What happens when the exec's onlyif condition fails?

When the onlyif condition of an exec resource fails, the behavior is that the exec command will be skipped. The onlyif attribute in Puppet is used to control the execution of the command based on a specific condition. If the command specified in onlyif evaluates to false, it indicates that the condition for executing the command has not been met, and as a result, Puppet will not run the command designated in the exec resource.

This is particularly useful for ensuring that commands are only executed when necessary, helping to avoid unnecessary changes or operations on the system. By utilizing the onlyif condition, you ensure that the operations managed by exec resources are conditional and only happen under the right circumstances, promoting idempotence and reducing potential errors or disruptions in the managed environment.

In contrast to this, when the condition succeeds, the exec command would proceed, reflecting the intended design of conditional execution using Puppet's declarative language.