Class: OsCtld::Container

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

Defined Under Namespace

Modules: Adaptor, Hooks Classes: Builder, DatasetBuilder, Hints, Importer, LxcConfig, Lxcfs, RawConfigs, Recovery, RunConfiguration, StartMenu

Constant Summary collapse

DEFAULT_START_TIMEOUT = 
120
DEFAULT_STOP_TIMEOUT = 
300

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Utils::SwitchUser

#ct_attach, #ct_syscmd

Methods included from Assets::Definition

#define_assets

Methods included from Manipulable

#acquire_manipulation_lock, #init_manipulable, #is_being_manipulated?, #manipulate, #manipulated_by, #release_manipulation_lock

Methods included from Lockable

#exclusively, included, #inclusively, #init_lock, #lock, #unlock

Constructor Details

#initialize(pool, id, user = nil, group = nil, dataset = nil, opts = {}) ⇒ Container

Returns a new instance of Container.

Parameters:

  • pool (Pool)
  • id (String)
  • user (User, nil) (defaults to: nil)
  • group (Group, nil) (defaults to: nil)
  • dataset (String, nil) (defaults to: nil)
  • opts (Hash) (defaults to: {}) —

    options

Options Hash (opts):

  • load (Boolean) —

    load config

  • load_from (String) —

    load from this string instead of config file

  • staged (Boolean) —

    create a staged container

  • devices (Boolean) —

    determines whether devices are initialized

  • dataset_cache (OsCtl::Lib::Zfs::DatasetCache) 


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# File 'lib/osctld/container.rb', line 42

def initialize(pool, id, user = nil, group = nil, dataset = nil, opts = {})
  init_lock
  init_manipulable

  opts[:load] = true unless opts.has_key?(:load)

  if (user.nil? || group.nil?) && !opts[:load]
    raise ArgumentError, 'either set load: true or provide user and group'
  end

  @pool = pool
  @id = id
  @user = user
  @group = group
  @dataset = dataset
  @state = opts[:staged] ? :staged : :unknown
  @ephemeral = false
  @netifs = NetInterface::Manager.new(self)
  @cgparams = nil
  @devices = nil
  @prlimits = nil
  @mounts = nil
  @hostname = nil
  @dns_resolvers = nil
  @nesting = false
  @cpu_package = 'auto'
  @seccomp_profile = nil
  @apparmor = AppArmor.new(self)
  @lxcfs = user && group ? Container::Lxcfs.new : nil
  @lxc_config = Container::LxcConfig.new(self)
  @init_cmd = nil
  @raw_configs = Container::RawConfigs.new
  @attrs = Attributes.new
  @run_conf = nil
  @hints = Container::Hints.new(self)

  if opts[:load]
    load_opts = {
      init_devices: !opts.has_key?(:devices) || opts[:devices],
      dataset_cache: opts[:dataset_cache],
    }

    if opts[:load_from]
      load_config_string(opts[:load_from], **load_opts)
    else
      load_config_file(config_path, **load_opts)
    end
  end
end

Instance Attribute Details

#apparmor ⇒ Object

Returns the value of attribute apparmor



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# File 'lib/osctld/container.rb', line 23

def apparmor
  @apparmor
end

#arch ⇒ Object

Returns the value of attribute arch



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# File 'lib/osctld/container.rb', line 23

def arch
  @arch
end

#attrs ⇒ Object

Returns the value of attribute attrs



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# File 'lib/osctld/container.rb', line 23

def attrs
  @attrs
end

#autostart ⇒ Object

Returns the value of attribute autostart



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# File 'lib/osctld/container.rb', line 23

def autostart
  @autostart
end

#cgparams ⇒ Object

Returns the value of attribute cgparams



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# File 'lib/osctld/container.rb', line 23

def cgparams
  @cgparams
end

#cpu_package ⇒ Object

Returns the value of attribute cpu_package



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# File 'lib/osctld/container.rb', line 23

def cpu_package
  @cpu_package
end

#dataset ⇒ Object

Returns the value of attribute dataset



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# File 'lib/osctld/container.rb', line 23

def dataset
  @dataset
end

#devices ⇒ Object

Returns the value of attribute devices



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# File 'lib/osctld/container.rb', line 23

def devices
  @devices
end

#distribution ⇒ Object

Returns the value of attribute distribution



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# File 'lib/osctld/container.rb', line 23

def distribution
  @distribution
end

#dns_resolvers ⇒ Object

Returns the value of attribute dns_resolvers



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# File 'lib/osctld/container.rb', line 23

def dns_resolvers
  @dns_resolvers
end

#ephemeral ⇒ Object Also known as: ephemeral?

