Well, then you can use landscape.canonical.com which is made by the company behind Ubuntu. It also exists in a open source version, which supports up to 10 servers.
Otherwise there’s Foreman, Ansible, Puppet and probably many more.

https://www.hashicorp.com/ has a great set of tools.

Packer: https://www.packer.io/docs/builders/digitalocean.html
Terraform: https://www.terraform.io/docs/providers/do/index.html
Vault: https://www.vaultproject.io
Nomad: https://www.nomadproject.io
Consul: https://www.consul.io

They work well with shell, ansible, chef, etc…