Automatic merge from submit-queue (batch tested with PRs 51750, 53195, 53384, 53410). 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>.
GCE: Handle missing subnet for legacy networks and auto networks with unique subnet names
Fixes#53409
/assign @bowei
Tested on three GKE clusters with automatic, manual, and legacy networks.
**Release note**:
```release-note
GCE: Fixes ILB sync on legacy networks and auto networks with unique subnet names
```
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Add ping6 option for e2e ext connectivity test for IPv6-only clusters
e2e tests provide only an (IPv4) ping test for external connectivity.
We need a way to conditionally run a ping6 external connectivity check,
and disable the (IPv4) ping-based external connectivity check,
for end-to-end testing on IPv6-only clusters.
This feature will be needed for creating gating IPv6 CI tests.
fixes#53383
**What this PR does / why we need it**:
This adds an IPv6 (ping6) version of the external connectivity ping check to the e2e test suite,
and adds "Feature:" flags for selecting whether the IPv4 or IPv6 (or both) versions
of the connectivity test should be run. We need this change to be able to use the
e2e test suite in upstream gating IPv6 CI tests on IPv6-only clusters (at least until
dual-stack operation is fully supported in Kubernetes).
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#53383
**Special notes for your reviewer**:
Please let me know if there are better tags to use for selecting IPv4 vs IPv6 testing.
**Release note**:
```release-note
NONE
```
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add http request timeout for OpenStack cloud provider
**What this PR does / why we need it**:
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#53191
**Special notes for your reviewer**:
/assign @NickrenREN @dims @FengyunPan
**Release note**:
```release-note
None
```
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outputs `<none>` for colums not found
**What this PR does / why we need it**:
outputs `<none>` for columns specified by `-o custom-columns` but not found in object
currently kubectl outputs an error of "xxx is not found" when a column is not in the returned json (omitted because of empty value or no such field in the object type at all). This PR suppress this error but outputs `<none>` at that field. This makes it convenient to output the objects details, especially when getting objects of different type in one command.
example:
```
$ kubectl get deploy,rs,po -o custom-columns=NAMESPACE:.metadata.namespace,NAME:.metadata.name,REPLICAS:.status.replicas
NAMESPACE NAME REPLICAS
default deck 1
default deck-433074128 1
default deck-433074128-vxcg9 <none>
```
**Special notes for your reviewer**:
**Release note**:
```release-note
outputs `<none>` for columns specified by `-o custom-columns` but not found in object
```
@kubernetes/kubectl-reviewers
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add --selector flag support
**Release note**:
```release-note
NONE
```
Adds --selector option to kubectl drain,cordon,uncordon, performing
each action on a list of nodes matching the given label.
If at least one node fails to be cordoned/uncordoned, the command will
continue to operate on any remaining nodes, uninterrupted, reporting
any errors it encounters along the way.
If at least one node fails to be drained, the command will halt, printing
the immediate error encountered, and a list of nodes yet to be drained
(including the node that just failed to be drained).
cc @kubernetes/sig-cli-misc @fabianofranz @soltysh
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Use pointer for PSP allow escalation
Fixes#53437
The `AllowPrivilegeEscalation` field was added to PodSpec and PodSecurityPolicySpec in 1.8.0.
In order to remain compatible with pre-1.8.0 behavior, PodSecurityPolicy objects created against a previous release must not restrict this field, which means the field must default to true in PodSecurityPolicySpec. However, the field was added as a `bool`, not a `*bool`, which means that no defaulting is possible.
