# 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:b1615db443ce330a763f5c26a1dfbbe65c209dfa # install vpnkit-expose-port and vpnkit-iptables-wrapper on host
  - linuxkit/init:5251073a3d3e52881bf2697f7dfabac6eedfd569
  - linuxkit/runc:49628804b3a39b0a0cfab046dd80b76a4fd87b5a
  - linuxkit/containerd:c35f10fb8127841b4eb82ddfcebd5d5a54bad0e7
  - linuxkit/ca-certificates:945ac3f0c1a31535d37ff77003fc30dbd71da6bb
onboot:
  # support metadata for optional config in /run/config
  - name: metadata
    image: linuxkit/metadata:2f7fe9290bf5e192bafee2a767e392485ec30ed5
  - name: sysctl
    image: linuxkit/sysctl:7c0059d1ad7d86127d990474b6e5f17297c07bf5
  - name: sysfs
    image: linuxkit/sysfs:713f1e871e7fdfcdc9088385501d3c49116e915d
  - name: binfmt
    image: linuxkit/binfmt:2432eabd3f545ace20077c773e1fafdabab6442a
  # Format and mount the disk image in /var/lib/docker
  - name: format
    image: linuxkit/format:3648c589de02c27a98fe4cbdfa4c890f45aaa121
  - name: mount
    image: linuxkit/mount:fb8f153ac0d83d01dee58a7c720e243dca3593fe
    command: ["/usr/bin/mountie", "/var/lib"]
  # make a swap file on the mounted disk
  - name: swap
    image: linuxkit/swap:610bf0b64eb3c4f40ee3aa05bec7ea60fbf4edd2
    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:fc2b5bf40b13df746ee66f354672bf687a540ce8
    command: ["/sbin/dhcpcd", "--nobackground", "-f", "/dhcpcd.conf", "-1"]
services:
  # Enable acpi to shutdown on power events
  - name: acpid
    image: linuxkit/acpid:2c1339e3731efd298f22c33a3978d9cc58b9d9f1
  # Enable getty for easier debugging
  - name: getty
    image: linuxkit/getty:d421b06d0a1ae118e2af025cb7a3637f808a755b
    env:
        - INSECURE=true
  # Run ntpd to keep time synchronised in the VM
  - name: ntpd
    image: linuxkit/openntpd:d2b58cb5d776f9e56cf34d8ba301a3e64c16355c
  # VSOCK to unix domain socket forwarding. Forwards guest /var/run/docker.sock
  # to a socket on the host.
  - name: vsudd
    image: linuxkit/vsudd:dcfafdda35fdd51a31cf30dcf0eeb2e641bf37c6
    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:83a7899b338966f8b7c2ddba5fe50f7814c640b6
    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:d6229f9e9f994bfa2c2b4e6011cebcd1a7d2f0ef
  # When the host resumes from sleep, force a clock resync
  - name: host-timesync-daemon
    image: linuxkit/host-timesync-daemon:5ba3cd8c7b03b2aa9133a4be3842d8c28dbb756f
  # 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"]