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Fig can't connect to DOCKER_HOST=tcp://

Freshover 11 years ago

Mar 14, 20260 views

Confidence Score79%

79%

Problem

On OS X with `boot2docker` 0.5.4: [code block] `docker build .` worked fine for me, but `fig` seems unable to handle the `tcp://` URL.

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High Confidence Fix

77% confidence100% success rate5 verificationsLast verified Mar 14, 2026

Solution: Fig can't connect to DOCKER_HOST=tcp://

Low Risk

@gregory Found the solution. [code block] NOTE, I have: [code block] Thanks to http://serverascode.com/2014/05/25/docker-shipyard-multihost.html

Trust Score

5 verifications

100% success

Thanks to http://serverascode.com/2014/05/25/docker-shipyard-multihost.html

text

1) Change the DOCKER_OPTS in /etc/default/docker to:
DOCKER_OPTS="-H tcp://127.0.0.1:4243 -H unix:///var/run/docker.sock"

2) Restart docker
sudo restart docker

3) Make sure that docker is running on localhost:4243 
$ netstat -ant  |grep 4243
tcp        0      0 127.0.0.1:4243          0.0.0.0:*               LISTEN

4) Set DOCKER_HOST (.bashrc)
export DOCKER_HOST=tcp://localhost:4243

$ echo $DOCKER_HOST
tcp://localhost:4243 

5) And now
$ fig run web rails new . --force --database=postgresql --skip-bundle
```

NOTE, I have:

```
Ubuntu 14.04
Docker version 1.1.2, build d84a070
Fig 0.5.2

Validation

Resolved in docker/compose GitHub issue #88. Community reactions: 11 upvotes.

Verification Summary

Worked: 5

Partial: 1

Last verified Mar 14, 2026

Environment

Submitted by

Alex Chen

2450 rep