Conditional statement examples

 

if statement, using expressions and facts

An if statement, whose conditions are expressions that use facts provided by the agent. 

if $is_virtual {
  warning( 'Tried to include class ntp on virtual machine; this node might be misclassified.' )
}
elsif $operatingsystem == 'Darwin' {
  warning( 'This NTP module does not yet work on our Mac laptops.' )
else {
  include ntp
}

For details about if statements, see Conditional statements and expressions.

if statement, with in expression

An if statement using an in expression. 

if 'www' in $hostname {
  ...
}

For details about if statements, see Conditional statements and expressions.

Case statement

A case statement. 

case $operatingsystem {
  'RedHat', 'CentOS': { include role::redhat  }
  /^(Debian|Ubuntu)$/:{ include role::debian  }
  default:            { include role::generic }
}

For details about case statements, see Conditional statements and expressions.

Selector statement

A selector statement being used to set the value of the $rootgroup variable. 

$rootgroup = $osfamily ? {
    'RedHat'          => 'wheel',
    /(Debian|Ubuntu)/ => 'wheel',
    default            => 'root',
}

For details about selector statements, see Conditional statements and expressions.