Attachment 836512 Details for Bug 1038328 – restore cgconfig to individual controller mounts

restore cgconfig to individual controller mounts

restore_cgconfig_mounts.rb (text/x-ruby), 1.58 KB, created by Vincent Batts on 2013-12-13 22:11:28 UTC

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Creator: Vincent Batts

Created: 2013-12-13 22:11:28 UTC

Size: 1.58 KB

patch

obsolete

>#!/usr/bin/env ruby
>
>require 'tempfile'
>require 'fileutils'
>
>=begin
> #       cpuset  = /cgroup/all;
>         cpu     = /cgroup/all;
>=end
>RE = /^(\s*#?\s*)(\w+)(\s*=\s*)\/cgroup\/all\s*;\s*$/
>FILE = "/etc/cgconfig.conf"
>
>def main(args)
>  in_mount = false
>  file_changed  = false
>
>  orig_file = File.open(args.first || FILE)
>  bak_filename = "#{orig_file.path}.bak.#{$$}"
>  FileUtils.cp(orig_file.path, bak_filename)
>  $stderr.puts "backed up [#{orig_file.path}] to [#{bak_filename}]"
>
>  tmp_file = Tempfile.open("cgconfig.")
>  orig_file.each_line do |line|
>    in_mount = false if line.start_with?("}") && in_mount
>    if in_mount && line =~ RE
>      $stderr.puts "amending: #{$2}"
>      file_changed = true
>      tmp_file.puts "#{$1}#{$2}#{$3}/cgroup/#{$2};"
>    else
>      tmp_file.puts line
>    end
>    # at the end, because we still want to see this line
>    in_mount = true if line.start_with?("mount")
>  end
>  orig_file.close
>  tmp_file.flush
>  tmp_file.seek(0)
>
>  unless file_changed
>    FileUtils.rm(bak_filename)
>    $stderr.puts "nothing to do"
>    tmp_file.close
>    return
>  end
>
>  # Truncate before copying (since the new values aren't the same length as "all")
>  begin
>    orig_file = File.open(args.first || FILE, "w")
>    IO.copy_stream(tmp_file, orig_file)
>    $stderr.puts "compare with `diff -u #{bak_filename} #{orig_file.path}`"
>    $stderr.puts "INFO: changes in cgroup mounts require a reboot"
>  rescue => ex
>    $stderr.puts ex
>    $stderr.puts "restored #{orig_file.path}"
>    FileUtils.cp(bak_filename, orig_file.path)
>  ensure
>    orig_file.close
>    tmp_file.close
>  end
>end
>
>main(ARGV)

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Attachments on bug 1038328: 832891 | 832892 | 836496 | 836512 | 848376