After following the instructions for upgrading from Go 1.9 to 1.11 and then running `go run .` as mentioned in the docs, my web application builds, but crashes on the first request it receives:
panic: Metadata fetch failed for 'instance/attributes/gae_project': Get http://metadata/computeMetadata/v1/instance/attributes/gae_project: dial tcp: lookup metadata on 127.0.0.53:53: server misbehaving
goroutine 30 [running]:
google.golang.org/appengine/internal.mustGetMetadata(0xaa8a5f, 0x1f, 0x0, 0x0, 0x0)
/home/m/projects/go/pkg/mod/google.golang.org/appengine@v1.6.5/internal/metadata.go:34 +0x148
google.golang.org/appengine/internal.partitionlessAppID(0xaa15e4, 0x15)
/home/m/projects/go/pkg/mod/google.golang.org/appengine@v1.6.5/internal/identity_vm.go:112 +0xa2
google.golang.org/appengine/internal.DefaultTicket.func1()
/home/m/projects/go/pkg/mod/google.golang.org/appengine@v1.6.5/internal/api.go:294 +0x9d
sync.(*Once).Do(0x123fa30, 0xaea880)
/usr/local/go/src/sync/once.go:44 +0xb3
google.golang.org/appengine/internal.DefaultTicket(0xc0003e23f0, 0x99a9c0)
/home/m/projects/go/pkg/mod/google.golang.org/appengine@v1.6.5/internal/api.go:289 +0x39
google.golang.org/appengine/internal.Call(0xb97ec0, 0xc0003e23f0, 0xa9960c, 0xa, 0xa93f28, 0x5, 0xb95a40, 0xc000384ec0, 0xb94940, 0xc0003da400, ...)
/home/m/projects/go/pkg/mod/google.golang.org/appengine@v1.6.5/internal/api.go:496 +0x971
google.golang.org/appengine/internal.(*context).flushLog(0xc00021aba0, 0xaeb001, 0xc00008c700)
/home/m/projects/go/pkg/mod/google.golang.org/appengine@v1.6.5/internal/api.go:641 +0x3e7
google.golang.org/appengine/internal.handleHTTP.func1(0xc00008c720, 0xc00021aba0)
/home/m/projects/go/pkg/mod/google.golang.org/appengine@v1.6.5/internal/api.go:138 +0x56
created by google.golang.org/appengine/internal.handleHTTP
/home/m/projects/go/pkg/mod/google.golang.org/appengine@v1.6.5/internal/api.go:134 +0x380
exit status 2
This seems like maybe something else needs to be running locally on my machine. But I can't find any information in the docs. Any ideas?