Github user serbaut commented on the issue:
https://github.com/apache/cloudstack/pull/1919
The VPC VR maintains metadata
(http://docs.cloudstack.apache.org/projects/cloudstack-administration/en/4.8/virtual_machines/user-data.html)
as static files in /var/www/html/metadata. When a VR is destroyed and
recreated (by e.g. "restart with cleanup") this metadata is rebuilt by
createVmDataCommandForVMs(). public-keys is missing from that function so it
becomes empty after the rebuild and a request for latest/meta-data/public-keys
no longer returns the correct key.
This PR adds public-key to the rebuild.
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