The trove development environment is typically a linux VM within which openstack is installed, and trove launches guest vm's within that environment. To make it possible for these vm's to launch in one human lifetime, one must set vt/x and enable nested hypervisors to use with kvm; qemu emulation will take way too long. The new libvirtd (v2.5.0) in Ubuntu Cloud Archive doesn't handle nested hypervisors well and if you use it, you end up with a guest hanging on the GRUB line. To enable that use-case, we provide ENABLE_UBUNTU_CLOUD_ARCHIVE which the trove developer can set (to False) before running devstack. Change-Id: Ia0265c67bb7d2a438575a03c0ddbf2d9c53266ed Closes-Bug: #1689370
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