问题
Where can I find docker daemon config file on boot2docker machine?
According to this topic: Dockerfile: Docker build can't download packages: centos->yum, debian/ubuntu->apt-get behind intranet
I want to set '--dns' in DOCKER_OPTS, but I can't find this config file either at /etc/default or anywhere else.
回答1:
Inside boot2docker (boot2docker ssh) / docker-machine (docker-machine ssh default) , open or create the file /var/lib/boot2docker/profile and add the following line:
EXTRA_ARGS="--dns 192.168.1.145"
Also works for:
EXTRA_ARGS="--insecure-registry myinternaldocker"
After the change you need to restart the docker daemon:
sudo /etc/init.d/docker restart
Or leave boot2docker / docker-machine and restart the entire virtual machine:
boot2docker restart
# for docker machine
docker-machine restart default
Information taken from: https://groups.google.com/d/msg/docker-user/04pAX57WQ7g/_LI-z8iknxYJ
Regards
回答2:
It took me quite some time to figure this out. If you are using a mac you have to go to a fresh terminal and run:
boot2docker ssh
This will open a new terminal, from there you have to edit or create a file
sudo vi /var/lib/boot2docker/profile
and add the DNS that you would like to add, for example:
DOCKER_OPTS="-dns 8.8.8.8 -dns 8.8.4.4"
After that you need to restart boot2docker. Here I had some issues at the beginning so I close everything and run in a terminal:
boot2docker down
boot2docker up
you can also use:
boot2docker restart
I had to do it twice. After that I started again using the normal boot2docker icon and everything worked.
I hope this helps.
回答3:
If you want to script things, you can do these steps on one ugly line:
boot2docker ssh 'sudo sh -c "echo \"EXTRA_ARGS=\\\"--dns 1.2.3.4\\\"\" > /var/lib/boot2docker/profile && sudo /etc/init.d/docker restart"'
来源：https://stackoverflow.com/questions/26424338/docker-daemon-config-file-on-boot2docker-docker-machine-docker-toolbox