Returns the value of attribute ephemeral



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# File 'lib/osctld/container.rb', line 23

def ephemeral
  @ephemeral
end

#group ⇒ Object

Returns the value of attribute group



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# File 'lib/osctld/container.rb', line 23

def group
  @group
end

#hints ⇒ Object (readonly)

Returns the value of attribute hints



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# File 'lib/osctld/container.rb', line 23

def hints
  @hints
end

#hostname ⇒ Object

Returns the value of attribute hostname



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# File 'lib/osctld/container.rb', line 23

def hostname
  @hostname
end

#id ⇒ Object

Returns the value of attribute id



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# File 'lib/osctld/container.rb', line 23

def id
  @id
end

#init_cmd ⇒ Object

Returns the value of attribute init_cmd



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# File 'lib/osctld/container.rb', line 23

def init_cmd
  @init_cmd
end

#lxc_config ⇒ Object

Returns the value of attribute lxc_config



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# File 'lib/osctld/container.rb', line 23

def lxc_config
  @lxc_config
end

#lxcfs ⇒ Object (readonly)

Returns the value of attribute lxcfs



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# File 'lib/osctld/container.rb', line 23

def lxcfs
  @lxcfs
end

#mounted ⇒ Object (protected)

Returns the value of attribute mounted



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# File 'lib/osctld/container.rb', line 830

def mounted
  @mounted
end

#mounts ⇒ Object

Returns the value of attribute mounts



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# File 'lib/osctld/container.rb', line 23

def mounts
  @mounts
end

#nesting ⇒ Object

Returns the value of attribute nesting



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# File 'lib/osctld/container.rb', line 23

def nesting
  @nesting
end

#netifs ⇒ Object

Returns the value of attribute netifs



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# File 'lib/osctld/container.rb', line 23

def netifs
  @netifs
end

#pool ⇒ Object

Returns the value of attribute pool



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# File 'lib/osctld/container.rb', line 23

def pool
  @pool
end

#prlimits ⇒ Object

Returns the value of attribute prlimits



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# File 'lib/osctld/container.rb', line 23

def prlimits
  @prlimits
end

#raw_configs ⇒ Object (readonly)

Returns the value of attribute raw_configs



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# File 'lib/osctld/container.rb', line 23

def raw_configs
  @raw_configs
end

#run_conf ⇒ Object (readonly)

Returns the value of attribute run_conf



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# File 'lib/osctld/container.rb', line 23

def run_conf
  @run_conf
end

#seccomp_profile ⇒ Object

Returns the value of attribute seccomp_profile



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# File 'lib/osctld/container.rb', line 23

def seccomp_profile
  @seccomp_profile
end

#send_log ⇒ Object

Returns the value of attribute send_log



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# File 'lib/osctld/container.rb', line 23

def send_log
  @send_log
end

#start_menu ⇒ Object

Returns the value of attribute start_menu



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# File 'lib/osctld/container.rb', line 23

def start_menu
  @start_menu
end

#state ⇒ Object

Returns the value of attribute state



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# File 'lib/osctld/container.rb', line 23

def state
  @state
end

#user ⇒ Object

Returns the value of attribute user



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# File 'lib/osctld/container.rb', line 23

def user
  @user
end

#version ⇒ Object

Returns the value of attribute version



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# File 'lib/osctld/container.rb', line 23

def version
  @version
end

Class Method Details

.default_dataset(pool, id, dataset_cache: nil) ⇒ Object 



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# File 'lib/osctld/container.rb', line 18

def self.default_dataset(pool, id, dataset_cache: nil)
  name = File.join(pool.ct_ds, id)
  OsCtl::Lib::Zfs::Dataset.new(name, base: name, cache: dataset_cache)
end

Instance Method Details

#abs_apply_cgroup_path(subsystem) ⇒ Object 



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# File 'lib/osctld/container.rb', line 456

def abs_apply_cgroup_path(subsystem)
  CGroup.abs_cgroup_path(subsystem, base_cgroup_path)
end

#abs_cgroup_path(subsystem) ⇒ Object 



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# File 'lib/osctld/container.rb', line 452

def abs_cgroup_path(subsystem)
  CGroup.abs_cgroup_path(subsystem, cgroup_path)
end

#assets ⇒ Object 



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# File 'lib/osctld/container.rb', line 114

def assets
  define_assets do |add|
    # Datasets
    add.dataset(
      dataset.to_s,
      desc: "Container's rootfs dataset",
      uidmap: uid_map.map(&:to_a),
      gidmap: gid_map.map(&:to_a),
      user: root_host_uid,
      group: root_host_gid,
      mode: 0770,
      validate_if: mounted?,
    )

