docker 集群创建失败 "remaining connection slots are reserved..."

docker swarm creation fails with "remaining connection slots are reserved..."

遵循 OSX 的初学者文档:

# Terminal started via Docker Quickstart Terminal app.
$ docker-machine create -d virtualbox local
$ eval "$(docker-machine env local)"
$ docker run swarm create

结果 pq: remaining connection slots are reserved for non-replication superuser connections

$ docker --version
# Docker version 1.9.1, build a34a1d5
$ docker run swarm --version
# swarm version 1.0.0 (087e245)

# Virtualbox version 5.0.10 r104061
# OSX 10.11.1 (15B42)

知道我做错了什么或需要如何更新文档吗?

集群发现服务目前似乎已关闭。

参见:http://status.docker.com/

另外:https://github.com/docker/swarm/issues/1503