Set custom cloud config to a pve vm which uses coreos with nfs mount settings.

cloud-config.yml

#cloud-config

hostname: "coreos1"
ssh_authorized_keys:
  - ssh-rsa xxx

write-files:
  - path: /etc/conf.d/nfs
    permissions: '0644'
    content: |
      OPTS_RPC_MOUNTD=""
coreos:
  units:
    - name: rpc-statd.service
      command: start
      enable: true
    - name: mnt-foo.mount
      command: start
      content: |
        [Mount]
        What=192.168.xx.xx:/volume1/foo
        Where=/mnt/foo
        Type=nfs

set-pve-cloud-config.sh

#!/bin/bash

USERCONFIG_DEFAULT=none
SNIPPETSPATH=/var/lib/vz/snippets

OSNAME=coreos
VMID_DEFAULT=56000
read -p "Enter a VM ID for $OSNAME [$VMID_DEFAULT]: " VMID
VMID=${VMID:-$VMID_DEFAULT}

printf "\n*** The script can add a cloud-init configuration with users and SSH keys from a file in the current directory.\n"
read -p "Supply the name of the cloud-init-config.yml (this will be skipped, if file not found) [$USERCONFIG_DEFAULT]: " USERCONFIG

USERCONFIG=${USERCONFIG:-$USERCONFIG_DEFAULT}
if [ -f $PWD/$USERCONFIG ]
then
    # The cloud-init user config file overrides the user settings done elsewhere
    printf "\n** Adding user configuration\n"
    cp -v $PWD/$USERCONFIG $SNIPPETSPATH/$VMID-$OSNAME-$USERCONFIG
    qm set $VMID --cicustom "user=local:snippets/$VMID-$OSNAME-$USERCONFIG"
    printf "#* cloud-config: $VMID-$OSNAME-$USERCONFIG\n" >> /etc/pve/qemu-server/$VMID.conf
fi

printf "\n*** The following cloud-init configuration for User and Network will be used ***\n\n"
qm cloudinit dump $VMID user
printf "\n------------------------------\n"
qm cloudinit dump $VMID network

printf "Done.\n\n"