    # Directories and files
    add.directory(
      rootfs,
      desc: "Container's rootfs",
      user: root_host_uid,
      group: root_host_gid,
      mode_bit_and: 0111, # has all executable bits set
      validate_if: mounted?,
    )

    add.directory(
      user_hook_script_dir,
      desc: 'User supplied script hooks',
      user: 0,
      group: 0,
      mode: 0700
    )
    add.directory(
      lxc_dir,
      desc: 'LXC configuration',
      user: 0,
      group: user.ugid,
      mode: 0750
    )

    lxc_config.assets(add)

    add.file(
      File.join(lxc_dir, '.bashrc'),
      desc: 'Shell configuration file for osctl ct su',
      user: 0,
      group: 0,
      mode: 0644
    )

    add.file(
      config_path,
      desc: 'Container config for osctld',
      user: 0,
      group: 0,
      mode: 0400
    )
    add.file(
      log_path,
      desc: 'LXC log file',
      user: 0,
      group: user.ugid,
      mode: 0660
    )

    run_conf.assets(add) if run_conf

    devices.assets(add)
  end
end

#base_cgroup_path ⇒ Object 



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# File 'lib/osctld/container.rb', line 436

def base_cgroup_path
  inclusively { File.join(group.full_cgroup_path(user), "ct.#{id}") }
end

#can_dist_configure_network? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/osctld/container.rb', line 371

def can_dist_configure_network?
  inclusively do
    next false if netifs.detect { |netif| !netif.can_run_distconfig? }
    true
  end
end

#can_start? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/osctld/container.rb', line 342

def can_start?
  inclusively { state != :staged && state != :error && pool.active? }
end

#cgroup_path ⇒ Object 



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# File 'lib/osctld/container.rb', line 440

def cgroup_path
  File.join(base_cgroup_path, 'user-owned')
end

#chgrp(grp, missing_devices: nil) ⇒ Object 



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# File 'lib/osctld/container.rb', line 276

def chgrp(grp, missing_devices: nil)
  self.group = grp

  case missing_devices
  when 'provide'
    devices.ensure_all
    devices.init

  when 'remove'
    devices.remove_missing
    devices.init

  when 'check'
    devices.check_all_available!(group: grp)

  else
    fail "unsupported action for missing devices: '#{missing_devices}'"
  end

  save_config
  lxc_config.configure
  configure_bashrc
end

#chown(user) ⇒ Object 



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# File 'lib/osctld/container.rb', line 269

def chown(user)
  self.user = user
  save_config
  lxc_config.configure
  configure_bashrc
end

#clear_start_menu ⇒ Object 



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# File 'lib/osctld/container.rb', line 612

def clear_start_menu
  menu = start_menu
  menu.unlink if menu
end

#clone_from(ct, id, opts = {}) ⇒ Object (protected)

Change the container so that it becomes a clone of `ct` with a different id

Parameters:

  • ct (Container) —

    the source container

  • id (String) —

    new container id

  • opts (Hash) (defaults to: {}) —

    options

Options Hash (opts):

  • :pool (Pool) —

    target pool, optional

  • :user (User) —

    target user, optional

  • :group (Group) —

    target group, optional

  • :dataset (String) —

    target dataset, optional

  • :network_interfaces (Boolean) 


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# File 'lib/osctld/container.rb', line 938

def clone_from(ct, id, opts = {})
  init_lock
  init_manipulable

  @id = id
  @pool = opts[:pool] if opts[:pool]
  @user = opts[:user] if opts[:user]
  @group = opts[:group] if opts[:group]
  @state = :staged
  @send_log = nil

  if opts[:dataset]
    @dataset = OsCtl::Lib::Zfs::Dataset.new(
      opts[:dataset],
      base: opts[:dataset],
    )
  else
    @dataset = Container.default_dataset(@pool, @id)
  end

  @apparmor = @apparmor.dup(self)
  @autostart = @autostart && @autostart.dup(self)
  @cgparams = cgparams.dup(self)
  @prlimits = prlimits.dup(self)
  @mounts = mounts.dup(self)
  @start_menu = @start_menu && @start_menu.dup(self)
  @lxcfs = lxcfs.dup
  @lxc_config = lxc_config.dup(self)
  @raw_configs = raw_configs.dup
  @attrs = attrs.dup
  @run_conf = nil
  @next_run_conf = nil
  @past_run_conf = nil

  @devices = devices.dup(self)
  devices.init

  if opts[:network_interfaces]
    @netifs = netifs.dup(self)
    netifs.each(&:setup)
  else
    @netifs = NetInterface::Manager.new(self)
  end

  @hints = hints.dup(self)
end

#close_send_log(save: true) ⇒ Object 



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# File 'lib/osctld/container.rb', line 661

def close_send_log(save: true)
  exclusively do
    self.send_log.close
    self.send_log = nil
    save_config if save
  end
end

