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Update readme to express that daemon sets won't schedule on unschedulable nodes prior to kubernetes 1.2 #1434

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May 5, 2016
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Update readme to express that daemon sets won't schedule on unschedulable nodes prior to kubernetes 1.2 #1434

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13 changes: 9 additions & 4 deletions README.md
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Expand Up @@ -217,7 +217,7 @@ We currently provide three options for launching Weave Scope in ECS:

* A [CloudFormation template](https://www.weave.works/deploy-weave-aws-cloudformation-template/) to launch and easily evaluate Scope directly from your browser.
* An [Amazon Machine Image (AMI)](https://github.com/weaveworks/integrations/tree/master/aws/ecs#weaves-ecs-amis) for each ECS region.
* [A simple way to tailor the AMIs to your needs](https://github.com/weaveworks/integrations/tree/master/aws/ecs#creating-your-own-customized-weave-ecs-ami).
* [A simple way to tailor the AMIs to your needs](https://github.com/weaveworks/integrations/tree/master/aws/ecs#creating-your-own-customized-weave-ecs-ami).

## <a name="using-weave-scope-with-kubernetes"></a>Using Weave Scope with Kubernetes

Expand All @@ -237,7 +237,7 @@ in your Kubernetes cluster using
Kubernetes 1.2). DaemonSets are needed to ensure that each Kubernetes node
runs a Scope Probe:

* To enable them in an existing cluster, make sure to add a
* To enable DaemonSets in an existing cluster, make sure to add a
`--runtime-config=extensions/v1beta1/daemonsets=true` argument to the
[apiserver](https://github.com/kubernetes/kubernetes/blob/master/docs/admin/kube-apiserver.md)'s configuration
(normally found at `/etc/kubernetes/manifest/kube-apiserver.manifest`) followed by a
Expand All @@ -246,6 +246,11 @@ in your Kubernetes cluster using
* If you are creating a new cluster, set `KUBE_ENABLE_DAEMONSETS=true` in
your cluster configuration.

* Note that prior to Kubernetes version 1.2 DaemonSets would fail to schedule pods on
unschedulable nodes (typically the master). This will result in the probe
not running on that node. See [#1030](https://github.com/weaveworks/scope/issues/1030)
for more information. We advise you to use Kubernetes version 1.2 or higher.

3. Download the resource definitions:

```
Expand Down Expand Up @@ -273,15 +278,15 @@ kubectl create -f scope-probe-ds.yaml
6. Open Scope in your browser

* When running Scope in Standalone mode do:

```
kubectl port-forward $(kubectl get pod --selector=provider=weave-scope-app -o jsonpath={.items..metadata.name}) 4040
```

and open [http://localhost:4040](http://localhost:4040) in your browser. This allows you to access the Scope UI securely, without
opening it to the Internet.


* When running Scope in Cloud Service mode, simply log in to [https://scope.weave.works](https://scope.weave.works)

## <a name="probe_plugins"></a>Scope Probe Plugins
Expand Down