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Add release notes for v1.2.1 and cleanup/unify formatting/layout.

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<!-- BEGIN MUNGE: GENERATED_TOC --> <!-- BEGIN MUNGE: GENERATED_TOC -->
- [Release Notes for Kubernetes v1.3.0-alpha.1](#release-notes-for-kubernetes-v130-alpha1) - [v1.2.1](#v121)
- [[Documentation](http://kubernetes.github.io) & [Examples](http://releases.k8s.io/HEAD/examples)](#documentationhttpkubernetesgithubio--exampleshttpreleasesk8sioheadexamples)
- [Downloads](#downloads) - [Downloads](#downloads)
- [Changes since v1.2.0 (last PR #23530)](#changes-since-v120-last-pr-23530) - [Changes since v1.2.0](#changes-since-v120)
- [Other notable changes](#other-notable-changes)
- [v1.3.0-alpha.1](#v130-alpha1)
- [Downloads](#downloads)
- [Changes since v1.2.0](#changes-since-v120)
- [Action Required](#action-required) - [Action Required](#action-required)
- [Other notable changes](#other-notable-changes) - [Other notable changes](#other-notable-changes)
- [Release Notes for Kubernetes 1.2.0](#release-notes-for-kubernetes-120) - [v1.2.0](#v120)
- [[Documentation](http://kubernetes.github.io) & [Examples](http://releases.k8s.io/release-1.2/examples)](#documentationhttpkubernetesgithubio--exampleshttpreleasesk8siorelease-12examples)
- [Downloads](#downloads) - [Downloads](#downloads)
- [Changes since v1.1.1](#changes-since-v111) - [Changes since v1.1.1](#changes-since-v111)
- [Major Themes](#major-themes) - [Major Themes](#major-themes)
- [Other notable improvements](#other-notable-improvements) - [Other notable improvements](#other-notable-improvements)
- [Experimental Features](#experimental-features) - [Experimental Features](#experimental-features)
- [Action required](#action-required) - [Action required](#action-required)
- [Known Issues](#known-issues) - [Known Issues](#known-issues)
- [Docker Known Issues](#docker-known-issues) - [Docker Known Issues](#docker-known-issues)
- [1.9.1](#191) - [1.9.1](#191)
- [Provider-specific Notes](#provider-specific-notes) - [Provider-specific Notes](#provider-specific-notes)
- [Various](#various) - [Various](#various)
- [AWS](#aws) - [AWS](#aws)
- [GCE](#gce) - [GCE](#gce)
- [Changelog](#changelog)
<!-- END MUNGE: GENERATED_TOC --> <!-- END MUNGE: GENERATED_TOC -->
<!-- NEW RELEASE NOTES ENTRY --> <!-- NEW RELEASE NOTES ENTRY -->
# Release Notes for Kubernetes v1.3.0-alpha.1 # v1.2.1
## [Documentation](http://kubernetes.github.io) & [Examples](http://releases.k8s.io/HEAD/examples) [Documentation](http://kubernetes.github.io) & [Examples](http://releases.k8s.io/release-1.2/examples)
## Downloads
binary | sha1 hash | md5 hash
------ | --------- | --------
[kubernetes.tar.gz](https://storage.googleapis.com/kubernetes-release/release/v1.2.1/kubernetes.tar.gz) | `1639807c5788e1c6b1ab51fd30b723fb5debd865` | `235a1da47972c96a560d718d3256ca4f`
## Changes since v1.2.0
### Other notable changes
* AWS: Fix problems with >2 security groups ([#23718](https://github.com/kubernetes/kubernetes/pull/23718), [@justinsb](https://github.com/justinsb))
* AWS: Fix problems with >2 security groups ([#23340](https://github.com/kubernetes/kubernetes/pull/23340), [@justinsb](https://github.com/justinsb))
* IngressTLS: allow secretName to be blank for SNI routing ([#23707](https://github.com/kubernetes/kubernetes/pull/23707), [@tam7t](https://github.com/tam7t))
* IngressTLS: allow secretName to be blank for SNI routing ([#23500](https://github.com/kubernetes/kubernetes/pull/23500), [@tam7t](https://github.com/tam7t))
* Heapster patch release to 1.0.2 ([#23487](https://github.com/kubernetes/kubernetes/pull/23487), [@piosz](https://github.com/piosz))
* Remove unnecessary override of /etc/init.d/docker on containervm image. ([#23593](https://github.com/kubernetes/kubernetes/pull/23593), [@dchen1107](https://github.com/dchen1107))
* Change kube-proxy & fluentd CPU request to 20m/80m. ([#23646](https://github.com/kubernetes/kubernetes/pull/23646), [@cjcullen](https://github.com/cjcullen))
* make docker-checker more robust ([#23662](https://github.com/kubernetes/kubernetes/pull/23662), [@ArtfulCoder](https://github.com/ArtfulCoder))
