Commits on Jul 19, 2022

1. Replace address resolve with snapshot labels …

   Previously, the demux-snapshotter had to make an http request to the
   http-address-resolver to find the vsock address and metrics
   configuration for a remote snapshotter. With this change, the
   http-address-resolver is removed and this information is sent to the
   demux-snapshotter via snapshot labels directly from the client.
   
   The labels are sent to the demux-snapshotter in the first pepare call
   at which point the demux-snapshotter will establish connection with the
   remote snapshotter. The connection is then cached via the namespace key
   as it was in the previous implementation for subsequent calls.
   
   Since each microVM houses its own remote snapshotter in a clean slate on
   boot, any snapshot API call before a prepare will be operating on an empty
   snapshotter and therefore will be a noop/not found. Therefore, if we
   don't have a connection for an API, we can treat it as the noop/not found
   case.
   
   Signed-off-by: Kern Walster <walster@amazon.com>

   

   Kern-- committed Jul 19, 2022
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