# 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:87ac61469247b2a0483cbd1fd2915f220e078b78 # install vpnkit-expose-port and vpnkit-iptables-wrapper on host
  - linuxkit/init:8f1e6a0747acbbb4d7e24dc98f97faa8d1c6cec7
  - linuxkit/runc:f01b88c7033180d50ae43562d72707c6881904e4
  - linuxkit/containerd:de1b18eed76a266baa3092e5c154c84f595e56da
  - linuxkit/ca-certificates:c1c73ef590dffb6a0138cf758fe4a4305c9864f4
onboot:
  # support metadata for optional config in /run/config
  - name: metadata
    image: linuxkit/metadata:646c00ad6c0b3fc246b6af9ccfcd6b1eb6b6da8a
  - name: sysctl
    image: linuxkit/sysctl:bdc99eeedc224439ff237990ee06e5b992c8c1ae
  - name: sysfs
    image: linuxkit/sysfs:c3bdb00c5e23bf566d294bafd5f7890ca319056f
  - name: binfmt
    image: linuxkit/binfmt:a17941b47f5cb262638cfb49ffc59ac5ac2bf334
  # Format and mount the disk image in /var/lib/docker
  - name: format
    image: linuxkit/format:7efa07559dd23cb4dbebfd3ab48c50fd33625918
  - name: mount
    image: linuxkit/mount:422b219bb1c7051096126ac83e6dcc8b2f3f1176
    command: ["/usr/bin/mountie", "/var/lib"]
  # make a swap file on the mounted disk
  - name: swap
    image: linuxkit/swap:77305236719ed7ab4be0f3bccc179c583fe7f5ff
    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:52d2c4df0311b182e99241cdc382ff726755c450
    command: ["/sbin/dhcpcd", "--nobackground", "-f", "/dhcpcd.conf", "-1"]
services:
  # Enable acpi to shutdown on power events
  - name: acpid
    image: linuxkit/acpid:c05a368754f6436b326945dc16135ba547568d8d
  # Enable getty for easier debugging
  - name: getty
    image: linuxkit/getty:76951a596aa5e0867a38e28f0b94d620e948e3e8
    env:
        - INSECURE=true
  # Run ntpd to keep time synchronised in the VM
  - name: ntpd
    image: linuxkit/openntpd:d6c36ac367ed26a6eeffd8db78334d9f8041b038
  # VSOCK to unix domain socket forwarding. Forwards guest /var/run/docker.sock
  # to a socket on the host.
  - name: vsudd
    image: linuxkit/vsudd:89980cd551d3174b6d8528f39fbd7fd1ca049161
    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:ea4dded7386b09dd647e854664b029be0a4f420f
    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:533ed712cf5cede1d5aec121c3f8afc1f471f723
  # When the host resumes from sleep, force a clock resync
  - name: host-timesync-daemon
    image: linuxkit/host-timesync-daemon:cc7c2f88c0e585c292624b9665412c9aca615d55
  # 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"]