When do you need a lineinfile in Ansible?
This is primarily useful when you want to change a single line in a file only. See the ansible.builtin.replace module if you want to change multiple, similar lines or check ansible.builtin.blockinfile if you want to insert/update/remove a block of lines in a file. For other cases, see the ansible.builtin.copy or ansible.builtin.template modules.
What happens to the expanded line parameter in Ansible?
This parameter changes the operation of the module slightly; insertbefore and insertafter will be ignored, and if the regexp does not match anywhere in the file, the file will be left unchanged. If the regexp does match, the last matching line will be replaced by the expanded line parameter.
How to create a nested loop in Ansible?
This directive specifies a variable name to contain the current loop index: index_var is 0 indexed. New in version 2.1. You can nest two looping tasks using include_tasks. However, by default Ansible sets the loop variable item for each loop. This means the inner, nested loop will overwrite the value of item from the outer loop.
When to use insertAfter and insertBefore in Ansible?
Used with state=present. If specified, the file will be created if it does not already exist. By default it will fail if the file is missing. Used with insertafter or insertbefore. If set, insertafter and insertbefore will work with the first line that matches the given regular expression.
How to read the content of an external file with Ansible?
Ansible comes with a whole bunch of Lookup plugins that allow loading stuff from the outside your play. The one we are interested in today is the file one. So, how do I load the content of my file with this? And bam, you have the content in the file_contents variable!
Which is an example of unsafe writing in Ansible?
One example is docker mounted files, which cannot be updated atomically from inside the container and can only be written in an unsafe manner. This option allows Ansible to fall back to unsafe methods of updating files when atomic operations fail (however, it doesn’t force Ansible to perform unsafe writes).