#config_path ⇒ Object 



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# File 'lib/osctld/container.rb', line 399

def config_path
  inclusively { File.join(pool.conf_path, 'ct', "#{id}.yml") }
end

#configure(distribution, version, arch) ⇒ Object 



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# File 'lib/osctld/container.rb', line 96

def configure(distribution, version, arch)
  exclusively do
    @distribution = distribution
    @version = version
    @arch = arch
    @netifs = NetInterface::Manager.new(self)
    @nesting = false
    @seccomp_profile = default_seccomp_profile
    @cgparams = CGroup::ContainerParams.new(self)
    @devices = Devices::Manager.new_for(self)
    @prlimits = PrLimits::Manager.default(self)
    @mounts = Mount::Manager.new(self)
    @run_conf ||= new_run_conf
    devices.init
    save_config
  end
end

#configure_bashrc ⇒ Object 



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# File 'lib/osctld/container.rb', line 640

def configure_bashrc
  ErbTemplate.render_to('ct/bashrc', {
    ct: self,
    override: %w(
      attach cgroup console device execute freeze info ls monitor stop top
      unfreeze wait
    ),
    disable: %w(
      autostart checkpoint clone copy create destroy snapshot
      start-ephemeral unshare
    ),
  }, File.join(lxc_dir, '.bashrc'))
end

#current_state ⇒ Symbol

Fetch current container state by forking into it

Returns:

  • (Symbol) 


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# File 'lib/osctld/container.rb', line 320

def current_state
  begin
    self.state = ContainerControl::Commands::State.run!(self).state
  rescue ContainerControl::Error
    self.state = :error
  end
end

#datasets ⇒ Array<OsCtl::Lib::Zfs::Dataset>

Return a list of all container datasets

Returns:

  • (Array<OsCtl::Lib::Zfs::Dataset>) 


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# File 'lib/osctld/container.rb', line 425

def datasets
  ds = inclusively { dataset }
  [ds] + ds.descendants
end

#default_init_cmd ⇒ Object (protected) 



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# File 'lib/osctld/container.rb', line 989

def default_init_cmd
  ['/sbin/init']
end

#default_seccomp_profile ⇒ Object (protected) 



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# File 'lib/osctld/container.rb', line 985

def default_seccomp_profile
  '/etc/lxc/config/common.seccomp'
end

#dir ⇒ Object 



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# File 'lib/osctld/container.rb', line 378

def dir
  dataset.mountpoint
end

#dump_config ⇒ Object

Dump to config



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# File 'lib/osctld/container.rb', line 729

def dump_config
  inclusively do
    data = {
      'user' => user.name,
      'group' => group.name,
      'dataset' => dataset.name,
      'distribution' => distribution,
      'version' => version,
      'arch' => arch,
      'net_interfaces' => netifs.dump,
      'cgparams' => cgparams.dump,
      'devices' => devices.dump,
      'prlimits' => prlimits.dump,
      'mounts' => mounts.dump,
      'autostart' => autostart && autostart.dump,
      'ephemeral' => ephemeral,
      'hostname' => hostname && hostname.to_s,
      'dns_resolvers' => dns_resolvers,
      'nesting' => nesting,
      'seccomp_profile' => seccomp_profile == default_seccomp_profile \
                           ? nil : seccomp_profile,
      'cpu_package' => cpu_package,
      'init_cmd' => init_cmd,
      'start_menu' => start_menu && start_menu.dump,
      'lxcfs' => lxcfs.dump,
      'raw' => raw_configs.dump,
      'attrs' => attrs.dump,
      'hints' => hints.dump,
    }

    data['state'] = 'staged' if state == :staged
    data['send_log'] = send_log.dump if send_log

    data
  end
end

#dup(id, opts = {}) ⇒ Object

Duplicate the container with a different ID

The returned container has `state` set to `:staged` and its assets will not exist, so the caller has to build the container and call `ct.state = :complete` for the container to become usable.

Parameters:

  • id (String) —

    new container id

  • opts (Hash) (defaults to: {}) —

    options

Options Hash (opts):

  • :pool (Pool) —

    target pool, optional

  • :user (User) —

    target user, optional

  • :group (Group) —

    target group, optional

  • :dataset (String) —

    target dataset, optional



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# File 'lib/osctld/container.rb', line 196

def dup(id, opts = {})
  ct = clone
  ct.send(:clone_from, self, id, opts)
  ct
end

#each_dataset {|ds| ... } ⇒ Object

Iterate over all container datasets

Yield Parameters:

  • ds (OsCtl::Lib::Zfs::Dataset) 


