Glance added the support for interoperable image imports. Image uploads are done using a two-step approach: first uploading it to the Glance API using a local staging area, and then triggering an upload from the staging area to the storage backend. In the case of an HA setup (ie with 3 controller nodes) this requires a shared consistent filesystem across the controller nodes. Otherwise it might happen that the image is uploaded to one node, and triggering the import is executed on a different node - where the image does not exist. Since, 'glance-direct' is disabled by default, now adding support of shared staging location to make glance-direct enabled in case of HA setup.
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Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:3587