Hostname on Google Cloud Engine

Update of the hostname on agents running on Google Cloud Engine instances

Prior to 5.5.0, the agent uses an instance's name as a unique hostname for GCE hosts.

This becomes an issue when people run instances with the same name over different projects, as Datadog will consider those as one unique host.

A better behavior is to use an instance's hostname as the hostname, as this is unique across all projects. This is why starting from 5.5.0, we are updating this behavior.

Release process

Datadog's GCE integration relies on the hostname to link agent's data with API's data retrieved by the crawler. For this reason, it's important to update the hostname on the agent and in Datadog at the same time. If you currently are using the agent on GCE and plan to update to 5.5.0, please contact support@datadoghq.com to synchronize updates.

see PR and issue for more details