Docker on OS X with batteries included, aimed at making a more pleasant local development experience. Runs on top of docker-machine.
- Faster volume sharing using NFS rather than built-in virtualbox/vmware file shares. A medium-sized Rails app boots in 5 seconds, rather than 30 seconds using vmware file sharing, or 90 seconds using virtualbox file sharing.
- Filesystem events work on mounted volumes. Edit files on your host, and see guard/webpack/etc pick up the changes immediately.
- Easy access to running containers using built-in DNS and HTTP proxy.
Dinghy creates its own VM using docker-machine, it will not modify your existing docker-machine VMs.
Eventually docker-machine may have a rich enough plugin system that dinghy can
just become a plugin to docker-machine. For now, dinghy runs as a wrapper
around docker-machine, shelling out to create the VM and using launchd to
start the various services such as NFS and DNS.
If you previously used a version of Dinghy that ran on top of Vagrant, read this.
First the prerequisites:
- OS X Yosemite (10.10) (Mavericks has a known issue, see #6)
- Homebrew
- Either VirtualBox or VMware Fusion.
If using VirtualBox, version 5.0+ is strongly recommended, and you'll need the VirtualBox Extension Pack installed.
Then:
$ brew install https://github.com/wjarka/dinghy/raw/latest/dinghy.rb
This will install the docker client and docker-machine using Homebrew, as well.
You can specify provider (virtualbox or vmware), memory and CPU options when creating the VM. See available options:
$ dinghy help create
Then create the VM and start services with:
$ dinghy create --provider virtualbox
Once the VM is up, you'll get instructions to add some Docker-related environment variables, so that your Docker client can contact the Docker server inside the VM. I'd suggest adding these to your .bashrc or equivalent.
Sanity check!
$ docker run -it redis
$ dinghy help
Commands:
dinghy create # create the docker-machine VM
dinghy destroy # stop and delete all traces of the VM
dinghy halt # stop the VM and services
dinghy help [COMMAND] # Describe available commands or one specific command
dinghy ip # get the VM's IP address
dinghy restart # restart the VM and services
dinghy shellinit # returns env variables to set, should be run like $(dinghy shellinit)
dinghy ssh [args...] # ssh to the VM
dinghy ssh-config # print ssh configuration for the VM
dinghy status # get VM and services status
dinghy up # start the Docker VM and services
dinghy upgrade # upgrade the boot2docker VM to the newest available
dinghy version # display dinghy versionDinghy installs a DNS server listening on the private interface, which
resolves *.docker to the Dinghy VM. For instance, if you have a running
container that exposes port 3000 to the host, and you like to call it
myrailsapp, you can connect to it at myrailsapp.docker port 3000, e.g.
http://myrailsapp.docker:3000/ or telnet myrailsapp.docker 3000.
Dinghy will run a HTTP proxy inside a docker container in the VM, giving you easy access to web apps running in other containers. This uses the excellent nginx-proxy docker tool.
The proxy will take a few moments to download the first time you launch the VM.
Any containers that you want proxied, make sure the VIRTUAL_HOST
environment variable is set, either with the -e option to docker or
the environment hash in docker-compose. For instance setting
VIRTUAL_HOST=myrailsapp.docker will make the container's exposed port
available at http://myrailsapp.docker/. If the container exposes more
than one port, set VIRTUAL_PORT to the http port number, as well.
See the nginx-proxy documentation for further details.
If you use docker-compose, you can add VIRTUAL_HOST to the environment hash in
docker-compose.yml, for instance:
web:
build: .
ports:
- "3000:3000"
environment:
VIRTUAL_HOST: myrailsapp.dockerDinghy shares your home directory (/Users/<you>) over NFS, using a
private network interface between your host machine and the Dinghy
Docker Host. This sharing is done using a separate NFS daemon, not the
system NFS daemon.
Be aware that there isn't a lot of security around NFSv3 file shares. We've tried to lock things down as much as possible (this NFS daemon doesn't even listen on other interfaces, for example).
To update Dinghy itself, run:
$ dinghy halt
$ brew reinstall https://github.com/wjarka/dinghy/raw/latest/dinghy.rb
$ dinghy up
To update the Docker VM, run:
$ dinghy upgrade
This will run docker-machine upgrade and then restart the dinghy services.
You can install Dinghy's master branch with:
$ dinghy halt
$ brew reinstall --HEAD https://github.com/wjarka/dinghy/raw/master/dinghy.rb
$ dinghy up
This branch may be less stable, so this isn't recommended in general.