Up until now, we have visited a set of tools from different third-parties but now we are going to take a look at Stackdriver. Stackdriver was a cloud monitoring solution acquired by Google and integrated (not fully) into Google Cloud Platform. This is an important step for GCP, as being able to provide an integrated monitoring solution is something that's pretty much mandatory nowadays.
With Stackdriver, we are not only able to monitor applications, but also Kubernetes clusters or even standalone VMs. As we will see, the integration is not yet as seamless as we would desire (it might be completed by the time you are reading this), but it is good enough to be considered a big player in the market.