227 lines
8.7 KiB
Markdown
227 lines
8.7 KiB
Markdown
# vagrant-lxc [](https://travis-ci.org/fgrehm/vagrant-lxc) [](http://badge.fury.io/rb/vagrant-lxc) [](https://codeclimate.com/github/fgrehm/vagrant-lxc) [](https://coveralls.io/r/fgrehm/vagrant-lxc)
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Linux Containers support for Vagrant 1.1+
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Check out this [blog post](http://fabiorehm.com/blog/2013/04/28/lxc-provider-for-vagrant)
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to see the plugin in action and find out more about it.
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## Dependencies
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* Vagrant 1.1+ (1.1.3+ recommended)
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* lxc 0.7.5+ (0.8.0-rc1+ recommended)
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* redir (if you are planning to use port forwarding)
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* A Kernel [higher than 3.5.0-17.28](#help-im-unable-to-restart-containers)
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On a clean Ubuntu 12.10 machine it means something like:
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```
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sudo apt-get update && sudo apt-get dist-upgrade
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sudo apt-get install lxc redir
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# Downloads and install Vagrant 1.1.5
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wget "http://files.vagrantup.com/packages/64e360814c3ad960d810456add977fd4c7d47ce6/vagrant_`uname -m`.deb" -O /tmp/vagrant.deb
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sudo dpkg -i /tmp/vagrant.deb
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```
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## Installation
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```
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vagrant plugin install vagrant-lxc
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```
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## Usage
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After installing, add a [base box](#available-boxes) using any name you want, for example:
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```
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vagrant box add lxc-quantal64 http://dl.dropbox.com/u/13510779/lxc-quantal-amd64-2013-05-06.box
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```
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Make a Vagrantfile that looks like the following, filling in your information where necessary:
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```ruby
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Vagrant.configure("2") do |config|
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# Change it to the name of the box you have just added
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config.vm.box = "lxc-quantal64"
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# You can omit this block if you don't need to override any container setting
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config.vm.provider :lxc do |lxc|
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# OPTIONAL: Same effect as as 'customize ["modifyvm", :id, "--memory", "1024"]' for VirtualBox
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lxc.customize 'cgroup.memory.limit_in_bytes', '1024M'
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# OPTIONAL: Limits swap size
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lxc.customize 'cgroup.memory.memsw.limit_in_bytes', '512M'
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end
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end
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```
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And finally run `vagrant up --provider=lxc`. If you are using Vagrant 1.2+ you can
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also set `VAGRANT_DEFAULT_PROVIDER` environmental variable to `lxc`.
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If you are on a mac or window host and still want to try this plugin out, you
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can use the [same Vagrant VirtualBox machine I use for development](#using-virtualbox-for-development).
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### Available boxes
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| LINK | DESCRIPTION |
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| --- | --- |
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| [lxc-raring-amd64-2013-05-08.box](http://dl.dropbox.com/u/13510779/lxc-raring-amd64-2013-05-08.box) | Ubuntu 13.04 Raring x86_64 (Puppet 3.1.1) |
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| [lxc-quantal-amd64-2013-05-08.box](http://dl.dropbox.com/u/13510779/lxc-quantal-amd64-2013-05-08.box) | Ubuntu 12.10 Quantal x86_64 (Puppet 3.1.1 & Chef 11.4.0) |
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| [lxc-precise-amd64-2013-05-08.box](http://dl.dropbox.com/u/13510779/lxc-precise-amd64-2013-05-08.box) | Ubuntu 12.04 Precise x86_64 (Puppet 3.1.1 & Chef 11.4.0) |
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| [lxc-sid-amd64-2013-05-08.box](http://dl.dropbox.com/u/13510779/lxc-sid-amd64-2013-05-08.box) | Debian Sid (Puppet 3.1.1) |
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| [lxc-wheezy-amd64-2013-05-08.box](http://dl.dropbox.com/u/13510779/lxc-wheezy-amd64-2013-05-08.box) | Debian Wheezy (Puppet 3.1.1) |
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| [lxc-squeeze-amd64-2013-05-08.box](http://dl.dropbox.com/u/13510779/lxc-squeeze-amd64-2013-05-08.box) | Debian Squeeze (Puppet 3.1.1) |
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*Please note that I'm currently using only the quantal x86_64 on a daily basis,
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and I've only done some basic testing with the others*
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There is a set of [rake tasks](tasks/boxes.rake) that you can use to build base
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boxes as needed. By default it won't include any provisioning tool and you can
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pick the one you want by providing some environment variables.
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For example:
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```
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CHEF=1 rake boxes:ubuntu:build:precise64
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```
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Will build a Ubuntu Precise x86_64 box with chef pre-installed.
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### Storing container's rootfs on a separate partition
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Before the 0.3.0 version of this plugin, there used to be a support for specifying
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the container's rootfs path from the `Vagrantfile`, on 0.3.0 this was removed as you
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can achieve the same effect by symlinking or mounting `/var/lib/lxc` on a separate
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partition.
