Enabling mongo authentication by ansible playbook - mongodb

Question

I trying install mongodb on my server and enable authentication. But I'm stuck on adding user for auth. When I try execute playbook it fails on Add user task with output:
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: pymongo.errors.OperationFailure: there are no users authenticated
fatal: [***]: FAILED! => {"changed": false, "msg": "unable to connect to database: there are no users authenticated"}
How can I fix it?
playbook.yml
- name: Install mongodb
apt:
name: mongodb-org
update_cache: yes
state: present
- name: Set config
template:
src: templates/mongodb.yml
dest: /etc/mongod.conf
notify: restart mongodb
- name: Install pymongo
pip:
name: pymongo
state: present
- name: Add user
mongodb_user:
database: "{{ mongodb_name }}"
name: "{{ mongodb_user }}"
password: "{{ mongodb_password }}"
login_host: "{{ mongodb_bind_ip }}"
login_port: "{{ mongodb_port }}"
state: present
mongodb.yml
net:
port: {{ mongodb_port }}
bindIp: {{ mongodb_bind_ip }}
unixDomainSocket:
enabled: false
security:
authorization: enabled

Answer 1

If you don't have admin user in the database you need to start it with disabled security.authorization, add admin user, then restart mongodb with enabled security.authorization : https://docs.mongodb.com/manual/tutorial/enable-authentication/#procedure
After that you can add more users using admin's credentials:
- name: Add user
mongodb_user:
database: "{{ mongodb_name }}"
name: "{{ mongodb_user }}"
password: "{{ mongodb_password }}"
login_host: "{{ mongodb_bind_ip }}"
login_port: "{{ mongodb_port }}"
login_user: "{{ admin_login }}"
login_password: "{{ admin_password }}"
state: present
https://docs.ansible.com/ansible/2.4/mongodb_user_module.html