When developing playbooks, it’s often necessary to modify Ansible’s default behavior in case of errors.

Here are three common scenarios:

• When a task should only run in a specific mode
• When a task should never report changes
• When a task should fail under certain conditions

Additionally, we’ll explore three scenarios that are useful to know but rarely encountered in practice.

Running Tasks in a specific mode

You can enforce a task to run only in a specific mode. For instance, the following task runs only in check mode (-C):

However, this doesn’t change the task’s behavior, only when it is executed. In check mode, commands that can alter the system are not executed. Each module handles check mode differently.

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