We have two options:
1. Require all pre-existing PodSecurityPolicy objects that intend to allow privileged permissions to update to set this new field to true
2. Change the field to a `*bool` and default it to true.
This PR does the latter. With this change, we have the following behavior:
A 1.8.1+ client/server now has three ways to serialize:
* `nil` values are dropped from serialization (because `omitempty`), which is interpreted correctly by other 1.8.1+ clients/servers, and is interpreted as false by 1.8.0
* `false` values are serialized and interpreted correctly by all clients/servers
* `true` values are serialized and interpreted correctly by all clients/servers
A 1.8.0 client/server has two ways to serialize:
* `false` values are dropped from serialization (because `omitempty`), which is interpreted as `false` by other 1.8.0 clients/servers, but as `nil` (and therefore defaulting to true) by 1.8.1+ clients/servers
* `true` values are serialized and interpreted correctly by all clients/servers
The primary concern is the 1.8.0 server dropping the `false` value from serialization, but I consider the compatibility break with pre-1.8 behavior to be more severe, especially if we can resolve the regression in an immediate point release.
```release-note
PodSecurityPolicy: Fixes a compatibility issue that caused policies that previously allowed privileged pods to start forbidding them, due to an incorrect default value for `allowPrivilegeEscalation`. PodSecurityPolicy objects defined using a 1.8.0 client or server that intended to set `allowPrivilegeEscalation` to `false` must be reapplied after upgrading to 1.8.1.
```
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Remove ipv4 constraint of Node IPs in ipvs proxier
**What this PR does / why we need it**:
We are targeting to IPV6. So, we should remove ipv4 constraint of Node IPs in ipvs proxier.
Besides, adding some log messages.
**Which issue this PR fixes**:
xref #51866
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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kubelet: add latency metrics to network plugin manager
This PR adds latency metrics to the network plugin operations, namely `GetPodNetworkStatus()`, `SetUpPod()`, and `TearDownPod()`.
I recently had to debug and issue where a PLEG relist hang was occurring due to a hang in a CNI plugin and it would have been really nice to have these. Between the these new metrics and `docker_operations_latency_microseconds`, we will be able to account for nearly all the time consuming routines in the PLEG relist.
@derekwaynecarr @smarterclayton @eparis @vishh
```release-note
Metrics were added to network plugin to report latency of CNI operations
```
/sig node
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Bump default snap channel to 1.8/stable in juju charms
**What this PR does / why we need it**:
This updates the Juju charms to deploy Kubernetes 1.8 by default.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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moves admission.v1alpha1.NewAdmissionReview method to webhook plugin
**What this PR does / why we need it**:
this is necessary, because the webhook plugin will be moved down to apiserver.
**Release note**:
```
NONE
```
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Allow setting --concurrent-service-syncs for kube-controller-manager in GCE kube-up
**What this PR does / why we need it**:
From https://github.com/kubernetes/kubernetes/issues/52495. This PR pipes in `--concurrent-service-syncs` for kube-controller-manager in GCE kube-up so that we could explicitly configure it.
A follow up PR might be configuring it explicitly for the correctness suite. Or we may think about setting it to a higher number by default.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #NONE
**Special notes for your reviewer**:
/assign @bowei @shyamjvs
**Release note**:
```release-note
NONE
```
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Remove useless code
Signed-off-by: sakeven <jc5930@sina.cn>
**What this PR does / why we need it**:
Function checkErrWithPrefix is never used, so we can safely remove it.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```
NONE
```
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Add check for IPv6 '::' when calculating kube-proxy's node IP
kube-proxy currently checks for a bind address of 0.0.0.0 (IPv4 all-zeros)
when calculating kube-proxy's node IP, but it does not check for
an address of '::' (IPv6 all-zeros). For either of those all-zeros
addresses, the node IP should be determined based on the hostname,
rather than using the address directly.
Also added a helpful log message when the kube-proxy protocol is
determined to be IPv6.
fixes#52613
**What this PR does / why we need it**:
This PR adds a check for a bind address of IPv6 '::' (all zeros) when kube-proxy is calculating its node IP,
similar to what is done for a bind address of IPv4 0.0.0.0. For either of these all-zeros addresses,
kube-proxy should derive the node IP based on the hostname, rather than use the bind address
directly.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#52613
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Add docs for secret literal and file combinations
Adds documentation to the help for generic secret creation that specifies how to create a secret using values from both a literal and a file. Also cleans up some of the formatting.
