Fix broken warning image link in docs

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Fix 'make test-e2e-node' example to run some tests

This PR fixes the minor problem that if you take the first example given in the Makefile and paste it verbatim,

    make test-e2e-node FOCUS=kubelet SKIP=container

it says something like "Will run 0 of 34 specs".  Several of the test suite descriptions contain "Kubernetes" with a capital K, but none match with a lower-case k.

The second part of the line is not great either, since some tests use "container" and some use "Container",   but fixing that seems to require some standardisation on how you name the tests.

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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`

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Fix working_set calculation in kubelet

Bump cadvisor dependencies to latest head.

Fixes #28619

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ImagePuller refactoring

A plain refactoring
- Moving image pullers to a new pkg/kubelet/images directory
- Hiding image pullers inside the new ImageManager 

The next step is to consolidate the logic of the serialized and the parallel image pullers inside ImageManager

xref: #25577

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Fix node e2e (kubelet metrics) panic

On systems (rhel7, and fedora 24), the kubelet metrics node e2e panics:

```
[k8s.io] Kubelet metrics api when querying /stats/summary
  it should report resource usage through the stats api
  /root/upstream-code/gocode/src/k8s.io/kubernetes/test/e2e_node/kubelet_test.go:146
[BeforeEach] [k8s.io] Kubelet
  /root/upstream-code/gocode/src/k8s.io/kubernetes/test/e2e/framework/framework.go:132
STEP: Creating a kubernetes client
STEP: Building a namespace api object
Jul 18 10:45:45.004: INFO: Skipping waiting for service account
[It] it should report resource usage through the stats api
  /root/upstream-code/gocode/src/k8s.io/kubernetes/test/e2e_node/kubelet_test.go:146
W0718 10:45:45.036201   17112 request.go:347] Field selector: v1 - pods - metadata.name - stats-busybox-4edb73ec-4cf6-11e6-9ecc-52540041b7801: need to check if this is versioned correctly.
W0718 10:45:45.036213   17112 request.go:347] Field selector: v1 - pods - metadata.name - stats-busybox-4edb73ec-4cf6-11e6-9ecc-52540041b7800: need to check if this is versioned correctly.
E0718 10:50:45.036630   17112 streamwatcher.go:109] Unable to decode an event from the watch stream: net/http: request canceled (Client.Timeout exceeded while reading body)
Jul 18 10:50:45.036: INFO: Unexpected error occurred: timed out waiting for the condition
panic:
Your test failed.
Ginkgo panics to prevent subsequent assertions from running.
Normally Ginkgo rescues this panic so you shouldn't see it.

But, if you make an assertion in a goroutine, Ginkgo can't capture the panic.
To circumvent this, you should call

        defer GinkgoRecover()

at the top of the goroutine that caused this panic.


goroutine 68 [running]:
panic(0x1958fc0, 0xc8204ba6b0)
        /usr/lib/golang/src/runtime/panic.go:481 +0x3e6
k8s.io/kubernetes/vendor/github.com/onsi/ginkgo.Fail(0xc820302160, 0xb0, 0xc8204ba2c8, 0x1, 0x1)
        /root/upstream-code/gocode/src/k8s.io/kubernetes/vendor/github.com/onsi/ginkgo/ginkgo_dsl.go:244 +0x116
k8s.io/kubernetes/vendor/github.com/onsi/gomega/internal/assertion.(*Assertion).match(0xc820820080, 0x2b2337d20268, 0x30a2da8, 0x0, 0x0, 0x0, 0x0, 0x30a2da8)
        /root/upstream-code/gocode/src/k8s.io/kubernetes/vendor/github.com/onsi/gomega/internal/assertion/assertion.go:69 +0x32d
k8s.io/kubernetes/vendor/github.com/onsi/gomega/internal/assertion.(*Assertion).NotTo(0xc820820080, 0x2b2337d20268, 0x30a2da8, 0x0, 0x0, 0x0, 0x2b2337d20220)
        /root/upstream-code/gocode/src/k8s.io/kubernetes/vendor/github.com/onsi/gomega/internal/assertion/assertion.go:43 +0x92
k8s.io/kubernetes/test/e2e/framework.ExpectNoError(0x2b2336968028, 0xc8200b30c0, 0x0, 0x0, 0x0)
        /root/upstream-code/gocode/src/k8s.io/kubernetes/test/e2e/framework/util.go:1811 +0x203
k8s.io/kubernetes/test/e2e/framework.(*Framework).CreatePods.func1(0xc8200a6540, 0xc820204f40, 0x33, 0xc8201576c0)
        /root/upstream-code/gocode/src/k8s.io/kubernetes/test/e2e/framework/pods.go:68 +0x68
created by k8s.io/kubernetes/test/e2e/framework.(*Framework).CreatePods
        /root/upstream-code/gocode/src/k8s.io/kubernetes/test/e2e/framework/pods.go:70 +0x213

Ginkgo ran 1 suite in 5m20.524270699s
Test Suite Failed
!!! Error in hack/make-rules/test-e2e-node.sh:132
  '"${ginkgo}" --focus=$focus --skip=$skip "${KUBE_ROOT}/test/e2e_node/" --report-dir=${report} -- --alsologtostderr --v 2 --node-name $(hostname) --disable-kubenet=true --build-services=true --start-services=true --stop-services=true "$test_args"' exited with status 1
Call stack:
  1: hack/make-rules/test-e2e-node.sh:132 main(...)
Exiting with status 1
make: *** [test-e2e-node] Error 1
```

