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Support for both map-based and set-based selectors in extensions/v1beta1.Scale

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Here are a list of changes along with an explanation of how they work:
1. Add a new string field called TargetSelector to the external version of
   extensions Scale type (extensions/v1beta1.Scale). This is a serialized
   version of either the map-based selector (in case of ReplicationControllers)
   or the unversioned.LabelSelector struct (in case of Deployments and
   ReplicaSets).
2. Change the selector field in the internal Scale type (extensions.Scale) to
   unversioned.LabelSelector.
3. Add conversion functions to convert from two external selector fields to a
   single internal selector field. The rules for conversion are as follows:
   i.   If the target resource that this scale targets supports LabelSelector
        (Deployments and ReplicaSets), then serialize the LabelSelector and
        store the string in the TargetSelector field in the external version
        and leave the map-based Selector field as nil.
   ii.  If the target resource only supports a map-based selector
        (ReplicationControllers), then still serialize that selector and
	store the serialized string in the TargetSelector field. Also,
	set the the Selector map field in the external Scale type.
   iii. When converting from external to internal version, parse the
        TargetSelector string into LabelSelector struct if the string isn't
	empty. If it is empty, then check if the Selector map is set and just
	assign that map to the MatchLabels component of the LabelSelector.
   iv.  When converting from internal to external version, serialize the
        LabelSelector and store it in the TargetSelector field. If only
	the MatchLabel component is set, then also copy that value to
	the Selector map field in the external version.
4. HPA now just converts the LabelSelector field to a Selector interface
   type to list the pods.
5. Scale Get and Update etcd methods for Deployments and ReplicaSets now
   return extensions.Scale instead of autoscaling.Scale.
6. Consequently, SubresourceGroupVersion override and is "autoscaling"
   enabled check is now removed from pkg/master/master.go
7. Other small changes to labels package, fuzzer and LabelSelector
   helpers to piece this all together.
8. Add unit tests to HPA targeting Deployments and ReplicaSets.
9. Add an e2e test to HPA targeting ReplicaSets.
This commit is contained in:
Madhusudan.C.S
2016-03-08 16:27:13 -08:00
parent bf3cc9d126
commit fe26381c90
29 changed files with 670 additions and 439 deletions
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146
docs/api-reference/extensions/v1beta1/definitions.html
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@@ -1332,47 +1332,6 @@ Examples:<br>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1_scalestatus">v1.ScaleStatus</h3>
<div class="paragraph">
<p>ScaleStatus represents the current status of a scale subresource.</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">replicas</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">actual number of observed instances of the scaled object.</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">integer (int32)</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">selector</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">label query over pods that should match the replicas count. This is same as the label selector but in the string format to avoid introspection by clients. The string will be in the same format as the query-param syntax. More info about label selectors: <a href="http://releases.k8s.io/HEAD/docs/user-guide/labels.md#label-selectors">http://releases.k8s.io/HEAD/docs/user-guide/labels.md#label-selectors</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>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1beta1_jobstatus">v1beta1.JobStatus</h3>
@@ -2457,68 +2416,6 @@ Populated by the system when a graceful deletion is requested. Read-only. More i
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1_scale">v1.Scale</h3>
<div class="paragraph">
<p>Scale represents a scaling request for a resource.</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="http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#types-kinds">http://releases.k8s.io/HEAD/docs/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="http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#resources">http://releases.k8s.io/HEAD/docs/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">metadata</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Standard object metadata; More info: <a href="http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata">http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata</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"><a href="#_v1_objectmeta">v1.ObjectMeta</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spec</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">defines the behavior of the scale. More info: <a href="http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status">http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status</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"><a href="#_v1_scalespec">v1.ScaleSpec</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">status</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">current status of the scale. More info: <a href="http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status">http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status</a>. Read-only.</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_scalestatus">v1.ScaleStatus</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1_loadbalanceringress">v1.LoadBalancerIngress</h3>
@@ -3737,6 +3634,13 @@ Populated by the system when a graceful deletion is requested. Read-only. More i
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="#_any">any</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">targetSelector</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">label selector for pods that should match the replicas count. This is a serializated version of both map-based and more expressive set-based selectors. This is done to avoid introspection in the clients. The string will be in the same format as the query-param syntax. If the target type only supports map-based selectors, both this field and map-based selector field are populated. More info: <a href="http://releases.k8s.io/HEAD/docs/user-guide/labels.md#label-selectors">http://releases.k8s.io/HEAD/docs/user-guide/labels.md#label-selectors</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>
</tbody>
</table>
@@ -4686,40 +4590,6 @@ Both these may change in the future. Incoming requests are matched against the h
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1_scalespec">v1.ScaleSpec</h3>
<div class="paragraph">
<p>ScaleSpec describes the attributes of a scale subresource.</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">replicas</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">desired number of instances for the scaled object.</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">integer (int32)</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_v1beta1_labelselector">v1beta1.LabelSelector</h3>
@@ -5728,7 +5598,7 @@ Both these may change in the future. Incoming requests are matched against the h
</div>
<div id="footer">
<div id="footer-text">
Last updated 2016-03-03 20:23:06 UTC
Last updated 2016-03-09 19:21:59 UTC
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@@ -3304,7 +3304,7 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">200</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">success</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1_scale">v1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1beta1_scale">v1beta1.Scale</a></p></td>
</tr>
</tbody>
</table>
@@ -3386,7 +3386,7 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
<td class="tableblock halign-left valign-top"><p class="tableblock">body</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1_scale">v1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1beta1_scale">v1beta1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
@@ -3428,7 +3428,7 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">200</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">success</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1_scale">v1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1beta1_scale">v1beta1.Scale</a></p></td>
</tr>
</tbody>
</table>
@@ -3552,7 +3552,7 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">200</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">success</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1_scale">v1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1beta1_scale">v1beta1.Scale</a></p></td>
</tr>
</tbody>
</table>
@@ -7858,7 +7858,7 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">200</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">success</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1_scale">v1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1beta1_scale">v1beta1.Scale</a></p></td>
</tr>
</tbody>
</table>
@@ -7940,7 +7940,7 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
<td class="tableblock halign-left valign-top"><p class="tableblock">body</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1_scale">v1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1beta1_scale">v1beta1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
@@ -7982,7 +7982,7 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">200</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">success</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1_scale">v1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1beta1_scale">v1beta1.Scale</a></p></td>
</tr>
</tbody>
</table>
@@ -8106,7 +8106,7 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">200</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">success</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1_scale">v1.Scale</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="definitions.html#_v1beta1_scale">v1beta1.Scale</a></p></td>
</tr>
</tbody>
</table>
@@ -11401,7 +11401,7 @@ span.icon > [class^="icon-"], span.icon > [class*=" icon-"] { cursor: default; }
</div>
<div id="footer">
<div id="footer-text">
Last updated 2016-02-28 04:44:42 UTC
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