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### NFS shared folders
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NFS shared folders are not supported and will behave as a "normal" shared folder
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so we can share the same Vagrantfile with VBox environments.
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## What is currently supported?
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Pretty much everything you need from Vagrant:
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* Vagrant's `up`, `halt`, `reload`, `destroy`, `ssh` and `package` commands (box packaging is kind of experimental)
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* Shared folders
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* Provisioning
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* Setting container's host name
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* Port forwarding
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*Please refer to the [closed issues](https://github.com/fgrehm/vagrant-lxc/issues?labels=&milestone=&page=1&state=closed)
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and the [changelog](CHANGELOG.md) for most up to date information.*
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## Current limitations
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* Does not detect forwarded ports collision, right now you are responsible for taking care of that
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* A hell lot of `sudo`s (this will probably be like this until [user namespaces](http://s3hh.wordpress.com/2013/02/12/user-namespaces-lxc-meeting/) are supported)
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* [Does not tell you if dependencies are not met](https://github.com/fgrehm/vagrant-lxc/issues/11)
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(will probably just throw up some random error)
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* + bunch of other [core features](https://github.com/fgrehm/vagrant-lxc/issues?labels=core&milestone=&page=1&state=open)
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and some known [bugs](https://github.com/fgrehm/vagrant-lxc/issues?labels=bug&page=1&state=open)
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## Development
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If want to develop from your physical machine, just sing that same old song:
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```
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git clone git://github.com/fgrehm/vagrant-lxc.git
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cd vagrant-lxc
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bundle install
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bundle exec rake # to run unit specs
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```
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To run acceptance specs, you'll have to ssh into one of the [development boxes](development/Vagrantfile) and run:
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```
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bundle exec rake spec:acceptance
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```
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To build the provided quantal64 box:
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```
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bundle exec rake boxes:quantal64:build
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vagrant box add quantal64 boxes/output/lxc-quantal64.box
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```
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### Using `vagrant-lxc` to develop itself
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Yes! The gem has been [bootstrapped](http://en.wikipedia.org/wiki/Bootstrapping_(compilers)
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and since you can boot a container from within another, after cloning the
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project you can run the commands below from the host machine to get a container
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ready for development:
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```sh
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# Required in order to allow nested containers to be started
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sudo apt-get install apparmor-utils
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sudo aa-complain /usr/bin/lxc-start
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bundle install
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cd development
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bundle exec vagrant up lxc --provider=lxc
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bundle exec vagrant ssh lxc
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```
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That should result in a container ready to be `bundle exec vagrant ssh`ed.
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Once you've SSH into the guest container, you'll be already on the project's root.
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Keep in mind that you'll probably need to run `sudo aa-complain /usr/bin/lxc-start`
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on the host whenever you want to hack on it, otherwise you won't be able to
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start nested containers there to try things out.
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### Using VirtualBox for development
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```
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cd development
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bundle exec vagrant up vbox
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# A reload is needed to ensure the updated kernel gets loaded
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bundle exec vagrant reload vbox
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bundle exec vagrant ssh vbox
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```
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## Protips
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If you want to find out more about what's going on under the hood on vagrant,
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prepend `VAGRANT_LOG=debug` to your `vagrant` commands. For `lxc-start`s
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debugging set `LXC_START_LOG_FILE`:
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```
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LXC_START_LOG_FILE=/tmp/lxc-start.log VAGRANT_LOG=debug vagrant up
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```
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This will output A LOT of information on your terminal and some useful information
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about `lxc-start` to `/tmp/lxc-start.log`.
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## Help! I'm unable to restart containers!
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It happened to me quite a few times in the past and it seems that it is related
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to a bug on linux kernel, so make sure you are using a bug-free kernel
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(>= 3.5.0-17.28). More information can be found on:
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* https://bugzilla.kernel.org/show_bug.cgi?id=47181
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* https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1021471
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* https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1065434
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Sometimes the dev boxes I'm using are not able to `lxc-start` containers
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anymore. Most of the times it was an issue with the arguments I provided
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to it for customization (or a *buggy* kernel). If you run into that, rollback your changes
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and try to `vagrant reload` the dev box. If it still doesn't work,
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please file a bug at the [issue tracker](https://github.com/fgrehm/vagrant-lxc/issues).
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## Similar projects
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* [vagabond](https://github.com/chrisroberts/vagabond) - "a tool integrated with Chef to build local nodes easily"
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* [vagueant](https://github.com/neerolyte/vagueant) - "vaguely like Vagrant for linux containers (lxc)"
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## Contributing
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1. Fork it
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2. Create your feature branch (`git checkout -b my-new-feature`)
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3. Commit your changes (`git commit -am 'Add some feature'`)
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4. Push to the branch (`git push origin my-new-feature`)
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5. Create new Pull Request
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