Pretty much all that happens between logging "Seeing if we can get any data from <class 'cloudinit.sources.DataSourceGCE.DataSourceGCE'>" in cloudinit.sources and "http://metadata.google.internal/computeMetadata/v1/ is not resolvable" in cloudinit.sources.DataSourceGCE is that we attempt to resolve that address.
So, my first guess is that something weird is happening with DNS resolution; I'm going to attempt to add some logging to check this.
Pretty much all that happens between logging "Seeing if we can get any data from <class 'cloudinit. sources. DataSourceGCE. DataSourceGCE' >" in cloudinit.sources and "http:// metadata. google. internal/ computeMetadata /v1/ is not resolvable" in cloudinit. sources. DataSourceGCE is that we attempt to resolve that address.
So, my first guess is that something weird is happening with DNS resolution; I'm going to attempt to add some logging to check this.