Class: OsCtld::Group
Instance Attribute Summary collapse
Instance Method Summary
collapse
#define_assets
#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, name, load: true, config: nil, devices: true, root: false) ⇒ Group
Returns a new instance of Group.
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# File 'lib/osctld/group.rb', line 13
def initialize(pool, name, load: true, config: nil, devices: true, root: false)
init_lock
init_manipulable
@pool = pool
@name = name
@root = root
@cgparams = nil
@devices = nil
@attrs = Attributes.new
load_config(config) if load
devices.init if load && devices
end
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Instance Attribute Details
#attrs ⇒ Object
Returns the value of attribute attrs.
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# File 'lib/osctld/group.rb', line 11
def attrs
@attrs
end
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#cgparams ⇒ Object
Returns the value of attribute cgparams.
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# File 'lib/osctld/group.rb', line 11
def cgparams
@cgparams
end
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#devices ⇒ Object
Returns the value of attribute devices.
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# File 'lib/osctld/group.rb', line 11
def devices
@devices
end
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#name ⇒ Object
Returns the value of attribute name.
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# File 'lib/osctld/group.rb', line 11
def name
@name
end
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#pool ⇒ Object
Returns the value of attribute pool.
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# File 'lib/osctld/group.rb', line 11
def pool
@pool
end
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Instance Method Details
#abs_cgroup_path(subsystem) ⇒ Object
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# File 'lib/osctld/group.rb', line 124
def abs_cgroup_path(subsystem)
File.join(CGroup::FS, CGroup.real_subsystem(subsystem), cgroup_path)
end
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#abs_full_cgroup_path(subsystem, user) ⇒ Object
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# File 'lib/osctld/group.rb', line 128
def abs_full_cgroup_path(subsystem, user)
File.join(
CGroup::FS,
CGroup.real_subsystem(subsystem),
full_cgroup_path(user)
)
end
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#any_container_running? ⇒ Boolean
Return `true` if any container from this or any descendant group is running.
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# File 'lib/osctld/group.rb', line 236
def any_container_running?
groups = [self] + descendants
DB::Containers.get.each do |ct|
return true if ct.pool == pool && groups.include?(self) && ct.running?
end
false
end
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#assets ⇒ Object
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# File 'lib/osctld/group.rb', line 46
def assets
define_assets do |add|
add.file(
config_path,
desc: "osctld's group config",
user: 0,
group: 0,
mode: 0400
)
users.each do |u|
add.directory(
userdir(u),
desc: "LXC path for #{u.name}:#{name}",
user: 0,
group: u.ugid,
mode: 0751
)
end
end
end
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#cgroup_path ⇒ Object
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# File 'lib/osctld/group.rb', line 108
def cgroup_path
if root?
path
else
File.join(
DB::Groups.root(pool).path,
*name.split('/').drop(1).map { |v| "group.#{v}" }
)
end
end
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#children ⇒ Array<Group>
Return all groups that are direct descendants
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# File 'lib/osctld/group.rb', line 184
def children
DB::Groups.get.select do |grp|
next if grp.pool != pool || grp.name == name
if root?
s = '/'
else
s = "#{name}/"
end
grp.name.start_with?(s) && grp.name[s.size..-1].index('/').nil?
end.sort! { |a, b| a.name <=> b.name }
end
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#config_dir ⇒ Object
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# File 'lib/osctld/group.rb', line 100
def config_dir
File.join(pool.conf_path, 'group', id)
end
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#config_path ⇒ Object
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# File 'lib/osctld/group.rb', line 104
def config_path
File.join(pool.conf_path, 'group', id, 'config.yml')
end
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# File 'lib/osctld/group.rb', line 38
def configure(path: nil, devices: true)
@path = path if root?
@cgparams = CGroup::Params.new(self)
@devices = Devices::GroupManager.new(self)
@devices.init if devices
save_config
end
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#containers ⇒ Object
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# File 'lib/osctld/group.rb', line 223
def containers
ret = []
DB::Containers.get.each do |ct|
next if ct.pool != pool || ct.group != self || ret.include?(ct)
ret << ct
end
ret
end
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#descendants ⇒ Array<Group>
Return all groups below the current group's path
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# File 'lib/osctld/group.rb', line 201
def descendants
groups = DB::Groups.get.select { |grp| grp.pool == pool }
if root?
groups.drop(1)
else
groups.select { |grp| grp.name.start_with?("#{name}/") }
end.sort! { |a, b| a.name <=> b.name }
end
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#full_cgroup_path(user) ⇒ Object
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# File 'lib/osctld/group.rb', line 120
def full_cgroup_path(user)
File.join(cgroup_path, "user.#{user.name}")
end
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#groups_in_path ⇒ Array<Group>
Return all groups leading to this group's path, i.e. all parents and the group itself.