* validate that daemonsets don't have empty selectors on creation ([#23530](https://github.com/kubernetes/kubernetes/pull/23530), [@mikedanese](https://github.com/mikedanese))
* don't sync deployment when pod selector is empty ([#23467](https://github.com/kubernetes/kubernetes/pull/23467), [@mikedanese](https://github.com/mikedanese))
* Support differentiation of OS distro in e2e tests ([#23466](https://github.com/kubernetes/kubernetes/pull/23466), [@andyzheng0831](https://github.com/andyzheng0831))
* don't sync daemonsets with selectors that match all pods ([#23223](https://github.com/kubernetes/kubernetes/pull/23223), [@mikedanese](https://github.com/mikedanese))
* Trusty: Avoid reaching GCE custom metadata size limit ([#22818](https://github.com/kubernetes/kubernetes/pull/22818), [@andyzheng0831](https://github.com/andyzheng0831))
* Update kubectl help for 1.2 resources ([#23305](https://github.com/kubernetes/kubernetes/pull/23305), [@janetkuo](https://github.com/janetkuo))
* Removing URL query param from swagger UI to fix the XSS issue ([#23234](https://github.com/kubernetes/kubernetes/pull/23234), [@nikhiljindal](https://github.com/nikhiljindal))
* Fix hairpin mode ([#23325](https://github.com/kubernetes/kubernetes/pull/23325), [@MurgaNikolay](https://github.com/MurgaNikolay))
* Bump to container-vm-v20160321 ([#23313](https://github.com/kubernetes/kubernetes/pull/23313), [@zmerlynn](https://github.com/zmerlynn))
* Remove the restart-kube-proxy and restart-apiserver functions ([#23180](https://github.com/kubernetes/kubernetes/pull/23180), [@roberthbailey](https://github.com/roberthbailey))
* Copy annotations back from RS to Deployment on rollback ([#23160](https://github.com/kubernetes/kubernetes/pull/23160), [@janetkuo](https://github.com/janetkuo))
* Trusty: Support hybrid cluster with nodes on ContainerVM ([#23079](https://github.com/kubernetes/kubernetes/pull/23079), [@andyzheng0831](https://github.com/andyzheng0831))
* update expose command description to add deployment ([#23246](https://github.com/kubernetes/kubernetes/pull/23246), [@AdoHe](https://github.com/AdoHe))
* Add a rate limiter to the GCE cloudprovider ([#23019](https://github.com/kubernetes/kubernetes/pull/23019), [@alex-mohr](https://github.com/alex-mohr))
* Add a Deployment example for kubectl expose. ([#23222](https://github.com/kubernetes/kubernetes/pull/23222), [@madhusudancs](https://github.com/madhusudancs))
* Use versioned object when computing patch ([#23145](https://github.com/kubernetes/kubernetes/pull/23145), [@liggitt](https://github.com/liggitt))
* kubelet: send all recevied pods in one update ([#23141](https://github.com/kubernetes/kubernetes/pull/23141), [@yujuhong](https://github.com/yujuhong))
* Add a SSHKey sync check to the master's healthz (when using SSHTunnels). ([#23167](https://github.com/kubernetes/kubernetes/pull/23167), [@cjcullen](https://github.com/cjcullen))
* Validate minimum CPU limits to be >= 10m ([#23143](https://github.com/kubernetes/kubernetes/pull/23143), [@vishh](https://github.com/vishh))
* kubernetes/kubernetes#23034 Fix controller-manager race condition issue which cause endpoints flush during restart ([#23035](https://github.com/kubernetes/kubernetes/pull/23035), [@xinxiaogang](https://github.com/xinxiaogang))
* MESOS: forward globally declared cadvisor housekeeping flags ([#22974](https://github.com/kubernetes/kubernetes/pull/22974), [@jdef](https://github.com/jdef))
* Trusty: support developer workflow on base image ([#22960](https://github.com/kubernetes/kubernetes/pull/22960), [@andyzheng0831](https://github.com/andyzheng0831))
# v1.3.0-alpha.1
[Documentation](http://kubernetes.github.io) & [Examples](http://releases.k8s.io/HEAD/examples)
## Downloads ## Downloads
@ -37,7 +83,7 @@ binary | sha1 hash | md5 hash
------ | --------- | -------- ------ | --------- | --------
[kubernetes.tar.gz](https://storage.googleapis.com/kubernetes-release/release/v1.3.0-alpha.1/kubernetes.tar.gz) | `e0041b08e220a4704ea2ad90a6ec7c8f2120c2d3` | `7bb2df32aea94678f72a8d1f43a12098` [kubernetes.tar.gz](https://storage.googleapis.com/kubernetes-release/release/v1.3.0-alpha.1/kubernetes.tar.gz) | `e0041b08e220a4704ea2ad90a6ec7c8f2120c2d3` | `7bb2df32aea94678f72a8d1f43a12098`
