How Do I Log Task Output To A File?

One of my ansible tasks imports an Oracle database using impdp.

This generates a lot of output to the console so I have set no_log: True.

However, when this fails I want to see the log!

How can I make this particular task log to a file and not to the console?

I think that all you need to do is to register the output of every command you need (store it in a variable) and then simply dump the variable in a file. That way you can review it later.

tasks:
  - name: Dump all vars
    action: template src=templates/dumpall.j2 dest=/tmp/ansible.all

Then in dumpall.j2:

Module Variables ("vars"):
--------------------------------
{{ vars | to_nice_json }} 

Environment Variables ("environment"):
--------------------------------
{{ environment | to_nice_json }} 

GROUP NAMES Variables ("group_names"):
--------------------------------
{{ group_names | to_nice_json }}

GROUPS Variables ("groups"):
--------------------------------
{{ groups | to_nice_json }}

HOST Variables ("hostvars"):
--------------------------------
{{ hostvars | to_nice_json }}

The example I'm using is from here

StackExchange DevOps Q#1277, answer score: 4