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# File 'lib/osctld/container.rb', line 432

def each_dataset(&block)
  datasets.each(&block)
end

#ensure_run_conf ⇒ Container::RunConfiguration

Call #init_run_conf unless #run_conf is already set

Returns:



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# File 'lib/osctld/container.rb', line 242

def ensure_run_conf
  exclusively do
    init_run_conf if @run_conf.nil?
    run_conf
  end
end

#entry_cgroup_path ⇒ Object 



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# File 'lib/osctld/container.rb', line 448

def entry_cgroup_path
  File.join(cgroup_path, "lxc.monitor.#{id}")
end

#export ⇒ Object

Export to clients



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# File 'lib/osctld/container.rb', line 677

def export
  inclusively do
    if run_conf && run_conf.lxcfs_worker
      lxcfs_worker = run_conf.lxcfs_worker
    end

    {
      pool: pool.name,
      id: id,
      user: user.name,
      group: group.name,
      uid_map: user.uid_map.map(&:to_h),
      gid_map: user.gid_map.map(&:to_h),
      dataset: dataset.name,
      rootfs: rootfs,
      boot_dataset: run_conf ? run_conf.dataset.name : dataset.name,
      boot_rootfs: run_conf ? run_conf.rootfs : rootfs,
      lxc_path: lxc_home,
      lxc_dir: lxc_dir,
      group_path: cgroup_path,
      distribution: run_conf ? run_conf.distribution : distribution,
      version: run_conf ? run_conf.version : version,
      state: state,
      init_pid: init_pid,
      autostart: autostart ? true : false,
      autostart_priority: autostart && autostart.priority,
      autostart_delay: autostart && autostart.delay,
      ephemeral: ephemeral,
      hostname: hostname,
      dns_resolvers: dns_resolvers,
      nesting: nesting,
      seccomp_profile: seccomp_profile,
      init_cmd: format_user_init_cmd,
      cpu_package_inuse: run_conf ? run_conf.cpu_package : nil,
      cpu_package_set: cpu_package,
      cpu_limit: find_cpu_limit(parents: false),
      memory_limit: find_memory_limit(parents: false),
      swap_limit: find_swap_limit(parents: false),
      start_menu: start_menu ? true : false,
      start_menu_timeout: start_menu && start_menu.timeout,
      lxcfs_enable: lxcfs.enable,
      lxcfs_worker: lxcfs_worker && lxcfs_worker.name,
      lxcfs_mountpoint: lxcfs_worker && lxcfs_worker.mountpoint,
      lxcfs_loadavg: lxcfs.loadavg,
      lxcfs_cfs: lxcfs.cfs,
      raw_lxc: raw_configs.lxc,
      log_file: log_path,
    }.merge!(attrs.export)
  end
end

#find_cpu_limit(parents: true) ⇒ Integer?

Returns CPU limit in percent (100 % for one CPU).

Returns:

  • (Integer, nil) —

    CPU limit in percent (100 % for one CPU)



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# File 'lib/osctld/container.rb', line 487

def find_cpu_limit(parents: true)
  limit = cgparams.find_cpu_limit

  if limit
    return limit
  elsif !parents
    return
  end

  group.find_cpu_limit(parents: parents)
end

#find_memory_limit(parents: true) ⇒ Integer?

Returns memory limit in bytes.

Returns:

  • (Integer, nil) —

    memory limit in bytes



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# File 'lib/osctld/container.rb', line 461

def find_memory_limit(parents: true)
  limit = cgparams.find_memory_limit

  if limit
    return limit
  elsif !parents
    return
  end

  group.find_memory_limit(parents: parents)
end

#find_swap_limit(parents: true) ⇒ Integer?

Returns swap limit in bytes.

Returns:

  • (Integer, nil) —

    swap limit in bytes



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# File 'lib/osctld/container.rb', line 474

def find_swap_limit(parents: true)
  limit = cgparams.find_swap_limit

  if limit
    return limit
  elsif !parents
    return
  end

  group.find_swap_limit(parents: parents)
end

#forget_past_run_conf ⇒ Object 



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# File 'lib/osctld/container.rb', line 217

def forget_past_run_conf
  exclusively { @past_run_conf = nil }
end

#format_exec_init_cmd ⇒ Object 



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# File 'lib/osctld/container.rb', line 801

def format_exec_init_cmd
  cmd = (init_cmd || default_init_cmd)
  menu = start_menu

  if menu
    menu.init_cmd(cmd)
  else
    cmd
  end.join(' ')
end

#format_user_init_cmd ⇒ Object 



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# File 'lib/osctld/container.rb', line 797

def format_user_init_cmd
  (init_cmd || default_init_cmd).join(' ')
end

#fresh_state ⇒ Symbol

Fetch current state if the state is not known, otherwise return the known state

Returns:

  • (Symbol) 


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# File 'lib/osctld/container.rb', line 330

def fresh_state
  if state == :unknown
    current_state
  else
    state
  end
end

#get_past_run_conf ⇒ Container::RunConfiguration?

