Matt Riedemann 7bcd581c78 Add policy rule to block image-backed servers with 0 root disk flavor ... This adds a new policy rule which defaults to behave in a backward compatible way, but will allow operators to enforce that servers created with a zero disk flavor must also be volume-backed servers. Allowing users to upload their own images and create image-backed servers on local disk with zero root disk size flavors can be potentially hazardous if the size of the image is unexpectedly large, since it can consume the local disk (or shared storage pool). It should be noted that disabling the new policy rule will result in a non-backward compatible API behavior change and no microversion is being introduced for this because enforcement via a new microversion would not close the security gap on any previous microversions. Related compute API reference and user documentation is updated to mention the policy rule along with a release note since this is tied to a security bug, which will be backported to stable branches. Conflicts: nova/policies/servers.py nova/tests/unit/test_policy.py NOTE(mriedem): The conflict is due to not having change Iedd3fea0e86648fae364f075915555dcb2c4f199 in Queens for trusted certs. Change-Id: Id67e1285a0522474844de130c9263e11868f67fb Closes-Bug: #1739646 (cherry picked from commit 763fd62464)		2018-06-18 13:51:41 -04:00
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source	Add policy rule to block image-backed servers with 0 root disk flavor	2018-06-18 13:51:41 -04:00