# 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:873870017f869a74e342a3121d1182ee9baeb139 # install vpnkit-expose-port and vpnkit-iptables-wrapper on host
  - linuxkit/init:31dcd928602e39ee752843ebcf6c35cbae73c883
  - linuxkit/runc:7ecf2e5253905855fb554b072d42903f7829c8b6
  - linuxkit/containerd:f645aa2f8aa58023149d7766725039572a2ebeb5
  - linuxkit/ca-certificates:4ed09a382de2b3ba2143f4270375b3bd6e973fb5
onboot:
  # support metadata for optional config in /run/config
  - name: metadata
    image: linuxkit/metadata:a5df09643d7ac6565295cad633c3d63489c3d4df
  - name: sysctl
    image: linuxkit/sysctl:2f575c3d127824eb8d059673c538c440d22f19f5
  - name: sysfs
    image: linuxkit/sysfs:f383bf1c1094383fa3a42e5d5cba7d247dfc6720
  - name: binfmt
    image: linuxkit/binfmt:7c086ece3b5894c3851e7284c128be8a08ba32b7
  # Format and mount the disk image in /var/lib/docker
  - name: format
    image: linuxkit/format:ae6114d970492747fafbd2071602090c8df3bbf4
  - name: mount
    image: linuxkit/mount:6c799d9cd854cb13cab253945aa3893995f22704
    command: ["/usr/bin/mountie", "/var/lib"]
  # make a swap file on the mounted disk
  - name: swap
    image: linuxkit/swap:7b7a05f24652d0a6e01b5b5cdcb73feef9d8e6b6
    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:0cca76e71466fc6128fad585549b70538855f254
    command: ["/sbin/dhcpcd", "--nobackground", "-f", "/dhcpcd.conf", "-1"]
services:
  # Enable acpi to shutdown on power events
  - name: acpid
    image: linuxkit/acpid:3cdd803fbe2d3f0b385caafe478be25fc5d1fadc
  # Enable getty for easier debugging
  - name: getty
    image: linuxkit/getty:ccac1189f78ff466b76d097a0b7b7236ea54de84
    env:
        - INSECURE=true
  # Run ntpd to keep time synchronised in the VM
  - name: ntpd
    image: linuxkit/openntpd:30314674e138726b6dc774dfb62a060d3a8da8d0
  # VSOCK to unix domain socket forwarding. Forwards guest /var/run/docker.sock
  # to a socket on the host.
  - name: vsudd
    image: linuxkit/vsudd:f8d52cb44f80504d9ef08534d06aaca612ccd4df
    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:3f85f8763b3436bd77d386a0c95679a544b7003a
    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:66535330f2ff8a1995d9a85d10d5484c9cb9b3ba
  # When the host resumes from sleep, force a clock resync
  - name: host-timesync-daemon
    image: linuxkit/host-timesync-daemon:95b380f87558950fb3737ef8795129f409040387
  # 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"]