Returns:



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# File 'lib/osctld/container.rb', line 213

def get_past_run_conf
  inclusively { @past_run_conf }
end

#get_run_conf ⇒ Container::RunConfiguration

Returns:



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# File 'lib/osctld/container.rb', line 208

def get_run_conf
  run_conf || new_run_conf
end

#gid_map ⇒ Object 



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# File 'lib/osctld/container.rb', line 411

def gid_map
  user.gid_map
end

#ident ⇒ Object 



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# File 'lib/osctld/container.rb', line 92

def ident
  inclusively { "#{pool.name}:#{id}" }
end

#init_pid ⇒ Object 



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# File 'lib/osctld/container.rb', line 346

def init_pid
  inclusively do
    @run_conf ? run_conf.init_pid : nil
  end
end

#init_run_conf ⇒ Object

This must be called on container start



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# File 'lib/osctld/container.rb', line 227

def init_run_conf
  exclusively do
    if @next_run_conf
      @run_conf = @next_run_conf
      @next_run_conf = nil
    else
      @run_conf = new_run_conf
    end

    @run_conf.save
  end
end

#load_config_file(path = nil, **opts) ⇒ Object (protected) 



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# File 'lib/osctld/container.rb', line 832

def load_config_file(path = nil, **opts)
  cfg = parse_yaml do
    OsCtl::Lib::ConfigFile.load_yaml_file(path || config_path)
  end

  load_config_hash(cfg, **opts)
end

#load_config_hash(cfg, init_devices: true, dataset_cache: nil) ⇒ Object (protected) 



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# File 'lib/osctld/container.rb', line 853

def load_config_hash(cfg, init_devices: true, dataset_cache: nil)
  cfg = Container::Adaptor.adapt(self, cfg)

  exclusively do
    @state = cfg['state'].to_sym if cfg['state']
    @user ||= DB::Users.find(cfg['user'], pool) || (raise ConfigError.new(
      "container #{id}: user '#{cfg['user']}' not found"
    ))
    @group ||= DB::Groups.find(cfg['group'], pool) || (raise ConfigError.new(
      "container #{id}: group '#{cfg['group']}' not found"
    ))

    unless @dataset
      if cfg['dataset']
        @dataset = OsCtl::Lib::Zfs::Dataset.new(
          cfg['dataset'],
          base: cfg['dataset'],
          cache: dataset_cache,
        )
      else
        @dataset = Container.default_dataset(
          pool,
          id,
          dataset_cache: dataset_cache,
        )
      end
    end

    @distribution = cfg['distribution']
    @version = cfg['version']
    @arch = cfg['arch']
    @autostart = cfg['autostart'] && AutoStart::Config.load(self, cfg['autostart'])
    @ephemeral = cfg['ephemeral']
    @hostname = cfg['hostname'] && OsCtl::Lib::Hostname.new(cfg['hostname'])
    @dns_resolvers = cfg['dns_resolvers']
    @nesting = cfg['nesting'] || false
    @cpu_package = cfg.fetch('cpu_package', 'auto')
    @seccomp_profile = cfg['seccomp_profile'] || default_seccomp_profile
    @init_cmd = cfg['init_cmd']

    @start_menu =
      if !cfg.has_key?('start_menu') || cfg['start_menu']
        Container::StartMenu.load(self, cfg['start_menu'] || {})
      else
        nil
      end

    @lxcfs = Container::Lxcfs.load(cfg['lxcfs'] || {})

    @run_conf = Container::RunConfiguration.load(self)

    if cfg['send_log']
      @send_log = SendReceive::Log.load(cfg['send_log'])
      SendReceive::Tokens.register(@send_log.token)
    end

    @cgparams = CGroup::ContainerParams.load(self, cfg['cgparams'])
    @prlimits = PrLimits::Manager.load(self, cfg['prlimits'] || {})
    @raw_configs = Container::RawConfigs.new(cfg['raw'] || {})
    @attrs = Attributes.load(cfg['attrs'] || {})

    # It's necessary to load devices _before_ netifs. The device manager needs
    # to create cgroups first, in order for echo a > devices.deny to work.
    # If the container has a veth interface, the setup code switches to the
    # container's user, which creates cgroups in all subsystems. Devices then
    # can't be initialized properly.
    @devices = Devices::Manager.load(self, cfg['devices'] || [])
    @devices.init if init_devices

    @netifs = NetInterface::Manager.load(self, cfg['net_interfaces'] || [])
    @mounts = Mount::Manager.load(self, cfg['mounts'] || [])

