# Notebook placement failure when using Cluster Autoscaling

**URL:** <https://discourse.jupyter.org/t/notebook-placement-failure-when-using-cluster-autoscaling/2447>\
**Category:** Zero to JupyterHub on Kubernetes\
**Created:** [October 18, 2019, 5:06pm UTC](https://discourse.jupyter.org/t/notebook-placement-failure-when-using-cluster-autoscaling/2447 "2019-10-18T17:06:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![philvarner](https://avatars.discourse-cdn.com/v4/letter/p/74df32/32.png) [@philvarner](https://discourse.jupyter.org/u/philvarner)\
**Post date:** [October 18, 2019, 5:06pm UTC](https://discourse.jupyter.org/t/notebook-placement-failure-when-using-cluster-autoscaling/2447/1 "2019-10-18T17:06:08Z")

</div>

I’m trying to follow the documentation for Efficient Cluster Autoscaling. I haven’t seen a complete example for this, so I think i’ve misinterprented the docs in writing my config files. When I follow the steps below, my notebooks always fail to find somewhere to run.

The documentation says:

> - Setup a node pool (with autoscaling), a certain label, and a certain taint.If you need help on how to do this, please refer to your cloud providers documentation. A node pool may be called a node group.
> - The label: `hub.jupyter.org/node-purpose=user` **NOTE** : Cloud providers often have their own labels, separate from kubernetes labels, but this label must be a kubernetes label.
> - The taint: `hub.jupyter.org/dedicated=user:NoSchedule` **NOTE** : You may need to replace `/` with `_` due cloud provider limitations. Both taints are tolerated by the user pods.

This doesn’t mention the “taints” parameter on the nodegroup, but I see that in the examples cluster configs.

To each of my nodegroups, I added

> taints:  
> special: “true:NoSchedule”

and tried to label them with this, which I don’t know if is correct or not:

> labels:  
> hub.jupyter.org\_node-purpose: user

To my jhub helm config, I added:

> scheduling:  
> userPods:  
> nodeAffinity:  
> matchNodePurpose: require

Any help on this from someone who’s gotten it to work would be greatly appreciated.