Cloud-config sample.

cloud-config.yml

#cloud-config
# convert this file into json like this:
# cat file | ruby -ne 'puts "            \"#{$_.gsub("\n","").gsub("\\","\\\\").gsub("\"","\\\"")}\\n\","'

coreos:
  etcd:
    discovery: https://discovery.etcd.io/...
    # multi-region and multi-cloud deployments need to use $public_ipv4
    addr: $private_ipv4:4001
    peer-addr: $private_ipv4:7001
  update:
    reboot-strategy: best-effort
  units:
    - name: etcd.service
      command: start
    - name: fleet.service
      command: start
    - name: init.kballenegger.service
      command: start
      content: |
        [Unit]
        Description=Initial setup script
        After=docker.service
        
        [Service]
        Type=oneshot
        RemainAfterExit=yes
        ExecStart=/root/init.kballenegger.sh

        [Install]
        WantedBy=multi-user.target
      
      
# write files

write_files:
  - path: /root/.dockercfg
    permissions: 0600
    content: |
      {"quay.io":{"auth":"...","email":""}}
  - path: /root/.ssh/id_rsa
    permissions: 0600
    content: |
      -----BEGIN RSA PRIVATE KEY-----
      ...
      -----END RSA PRIVATE KEY-----
  - path: /root/init.kballenegger.sh
    permissions: 0700
    content: |
      #!/bin/bash
      
      set -e
      
      # clone repos
      mkdir /repos
      cd /repos
      git clone git@github.com:kballenegger/kballenegger-services services
      git clone git@github.com:kballenegger/kballenegger-api-internal api-internal
      
      # delete init script
      rm /root/init.kballenegger.sh