Hi, I'm a new user of Pulumi, is possible to doin configuration management with pulumi ? Such as install mariadb and so on ?

I think this might help you: https://www.pulumi.com/docs/intro/vs/chef_puppet_etc/

Oh ya, So Pulumi only can do the infra provisioning right ?

I'd say that it depends on the provider because you can also provision SQL tables with postgres provider