"Connection refused" running docker-osx-dev with docker-machine

docker-osx-dev cannot connect to my docker-machine to be able to rsync files.

I'm on OSX 10.11.2, using docker-machine, not boot2docker.

Relevant output when running docker-osx-dev -l DEBUG

2016-04-10 20:38:30 [DEBUG] Starting sync paths: /Users/snipped/foo
2016-04-10 20:38:30 [DEBUG] rsync --archive --log-format 'Syncing %n: %i' --delete --omit-dir-times --inplace --whole-file -l --rsh="ssh -i /Users/snipped/.docker/machine/machines/default/id_rsa -o IdentitiesOnly=yes -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null" /Users/snipped/foo docker@:/Users/snipped 2>&1 | grep -v "^Warning: Permanently added"
2016-04-10 20:38:30 [INFO] ssh: connect to host  port 22: Connection refused
2016-04-10 20:38:30 [INFO] rsync: connection unexpectedly closed (0 bytes received so far) [sender]
2016-04-10 20:38:30 [INFO] rsync error: error in rsync protocol data stream (code 12) at /BuildRoot/Library/Caches/com.apple.xbs/Sources/rsync/rsync-47/rsync/io.c(453) [sender=2.6.9]
2016-04-10 20:38:30 [INFO] Initial sync done
2016-04-10 20:38:30 [INFO] Watching: /Users/snipped/foo

This part of the rsync command looks like the IP address got truncated: docker@:/Users/snipped

My docker-machine inspect doesn't return an IPAddress. Could be related to docker-machine issue 1041

not all drivers expose an IP Address, and to make matters worse, those that do sometimes spell IPAddress differently.

$ docker-machine inspect
{
    "ConfigVersion": 3,
    "Driver": {
        "IPAddress": "",
        "MachineName": "default",
        "SSHUser": "docker",
        ...

This command works, though:

$ docker-machine ip
192.168.99.100

Maybe tweaking this line of docker-osx-dev to use docker-machine ip will fix the issue:

DOCKER_HOST_IP=$(inspect_docker_machine "{{.Driver.IPAddress}}" || inspect_docker_machine "{{.Driver.Driver.IPAddress}}")

brikis98 / docker-osx-dev

"Connection refused" running docker-osx-dev with docker-machine #183