liusheng created KUDU-3067:
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Summary: Inexplict cloud detection for AWS and OpenStack based
cloud by querying metadata
Key: KUDU-3067
URL: https://issues.apache.org/jira/browse/KUDU-3067
Project: Kudu
Issue Type: Bug
Reporter: liusheng
The cloud detector is used to check the cloud provider of the instance, see
[here|[[1]https://github.com/apache/kudu/blob/master/src/kudu/util/cloud/instance_detector.cc#L59-L93|https://github.com/apache/kudu/blob/master/src/kudu/util/cloud/instance_detector.cc#L59-L93]],
For AWS cloud it using the URL
"http://169.254.169.254/latest/meta-data/instance-id"; to check the specific
metadata to determine it is AWS instance. This is OK, but for OpenStack based
cloud, the metadata is same with AWS, so this URL can also be accessed. So this
cannot distinct the AWS and other OpenStack based clouds. This caused an issue
when run "HybridClockTest.TimeSourceAutoSelection" test case, this test will
use the above URL to detect the Cloud of instance current running on and then
try to call the NTP service, for AWS, the dedicated NTP service is
"169.254.169.123", but for OpenStack based cloud, there isn't such a dedicated
NTP service. So this test case will fail if I run on a instance of OpenStack
based cloud.
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