k3os-init

ssh_authorized_keys:
- github:jdbohrman
write_files:
- encoding: ""
  content: |-
    #!/bin/bash
    mkdir -p '/var/lib/rancher/k3s/server/manifests/'
    curl -L https://gist.githubusercontent.com/jdbohrman/714bb13d8b8404f647174d9132f5f320/raw/de0c3825d03aa84c70f95e7a4445802e53dabddb/call-rancher.yaml >> /var/lib/rancher/k3s/server/manifests/call-rancher.yaml
  owner: root
  path: /etc/rc.local
  permissions: '0755'
hostname: k3os-master
run_cmd:
- "sh /etc/rc.local"
boot_cmd:
- "echo hi from boot time && echo bye from boot time"
init_cmd:
- "echo hi on init && echo bye on init"
k3os:
  token: super-secure-local-cluster-token
  dns_nameservers:
  - 8.8.8.8
  - 1.1.1.1
  ntp_servers:
  - 0.us.pool.ntp.org
  - 1.us.pool.ntp.org
  k3s_args:
  - server
  - "--no-deploy=traefik"

There is a problem with your call-rancher url is .sh not .yaml.