# Ray head node on kubernetes fails to start

**URL:** <https://discuss.ray.io/t/ray-head-node-on-kubernetes-fails-to-start/11612>\
**Category:** Kubernetes\
**Created:** [July 29, 2023, 2:13am UTC](https://discuss.ray.io/t/ray-head-node-on-kubernetes-fails-to-start/11612 "2023-07-29T02:13:15Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![anmshkmr](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/anmshkmr/32/4856_2.png) [@anmshkmr](https://discuss.ray.io/u/anmshkmr)\
**Post date:** [July 29, 2023, 2:13am UTC](https://discuss.ray.io/t/ray-head-node-on-kubernetes-fails-to-start/11612/1 "2023-07-29T02:13:15Z")

</div>

My Ray cluster fails to start up after installing the helm chart from kuberay.

`kubectl logs raycluster-kuberay-head-qttzw` shows the following:

> /bin/bash: line 1: 9 Illegal instruction (core dumped) ray start --head --dashboard-host=0.0.0.0 --metrics-export-port=8080 --block --num-cpus=1 --memory=2000000000

What should I do to run Ray on k8s successfully?