Hi list:

I want to use kolla-ansible to deploy openstack , but using external mysql. 

I am following these docs:  

https://docs.openstack.org/kolla-ansible/latest/user/quickstart.html

https://docs.openstack.org/kolla-ansible/latest/reference/databases/external-mariadb-guide.html.

I have some questions:

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##  Question 1 ##

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 According to the offical doc , if setting it  in inventory file(multinode), 

kolla-ansible -i ./multinode deploy will throw out error:

I guest when kolla-ansible running the playbook against myexternalmariadbloadbalancer.com , 

the """register: find_custom_fluentd_inputs""" in """TASK [common : Find custom fluentd input config files]"""  maybe null .

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##  Question 2 ##

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 According to the offical doc , If the MariaDB username is not root, set database_username in /etc/kolla/globals.yml file:  

But in kolla-ansible/ansible/roles/xxxxxx/tasks/bootstrap.yml  , they use  ''' login_user: "{{ database_user }}"  ''' ， for example :

So at last  , I took the following steps:

1. """not""" setting [mariadb] in inventory file(multinode)   

2. set "database_user: openstack" for  "privillegeduser"

PS: 

My idea is that if using an external ready-to-use mysql (cluster),  

it is enough to tell kolla-ansible only the address/user/password of the external DB.

i.e. setting them in the file /etc/kolla/globals.yml and passwords.yml , no need to add it into inventory file(multinode)   

Finally , it is successful to  deploy openstack via kolla-ansible . 

So far I have not found any problems.   

 Are the steps what I took  good ( enough ) ? 

Thank you !