Class: OsCtld::Daemon

Inherits:
Object
  • Object
show all
Includes:
OsCtl::Lib::Utils::Log, OsCtl::Lib::Utils::System, Assets::Definition
Defined in:
lib/osctld/daemon.rb

Defined Under Namespace

Classes: ClientHandler

Constant Summary collapse

SOCKET = 
File.join(RunState::RUNDIR, 'osctld.sock')
@@instance = 
nil

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Assets::Definition

#define_assets

Instance Attribute Details

#config ⇒ Config (readonly)

Returns:



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# File 'lib/osctld/daemon.rb', line 71

def config
  @config
end

#initialized ⇒ Boolean (readonly)

Returns:

  • (Boolean) 


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# File 'lib/osctld/daemon.rb', line 77

def initialized
  @initialized
end

#started_at ⇒ Time (readonly)

Returns:

  • (Time) 


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# File 'lib/osctld/daemon.rb', line 74

def started_at
  @started_at
end

Class Method Details

.create(config) ⇒ Object

Parameters:

  • config (String) —

    path to config file



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# File 'lib/osctld/daemon.rb', line 59

def create(config)
  fail 'Daemon already instantiated' if @instance

  @@instance = new(config)
end

.get ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 65

def get
  @@instance
end

Instance Method Details

#abort_shutdown ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 241

def abort_shutdown
  @abort_shutdown = true

  begin
    File.unlink(RunState::SHUTDOWN_MARKER)
  rescue Errno::ENOENT
  end
end

#abort_shutdown? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/osctld/daemon.rb', line 262

def abort_shutdown?
  @abort_shutdown
end

#assets ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 182

def assets
  define_assets do |add|
    RunState.assets(add)

    add.socket(
      SOCKET,
      desc: 'Management socket',
      user: 0,
      group: 0,
      mode: 0600
    )

    Devices::V2::BpfProgramCache.assets(add)
  end
end

#begin_shutdown ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 236

def begin_shutdown
  @abort_shutdown = false
  File.open(RunState::SHUTDOWN_MARKER, 'w', 0000){}
end

#confirm_shutdown ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 250

def confirm_shutdown
  unless File.exist?(RunState::SHUTDOWN_MARKER)
    File.open(RunState::SHUTDOWN_MARKER, 'w', 0100){}
  end

  File.chmod(0100, RunState::SHUTDOWN_MARKER)
end

#join_server ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 210

def join_server
  @server_thread.join
end

#log_type ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 266

def log_type
  'daemon'
end

#serve ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 198

def serve
  @server_thread = Thread.new do
    log(:info, "Listening on control socket at #{SOCKET}")

    socket = UNIXServer.new(SOCKET)
    File.chmod(0600, SOCKET)

    @server = Generic::Server.new(socket, Daemon::ClientHandler)
    @server.start
  end
end

#setup ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 111

def setup
  # Setup /run/osctl
  RunState.create

  # Open start config
  start_cfg = RunState.open_start_config

  SystemLimits.instance

  CpuScheduler.setup
  Lxcfs::Scheduler.setup

  # Increase allowed number of open files
  PrLimits.set(Process.pid, PrLimits::NOFILE, 131072, 131072)

  # Setup shared AppArmor files
  if AppArmor.enabled?
    log(:info, 'AppArmor enabled')
    AppArmor.setup
  else
    log(:info, 'AppArmor disabled')
  end

  # Setup BPF FS
  BpfFs.setup

  # User-control supervisor
  UserControl::Supervisor.instance

  # Send/Receive hooks and server
  SendReceive.setup

  # Setup network interfaces
  NetInterface.setup

  # Start accepting client commands
  serve

  # Load data pools
  if KernelParams.import_pools?
    autostart = KernelParams.autostart_cts?

    Commands::Pool::Import.run(all: true, autostart: autostart)

    unless autostart
      log(:info, 'Container autostart disabled by kernel parameter')
    end
  else
    log(:info, 'Pool autoimport disabled by kernel parameter')
  end

  # Resume shutdown
  if shutdown?
    log(:info, 'Resuming shutdown')
    Commands::Self::Shutdown.run

  elsif start_cfg.activate_lxcfs?
    log(:info, 'Activating LXCFS')
    Commands::Self::Activate.run(lxcfs: true)
  end

  # Close start config
  start_cfg.close

  # All components are up
  @initialized = true

  # Wait for the server to finish
  join_server
end

#shutdown? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/osctld/daemon.rb', line 258

def shutdown?
  File.exist?(RunState::SHUTDOWN_MARKER)
end

#stop ⇒ Object 



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# File 'lib/osctld/daemon.rb', line 214

def stop
  @stopping = true
  log(:info, 'Stopping daemon')
  Eventd.shutdown
  @server.stop if @server
  File.unlink(SOCKET) if File.exist?(SOCKET)
  UserControl.stop
  SendReceive.stop
  DB::Pools.get.each { |pool| pool.stop }
  Lxcfs::Scheduler.stop
  CpuScheduler.shutdown
  ThreadReaper.stop
  Monitor::Master.stop
  LockRegistry.stop
  log(:info, 'Daemon stopped successfully')
  exit(false)
end

#stopping? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/osctld/daemon.rb', line 232

def stopping?
  @stopping
end