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Puppet supports if and unless statements, case statements, and selectors. Examples An if statement evaluates the given condition and, if the condition resolves to true, executes the given code. This example includes an elsif condition, and gives a warning if you try to include the ntp class on a virtual machine or on machine running macOS:
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Using case statements with notify in Puppet Ask Question Asked 10 years, 3 months ago Modified 8 years, 10 months ago Viewed 4k times 0 class mymodule::scripts::os_check { case $operatingsystem { / (?i-mx:centos)/: { notify ("You are using CentOS")} / (?i-mx:.*)/: { notify ("You are using non-CentOS OS") } } }
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This solution worked very well with another module I wrote, but in this case the home directory path includes a variable, that depends on the user name. Adding the following if statement inside the resource issues an error:
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Order of operations Comparison operators == (equality) != (non-equality) < (less than) > (greater than) <= (less than or equal to) >= (greater than or equal to) =~ (regex or data type match) !~ (regex or data type non-match) in Boolean operators and or ! (not) Arithmetic operators + (addition) - (subtraction and negation) / (division)
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Conditional statements let your Puppet code behave differently in different situations. They are most helpful when combined with facts or with data retrieved from an external source. Summary Puppet supports "if" and "unless" statements, case statements, and selectors. An "if" statement:
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Unlike selectors, the case statement does not return a value. Case statements come in handy when you want to execute different code depending on the value of an expression. In our second example, we used the case statement to include either the debianlike or redhatlike class, depending on the value of $::operatingsystem.. Again, Puppet compares the value of $::operatingsystem to a list of.
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Although you could write any conditional statement using if, Puppet provides a couple of extra forms to help you express conditionals more easily: the selector and the case statement. How to do it… Here are some examples of selector and case statements: Add the following code to your manifest: $systemtype = $::operatingsystem ?
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puppet-lint Case Without A Default Option Case statements should have default cases. Additionally, the default case should fail the catalog compilation when the resulting behavior cannot be predicted on the majority of platforms the module will be used on.
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Puppet's case statement can evaluate expressions and will run the first associated with the first matching case. It doesn't quite support this: case $mem { 0..1023: { $retvalue = "128M" } 1024..6999: { $retvalue = "160M" } 7000.14999: { $retvalue = "192M" } 15000..30999: { $retvalue = "256M" } default: { $retvalue = "512M" } }
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The puppet job tool\nlets you trigger Puppet runs across multiple nodes remotely.
Task 5:
Before using this tool, we'll have to take a few steps via the PE console to set\nup authentication through PE's role-based access control system (RBAC).
\nTo.
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Although you could write any conditional statement using if, Puppet provides a couple of extra forms to help you express conditionals more easily: the selector and the case statement. How to do it… Here are some examples of selector and case statements: Add the following code to your manifest: $systemtype = $::operatingsystem ?
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Conditional statements Quest objectives Learn how to use conditional logic to make your manifests adaptable. Understand the syntax and function of the if, unless, case, and selector statements. Getting started
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Puppet's if statement allows you to change the manifest behavior based on the value of a variable or an expression. With it, you can apply different resources or parameter values depending on certain facts about the node, for example, the operating system, or the memory size.
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Conditional statements let your Puppet code behave differently in different situations. They are most helpful when combined with facts or with data retrieved from an external source. Summary Puppet 2.7 supports "if" statements, case statements, and selectors. An "if" statement:
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Conditional statement examples. if statement, using expressions and facts. if statement, with in expression. Case statement. Selector statement. Node examples. Node definition. Expand. A quick reference of syntax examples for the Puppet language.
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Unlike selectors, the case statement does not return a value. Case statements come in handy when you want to execute different code depending on the value of an expression. In our second example, we used the case statement to include either the debianlike or redhatlike class, depending on the value of $::operatingsystem. Again, Puppet compares.