glenux/vagrant-lxc-ng
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👋 spike

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This commit is contained in:
Fabio Rehm 2013-03-08 04:31:28 -03:00
parent 6038545186
commit 3e7488f613
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#!/usr/bin/env ruby
require 'rubygems'
require 'log4r'
require 'yaml'
require 'shellwords'
require 'optparse'
require 'net/ssh'
# Based on actions available to the VirtualBox provider:
# https://github.com/mitchellh/vagrant/tree/master/plugins/providers/virtualbox
class Provider
WAIT = 5
def initialize(config)
@config = config
@logger = Log4r::Logger.new("vagrant::provider::lxc")
@logger.outputters = Log4r::Outputter.stdout
if config['output']
@logger.outputters << Log4r::FileOutputter.new('output', 'filename' => config['output'])
end
# @logger.level = Log4r::INFO
end
# @see Vagrant::Plugin::V1::Provider#action
def action(name, *args)
# Attempt to get the action method from this class if it
# exists, otherwise return nil to show that we don't support the
# given action.
action_method = "action_#{name}"
return send(action_method, *args) if respond_to?(action_method)
nil
end
protected
def run(cmd)
@logger.debug "Running: #{cmd}"
system cmd
end
def action_up
was_created = container_created?
if was_created
@logger.info("Container already created, moving on...")
else
@logger.info("Creating container...")
# TRY: run 'sudo lxc-create -t ubuntu -n vagrant-container -b vagrant'
# DISCUSS: Copy key directly to /var/lib/lxc/$host/root/.ssh/authorized_keys to be generic?
unless run 'sudo lxc-create -t ubuntu-cloud -n vagrant-container -- -S /home/vagrant/.ssh/id_rsa.pub'
puts 'Error creating box'
exit 1
end
unless container_created?
puts 'Error creating container'
exit 1
end
end
if container_started?
@logger.info('Container already started')
else
share_folders
@logger.info('Starting container...')
unless run "sudo lxc-start -n vagrant-container -d #{configs}"# -o /tmp/lxc-start.log -l DEBUG"
puts 'Error starting container!'
exit 1
end
run 'sudo lxc-wait --name vagrant-container --state RUNNING'
unless container_started?
puts 'Error starting container!'
exit 1
end
@logger.info('Container started')
forward_ports
unless was_created
@logger.debug "Waiting #{WAIT} seconds before setting up vagrant user"
sleep WAIT
setup_vagrant_user
end
end
end
def action_halt
if container_started?
@logger.info('Stopping container...')
unless run 'sudo lxc-shutdown -n vagrant-container'
puts 'Error halting container!'
exit 1
end
run 'sudo lxc-wait --name vagrant-container --state STOPPED'
if container_started?
puts 'Error halting container!'
exit 1
end
@logger.info('Container halted')
else
@logger.info('Container already halted')
end
end
def action_destroy
if container_created?
if container_started?
action_halt
@logger.debug "Waiting #{WAIT} seconds to proceed with destroy..."
sleep WAIT
end
@logger.info("Destroying container...")
unless run 'sudo lxc-destroy -n vagrant-container'
puts 'Error destroying container'
exit 1
end
if container_created?
puts 'Error destroying container'
exit 1
end
@logger.debug "Waiting #{WAIT} seconds for things to settle down..."
sleep WAIT
@logger.info("Container destroyed")
else
@logger.info("Container not created")
end
end
def action_reload
action_halt if container_started?
action_up
end
# TODO: Switch over to Net:SSH
def action_ssh(opts = {'user' => 'vagrant'})
# FIXME: We should not depend on an IP to be configured
raise 'SSH support is currently available to a predefined IP only' unless @config['ip']
cmd = "ssh #{opts['user']}@#{@config['ip']} -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o LogLevel=quiet"
cmd << " -- #{Shellwords.escape opts['command']}" if opts['command']
unless run(cmd)
puts 'Error running ssh command!'
