当清单中有错误时，木偶工作流程会停止吗？

Question

I am looking out options for making my puppet run stop as in when I see some failure in some check inside a manifest.

When I execute puppet agent -t on the node, if there is some error in manifest, it should stop the execution rather than proceeding with the remaining manifest.

I tried the command "fail", if the file cannot be found on the node, but I got this error

Error: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Resource Statement, Evaluation Error: Error while evaluating a Function Call

I was trying something similar below, if the file exist then notify I am present else fail and stop the execution

$file = "/tmp/file"
exec { "chk_${file}_exist":
  command => "true",
  path    =>  ["/usr/bin","/usr/sbin", "/bin"],
  onlyif  => "test -f ${file}"
}
-> if !(Exec["chk_${file}_exist"]) {
      fail('I am failing')
        }
else {
      notify { 'I am present  ":}
}

Answer 1

To the best of my knowledge, there is no general-purpose mechanism in Puppet to make catalog application abort completely upon failure of a single resource, though such a feature has been requested before . One generally approaches such a question with a bit more precision, via one facet or another of resource relationships .

If you have one resource whose correct application depends on another specific resource having successfully been applied first, then you describe that to Puppet by declaring a relationship between the two, using either one of the chaining operators or one of the resource metaparameters designated for that purpose ( before , require , notify , subscribe ). That will ensure both the relative order of application of those resources, and that no attempt is made to apply the dependent one if applying the dependency fails. You can apply that concept to groups of resources by establishing relationships with classes or defined-type instances on one or both sides, or even by bringing run stages to bear.

There is currently no way, however, to make catalog application overall to halt immediately upon resource failure when there remain resources that are eligible to be applied.