RancherOS iPXE boot script and cloud-config. Ramdisk based deployment with persistent storage on disk. Configures private IP on eth1 from EC2 metadata.

cloud-config.yaml

#cloud-config
hostname: rancher-os
ssh_authorized_keys:
  - ssh-rsa AAAABBBBBBCCCCCCC...
write_files:
  - path: /opt/rancher/bin/start.sh
    permissions: 0700
    content: |
      #!/bin/bash
      # Configure private network on eth1
      sudo netconf
      rm -- "$0"
rancher:
  cloud_init:
    datasources:
      - ec2
  network:
    dns:
      nameserver:
        - 8.8.4.4
        - 4.2.2.3
    interfaces:
      eth0:
        dhcp: true
      eth1:
        address: $private_ipv4/16
        mtu: 1450
  state:
   fstype: auto
   dev: LABEL=RANCHER_STATE
   autoformat:
     - /dev/vda

rancheros-ipxe-boot-script

#!ipxe
# Boots RangerOS in Ramdisk with persistent storage on disk /dev/vda
 
# Location of Kernel/Initrd images
set base-url https://releases.rancher.com/os/latest
 
kernel ${base-url}/vmlinuz rancher.state.autoformat=[/dev/vda] rancher.cloud_init.datasources=[ec2]
initrd ${base-url}/initrd
boot