Puppet:如果> 80个字符,如何将命令包装成两行？

Question

在puppet中,如果define命令> 80个字符,我怎么能用两行来包含它呢？

  exec { 'create_domain':
    command => "some command exceed 80 character...........................................................how to do how to do?.......",
  }

Answer 1

这有点难看,但如果字符串中的最后一个字符是'\'后跟换行符,那么该字符串将在下一行继续.我的sample.pp清单如下:

class test {
        exec { 'create_domain':
                command => "/bin/echo 1234567890123456789012345678901234567890123456789012345678901234567890\
wrapped > /var/tmp/test.txt";
        }
}

node 'pwan-central' {
        include test
}

使用Puppet 2.7.1在Ubuntu 11.10上使用'puppet apply sample.pp'运行此命令会得到以下输出

mrpwan@pwan-central:~$ puppet apply sample.pp
notice: /Stage[main]/Test/Exec[create_domain]/returns: executed successfully
notice: Finished catalog run in 0.10 seconds

捕获创建的文件显示行已包装:

mrpwan@pwan-central:~$ cat /var/tmp/test.txt 
1234567890123456789012345678901234567890123456789012345678901234567890wrapped

请参阅https://github.com/puppetlabs/puppet/blob/9fbb36de/lib/puppet/parser/lexer.rb#L537(自Puppet v2.7.0起)

这也是一个已知问题:http://projects.puppetlabs.com/issues/5022

Answer 2

从Puppet 3.5开始,你有两个我用过的选项.Ruby允许您通过几行连接字符串.

string = "line #1"\
         "line #2"\
         "line #3"

p string # => "line #1line #2line #3"

另一个选择,从Puppet 3.5开始,他们添加了HereDoc功能.这将允许您将字符串放在源代码文件的一部分中,该部分文件被视为单独的文件.

$mytext = @(EOT)
    This block of text is
    visibly separated from
    everything around it.
    | EOT

puppet文档在这里:https://docs.puppet.com/puppet/4.9/lang_data_string.html#heredocs

Answer 3

对于大块数据，heredocs是处理Puppet清单中的长行的最佳方法。该/L插补选项特别有用。/L导致\行尾删除换行符。例如，以下代码可以满足您的期望，去除缩进和换行符，包括结尾的换行符。

  sshkey { 'example.com':
    ensure  => present,
    type    => 'ssh-rsa',
    key     => @(KEY/L),
      RfrXBrU1T6qMNllnhXsJdaud9yBgWWm6OprdEQ3rpkTvCc9kJKH0k8MNfKxeBiGZVsUn435q\
      e83opnamtGBz17gUOrzjfmpRuBaDDGmGGTPcO8Dohwz1zYuir93bJmxkNldjogbjAWPfrX10\
      8aoDw26K12sK61lOt6GTdR9yjDPdG4zL5G3ZjXCuDyQ6mzcNHdAPPFRQdlRRyCtG2sQWpWan\
      3AlYe6h6bG48thlo6vyNvOD8s9K0YBnwl596DJiNCY6EsxnSAhA3Uf9jeKqlVqqrxhEzHufx\
      07iP1nXIXCMUV
      |-KEY
    target  => '/home/user/.ssh/known_hosts',
  }

Answer 4

如果您真的关心 80 列限制，您可以随时滥用模板来实现该目标

exec {'VeryLongExec':
    command => template("${module}/verylongexec")
 }

然后将实际命令放入该模板文件中

学分应由 Jan Vansteenkiste 计算