Class: Vzlimit::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/vzlimit/cli.rb

Constant Summary collapse

ACTIONS = 
[:limit, :list]
VZ_CONF_DIR = 
'/etc/vz/conf'

Instance Method Summary collapse

Constructor Details

#initialize(stdout, arguments) ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/vzlimit/cli.rb', line 10

def initialize(stdout, arguments)
  @stdout = stdout
  @arguments = arguments
  @h = HighLine.new
  
  begin
    # Check action argument
if !@arguments[0] || (!ACTIONS.include?(@arguments[0].to_sym) &&! @arguments[0] =~ /^-.*/)
      usage
    end
    
    # list
    if @arguments[0].to_sym == :list
      list
    end
    
    # limit
    if @arguments[0].to_sym == :set
      set
    end

# help
if @arguments[0] == '-h' || @arguments[0] == '--help'
	help
end

# version
    if @arguments[0] == '-v' || @arguments[0] == '--version'
      version
    end
  rescue
    @h.say $!
  end
end

Instance Method Details

#execute(command) ⇒ Object 



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# File 'lib/vzlimit/cli.rb', line 193

def execute(command)
  @h.say "Will execute the following command:"
  @h.say "=================================================================================="
  @h.say command
  @h.say "=================================================================================="
  
  unless @h.agree @h.color("Execute this command?", :red) + " [yes/no]  "
    raise 'User aborted.'
  end
  
  retval = system command
  raise @h.color "Error: Command execution failed, exit status #{$?}.", :red unless retval
end

#help ⇒ Object 



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# File 'lib/vzlimit/cli.rb', line 216

def help
	@h.say "vzlimit list | set <veid>"
	@h.say "vzlimit set <veid>"
 		@h.say "\t[--ram, -r <soft-limit-in-mb>:<hard-limit-in-mb>]"
 		@h.say "\t[--diskspace, -d <soft-limit-in-mb>:<hard-limit-in-mb>]"
	@h.say "vzlimit --help, -h"
	@h.say "vzlimit --version, -v"
end

#limit_disk_space(vpsid, disk) ⇒ Object 



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# File 'lib/vzlimit/cli.rb', line 170

def limit_disk_space(vpsid, disk)
  # Get separate soft and hard limit
  soft_mb, hard_mb = disk.split(':')
  
  # Desaster validation
  if soft_mb.to_f > hard_mb.to_f || soft_mb.to_f < 0 || hard_mb.to_f < 0
    raise "Disk limits not valid."
  end
  
  # Convert MB limits to 1K-block
  soft = (soft_mb.to_f * 1024).to_i
  hard = (hard_mb.to_f * 1024).to_i
  
  # Execute command 
  execute "vzctl set #{vpsid} --diskspace #{soft}:#{hard} --save"
  
  # Success message
  @h.say @h.color "Diskspace limits have been set:", :green
  @h.say "  VPS-ID:             #{vpsid}"
  @h.say "  Soft memory limit:  #{soft_mb} MB"
  @h.say "  Hard memory limit:  #{hard_mb} MB"
end

#limit_memory(vpsid, memory) ⇒ Object 



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# File 'lib/vzlimit/cli.rb', line 147

def limit_memory(vpsid, memory)
  # Get separate soft and hard limit
  soft_mb, hard_mb = memory.split(':')
  
  # Desaster validation
  if soft_mb.to_f > hard_mb.to_f || soft_mb.to_f < 0 || hard_mb.to_f < 0
    raise "Memory limits not valid."
  end
  
  # Convert MB limits to mempages
  soft = (soft_mb.to_f * 1024 / 4).to_i
  hard = (hard_mb.to_f * 1024 / 4).to_i
  
  # Execute command 
  execute "vzctl set #{vpsid} --privvmpages #{soft}:#{hard} --save"
  
  # Success message
  @h.say @h.color "Memory limits have been set:", :green
  @h.say "  VPS-ID:             #{vpsid}"
  @h.say "  Soft memory limit:  #{soft_mb} MB"
  @h.say "  Hard memory limit:  #{hard_mb} MB"
end

#list ⇒ Object 



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# File 'lib/vzlimit/cli.rb', line 45

def list
  # Scan directory /etc/vz/conf/
  conf_files = Dir.entries(VZ_CONF_DIR)
  
  vps_list = []
  
  conf_files.each do |file|
    if !(file =~ /^\d\d+\.conf$/)
      next;
    end
    
    vpsid = /^(\d\d+)/.match(file)[0]
    conf = File.open(VZ_CONF_DIR + '/' + file, "rb").read
    