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volunteer to help with external cloud providers
**What this PR does / why we need it**:
Looks like we have a single approver in Mike. Throwing my hat in
to help with approvals etc.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```
NONE
```
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Add required family flag for conntrack IPv6 operation
This change causes kube-proxy to supply the required "-f ipv6"
family flag whenever the conntrack utility is executed and the
associated service is using IPv6.
This change is required for IPv6-only operation.
Note that unit test coverage for the 2-line changes in
pkg/proxy/iptables/proxier.go and /pkg/proxy/ipvs/proxier.go will need
to be added after support for IPv6 service addresses is added to these
files. For pkg/proxy/iptables/proxier.go, this coverage will be added
either with PR #48551.
fixes#52027
**What this PR does / why we need it**:
Kube-proxy is currently not supplying the required "-f ipv6" family flag whenever it
calls the conntrack utility and the associated service is using an IPv6 service IP address.
This means that for IPv6-only operation, conntrack is not properly cleaning up
stale UDP connections, and this may be effecting ip6tables operation.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes # 52027
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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the feature of Flex volume API and Improved lifecycle hasnot merge v1.6
**What this PR does / why we need it**:
reopen#51580 because of rebase conflict,and remove changelog1.6
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#32543
**Special notes for your reviewer**:
cc @xiangpengzhao @zhangxiaoyu-zidif
**Release note**:
```release-note
NONE
```
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kubectl: Move utility functions to util package
**What this PR does / why we need it**:
`parseFileSource()` and `parseLiteralSource()` are utility functions.
We have a package already for utility functions, `kubectl/util/`.
Move utility functions to `kubectl/util`, capitalize function names to
export from package.
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
/sig cli
/kind cleanup
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Use `--oom-score-adj` flag for kube-proxy
**What this PR does / why we need it**:
Replace `echo -998 > /proc/$$$/oom_score_adj` with `--oom-score-adj` flag for kube-proxy.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#51083
**Special notes for your reviewer**:
/assign @justinsb @vishh
**Release note**:
```release-note
NONE
```
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GCE: Ignore notFound when deleting firewall
**What this PR does / why we need it**:
Ignores a not found error when deleting a firewall on line 220.
**Which issue this PR fixes**:
Fixes#53411
**Special notes for your reviewer**:
/assign @MrHohn
**Release note**:
```release-note
NONE
```
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fix comment
**What this PR does / why we need it**:
fix method name in comment
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
None
```
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Rename the name of event source in controller-manager
**What this PR does / why we need it**: Make the event source more obvious
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#51753
**Special notes for your reviewer**:
**Release note**:
```
NONE
```
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Add IPv6 option for e2e iPerf test
The e2e iPerf test case currently only runs in IPv4 mode.
This change adds an option to run an iPerf test in IPv6 mode (i.e. by running
iPerf with a "-V" command line flag), so that the test can be run on
IPv6-only clusters.
**What this PR does / why we need it**:
This change adds an option to run an iPerf test in IPv6 mode (i.e. by running
iPerf with a "-V" command line flag), so that the test can be run on
IPv6-only clusters. It also adds a Feature tag to the current IPv4 iPerf test
so that it can be disabled when running e2e tests on an IPv6-only cluster.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#53388
**Special notes for your reviewer**:
Please let me know if there are better "Feature:" tags to use for selecting whether to run the IPv4 vs IPv6 test case.
**Release note**:
```release-note
NONE
```
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Support field selectors for CRDs
Signed-off-by: Andy Goldstein <andy.goldstein@gmail.com>
**What this PR does / why we need it**: allow field selectors to be used with custom resources
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#51046, fixes#49424
**Special notes for your reviewer**:
**Release note**:
```release-note
Custom resources served through CustomResourceDefinition now support field selectors for `metadata.name` and `metadata.namespace`.
