Check read/write to nfs.

nfscheck.rb

require "timeout"

pid = fork do
  require "fileutils"
  filepath = "/mnt/nfs/test1/test.txt"
  begin
    File::open(filepath, 
      File::Constants::WRONLY |
      File::Constants::CREAT |
      File::Constants::TRUNC |
      File::Constants::SYNC, 0644) do |f|
        f.write("test")
    end
    FileUtils.rm(filepath)
    exit 0
  rescue => e
    exit 1
  end
end

begin
  timeout(10) do
    code = Process.wait2[1]
    if code == 0
      puts "NFS check successful"
      exit 0
    else
      puts "NFS check failed - R/W Error"
      exit 1
    end
  end
rescue Timeout::Error => e
  puts "NFS check failed - Timeout Error"
  Process.kill('SIGKILL', pid)
  puts "Child process terminated - pid: " + pid.to_s
  exit 1
end