User:Razzi/Experiment: use puppet notice to show variable

The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

With puppet code like:

hack $ cat manifests/scope_example.pp
# scope-example.pp
# Run with puppet apply --certname www1.example.com scope-example.pp
$myvar = "Top scope value"
node 'localhost' {
  $myvar = "Node scope value"
  notice( "from www1: $myvar" )
  include myclass
}
node 'db1.example.com' {
  notice( "from db1: $myvar" )
  include myclass
}
class myclass {
  $myvar = "Local scope value"
  notice( "from myclass: $myvar" )
}

You can do

hack $ puppet apply manifests/scope_example.pp --certname localhost
Notice: Scope(Node[localhost]): from www1: Node scope value
Notice: Scope(Class[Myclass]): from myclass: Local scope value
Notice: Compiled catalog for localhost in environment production in 0.01 seconds
Notice: Applied catalog in 0.00 seconds

You can even use puppet apply -e on a server:

razzi@datahubsearch1001:~$ sudo puppet apply -e 'notice($::fqdn)'
Notice: Scope(Class[main]): datahubsearch1001.eqiad.wmnet
Notice: Compiled catalog for datahubsearch1001.eqiad.wmnet in environment production in 0.02 seconds
Notice: Applied catalog in 0.30 seconds