## Changes since v1.2.0 (last PR #23530) ## Changes since v1.2.0
### Action Required ### Action Required
@ -71,9 +117,9 @@ binary | sha1 hash | md5 hash
* update wide option output ([#22772](https://github.com/kubernetes/kubernetes/pull/22772), [@AdoHe](https://github.com/AdoHe)) * update wide option output ([#22772](https://github.com/kubernetes/kubernetes/pull/22772), [@AdoHe](https://github.com/AdoHe))
* Change scheduler logic from random to round-robin ([#22430](https://github.com/kubernetes/kubernetes/pull/22430), [@gmarek](https://github.com/gmarek)) * Change scheduler logic from random to round-robin ([#22430](https://github.com/kubernetes/kubernetes/pull/22430), [@gmarek](https://github.com/gmarek))
# Release Notes for Kubernetes 1.2.0 # v1.2.0
## [Documentation](http://kubernetes.github.io) & [Examples](http://releases.k8s.io/release-1.2/examples) [Documentation](http://kubernetes.github.io) & [Examples](http://releases.k8s.io/release-1.2/examples)
## Downloads ## Downloads
@ -83,7 +129,7 @@ binary | sha1 hash | md5 hash
## Changes since v1.1.1 ## Changes since v1.1.1
## Major Themes ### Major Themes
* <strong>Significant scale improvements</strong>. Increased cluster scale by 400% to 1000 nodes with 30,000 pods per cluster. * <strong>Significant scale improvements</strong>. Increased cluster scale by 400% to 1000 nodes with 30,000 pods per cluster.
Kubelet supports 100 pods per node with 4x reduced system overhead. Kubelet supports 100 pods per node with 4x reduced system overhead.
@ -120,7 +166,7 @@ interacting with the system. Note: the GUI is enabled by default in 1.2 clusters
<img src="docs/images/newgui.png" width="" alt="Dashboard UI screenshot showing cards that represent applications that run inside a cluster" title="Dashboard UI apps screen"> <img src="docs/images/newgui.png" width="" alt="Dashboard UI screenshot showing cards that represent applications that run inside a cluster" title="Dashboard UI apps screen">
## Other notable improvements ### Other notable improvements
* Job was Beta in 1.1 and is GA in 1.2 . * Job was Beta in 1.1 and is GA in 1.2 .
* <code>apiVersion: batch/v1 </code>is now available. You now do not need to specify the <code>.spec.selector</code> field — a [unique selector is automatically generated ](http://kubernetes.io/docs/user-guide/jobs/#pod-selector)for you. * <code>apiVersion: batch/v1 </code>is now available. You now do not need to specify the <code>.spec.selector</code> field — a [unique selector is automatically generated ](http://kubernetes.io/docs/user-guide/jobs/#pod-selector)for you.
@ -186,7 +232,7 @@ Pod’s SELinux context, if specified
Volumes (SMB 2.1 and 3.0) into a Pod. See [example](https://github.com/kubernetes/kubernetes/blob/release-1.2/examples/azure_file/README.md) for details. Volumes (SMB 2.1 and 3.0) into a Pod. See [example](https://github.com/kubernetes/kubernetes/blob/release-1.2/examples/azure_file/README.md) for details.
* Logs usage and root filesystem usage of a container, volumes usage of a pod and node disk usage are exposed through Kubelet new metrics API. * Logs usage and root filesystem usage of a container, volumes usage of a pod and node disk usage are exposed through Kubelet new metrics API.
## Experimental Features ### Experimental Features
* Dynamic Provisioning of PersistentVolumes: Kubernetes previously required all * Dynamic Provisioning of PersistentVolumes: Kubernetes previously required all
volumes to be manually provisioned by a cluster administrator before use. With volumes to be manually provisioned by a cluster administrator before use. With
@ -218,7 +264,7 @@ volume plugin path on each kubelet node. This is an alpha feature and may
change in future. change in future.
* Kubelet exposes a new Alpha metrics API - /stats/summary in a user friendly format with reduced system overhead. The measurement is done in PR [#22542](https://github.com/kubernetes/kubernetes/pull/22542). * Kubelet exposes a new Alpha metrics API - /stats/summary in a user friendly format with reduced system overhead. The measurement is done in PR [#22542](https://github.com/kubernetes/kubernetes/pull/22542).
