Suggest dynamic config in boot2docker shellinit

[kevinSuttle]

For people like me who jump back and forth between VPN, firewalls, etc, setting the proper environment variable value for $DOCKER_HOST can be a pain because of DHCP.

I use fish, so this was my solution.

In config.fish:

set -x DOCKER_HOST tcp://(boot2docker ip):2376
set -x DOCKER_CERT_PATH /Users/(whoami)/.boot2docker/certs/boot2docker-vm

In more common shells like bash and zsh, you can just add a $.

set -x DOCKER_HOST tcp://$(boot2docker ip):2376
set -x DOCKER_CERT_PATH /Users/$(whoami)/.boot2docker/certs/boot2docker-vm

boot2docker shellinit should provide something like this to make the setup more dynamic and flexible.

[kevinSuttle]

This gets weird because of what I suspect is another bug. Trying to install https://github.com/codeclimate/codeclimate and I happened to get this bug.

❯ brew install codeclimate                                                                              12:40:53 PM
==> Installing codeclimate from codeclimate/homebrew-formulae
==> Downloading https://github.com/codeclimate/codeclimate/archive/v0.0.7.tar.gz
Already downloaded: /Library/Caches/Homebrew/codeclimate-0.0.7.tar.gz
==> env PATH=/usr/local/bin:/usr/local/Library/ENV/4.3:/usr/bin:/bin:/usr/sbin:/sbin PREFIX=/usr/local/Cellar/codecl
bin/check
An error occurred trying to connect: Get https://192.168.59.103:2376/v1.19/version: x509: certificate is valid for 127.0.0.1, 10.0.2.15, not 192.168.59.103
Unable to run `docker version', the docker daemon may not be running
Please ensure `boot2docker up' succeeds and you've run `boot2docker shellinit' in this shell
make: *** [install] Error 1

❯ boot2docker shellinit                                                                                 12:47:46 PM
Writing /Users/kevinsuttle/.boot2docker/certs/boot2docker-vm/ca.pem
Writing /Users/kevinsuttle/.boot2docker/certs/boot2docker-vm/cert.pem
Writing /Users/kevinsuttle/.boot2docker/certs/boot2docker-vm/key.pem
    set -x DOCKER_HOST tcp://192.168.59.103:2376
    set -x DOCKER_CERT_PATH /Users/kevinsuttle/.boot2docker/certs/boot2docker-vm
    set -x DOCKER_TLS_VERIFY 1

/Users/kevinsuttle
❯ boot2docker ip                                                                                        12:47:50 PM
192.168.59.103

Couple of things:

1. The success of boot2docker up and boot2docker shellinit can be automated and checked programmatically.

Please ensureboot2docker up' succeeds and you've run boot2docker shellinit' in this shell.

1. Both DOCKER_HOST and boot2docker ip report being set to 192.168.59.103, so the above error shouldn't be true.