# This is an example for building the open source components of Docker for Mac
kernel:
  image: linuxkit/kernel:6.6.13
  cmdline: "console=ttyS0 page_poison=1"
init:
  - linuxkit/vpnkit-expose-port:a3fbd97ce0a2d0bc77c917f6a6d18cd5bb32d58c # install vpnkit-expose-port and vpnkit-iptables-wrapper on host
  - linuxkit/init:c9a1adb982eb4074c01a34ce43860b6df24c252d
  - linuxkit/runc:bcd6268ea2d45dc7c6b43ca82d00dd01e7105f17
  - linuxkit/containerd:d33b20080a2f88e833680dc8563b5a03a13a297e
  - linuxkit/ca-certificates:e1688f69167c991bf5be1be809fd68685a4a4a9a
onboot:
  # support metadata for optional config in /run/config
  - name: metadata
    image: linuxkit/metadata:8f634b8ba5721c1a3430846fb672536945a04abb
  - name: sysctl
    image: linuxkit/sysctl:0c5861d22fac133d5bf679e763a1df14ad927de2
  - name: sysfs
    image: linuxkit/sysfs:b77e6229c5b673421fc4fa938d02907278e895c3
  - name: binfmt
    image: linuxkit/binfmt:50acb90af078d9afee42ec0ea7f418cb4e3bf1a8
  # Format and mount the disk image in /var/lib/docker
  - name: format
    image: linuxkit/format:1214ae707090285cec2102e696c62892e3d8d0aa
  - name: mount
    image: linuxkit/mount:7cffeb3a4a77af09397479fe8e21c0dfce438cd0
    command: ["/usr/bin/mountie", "/var/lib"]
  # make a swap file on the mounted disk
  - name: swap
    image: linuxkit/swap:d50ab34d24aea536480337365b9ba286c64783c6
    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:c1f461bd40fabb1f3bb77348ab52abad8393bdb3
    command: ["/sbin/dhcpcd", "--nobackground", "-f", "/dhcpcd.conf", "-1"]
services:
  # Enable acpi to shutdown on power events
  - name: acpid
    image: linuxkit/acpid:78206e0612a2b521459178e11f590901a3bd00bc
  # Enable getty for easier debugging
  - name: getty
    image: linuxkit/getty:42bfdda2fef25c9fd84a58bb88de1496a7cafcda
    env:
        - INSECURE=true
  # Run ntpd to keep time synchronised in the VM
  - name: ntpd
    image: linuxkit/openntpd:58cc4dc0fcc1f4cabbe586277cc2949337da5e31
  # VSOCK to unix domain socket forwarding. Forwards guest /var/run/docker.sock
  # to a socket on the host.
  - name: vsudd
    image: linuxkit/vsudd:16438e37ca05f79c985e014e924a66e0fac3f3d2
    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:135927339bb2d6416bca3a2eefe1c8239bc4d817
    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:730aa70eb57b1c5005bb89863c68f0a330177a04
  # When the host resumes from sleep, force a clock resync
  - name: host-timesync-daemon
    image: linuxkit/host-timesync-daemon:e8fcb76cca89e722cbfe609c79004b37aa660655
  # 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"]