Question

How do I automatically create a directory and mount a GlusterFS volume on Kubernetes workers?

Posted January 14, 2021 523 views
ClusteringStorageKubernetes

Hello,

I’m just getting started deploying, managing and utilising Kubernetesfor parts of my workloads (the part of the workloads that are stateless). I’m therefore running an external storage cluster using GlusterFS. I know how to manage GlusterFS etc, but since there is no access to SSH on the worker nodes, and the amount of worker nodes scale up and down automatically depending on the performance and traffic of the cluster, I wondered if there was a way that I could tell my Kubernetes master to automatically create the folder and mount the GlusterFS volume to this folder.

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1 answer

Hi @stianm

One option you have to perform such an action on each and every node would be to run a privileged Daemonset. You could use the daemonset run the modifications you wish on each node. Please note that this may limit the supportability of your cluster. If the cluster configurations are changed that could lead to unintended errors or stability issues that our engineering and support team is unfamiliar with.

Here is the official docs on Daemonsets to help you get started: https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/

Hope this helps!

Regards,

John Kwiatkoski
Senior Developer Support Engineer - Kubernetes