exit 1
end
end
def setup_vagrant_user
unless @config['ip']
# FIXME: Need to find a way to grab the container IP
@logger.warn('Unfortunately automatic vagrant user setup does not work unless an IP is specified')
return
end
@logger.info 'Setting up vagrant user'
# TODO: We could try to use lxc-attach instead of SSH
# Based on:
# https://github.com/jedi4ever/veewee/blob/master/templates/ubuntu-12.10-server-amd64-packages/vagrant.sh
cmds = [
#'groupadd -r admin',
'useradd -d /home/vagrant -m vagrant -r -s /bin/bash',
'usermod -a -G admin vagrant',
'cp /etc/sudoers /etc/sudoers.orig',
'sed -i -e \'/Defaults\s\+env_reset/a Defaults\texempt_group=admin\' /etc/sudoers',
'sed -i -e \'s/%admin\s\+ALL=(ALL)\s\+ALL/%admin ALL=NOPASSWD:ALL/g\' /etc/sudoers',
'service sudo restart',
'-u vagrant -- mkdir -p /home/vagrant/.ssh',
'-u vagrant -- curl -o /home/vagrant/.ssh/authorized_keys https://raw.github.com/mitchellh/vagrant/master/keys/vagrant.pub'
]
# FIXME: Needs to abort the process if any of this commands fail
ssh_conn('ubuntu') do |ssh|
cmds.each do |cmd|
@logger.debug "SSH: sudo #{cmd}"
ssh.exec!("sudo #{cmd}")
end
end
end
def ssh_conn(user = 'vagrant')
Net::SSH.start(@config['ip'], user, :user_known_hosts_file => '/dev/null') do |ssh|
yield ssh
end
end
def container_created?
`lxc-ls` =~ /^vagrant\-container/
end
def container_started?
`sudo -- lxc-info -n vagrant-container` =~ /RUNNING/
end
def share_folders
@logger.info('Setting up shared folders...')
mount_folder(File.expand_path('.'), '/vagrant')
Array(@config['shared_folders']).each do |folder|
mount_folder(folder['source'], folder['destination'])
end
end
def mount_folder(source, destination)
@logger.info("Sharing #{source} as #{destination}")
run <<STR
sudo mount --bind #{source} #{source}
sudo mount --make-unbindable #{source}
sudo mount --make-shared #{source}
if ! [ -d /var/lib/lxc/vagrant-container/rootfs#{destination} ]; then
sudo mkdir -p /var/lib/lxc/vagrant-container/rootfs#{destination}
fi
if ! $(sudo grep -q '#{source} /var/lib/lxc/vagrant-container/rootfs#{destination}' /var/lib/lxc/vagrant-container/fstab); then
cat <<EOF | sudo tee -a /var/lib/lxc/vagrant-container/fstab
#{source} /var/lib/lxc/vagrant-container/rootfs#{destination} none bind 0 0
EOF
fi
STR
end
def configs
configs = []
configs << "-s lxc.network.ipv4='#{@config['ip']}'" if @config['ip']
configs << '-s lxc.cgroup.memory.limit_in_bytes=400M'
configs << '-s lxc.cgroup.memory.memsw.limit_in_bytes=500M'
configs.join(' ')
end
def forward_ports
return unless @config.key?('forwards')
@logger.info('Forwarding ports...')
forwards = ''
@config['forwards'].each do |forward|
host_port, guest_port = forward
@logger.info("-- #{guest_port} => #{host_port}")
forwards << "0.0.0.0 #{host_port} #{@config['ip']} #{guest_port}"
end
# FIXME: We should be nice to others and not overwrite the config all the time ;)
File.open('/etc/rinetd.conf', 'w') do |f|
f.puts forwards
f.puts 'logfile /var/log/rinetd.log'
end
@logger.info('Restarting rinetd')
`sudo service rinetd restart`
end
end
raise 'You need to provide an action' unless ARGV[0]
action = ARGV.shift.to_sym
if action == :ssh
options = {'user' => 'vagrant'}
OptionParser.new do |opts|
opts.on("-c", '--command [COMMAND]') { |v| options['command'] = v }
opts.on('-u', '--user [USER]') { |v| options['user'] = v }
end.parse!
arguments = [options]
else
init_options = {}
OptionParser.new do |opts|
opts.on("-o", '--output [FILE]') { |v| init_options['output'] = v }
end.parse!
end
config = YAML.load File.open('./config.yml') if File.exists? './config.yml'
config ||= {}
config['output'] = init_options.delete('output') if init_options && init_options.key?('output')
@provider = Provider.new(config || {})
@provider.action(action, *(arguments || []))