    @hints = Container::Hints.load(self, cfg['hints'] || {})
  end
end

#load_config_string(str, **opts) ⇒ Object (protected) 



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# File 'lib/osctld/container.rb', line 840

def load_config_string(str, **opts)
  cfg = parse_yaml { OsCtl::Lib::ConfigFile.load_yaml(str) }
  load_config_hash(cfg, **opts)
end

#log_path ⇒ Object 



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# File 'lib/osctld/container.rb', line 812

def log_path
  inclusively { File.join(pool.log_path, 'ct', "#{id}.log") }
end

#log_type ⇒ Object 



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# File 'lib/osctld/container.rb', line 816

def log_type
  inclusively { "ct=#{pool.name}:#{id}" }
end

#lxc_dir(user: nil, group: nil) ⇒ Object 



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# File 'lib/osctld/container.rb', line 386

def lxc_dir(user: nil, group: nil)
  inclusively { File.join(lxc_home(user: user, group: group), id) }
end

#lxc_home(user: nil, group: nil) ⇒ Object 



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# File 'lib/osctld/container.rb', line 382

def lxc_home(user: nil, group: nil)
  inclusively { (group || self.group).userdir(user || self.user) }
end

#manipulation_resource ⇒ Object 



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# File 'lib/osctld/container.rb', line 820

def manipulation_resource
  ['container', ident]
end

#mount(force: false) ⇒ Object

Mount the container's dataset

Parameters:

  • force (Boolean) (defaults to: false) —

    ensure the datasets are mounted even if osctld already mounted them



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# File 'lib/osctld/container.rb', line 252

def mount(force: false)
  return if !force && mounted
  dataset.mount(recursive: true)
  self.mounted = true
end

#mounted?(force: false) ⇒ Boolean

Check if the container's dataset is mounted

Parameters:

  • force (Boolean) (defaults to: false) —

    check if the dataset is mounted even if osctld already mounted it

Returns:

  • (Boolean) 


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# File 'lib/osctld/container.rb', line 261

def mounted?(force: false)
  if force || mounted.nil?
    self.mounted = dataset.mounted?(recursive: true)
  else
    mounted
  end
end

#new_run_conf ⇒ Container::RunConfiguration

Returns:



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# File 'lib/osctld/container.rb', line 203

def new_run_conf
  Container::RunConfiguration.new(self, load_conf: false)
end

#open_send_log(role, token, opts = {}) ⇒ Object 



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# File 'lib/osctld/container.rb', line 654

def open_send_log(role, token, opts = {})
  exclusively do
    self.send_log = SendReceive::Log.new(role: role, token: token, opts: opts)
    save_config
  end
end

#parse_yaml ⇒ Object (protected) 



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# File 'lib/osctld/container.rb', line 845

def parse_yaml
  begin
    yield
  rescue Psych::Exception => e
    raise ConfigError.new("Unable to load config of container #{id}", e)
  end
end

#patch_config(new_config) ⇒ Object

Update keys/values from `new_config` in the container's config

Parameters:

  • new_config (Hash) 


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# File 'lib/osctld/container.rb', line 788

def patch_config(new_config)
  exclusively do
    tmp = dump_config
    tmp.update(new_config)
    load_config_hash(tmp)
    save_config
  end
end

#read_hostname ⇒ String?

Read hostname from a running container

Returns:

  • (String, nil) 


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# File 'lib/osctld/container.rb', line 619

def read_hostname
  return nil unless running?

  begin
    return ContainerControl::Commands::GetHostname.run!(self)
  rescue ContainerControl::Error => e
    log(:warn, "Unable to read container hostname: #{e.message}")
    return nil
  end
end

#reconfigure ⇒ Object

Regenerate LXC config



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# File 'lib/osctld/container.rb', line 636

def reconfigure
  lxc_config.configure
end

#reload_config ⇒ Object 



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# File 'lib/osctld/container.rb', line 776

def reload_config
  load_config_file
end

#replace_config(config) ⇒ Object

Parameters:

  • config (String) 


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# File 'lib/osctld/container.rb', line 781

def replace_config(config)
  load_config_string(config)
  save_config
end

#root_host_gid ⇒ Object 



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# File 'lib/osctld/container.rb', line 419

def root_host_gid
  user.gid_map.ns_to_host(0)
end

#root_host_uid ⇒ Object 



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# File 'lib/osctld/container.rb', line 415

def root_host_uid
  user.uid_map.ns_to_host(0)
end

#rootfs ⇒ Object 



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# File 'lib/osctld/container.rb', line 390

def rootfs
  File.join(dir, 'private')

rescue SystemCommandFailed
  # Dataset for staged containers does not have to exist yet, relevant
  # primarily for ct show/list
  nil
end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/osctld/container.rb', line 338

def running?
  state == :running
end

#save_config ⇒ Object 



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# File 'lib/osctld/container.rb', line 766

def save_config
  data = dump_config

  File.open(config_path, 'w', 0400) do |f|
    f.write(OsCtl::Lib::ConfigFile.dump_yaml(data))
  end

