# This is an example for building the open source components of Docker for Mac
kernel:
  image: linuxkit/kernel:5.10.104
  cmdline: "console=ttyS0 page_poison=1"
init:
  - linuxkit/vpnkit-expose-port:2f6d203f8647b1bae5d5cef8aa4aa4bbd071cb5b # install vpnkit-expose-port and vpnkit-iptables-wrapper on host
  - linuxkit/init:ad37cb61355b08cf481c54b07612b5206be6254d
  - linuxkit/runc:8c00a7c58393f0cfcab81ac4171c00bcaec6b962
  - linuxkit/containerd:26f04b0b57e3d21bfb36732b5c6ebe8f08c6705b
  - linuxkit/ca-certificates:a37095d3d576815fdefe76a28444c68cd9eac8fe
onboot:
  # support metadata for optional config in /run/config
  - name: metadata
    image: linuxkit/metadata:fa7dda444e6cfcdaad696a013364d53c9ebebd62
  - name: sysctl
    image: linuxkit/sysctl:984bff0476b059ae86b4c3e7c15f93f72a5d0a57
  - name: sysfs
    image: linuxkit/sysfs:e7910655e4b320b769bb7e5819f33e0d097c98c4
  - name: binfmt
    image: linuxkit/binfmt:e13c3d8480ef26523171d872a37c25b1a9b6d653
  # Format and mount the disk image in /var/lib/docker
  - name: format
    image: linuxkit/format:97dcd726d14ce2ef767d674adb8a709d5a73c213
  - name: mount
    image: linuxkit/mount:ce11bd5f816af89ba0760853420aa988b98cda13
    command: ["/usr/bin/mountie", "/var/lib"]
  # make a swap file on the mounted disk
  - name: swap
    image: linuxkit/swap:c5218fcde4d99f6763227bf2daf39eee74e1ea11
    command: ["/swap.sh", "--path", "/var/lib/swap", "--size", "1024M"]
  # mount-vpnkit mounts the 9p share used by vpnkit to coordinate port forwarding
  - name: mount-vpnkit
    image: alpine:3.13
    binds:
        - /var/:/host_var:rbind,rshared
    capabilities:
        - CAP_SYS_ADMIN
    rootfsPropagation: shared
    command: ["sh", "-c", "mkdir -p /host_var/vpnkit/port && mount -v -t 9p -o trans=virtio,dfltuid=1001,dfltgid=50,version=9p2000 port /host_var/vpnkit"]
  # move logs to the mounted disk (this is a temporary fix until we can limit the log sizes)
  - name: move-logs
    image: alpine:3.13
    binds:
        - /var:/host_var
    command: ["sh", "-c", "mv -v /host_var/log /host_var/lib && ln -vs /var/lib/log /host_var/log"]
  - name: dhcpcd
    image: linuxkit/dhcpcd:0060977dc2cd15eb242c21888fad240f96ec7308
    command: ["/sbin/dhcpcd", "--nobackground", "-f", "/dhcpcd.conf", "-1"]
services:
  # Enable acpi to shutdown on power events
  - name: acpid
    image: linuxkit/acpid:f7075311b07774b41d536395ed7b2a1ac36789c3
  # Enable getty for easier debugging
  - name: getty
    image: linuxkit/getty:97d0743bc3baa349dc96809b58f8584c5896928a
    env:
        - INSECURE=true
  # Run ntpd to keep time synchronised in the VM
  - name: ntpd
    image: linuxkit/openntpd:2a6439b4f52cd694d139f5445287d9f09e392a92
  # VSOCK to unix domain socket forwarding. Forwards guest /var/run/docker.sock
  # to a socket on the host.
  - name: vsudd
    image: linuxkit/vsudd:95b76be440be0a0dd8de44f0532c897e7df9d1d9
    binds:
        - /var/run:/var/run
    command: ["/vsudd", "-inport", "2376:unix:/var/run/docker.sock"]
  # vpnkit-forwarder forwards network traffic to/from the host via VSOCK port 62373. 
  # It needs access to the vpnkit 9P coordination share 
  - name: vpnkit-forwarder
    image: linuxkit/vpnkit-forwarder:447dac4b62d790c0fedf1c0f8ed3245dbc3450f9
    binds:
        - /var/vpnkit:/port
    net: host
    command: ["/vpnkit-forwarder", "-vsockPort", "62373"]
  # Monitor for image deletes and invoke a TRIM on the container filesystem
  - name: trim-after-delete
    image: linuxkit/trim-after-delete:93ed89a36fa6fda9ef1fd7761489de8da69d40d0
  # When the host resumes from sleep, force a clock resync
  - name: host-timesync-daemon
    image: linuxkit/host-timesync-daemon:7c71f4948c57656657b87a2d4f2709f78fe82b7c
  # Run dockerd with the vpnkit userland proxy from the vpnkit-forwarder container.
  # Bind mounts /var/run to allow vsudd to connect to docker.sock, /var/vpnkit
  # for vpnkit coordination and /run/config/docker for the configuration file.
  - name: docker-dfm
    image: docker:20.10.6-dind
    capabilities:
     - all
    net: host
    mounts:
     - type: cgroup
       options: ["rw","nosuid","noexec","nodev","relatime"]
    binds:
     - /etc/resolv.conf:/etc/resolv.conf
     - /var/lib/docker:/var/lib/docker
     - /lib/modules:/lib/modules
     - /var/vpnkit:/port # vpnkit control 9p mount
     - /var/run:/var/run
     - /run/config/docker:/var/config/docker
     - /usr/bin/vpnkit-expose-port:/usr/bin/vpnkit-expose-port # userland proxy
     - /usr/bin/vpnkit-iptables-wrapper:/usr/bin/iptables # iptables wrapper
    command: [ "/usr/local/bin/docker-init", "/usr/local/bin/dockerd", "--",
            "--config-file", "/var/config/docker/daemon.json",
            "--swarm-default-advertise-addr=eth0",
            "--userland-proxy-path", "/usr/bin/vpnkit-expose-port",
            "--storage-driver", "overlay2" ]
    runtime:
      mkdir: ["/var/lib/docker"]