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Kubelet: Set PruneChildren when removing image.

This is a bug introduced during switching to engine-api. https://github.com/kubernetes/kubernetes/issues/23563.

When removing image, there is an option `noprune`:
```
If prune is true, ancestor images will each attempt to be deleted quietly.
```

In go-dockerclient, the default value of the option is ["noprune=false"](https://github.com/fsouza/go-dockerclient/blob/master/image.go#L171), which means that ancestor images should be also removed. This is the expected behaviour.

However in engine-api, the option is changed to `PruneChildren`, and the default value is `PruneChildren=false`, which means that ancestor images won't be removed.
This makes `ImageRemove` only remove the first layer of the image, which causes the image garbage collection not working as expected.

This should be fixed in 1.3.
And thanks to @ronnielai for finding the bug! :)

/cc @kubernetes/sig-node 

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docker_manager: Correct determineContainerIP args

This could result in the network plugin not retrieving the pod ip in a
call to SyncPod when using the `exec` network plugin.
The CNI and kubenet network plugins ignore the name/namespace arguments,
so they are not impacted by this bug.

I verified the second included test failed prior to correcting the
argument order.

Fixes #29161 

cc @yujuhong 

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pkg/probe/http: don't compare error strings in tests

TestHTTPProbeChecker fails on the Go1.7 release candidates. The
package's history show that this was the case for Go1.5 and Go1.6
as well.

The test depend on errors holding specific string values, behavior
not guarenteed in the standard library API, and causing new test
failures every minor Go release. Just look for an error rather than
trying to inspect it using string comparison. If we feel this
impacts coverage we can add more test cases.

Fixes #15952

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Add defer

Add defer？

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Fix RBAC authorizer of ServiceAccount

RBAC authorizer assigns a role to a wrong service account.

How to reproduce

1.Create role and rolebinding to allow default user in kube-system namespace to read secrets in kube-system namespace.

```
# kubectl create -f role.yaml
# kubectl create -f binding.yaml
```

```yaml
# role.yaml
kind: Role
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: secret-reader
  namespace: kube-system
rules:
  - apiGroups: [""]
    resources: ["secrets"]
    verbs: ["get", "watch", "list"]
    nonResourceURLs: []
```

```yaml
# binding.yaml
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: read-secrets
  namespace: kube-system
subjects:
  - kind: ServiceAccount
    name: default
    namespace: kube-system
roleRef:
  kind: Role
  namespace: kube-system
  name: secret-reader
  apiVersion: rbac.authorization.k8s.io/v1alpha1
```

2.Set a credential of default user

```
$ kubectl config set-credentials default_user --token=<token_of_system:serviceaccount:kube-system:default>
$ kubectl config set-context default_user-context --cluster=test-cluster --user=default_user
$ kubectl config use-context default_user-context
```

3.Try to get secrets as default user in kube-system namespace

```
$ kubectl --namespace=kube-system get secrets
the server does not allow access to the requested resource (get secrets)
```

As shown above, default user could not access to secrets.
But if I have kube-system user in default namespace, it is allowed access to secrets.


