Ignore failed commands

ignore_errors can be used to continue even in case of failures.

Defining failure

failed_when can be used to specify what causes failure.

- name: Fail task when the command error output prints FAILED
  ansible.builtin.command: /usr/bin/example-command -x -y -z
  register: command_result
  failed_when: "'FAILED' in command_result.stderr"

Aborting a play on all hosts

On first error, any_errors_fatal: true will stop play execution. max_fail_percentage can be used to abort after a percentage has failed

any_errors_fatal: true

Recovering from errors

rescue section can be used for error handling.

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references: Error handling in playbooks — Ansible Documentation