```
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code-generator: rewrite hack/update-codecs.sh into reusable generate-{internal,}-groups.sh
Generating everything for groups inside of an apiserver (with internal types) becomes:
```shell
generate-internal-groups.sh all "$(dirname ${BASH_SOURCE})/../../.." k8s.io/sample-apiserver/pkg/client k8s.io/sample-apiserver/pkg/apis k8s.io/sample-apiserver/pkg/apis wardle:v1alpha1
```
Generating everything for a CRD (versioned types) becomes:
```shell
generate-groups.sh all "$(dirname ${BASH_SOURCE})/../../.." k8s.io/sample-apiserver/pkg/client k8s.io/sample-apiserver/pkg/apis wardle:v1alpha1
```
This should cover the 90% percent use-case. For the other 10% this can be forked and adapted as needed.
Furthermore, we can put this into a Docker container. Then code-generator consumers can do:
```shell
$ docker run -v $GOPATH:/go k8s.io/code-generator:1.8 generate-group.sh github.com/foo/bar example:v1
```
This is only possibly only the first step towards a `code-generator` binary. For the later deeper generator changes are necessary (e.g. https://github.com/kubernetes/kubernetes/pull/53202) and hence the later is only feasible in 1.9. **This PR here in contrast, we can cherry-pick to 1.8.**
```release-note
Add generate-groups.sh and generate-internal-groups.sh to k8s.io/code-generator to easily run generators against CRD or User API Server types.
```
Fixes https://github.com/kubernetes/kubernetes/issues/48714.
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Change default --cert-dir for kubelet to a non-transient location
The default kubelet `--cert-dir` location is `/var/run/kubernetes`, which is automatically erased on reboot on many platforms. As of 1.8.0, kubelet TLS bootstrapping and cert rotation now persist files in `--cert-dir`, this should default to a non-transient location. Default it to the `pki` subfolder of the default `--root-dir` Fixes#53288
Additionally, since `kubeadm` expects a running (albeit crashlooping) kubelet prior to running `kubeadm init` or `kubeadm join`, and was using the default `--root-dir` of `/var/lib/kubelet`, it should not expect that folder to be empty as a pre-init check. Fixes https://github.com/kubernetes/kubernetes/issues/53356
```release-note
kubelet: `--cert-dir` now defaults to `/var/lib/kubelet/pki`, in order to ensure bootstrapped and rotated certificates persist beyond a reboot.
```
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add note about kubelet removed flag --api-servers
**What this PR does / why we need it**:
Adds warning about --api-servers being removed in kubelet in CHANGELOG. This is a breaking change for one of my dev clusters, I imagine others would run into it.
**Special notes for your reviewer**:
This change was made in https://github.com/kubernetes/kubernetes/pull/40050.
cc @mtaufen @liggitt @mikedanese @wojtek-t @kubernetes/sig-cluster-lifecycle-misc @kubernetes/sig-node-misc (just cc'ing the same people in the related PR)
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Fix spam of multiattach errors in event logs
We should be careful while generating multiattach errors.
We seem to be generating too many of them because old code
had minor bug.
Fixes https://github.com/kubernetes/kubernetes/issues/53214
I think that we should cherry-pick this to 1.8.
cc @kubernetes/sig-storage-pr-reviews
```release-note
Fix multi-attach error spam in logs and events
```
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Add UT for podPreset storage
**What this PR does / why we need it**:
Add UT for podPreset storage
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Release note**:
```release-note
NONE
```
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removes Authorizer and ExternalClientSet from kubeapiserver's admissi…
**What this PR does / why we need it**:
removes Authorizer and ExternalClientSet from kubeapiserver's admission initializer.
**Release note**:
```
NONE
```
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Refactor node taint conditions
**What this PR does / why we need it**:
We should use `not-ready` etc as node condition taint key.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*:
fixes#51246
**Special notes for your reviewer**:
**Release note**:
```release-note
Use `not-ready` to replace `notReady` in node condition taint keys.
```
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Rename TPR to CRD
TPR has been completely removed in 1.8. However, there are still some places which use the word "TPR".
We should rename TPR to CRD in such places to be consistent with the nomenclature.
**Release note**:
```release-note
NONE
```
/cc @sttts
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