Create VM and install rancheros by cloud-init on Proxmox VE.

config.yml

#cloud-config
rancher:
 network:
  interfaces:
   eth0:
    address: 192.168.1.20/24
    gateway: 192.168.1.1
    mtu: 1500
    dhcp: false
  dns:
   nameservers:
   - 114.114.114.114
   - 8.8.8.8
write_files:
  - path: /home/rancher/install.yml
    permissions: "777"
    content: |
      #cloud-config
      hostname: rancher-server
      rancher:
       console: ubuntu
       network:
        interfaces:
         eth0:
          address: 192.168.1.20/24
          gateway: 192.168.1.1
          mtu: 1500
          dhcp: false
        dns:
         nameservers:
         - 114.114.114.114
         - 8.8.8.8
      ssh_authorized_keys:
       - ssh-rsa AAAA****
runcmd:
  - echo Y | sudo ros install -c /home/rancher/install.yml -d /dev/sda

createVM.sh

VMID = 9000
qm create ${VMID} --name rancheros-cloud-image --memory 4096 --balloon 0 --net0 virtio,bridge=vmbr0 --cores 4 --sockets 1 --cpu cputype=host --kvm 1 --numa 1
qm set ${VMID} --ide2 local:iso/rancheros-proxmoxve.iso,media=cdrom
qm set ${VMID} --scsihw virtio-scsi-pci --scsi0 local-lvm:32
qm set ${VMID} --boot cdn --bootdisk scsi0
qm set ${VMID} --agent 1
#Cloud INIT
qm set ${VMID} --ide0 local-lvm:cloudinit
# location of config.yml is /var/liv/vz/snippets/config.yml
qm set ${VMID} --cicustom "user=local:snippets/config.yml" --citype configdrive2