Class: DevLXC::Container

Inherits:
LXC::Container
  • Object
show all
Defined in:
lib/dev-lxc/container.rb

Instance Method Summary collapse

Instance Method Details

#bootstrap_container(base_container_name = nil, version = nil, run_list = nil, chef_server_url, validation_client_name, validation_key) ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 174

def bootstrap_container(base_container_name=nil, version=nil, run_list=nil, chef_server_url, validation_client_name, validation_key)
  puts "Bootstrapping container '#{self.name}' for Chef Server '#{chef_server_url}'"
  if base_container_name
    if self.defined?
      puts "WARN: Skipping cloning. Container '#{self.name}' already exists"
    else
      puts "Cloning base container '#{base_container_name}' into container '#{self.name}'"
      base_container = DevLXC::Container.new(base_container_name)
      unless base_container.defined?
        puts "ERROR: Base container '#{base_container_name} does not exist"
        exit 1
      end
      base_container.clone(self.name, {:flags => LXC::LXC_CLONE_SNAPSHOT})
      self.load_config
    end
  end
  self.start unless self.running?
  self.install_chef_client(version)
  self.configure_chef_client(chef_server_url, validation_client_name, validation_key)

  chef_client_command = "chef-client"
  chef_client_command += " -r #{run_list}" if run_list
  self.run_command(chef_client_command)
end

#configure_chef_client(chef_server_url, validation_client_name, validation_key) ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 151

def configure_chef_client(chef_server_url, validation_client_name, validation_key)
  unless self.defined?
    puts "ERROR: Container '#{self.name}' does not exist."
    exit 1
  end

  puts "Configuring Chef Client in container '#{self.name}' for Chef Server '#{chef_server_url}'"

  FileUtils.mkdir_p("#{config_item('lxc.rootfs')}/etc/chef")

  client_rb = %Q(chef_server_url '#{chef_server_url}'
validation_client_name '#{validation_client_name}'
ssl_verify_mode :verify_none
)
  IO.write("#{config_item('lxc.rootfs')}/etc/chef/client.rb", client_rb)

  begin
    FileUtils.cp(validation_key, "#{config_item('lxc.rootfs')}/etc/chef/validation.pem")
  rescue Errno::ENOENT
    puts "ERROR: The validation key '#{validation_key}' does not exist."
  end
end

#destroy ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 40

def destroy
  stop if running?
  puts "Destroying container '#{self.name}'"
  super if self.defined?
end

#install_chef_client(version = nil) ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 95

def install_chef_client(version=nil)
  unless self.defined?
    puts "ERROR: Container '#{self.name}' does not exist."
    exit 1
  end
  unless running?
    puts "ERROR: Container '#{self.name}' is not running"
    exit 1
  end
  if self.ip_addresses.empty?
    puts "ERROR: Container '#{self.name}' network is not available."
    exit 1
  end

  require 'tempfile'

  installed_version = nil
  file = Tempfile.new('installed_chef_client_version')
  begin
    attach_opts = { wait: true, env_policy: LXC::LXC_ATTACH_CLEAR_ENV, extra_env_vars: ['HOME=/root'], stdout: file }
    attach(attach_opts) do
      puts `chef-client -v`
    end
    file.rewind
    installed_version = Regexp.last_match[1] if file.read.match(/chef:\s*(\d+\.\d+\.\d+)/i)
  ensure
    file.close
    file.unlink
  end
  if installed_version.nil? || ( ! version.nil? && ! installed_version.start_with?(version) )
    require "net/https"
    require "uri"

    uri = URI.parse("https://www.chef.io/chef/install.sh")
    http = Net::HTTP.new(uri.host, uri.port)
    http.use_ssl = true

    request = Net::HTTP::Get.new(uri.request_uri)

    response = http.request(request)

    file = Tempfile.new('install_sh', "#{config_item('lxc.rootfs')}/tmp")
    file.write(response.body)
    begin
      version = 'latest' if version.nil?
      install_command = "bash /tmp/#{File.basename(file.path)} -v #{version}"
      run_command(install_command)
    ensure
      file.close
      file.unlink
    end
  else
    puts "Chef #{installed_version} is already installed."
  end
end

#install_package(package_path) ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 80

def install_package(package_path)
  unless run_command("test -e #{package_path}") == 0
    puts "ERROR: File #{package_path} does not exist in container '#{self.name}'"
    exit 1
  end
  puts "Installing #{package_path} in container '#{self.name}'"
  case File.extname(package_path)
  when ".deb"
    install_command = "dpkg -D10 -i #{package_path}"
  when ".rpm"
    install_command = "rpm -Uvh #{package_path}"
  end
  run_command(install_command)
end

#run_command(command) ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 69

def run_command(command)
  unless running?
    puts "ERROR: Container '#{self.name}' must be running first"
    exit 1
  end
  attach_opts = { wait: true, env_policy: LXC::LXC_ATTACH_CLEAR_ENV, extra_env_vars: ['HOME=/root'] }
  attach(attach_opts) do
    LXC.run_command(command)
  end
end

#start ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 13

def start
  unless self.defined?
    puts "ERROR: Container '#{self.name}' does not exist."
    exit 1
  end
  puts "Starting container '#{self.name}'"
  super
  wait(:running, 3)
  puts "Waiting for '#{self.name}' container's network"
  ips = nil
  30.times do
    ips = self.ip_addresses
    break unless ips.empty?
    sleep 1
  end
  if ips.empty?
    puts "ERROR: Container '#{self.name}' network is not available."
    exit 1
  end
end

#status ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 3

def status
  if self.defined?
    state = self.state
    ip_addresses = self.ip_addresses.join(" ") if self.state == :running
  else
    state = "not_created"
  end
  { 'name' => self.name, 'state' => state, 'ip_addresses' => ip_addresses }
end

#stop ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 34

def stop
  puts "Stopping container '#{self.name}'"
  super
  wait("STOPPED", 3)
end

#sync_mounts(mounts) ⇒ Object 



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# File 'lib/dev-lxc/container.rb', line 46

def sync_mounts(mounts)
  existing_mounts = self.config_item("lxc.mount.entry")
  unless existing_mounts.nil?
    preserved_mounts = existing_mounts.delete_if { |m| m.end_with?("## dev-lxc ##") }
    self.clear_config_item('lxc.mount.entries')
    self.set_config_item("lxc.mount.entry", preserved_mounts)
  end
  mounts.each do |mount|
    unless File.exists?(mount.split.first)
      puts "ERROR: Mount source #{mount.split.first} does not exist."
      exit 1
    end
    if ! preserved_mounts.nil? && preserved_mounts.any? { |m| m.start_with?("#{mount} ") }
      puts "Skipping mount entry #{mount}, it already exists"
      next
    else
      puts "Adding mount entry #{mount}"
      self.set_config_item("lxc.mount.entry", "#{mount} none bind,optional,create=dir 0 0     ## dev-lxc ##")
    end
  end
  self.save_config
end