config.toml

root = "/tmp/ctrd/var/lib/containerd"
state = "/tmp/ctrd/run/containerd"
oom_score = 0

[grpc]
  address = "/tmp/ctrd/run/containerd/containerd.sock"
  uid = 501
  gid = 0
  max_recv_message_size = 0
  max_send_message_size = 0

[debug]
  address = "/tmp/ctrd/run/containerd/debug.sock"
  uid = 501
  gid = 0
  level = "debug"

[metrics]
  address = ""
  grpc_histogram = false

[cgroup]
  path = ""

[plugins]
  [plugins.diff-service]
    default = ["walking"]
  [plugins.opt]
    path = "/tmp/ctrd/opt/containerd"
  [plugins.restart]
    interval = "10s"
  [plugins.scheduler]
    pause_threshold = 0.02
    deletion_threshold = 0
    mutation_threshold = 100
    schedule_delay = "0s"
    startup_delay = "100ms"
   [plugins.linux]
    shim = "containerd-shim"
    runtime = "runu"
    runtime_root = "/tmp/ctrd/rroot"
    no_shim = false
    shim_debug = true

[proxy_plugins]
  [proxy_plugins.sparsebundle]
    type = "snapshot"
    address = "/tmp/ctrd/run/containerd-darwin-snapshotter.sock"

daemon.json

{
    "debug": true,
    "experimental": true,
    "hosts": ["tcp://127.0.0.1:3939", "unix:///tmp/var/run/docker.sock"],
    "log-level": "debug",
    "data-root": "/tmp/var/lib/docker",
    "exec-root": "/tmp/var/run/docker",
    "runtimes": {
        "runu-dev": {
            "path": "/Users/travis/gopath/bin/runu",
            "runtimeArgs": [
            ]
        }
    }
}