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# File 'lib/osctld/group.rb', line 178
def groups_in_path
parents + [self]
end
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#has_containers?(user = nil) ⇒ Boolean
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# File 'lib/osctld/group.rb', line 213
def has_containers?(user = nil)
ct = DB::Containers.get.detect do |ct|
ct.pool.name == pool.name \
&& ct.group.name == name \
&& (user.nil? || ct.user.name == user.name)
end
ct ? true : false
end
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#id ⇒ Object
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# File 'lib/osctld/group.rb', line 26
def id
@name
end
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#load_config(config = nil) ⇒ Object
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# File 'lib/osctld/group.rb', line 284
def load_config(config = nil)
if config
cfg = YAML.load(config)
else
cfg = YAML.load_file(config_path)
end
@path = cfg['path'] if root?
@cgparams = CGroup::Params.load(self, cfg['cgparams'])
@devices = Devices::GroupManager.load(self, cfg['devices'] || [])
@attrs = Attributes.load(cfg['attrs'] || {})
end
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#log_type ⇒ Object
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# File 'lib/osctld/group.rb', line 257
def log_type
"group=#{pool.name}:#{name}"
end
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#manipulation_resource ⇒ Object
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# File 'lib/osctld/group.rb', line 261
def manipulation_resource
['group', "#{pool.name}:#{name}"]
end
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#parent ⇒ Group?
Return the closest parent group
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# File 'lib/osctld/group.rb', line 170
def parent
return if root?
parents.last
end
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#parents ⇒ Array<Group>
Return all parent groups, from the root group to the closest parent
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# File 'lib/osctld/group.rb', line 150
def parents
return [] if root?
ret = []
t = ''
name.split('/')[0..-2].each do |n|
t = File.join('/', t, n)
g = DB::Groups.by_path(pool, t)
raise GroupNotFound, "group '#{t}' not found" if g.nil?
ret << g
end
ret
end
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#path ⇒ Object
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# File 'lib/osctld/group.rb', line 34
def path
root? ? @path : File.join(DB::Groups.root(pool).path, name)
end
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#root? ⇒ Boolean
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# File 'lib/osctld/group.rb', line 30
def root?
@root
end
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#save_config ⇒ Object
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# File 'lib/osctld/group.rb', line 265
def save_config
Dir.mkdir(config_dir) unless Dir.exist?(config_dir)
cfg = {
'cgparams' => cgparams.dump,
'devices' => devices.dump,
'attrs' => attrs.dump,
}
cfg['path'] = path if root?
File.open(config_path, 'w', 0400) do |f|
f.write(YAML.dump(cfg))
end
File.chown(0, 0, config_path)
end
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#set(opts) ⇒ Object
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# File 'lib/osctld/group.rb', line 70
def set(opts)
opts.each do |k, v|
case k
when :attrs
attrs.update(v)
else
fail "unsupported option '#{k}'"
end
end
save_config
end
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#setup_for?(user) ⇒ Boolean
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# File 'lib/osctld/group.rb', line 144
def setup_for?(user)
Dir.exist?(userdir(user))
end
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#unset(opts) ⇒ Object
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# File 'lib/osctld/group.rb', line 86
def unset(opts)
opts.each do |k, v|
case k
when :attrs
v.each { |attr| attrs.unset(attr) }
else
fail "unsupported option '#{k}'"
end
end
save_config
end
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#userdir(user) ⇒ Object
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# File 'lib/osctld/group.rb', line 136
def userdir(user)
File.join(
user.userdir,
*name.split('/').drop(1).map { |v| "group.#{v}" },
'cts'
)
end
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#users ⇒ Object
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# File 'lib/osctld/group.rb', line 246
def users
ret = []
DB::Containers.get.each do |ct|
next if ct.pool != pool || ct.group != self || ret.include?(ct.user)
ret << ct.user
end
ret
end
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