerServer.Start()` is
directly or indirectly invoked.
This change also removes another signal handler registration from
`NewAPIServerCommand()`; a stop channel is now passed to this
function.
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Dump Stack when docker fails on healthcheck
Save stack dump of docker daemon in order to be able to
investigate why docker daemon was unresposive to `docker ps`
See https://github.com/moby/moby/blob/master/daemon/daemon.go on
how docker sets up a trap for SIGUSR1 with `setupDumpStackTrap()`
**What this PR does / why we need it**:
This allows us to investigate why docker daemon was unresponsive to "docker ps" command.
**Special notes for your reviewer**:
Manually tested on Ubuntu and COS.
**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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re-reorder authorizers (RBAC before Webhook).
Sort of reverts #57426
We aren't relying on the ordering for anything, and it's not worth the additional latency/traffic at this point.
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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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Fix documentation of GA is in APIService's PriorityVersion and CRD's Versions
Explain what GA is in APIService's PriorityVersion and CRD's Versions.
ref #64136
```release-note
NONE
```
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kubeadm: Refactor the .Etcd substruct in the v1alpha2 API
**What this PR does / why we need it**:
Splits the monolithic `.Etcd` struct with all the options as fields to a more modular and clear design with two sub-structs for the different modes of hosting etcd we support.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Part of kubernetes/community#2131
**Special notes for your reviewer**:
Depends on:
- [x] https://github.com/kubernetes/kubernetes/pull/63917
Follows up: https://github.com/kubernetes/kubernetes/pull/63871
TODO: I still need to write unit tests for this.
**Release note**:
```release-note
[action required] kubeadm: The `:Etcd` struct has been refactored in the v1alpha2 API. All the options now reside under either `.Etcd.Local` or `.Etcd.External`. Automatic conversions from the v1alpha1 API are supported.
```
@kubernetes/sig-cluster-lifecycle-pr-reviews @liztio
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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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Moving Regional PD e2e tests to regular test suites
**What this PR does / why we need it**: Regional PD e2e tests previously only run on alpha suites. Need to move them to the regular test suites
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Part of #59988
**Special notes for your reviewer**: Will be cherry-picked to 1.10 once merged.
**Release note**:
```release-note
NONE
```
/sig gcp
/sig storage
/assign @msau42 @saad-ali
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Extend dns configmap tests to include CoreDNS
**What this PR does / why we need it**:
This PR extends the DNS configmap e2e tests to include testing the CoreDNS ConfigMap.
The tests now test the equivalent `stubdomain`, `federation` and `upstreamnameserver` configuration of kube-dns for CoreDNS, when CoreDNS is the installed DNS server.
**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#62865
**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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Refactor test utils that deal with Kubelet metrics for clarity
I found these functions hard to understand, because the names did not
accurately reflect their behavior. For example, GetKubeletMetrics
assumed that all of the metrics passed in were measuring latency.
The caller of GetKubeletMetrics was implicitly making this assumption,
but it was not obvious at the call site.
```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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Handle TERM signal to reduce pod terminating time.
**What this PR does / why we need it**:
Register signal handler for `TERM`.
For container, process is run as PID 1. PID 1 is special in linux, it ignore any signal with the default action. So process will not terminate on `SIGINT` or `SIGTERM` unless it is coded to do so.
By default, docker use `TERM` signal to termiante pods, it will wait 10 seconds before sending `KILL` signal.
```
$ docker run -d --rm --name test busybox sh -c 'while true; do sleep 1; done'
aa827df5d7bfffc5ca4fae2429d0b761a5a142c57ba3e1faa59b305c92f1c875
$ time docker stop test
test
real 0m10.408s
user 0m0.048s
sys 0m0.020s
```
It's better to register a exit handler for `TERM`, it reduces a lot of time in waiting pods to termiante.
```
$ docker run -d --rm --name test busybox sh -c 'trap exit TERM; while true; do sleep 1; done'
e331bff454dba8e45df6065c3bd2a928e1c41303aafdf88ede38def3e4e5781f
$ time docker stop test
test
real 0m0.690s
user 0m0.048s
sys 0m0.020s
```
**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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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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kubeadm: crictl reset commands fixes
Signed-off-by: Antonio Murdaca <runcom@redhat.com>
**What this PR does / why we need it**:
change container stop/rm commands with sandbox stop/rm to properly reset using kubeadm
**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/kubeadm/issues/748
**Special notes for your reviewer**:
**Release note**:
```release-note
Correct the way we reset containers and pods in kubeadm via crictl
```
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Use default seccomp profile for unprivileged addons
**What this PR does / why we need it**:
This PR sets the default seccomp profile of unprivileged addons to 'docker/default'. This PR is a followup of [#62662](https://github.com/kubernetes/kubernetes/pull/62662) and [#62671](https://github.com/kubernetes/kubernetes/pull/62671). We are using 'docker/default' instead of 'runtime/default' in addons in order to handle node version skew. When seccomp profile is applied automatically by default later, we can remove those annotations.
**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#39845
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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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.
Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
add missing flag for command
**What this PR does / why we need it**:
add missing flag for `kubeadm config images pull` command
**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**:
/assign @luxas
/cc @chuckha
**Release note**:
```release-note
NONE
```
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smaller code clean for cloud-controller manager
**What this PR does / why we need it**:
As PR [https://github.com/kubernetes/kubernetes/pull/63283](https://github.com/kubernetes/kubernetes/pull/63283) nits, do some code clean for `cloud-controller manager`.
**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**:
/assign @luxas
**Release note**:
```release-note
NONE
```
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log bad format git version
**What this PR does / why we need it**:
This PR will log git version when its format is bad. This will be helpful for debug.
**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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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
```
