netboot on linux

coreos-user_data.yml

#cloud-config

---
ssh_authorized_keys:
  - ssh-rsa mysecretkey
hostname: coreos01
coreos:
  etcd:
    name: coreos01
    #discovery: https://discovery.etcd.io/b37f862b7eb38b8703effc034b814019
    addr: 192.168.1.72:4001
    peer-addr: 192.168.1.72:7001
  fleet:
    public-ip: 192.168.1.72
  units:
  - name: etcd.service
    command: start
  - name: fleet.service
    command: start
  - name: docker-tcp.socket
    command: start
    enable: true
    content: |
      [Unit]
      Description=Docker Socket for the API

      [Socket]
      ListenStream=2375
      Service=docker.service
      BindIPv6Only=both

      [Install]
      WantedBy=sockets.target
  - name: static.network
    command: start
    enable: true
    content: |
      [Match]
      Name=en*

      [Network]
      Address=192.168.1.72/24
      Gateway=192.168.1.254
      DNS=192.168.1.8
      DNS=192.168.1.6
      DNS=4.2.2.2
write_files:
  - path: /etc/environment
    content: |
        COREOS_PUBLIC_IPV4=192.168.1.72
        COREOS_PRIVATE_IPV4=192.168.1.72

mnt-nbi.mount

[Unit]
Before=docker.service
Description = Mounts NAS share for Netboot Images

[Mount]
Restart=always
RestartSec=10
TimeoutStartSec=10m
What = nas.example.org:/nbi
Where = /mnt/nbi
Type = nfs
Options=nolock,proto=tcp,port=2049

[Install]
WantedBy = multi-user.target

netboot-bsdp.service

[Unit]
Description=tftpd for bspdy
After=netboot-data.service
Requires=docker.service

[Service]
EnvironmentFile=/etc/environment
ExecStartPre=-/usr/bin/docker kill netboot-bsdp
ExecStartPre=-/usr/bin/docker rm -f netboot-bsdp
ExecStartPre=/usr/bin/docker pull macadmins/tftpd
ExecStart=/usr/bin/docker run --rm --name netboot-bsdp \
  --volumes-from netboot-data -p 0.0.0.0:67:67/udp \
  --entrypoint /usr/bin/env -e BSDPY_IP=${COREOS_PUBLIC_IPV4} \
  bruienne/bsdpy:1.0 /usr/bin/env python /bsdpy/bsdpserver.py
ExecStop=-/usr/bin/docker stop netboot-bsdp

[Install]
WantedBy=multi-user.target

netboot-data.service

[Unit]
Description=Data Container Netboot Service
After=mnt-nbi.mount
Requires=mnt-nbi.mount
Requires=docker.service

[Service]
ConditionDirectoryNotEmpty=/mnt/nbi
RemainAfterExit=yes
ExecStartPre=/usr/bin/docker pull busybox
ExecStart=/bin/bash -c '/usr/bin/docker start -a netboot-data || /usr/bin/docker run \
  --name netboot-data -v /mnt/nbi:/nbi \
  busybox'

[Install]
WantedBy=multi-user.target

netboot-httpd.service

[Unit]
Description=Serve NBI image over HTTP
After=netboot-data.service
Requires=docker.service

[Service]
ExecStartPre=-/usr/bin/docker kill netboot-httpd
ExecStartPre=-/usr/bin/docker rm -f netboot-httpd
ExecStartPre=/usr/bin/docker pull macadmins/netboot-httpd
ExecStart=/usr/bin/docker run --rm --name netboot-httpd \
  --volumes-from netboot-data -p 80:80 \
  macadmins/netboot-httpd
ExecStop=-/usr/bin/docker stop netboot-httpd

[Install]
WantedBy=multi-user.target

netboot-tftpd.service

[Unit]
Description=tftpd for bspdy
After=netboot-data.service
Requires=docker.service

[Service]
ExecStartPre=-/usr/bin/docker kill netboot-tftpd
ExecStartPre=-/usr/bin/docker rm -f netboot-tftpd
ExecStartPre=/usr/bin/docker pull macadmins/tftpd
ExecStart=/usr/bin/docker run --rm --name netboot-tftpd \
  --volumes-from netboot-data -p 0.0.0.0:69:69/udp \
  macadmins/tftpd /usr/sbin/in.tftpd --listen --foreground -vvvv \
  --verbosity 10 --user user -r blksize /nbi
ExecStop=-/usr/bin/docker stop netboot-tftpd

[Install]
WantedBy=multi-user.target

unit_tree.txt

#unit files
.
├── mnt-nbi.mount
├── netboot-bsdp.service
├── netboot-data.service
├── netboot-httpd.service
└── netboot-tftpd.service