## Action required ### Action required
* Docker v1.9.1 is officially recommended. Docker v1.8.3 and Docker v1.10 are * Docker v1.9.1 is officially recommended. Docker v1.8.3 and Docker v1.10 are
supported. If you are using an older release of Docker, please upgrade. Known supported. If you are using an older release of Docker, please upgrade. Known
@ -290,7 +336,7 @@ change. More details [here](https://docs.influxdata.com/influxdb/v0.9/administra
* We have renamed “minions” to “nodes”. If you were specifying NUM\_MINIONS or * We have renamed “minions” to “nodes”. If you were specifying NUM\_MINIONS or
MINION\_SIZE to kube-up, you should now specify NUM\_NODES or NODE\_SIZE. MINION\_SIZE to kube-up, you should now specify NUM\_NODES or NODE\_SIZE.
## Known Issues ### Known Issues
* Paused deployments can't be resized and don't clean up old ReplicaSets. * Paused deployments can't be resized and don't clean up old ReplicaSets.
* Minimum memory limit is 4MB. This is a docker limitation * Minimum memory limit is 4MB. This is a docker limitation
@ -325,9 +371,9 @@ rollout” commands instead, if you want to rolling update Replica Sets.
* When live upgrading Kubelet to 1.2 without draining the pods running on the node, * When live upgrading Kubelet to 1.2 without draining the pods running on the node,
the containers will be restarted by Kubelet (see details in [#23104](https://github.com/kubernetes/kubernetes/issues/23104)). the containers will be restarted by Kubelet (see details in [#23104](https://github.com/kubernetes/kubernetes/issues/23104)).
### Docker Known Issues #### Docker Known Issues
#### 1.9.1 ##### 1.9.1
* Listing containers can be slow at times which will affect kubelet performance. * Listing containers can be slow at times which will affect kubelet performance.
More information [here](https://github.com/docker/docker/issues/17720) More information [here](https://github.com/docker/docker/issues/17720)
@ -338,15 +384,15 @@ restarting the daemon alleviates this issue, but hasn’t been verified to
completely eliminate the IP allocation issue. More information [here](https://github.com/kubernetes/kubernetes/issues/21523#issuecomment-191498969) completely eliminate the IP allocation issue. More information [here](https://github.com/kubernetes/kubernetes/issues/21523#issuecomment-191498969)
* Daemon becomes unresponsive (rarely) due to kernel deadlocks. More information [here](https://github.com/kubernetes/kubernetes/issues/21866#issuecomment-189492391) * Daemon becomes unresponsive (rarely) due to kernel deadlocks. More information [here](https://github.com/kubernetes/kubernetes/issues/21866#issuecomment-189492391)
## Provider-specific Notes ### Provider-specific Notes
### Various #### Various
Core changes: Core changes:
* Support for load balancers with source ranges * Support for load balancers with source ranges
### AWS #### AWS
Core changes: Core changes:
@ -368,27 +414,10 @@ With kube-up:
* Use an elastic IP for the master by default * Use an elastic IP for the master by default
* Experimental support for node spot instances (set NODE\_SPOT\_PRICE=0.05) * Experimental support for node spot instances (set NODE\_SPOT\_PRICE=0.05)
### GCE #### GCE
* Ubuntu Trusty support added * Ubuntu Trusty support added
## Changelog
(Linked [github releases](https://github.com/kubernetes/kubernetes/releases) 1.2.0-beta-1 to 1.1.2 that are part of 1.2.0)
* [v1.2.0-beta.1](https://github.com/kubernetes/kubernetes/releases/tag/v1.2.0-beta.1)
* [v1.2.0-beta.0](https://github.com/kubernetes/kubernetes/releases/tag/v1.2.0-beta.0)
* [v1.2.0-alpha.8](https://github.com/kubernetes/kubernetes/releases/tag/v1.2.0-alpha.8)
* [v1.2.0-alpha.7](https://github.com/kubernetes/kubernetes/releases/tag/v1.2.0-alpha.7)
* [v1.2.0-alpha.6](https://github.com/kubernetes/kubernetes/releases/tag/v1.2.0-alpha.6)
* [v1.2.0-alpha.5](https://github.com/kubernetes/kubernetes/releases/tag/v1.2.0-alpha.5)
* [v1.2.0-alpha.4](https://github.com/kubernetes/kubernetes/releases/tag/v1.2.0-alpha.4)
* [v1.1.8](https://github.com/kubernetes/kubernetes/releases/tag/v1.1.8)
* [v1.1.7](https://github.com/kubernetes/kubernetes/releases/tag/v1.1.7)
* [v1.1.4](https://github.com/kubernetes/kubernetes/releases/tag/v1.1.4)
* [v1.1.3](https://github.com/kubernetes/kubernetes/releases/tag/v1.1.3)
* [v1.1.2](https://github.com/kubernetes/kubernetes/releases/tag/v1.1.2)
Please see the [Releases Page](https://github.com/kubernetes/kubernetes/releases) for older releases. Please see the [Releases Page](https://github.com/kubernetes/kubernetes/releases) for older releases.