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Merge pull request #46254 from mtaufen/dkcfg

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Automatic merge from submit-queue (batch tested with PRs 50016, 49583, 49930, 46254, 50337)

Alpha Dynamic Kubelet Configuration

Feature: https://github.com/kubernetes/features/issues/281

This proposal contains the alpha implementation of the Dynamic Kubelet Configuration feature proposed in ~#29459~ [community/contributors/design-proposals/dynamic-kubelet-configuration.md](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/dynamic-kubelet-configuration.md). 

Please note:
- ~The proposal doc is not yet up to date with this implementation, there are some subtle differences and some more significant ones. I will update the proposal doc to match by tomorrow afternoon.~
- ~This obviously needs more tests. I plan to write several O(soon). Since it's alpha and feature-gated, I'm decoupling this review from the review of the tests.~ I've beefed up the unit tests, though there is still plenty of testing to be done.
- ~I'm temporarily holding off on updating the generated docs, api specs, etc, for the sake of my reviewers 😄~ these files now live in a separate commit; the first commit is the one to review.

/cc @dchen1107 @vishh @bgrant0607 @thockin @derekwaynecarr 

```release-note
Adds (alpha feature) the ability to dynamically configure Kubelets by enabling the DynamicKubeletConfig feature gate, posting a ConfigMap to the API server, and setting the spec.configSource field on Node objects. See the proposal at https://github.com/kubernetes/community/blob/master/contributors/design-proposals/dynamic-kubelet-configuration.md for details.
```
This commit is contained in:
Kubernetes Submit Queue
2017-08-09 14:14:32 -07:00
committed by GitHub
parent 212928ad14 378544362c
commit 458cc04330
98 changed files with 8194 additions and 1713 deletions
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140
docs/api-reference/v1/definitions.html
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@@ -403,6 +403,9 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
<p><a href="#_v1_node">v1.Node</a></p>
</li>
<li>
<p><a href="#_v1_nodeconfigsource">v1.NodeConfigSource</a></p>
</li>
<li>
<p><a href="#_v1_nodelist">v1.NodeList</a></p>
</li>
<li>
@@ -3187,6 +3190,47 @@ When an object is created, the system will populate this list with the current s
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1_persistentvolumeclaimvolumesource">v1.PersistentVolumeClaimVolumeSource</h3>
<div class="paragraph">
<p>PersistentVolumeClaimVolumeSource references the user&#8217;s PVC in the same namespace. This volume finds the bound PV and mounts that volume for the pod. A PersistentVolumeClaimVolumeSource is, essentially, a wrapper around another type of volume that is owned by someone else (the system).</p>
</div>
<table class="tableblock frame-all grid-all" style="width:100%; ">
<colgroup>
<col style="width:20%;">
<col style="width:20%;">
<col style="width:20%;">
<col style="width:20%;">
<col style="width:20%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Name</th>
<th class="tableblock halign-left valign-top">Description</th>
<th class="tableblock halign-left valign-top">Required</th>
<th class="tableblock halign-left valign-top">Schema</th>
<th class="tableblock halign-left valign-top">Default</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">claimName</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">ClaimName is the name of a PersistentVolumeClaim in the same namespace as the pod using this volume. More info: <a href="https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims">https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">string</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">readOnly</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Will force the ReadOnly setting in VolumeMounts. Default false.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">boolean</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1_nodeaddress">v1.NodeAddress</h3>
@@ -3372,47 +3416,6 @@ When an object is created, the system will populate this list with the current s
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1_persistentvolumeclaimvolumesource">v1.PersistentVolumeClaimVolumeSource</h3>
<div class="paragraph">
<p>PersistentVolumeClaimVolumeSource references the user&#8217;s PVC in the same namespace. This volume finds the bound PV and mounts that volume for the pod. A PersistentVolumeClaimVolumeSource is, essentially, a wrapper around another type of volume that is owned by someone else (the system).</p>
</div>
<table class="tableblock frame-all grid-all" style="width:100%; ">
<colgroup>
<col style="width:20%;">
<col style="width:20%;">
<col style="width:20%;">
<col style="width:20%;">
<col style="width:20%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Name</th>
<th class="tableblock halign-left valign-top">Description</th>
<th class="tableblock halign-left valign-top">Required</th>
<th class="tableblock halign-left valign-top">Schema</th>
<th class="tableblock halign-left valign-top">Default</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">claimName</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">ClaimName is the name of a PersistentVolumeClaim in the same namespace as the pod using this volume. More info: <a href="https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims">https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">string</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">readOnly</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Will force the ReadOnly setting in VolumeMounts. Default false.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">boolean</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1_resourcequotalist">v1.ResourceQuotaList</h3>
@@ -9785,6 +9788,54 @@ Examples:<br>
<div class="sect2">
<h3 id="_v1_azuredatadiskkind">v1.AzureDataDiskKind</h3>
</div>
<div class="sect2">
<h3 id="_v1_nodeconfigsource">v1.NodeConfigSource</h3>
<div class="paragraph">
<p>NodeConfigSource specifies a source of node configuration. Exactly one subfield (excluding metadata) must be non-nil.</p>
</div>
<table class="tableblock frame-all grid-all" style="width:100%; ">
<colgroup>
<col style="width:20%;">
<col style="width:20%;">
<col style="width:20%;">
<col style="width:20%;">
<col style="width:20%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Name</th>
<th class="tableblock halign-left valign-top">Description</th>
<th class="tableblock halign-left valign-top">Required</th>
<th class="tableblock halign-left valign-top">Schema</th>
<th class="tableblock halign-left valign-top">Default</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">kind</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: <a href="https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds">https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">string</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">apiVersion</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: <a href="https://git.k8s.io/community/contributors/devel/api-conventions.md#resources">https://git.k8s.io/community/contributors/devel/api-conventions.md#resources</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">string</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">configMapRef</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="#_v1_objectreference">v1.ObjectReference</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1_configmapkeyselector">v1.ConfigMapKeySelector</h3>
@@ -10155,6 +10206,13 @@ Examples:<br>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="#_v1_taint">v1.Taint</a> array</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">configSource</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">If specified, the source to get node configuration from The DynamicKubeletConfig feature gate must be enabled for the Kubelet to use this field</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="#_v1_nodeconfigsource">v1.NodeConfigSource</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
</tbody>
</table>