How can error handling and failures be implemented when executing tasks in Ansible?

In Ansible, there are several approaches to handle errors and failures during task execution:

• ignore_errors: allows the playbook to continue even if a task fails.

- name: Copy file
  copy:
    src: /tmp/file
    dest: /etc/file
  ignore_errors: yes

• block/rescue/always: blocks for grouping tasks with error handling. In the rescue block, you can define actions to take when an error occurs.

- block:
    - name: Execute a critical task
      command: /bin/false
  rescue:
    - name: Handle error
      debug:
        msg: "An error occurred, performing recovery"
  always:
    - name: Always executed
      debug:
        msg: "End of block"

• failed_when: allows setting a condition under which a task is considered failed.

• register + when: allows saving the result of a task and making decisions based on it.

By combining these mechanisms, you can flexibly control the behavior of playbooks in case of errors and failures.