4.Create a service account and try to get secrets as kube-system user in default namespace

```
# kubectl --namespace=default create serviceaccount kube-system
serviceaccount "kube-system" created
$ kubectl config set-credentials kube-system_user --token=<token_of_system:serviceaccount:default:kube-system>
$ kubectl config set-context kube-system_user-context --cluster=test-cluster --user=kube-system_user
$ kubectl config use-context kube-system_user-context
$ kubectl --namespace=kube-system get secrets
NAME                  TYPE                                  DATA      AGE
default-token-8pyb3   kubernetes.io/service-account-token   3         4d

```

Signed-off-by: Vishnu kannan <vishnuk@google.com>

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Information is opposite to real meaning to express

master is not equal to expectedMaster, the meaning should be the master is unexpected:
	master, err := mesosCloud.Master(clusterName)
	if master != expectedMaster {
		t.Fatalf("Master returns the expected value: (expected: %#v, actual: %#v", expectedMaster, master)

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Modify err output format from %s to %v

t.Errorf err output format should be %v

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format number not consistent with real variable number

glog.Infof format number not consistent with real variable number， should add %s for second var because loadBalancerName is string:
func (c *Cloud) ensureLoadBalancer(namespacedName types.NamespacedName, loadBalancerName string, ...

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"server.go" directory error

In file "docs\devel\profiling.md", line 55:
"In 'pkg/master/server/server.go' more servers are created“
Here server.go directory is wrong, should be :pkg/kubelet/server/server.go

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Fix wrong variable of error

Should not log `err` but `cerr`.

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Proposal for ControllerReference

Proposal for including the reference pointing to the owning "collection" (controller) for objects that can be grouped. The goal is to prevent a situation when two controllers are fighting over some resources.

cc @bgrant0607 @lavalamp @caesarxuchao @davidopp @fgrzadkowski @wojtek-t @kubernetes/sig-api-machinery

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Warn when missing cloud-provider on kube controller

to avoid panic

Signed-off-by: Vishnu kannan <vishnuk@google.com>

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Allow handlers earlier in a request flow to inject a UID for an object

This lets admission controllers specify a stable UID for an object prior to its creation.  That lets the admission controller then record a reference to the object on another resource using that stable UID prior to the object being created.  This would be a prerequisite for supporting quota reservations.

/cc @smarterclayton @lavalamp @deads2k 

RBAC authorizer assigns a role to a wrong service account.

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Start namespace controller in node e2e

Fix https://github.com/kubernetes/kubernetes/issues/28320.
Based on https://github.com/kubernetes/kubernetes/pull/28807, only the last 2 commits are new.

Before this PR, there was no namespace controller running in node e2e test infrastructure. We can not enable the [`delete-namespace`](https://github.com/kubernetes/kubernetes/blob/f2ddd60eb9e7e9e29f7a105a9a8fa020042e8e52/test/e2e/framework/test_context.go#L109) flag in the test framework.
So after the test running, there will be running pod left on the test node. This seems to be acceptable in our test infrastructure because we create an new instance each time.

However, in 1.4 we may want to provide part of the test as node conformance test to the user, they definitely don't want the test to leave tons of pods on their node after test running.

Currently, there is no easy way to only start namespace controller in kube-controller-manager (confirmed with @mikedanese), so in this PR I started a "uncontainerized" one in the test infrastructure.

This PR:
* Started the namespace controller in the node e2e test infrastructure and enable the automatic namespace deletion.
* Change the privileged test to use framework (@yujuhong), so that all node e2e tests are using the framework and test pods will be cleaned up by namespace controller.

/cc @kubernetes/sig-node 

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Make a link in docs clickable

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Info about enabling the hostpath provisioner

The README for persistent volume provisioning had information about the
hostpath provisioner for testing purposes, but lacked instructions on
how to enable it.

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Revert "Follow on for 1.4 to default HTTP2 on by default"

This reverts commit efe25553  
in order to address: #29001 #28537

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Fix generic scheduler test

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Fix a typo

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Bump the default etcd version in the Makefile to 3.0.3

Fixes: #29132

I haven't had time to manually validate the arm and arm64 version yet, but I think it should be fine.

cc @xiang90 @hongchaodeng @timothysc @lavalamp @wojtek-t @thockin @kubernetes/sig-scalability @Pensu @laboger

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Add proposal for service externalName

This is a proposal to address: #13748.

@smarterclayton @ncdc @thockin.  Please check this out when you have time, hopefully this is okay :-D

I created the proposal because was unsure if the feature would be able to go in if there isn't a proposal already merged, because of this mail to kubernetes-pm: https://groups.google.com/forum/#!topic/kubernetes-pm/Ki63EztfZMo.

So, IIUC it would be nice to have the proposal merged ASAP (I think the interface looks ok for all, so hopefully this will be easy) so we can have this feature in 1.4 as you guys ( @smarterclayton @ncdc ) need.

This reverts commit efe25553.

- Github flavored markdown doesn't support links inside codeblocks

Revert "Add and delete load balancer in front of apiserver."