Class: OsCtld::CGroup::Params
- Inherits:
-
Object
- Object
- OsCtld::CGroup::Params
- Includes:
- OsCtl::Lib::Utils::Log, Lockable
- Defined in:
- lib/osctld/cgroup/params.rb
Direct Known Subclasses
Instance Attribute Summary collapse
-
#owner ⇒ Object
readonly
protected
Returns the value of attribute owner.
-
#params ⇒ Object
readonly
protected
Returns the value of attribute params.
Class Method Summary collapse
-
.load(owner, cfg) ⇒ Object
Load CGroup parameters from config.
Instance Method Summary collapse
-
#apply(keep_going: false) {|subsystem| ... } ⇒ Object
Apply configured cgroup parameters into the system.
- #detect(&block) ⇒ Object
-
#dump ⇒ Object
Dump params to config.
- #dup(new_owner) ⇒ Object
- #each(&block) ⇒ Object
-
#import(new_params) ⇒ Object
Process params from the client and return internal representation.
-
#initialize(owner, params: []) ⇒ Params
constructor
A new instance of Params.
-
#replace(new_params, save: true, &block) ⇒ Object
Replace all parameters by a new list of parameters.
-
#reset(param, keep_going) {|subsystem| ... } ⇒ Object
Reset cgroup parameter to its initial/unlimited value.
- #reset_value(param) ⇒ Object protected
- #set(new_params, append: false, save: true) ⇒ Object
- #unset(del_params, save: true, reset: true, keep_going: false) {|subsystem| ... } ⇒ Object
Methods included from Lockable
#exclusively, included, #inclusively, #init_lock, #lock, #unlock
Constructor Details
#initialize(owner, params: []) ⇒ Params
Returns a new instance of Params.
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# File 'lib/osctld/cgroup/params.rb', line 16 def initialize(owner, params: []) init_lock @owner = owner @params = params end |
Instance Attribute Details
#owner ⇒ Object (readonly, protected)
Returns the value of attribute owner.
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# File 'lib/osctld/cgroup/params.rb', line 182 def owner @owner end |
#params ⇒ Object (readonly, protected)
Returns the value of attribute params.
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# File 'lib/osctld/cgroup/params.rb', line 182 def params @params end |
Class Method Details
Instance Method Details
#apply(keep_going: false) {|subsystem| ... } ⇒ Object
Apply configured cgroup parameters into the system
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# File 'lib/osctld/cgroup/params.rb', line 108 def apply(keep_going: false) params.each do |p| path = File.join(yield(p.subsystem), p.name) begin CGroup.set_param(path, p.value) rescue CGroupFileNotFound raise unless keep_going log( :info, :cgroup, "Skip #{path}, group or parameter does not exist" ) next end end end |
#detect(&block) ⇒ Object
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# File 'lib/osctld/cgroup/params.rb', line 100 def detect(&block) params.detect(&block) end |
#dump ⇒ Object
Dump params to config
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# File 'lib/osctld/cgroup/params.rb', line 169 def dump params.select(&:persistent).map(&:dump) end |
#dup(new_owner) ⇒ Object
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# File 'lib/osctld/cgroup/params.rb', line 173 def dup(new_owner) ret = super() ret.init_lock ret.instance_variable_set('@owner', new_owner) ret.instance_variable_set('@params', params.map(&:clone)) ret end |
#each(&block) ⇒ Object
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# File 'lib/osctld/cgroup/params.rb', line 96 def each(&block) params.each(&block) end |
#import(new_params) ⇒ Object
Process params from the client and return internal representation. Invalid parameters raise an exception.
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# File 'lib/osctld/cgroup/params.rb', line 24 def import(new_params) new_params.map do |hash| p = CGroup::Param.import(hash) # Check if the subsystem is valid subsys = CGroup.real_subsystem(p.subsystem) path = File.join(CGroup::FS, subsys) unless Dir.exist?(path) raise CGroupSubsystemNotFound, "CGroup subsystem '#{p.subsystem}' not found at '#{path}'" end # Check parameter param = File.join(path, 'osctl', p.name) unless File.exist?(param) raise CGroupParameterNotFound, "CGroup parameter '#{param}' not found" end p end end |
#replace(new_params, save: true, &block) ⇒ Object
Replace all parameters by a new list of parameters
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# File 'lib/osctld/cgroup/params.rb', line 131 def replace(new_params, save: true, &block) @params.each do |p| found = new_params.detect do |n| n.subsystem == p.subsystem && n.name == p.name end reset(p, true, &block) unless found end @params = new_params owner.save_config if save end |
#reset(param, keep_going) {|subsystem| ... } ⇒ Object
Reset cgroup parameter to its initial/unlimited value.
Only a limited subset of cgroup parameters is supported.
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# File 'lib/osctld/cgroup/params.rb', line 152 def reset(param, keep_going) v = reset_value(param) return unless v path = File.join(yield(param.subsystem), param.name) CGroup.set_param(path, v) rescue CGroupFileNotFound raise unless keep_going log( :info, :cgroup, "Skip #{path}, group or parameter does not exist" ) end |
#reset_value(param) ⇒ Object (protected)
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# File 'lib/osctld/cgroup/params.rb', line 184 def reset_value(param) case param.name when 'cpu.cfs_quota_us' [-1] when 'memory.limit_in_bytes', 'memory.memsw.limit_in_bytes' [-1] else nil end end |
#set(new_params, append: false, save: true) ⇒ Object
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# File 'lib/osctld/cgroup/params.rb', line 48 def set(new_params, append: false, save: true) exclusively do new_params.each do |new_p| replaced = false params.map! do |p| if p.subsystem == new_p.subsystem && p.name == new_p.name replaced = true new_p.value = p.value + new_p.value if append new_p else p end end next if replaced params << new_p end end owner.save_config if save end |
#unset(del_params, save: true, reset: true, keep_going: false) {|subsystem| ... } ⇒ Object
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# File 'lib/osctld/cgroup/params.rb', line 79 def unset(del_params, save: true, reset: true, keep_going: false, &block) exclusively do del_params.each do |del_h| del_p = CGroup::Param.import(del_h) params.delete_if do |p| del = p.subsystem == del_p.subsystem && p.name == del_p.name next(del) if !del || !reset reset(p, keep_going, &block) true end end end owner.save_config if save end |