Class: OsCtld::Commands::User::LxcUsernet

Inherits:
Base
  • Object
show all
Defined in:
lib/osctld/commands/user/lxc_usernet.rb

Constant Summary collapse

LXC_USERNET = 
'/etc/lxc/lxc-usernet'.freeze
@@mutex = 
Mutex.new

Instance Attribute Summary

Attributes inherited from Base

#client, #client_handler, #id, #opts

Instance Method Summary collapse

Methods inherited from Base

#base_execute, #call_cmd, #call_cmd!, #error, #error!, handle, #handled, #indirect?, #initialize, #manipulate, #manipulation_holder, #ok, #progress, #request_stop, run, run!

Constructor Details

This class inherits a constructor from OsCtld::Commands::Base

Instance Method Details

#execute ⇒ Object 



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# File 'lib/osctld/commands/user/lxc_usernet.rb', line 11

def execute
  @@mutex.synchronize do
    generate
  end

  ok
end

#generate ⇒ Object (protected) 



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# File 'lib/osctld/commands/user/lxc_usernet.rb', line 21

def generate
  f = File.open("#{LXC_USERNET}.new", 'w')

  user_cts = {}

  DB::Containers.each do |ct|
    user_cts[ct.user] ||= []
    user_cts[ct.user] << ct
  end

  DB::Users.each do |u|
    # lxc-user-nic counts db entries by owner, not by the linked bridge name,
    # so we use the total number of user's interfaces for each lxc-usernet entry.
    bridges = []
    netif_cnt = 0

    # Count interfaces per type
    cts = user_cts[u]
    next if cts.nil?

    cts.each do |ct|
      ct.netifs.each do |netif|
        case netif.type
        when :bridge
          bridges << netif.link unless bridges.include?(netif.link)
        end

        netif_cnt += 1
      end
    end

    # Write results
    # We're doubling the amount of allowed interfaces, because of unexplained
    # spurious Quota reached messages from lxc-user-nic.
    f.write("#{u.sysusername} veth none #{netif_cnt * 2}\n")

    bridges.each do |br|
      f.write("#{u.sysusername} veth #{br} #{netif_cnt * 2}\n")
    end
  end

  f.close
  File.rename("#{LXC_USERNET}.new", LXC_USERNET)
end