What is Datadog?
Datadog is a monitoring and analytics tool for keeping track the performance on applications, services, databases, servers and so on. It is a SaaS model. All you need is to apply an account and deploy an agent app into your hosts. For the deployment it is very simple and you need to run a command according to your hosting OS or platform. They support most of the popular platforms and OS.
Choose the platform and get the online command
For some special integration like database, you need adjust some configuration and you can refer to their user guide. Everything is so simple and you just need to take less than an hour to finish it up.