    # Get memory limits
    null, memory_soft, memory_hard = /\nPRIVVMPAGES="(\d+):(\d+)"\n/.match(conf).to_a
    memory_soft = (memory_soft.to_f / 1024 * 4).to_i.to_s
    memory_hard = (memory_hard.to_f / 1024 * 4).to_i.to_s
    
    # Get diskspace limits
    null, diskspace_soft, diskspace_hard = /\nDISKSPACE="(\d+):(\d+)"\n/.match(conf).to_a
    diskspace_soft = (diskspace_soft.to_f / 1024).to_i.to_s
    diskspace_hard = (diskspace_hard.to_f / 1024).to_i.to_s
    
    # Get ip
    ip = /\nIP_ADDRESS="(\d+\.\d+\.\d+\.\d+)"\n/.match(conf)[1]
    
    vps_list << {
      :vpsid            => vpsid,
      :ip               => ip,
      :memory_soft      => @h.color(memory_soft + ' MB', :yellow),
      :memory_hard      => @h.color(memory_hard + ' MB', :red),
      :diskspace_soft   => @h.color(diskspace_soft + ' MB', :yellow),
      :diskspace_hard   => @h.color(diskspace_hard + ' MB', :red) 
    }
    
    #vps_list << [
    #  vpsid + "e[32mDONEe[0m",
    #  ip,
    #  memory_soft,
    #  memory_hard,
    #  diskspace_soft,
    #  diskspace_hard
    #]
  end
  
  #@h.say Hirb::Helpers::Table.render(vps_list, 
  #  :fields => [:vpsid, :ip, :memory_soft, :memory_hard, :diskspace_soft, :diskspace_hard],
  #  :headers => {:vpsid => 'CTID', :ip => 'IP', :memory_soft => 'MEMORY SOFT LIMIT', :memory_hard => 'MEMORY HARD LIMIT', :diskspace_soft => 'DISKSPACE SOFT LIMIT', :diskspace_hard => 'DISKSPACE HARD LIMIT'}
  #)
  HighLine.use_color=false

  @h.say sprintf("%-8s\t%-15s\t%-20s\t%-20s\t%-20s\t%-20s", 'CTID', 'IP', 'MEMORY SOFT LIMIT', 'MEMORY HARD LIMIT', 'DISKSPACE SOFT LIMIT', 'DISKSPACE HARD LIMIT') + "\n"
  @h.say sprintf("%-8s\t%-15s\t%-17s\t%-17s\t%-20s\t%-20s", '='*8, '='*15, '='*17, '='*17, '='*20, '='*20) + "\n"

  vps_list.each do |vps|
    @h.say sprintf("%-8s\t%-15s\t%-17s\t\t%-17s\t\t%-20s\t\t%-20s", vps[:vpsid], vps[:ip], vps[:memory_soft], vps[:memory_hard], vps[:diskspace_soft], vps[:diskspace_hard]) + "\n"
  end
  
  #@h.say sprintf("%10sworld", "hello");
  #@h.say @h.list vps_list, :columns_down
  
end

#set ⇒ Object 



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# File 'lib/vzlimit/cli.rb', line 109

def set
  @arguments.shift
  usage = 'Usage: vzlimit set vpsid [options]'
  raise usage unless @arguments[0]
  
  vpsid = @arguments.shift
  memory = nil
  disk = nil
  
  while (arg = @arguments.shift) do
    if ['-r', '--ram'].include? arg
      memory = @arguments.shift
      
      if !(memory =~ /^[-+]?[0-9]*\.?[0-9]+:[-+]?[0-9]*\.?[0-9]+$/)
        raise "Usage: vzlimit set vpsid #{arg} soft:hard"
      end
    elsif ['-d', '--diskspace'].include? arg
      disk = @arguments.shift
      
      if !(disk =~ /^\d+:\d+$/)
        raise "Usage: vzlimit set vpsid #{arg} soft:hard"
      end
    else
      raise "Argument #{arg} not valid for action 'set'."
    end
  end
  
  if !memory &&! disk
    raise "Nothing to set."
  end
  
  # Limit memory
  limit_memory(vpsid, memory) if memory
  
  # Limit disk space
  limit_disk_space(vpsid, disk) if disk
end

#usage ⇒ Object 



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# File 'lib/vzlimit/cli.rb', line 207

def usage
  @h.say "Usage: vzlimit action [params...]"
  exit
end

#version ⇒ Object 



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# File 'lib/vzlimit/cli.rb', line 212

def version
	@h.say "vzlimit version #{VERSION}"
end