  File.chown(0, 0, config_path)
end

#set(opts) ⇒ Object 



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# File 'lib/osctld/container.rb', line 499

def set(opts)
  opts.each do |k, v|
    case k
    when :autostart
      self.autostart = AutoStart::Config.new(self, v[:priority], v[:delay])

    when :ephemeral
      self.ephemeral = true

    when :hostname
      original = nil

      exclusively do
        original = @hostname
        @hostname = OsCtl::Lib::Hostname.new(v)
      end

      DistConfig.run(get_run_conf, :set_hostname, original: original)

    when :dns_resolvers
      self.dns_resolvers = v
      DistConfig.run(get_run_conf, :dns_resolvers)

    when :nesting
      self.nesting = true

    when :distribution
      exclusively do
        @distribution = v[:name]
        @version = v[:version]
        @arch = v[:arch] if v[:arch]
      end

    when :cpu_package
      self.cpu_package = v

    when :seccomp_profile
      self.seccomp_profile = v

    when :init_cmd
      self.init_cmd = v

    when :start_menu
      self.start_menu = Container::StartMenu.new(self, v[:timeout])

    when :lxcfs
      self.lxcfs.configure(loadavg: v[:loadavg], cfs: v[:cfs])

    when :raw_lxc
      self.raw_configs.lxc = v

    when :attrs
      attrs.update(v)
    end
  end

  save_config
  lxc_config.configure_base
end

#set_next_run_conf(next_run_conf) ⇒ Object

Parameters:



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# File 'lib/osctld/container.rb', line 222

def set_next_run_conf(next_run_conf)
  exclusively { @next_run_conf = next_run_conf }
end

#setup_start_menu ⇒ Object 



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# File 'lib/osctld/container.rb', line 607

def setup_start_menu
  menu = start_menu
  menu.deploy if menu
end

#starting ⇒ Object 



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# File 'lib/osctld/container.rb', line 352

def starting
  exclusively do
    # Normally {#init_run_conf} is called from {Commands::Container::Start},
    # but in case the lxc-start was invoked manually outside of osctld,
    # initiate the run conf if needed.
    ensure_run_conf
  end
end

#stopped ⇒ Object 



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# File 'lib/osctld/container.rb', line 361

def stopped
  exclusively do
    if run_conf
      run_conf.destroy
      @past_run_conf = @run_conf
      @run_conf = nil
    end
  end
end

#uid_map ⇒ Object 



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# File 'lib/osctld/container.rb', line 407

def uid_map
  user.uid_map
end

#unregister ⇒ Object

Unregister the container from internal uses in osctld, e.g. on pool export



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# File 'lib/osctld/container.rb', line 670

def unregister
  exclusively do
    SendReceive::Tokens.free(send_log.token) if send_log
  end
end

#unset(opts) ⇒ Object 



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# File 'lib/osctld/container.rb', line 559

def unset(opts)
  opts.each do |k, v|
    case k
    when :autostart
      self.autostart = false
      pool.autostart_plan.stop_ct(self)

    when :ephemeral
      self.ephemeral = false

    when :hostname
      self.hostname = nil
      DistConfig.run(get_run_conf, :unset_etc_hosts)

    when :dns_resolvers
      self.dns_resolvers = nil

    when :nesting
      self.nesting = false

    when :cpu_package
      self.cpu_package = 'auto'

    when :seccomp_profile
      self.seccomp_profile = default_seccomp_profile

    when :init_cmd
      self.init_cmd = nil

    when :start_menu
      clear_start_menu
      self.start_menu = nil

    when :lxcfs
      self.lxcfs.disable

    when :raw_lxc
      self.raw_configs.lxc = nil

    when :attrs
      v.each { |attr| attrs.unset(attr) }
    end
  end

  save_config
  lxc_config.configure_base
end

#update_hints ⇒ Object 



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# File 'lib/osctld/container.rb', line 630

def update_hints
  hints.
  save_config
end

#user_hook_script_dir ⇒ Object 



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# File 'lib/osctld/container.rb', line 403

def user_hook_script_dir
  inclusively { File.join(pool.root_user_hook_script_dir, 'ct', id) }
end

#wrapper_cgroup_path ⇒ Object 



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# File 'lib/osctld/container.rb', line 444

def wrapper_cgroup_path
  File.join(base_cgroup_path, 'wrapper')
end