I'm trying to auomate the process of creating these directories

/data/foo
/data/foo/baz
/data/bar

on an NFS (Network File System) I created with the command

gcloud beta filestore instances create "${NFS_server_name}" \
  --project "${project_id}" \
  --location "${zone}" \
  --tier=STANDARD \
  --file-share=name="vol1",capacity=1TB \
  --network=name="default",reserved-ip-range="10.0.1.0/29"

so that I can create some kubernetes persistent volumes at the directories listed above. I have found no way to automate this process, the NFS has no public IP and even using a bastion machine doesn't work because google cloud logically separates the VM running the NFS from other instances.

This is my attempt with using a bastian machine:

# send remote command to provision NFS server
command_to_run='cd /data && mkdir -m 777 data && mkdir -m 777 outputs && mkdir -m 777 logs && mkdir -m 777 repos && mkdir -m 777 upload && cd repos && mkdir deployments/ && chmod 777 deployments/'
send_to_bastian=$(gcloud compute ssh ${NFS_server_name} \
    --zone ${zone} \
  --command "${command_to_run}")

echo "sending provisioning instructions to bastian machine: ${bastian_name}"
gcloud compute ssh ${bastian_name} \
    --zone ${zone} \
    --command "${send_to_bastian}"

How can I script the creation of these directories on the bastian machine? From my limited kubernetes experience it seems I cannot create persistent volume claims without the directory existing on the NFS server.

FYI I am trying to automate this blog post: https://danielfrg.com/blog/2018/10/model-management-polyaxon-argo-seldon/#installing-polyaxon

In that post the OP remotes into the NFS and manually creates the directories, there must be some way to automate this?