Why launching an instance fails with error "InstanceTypeDiskTooSmall: Instance type's disk is too small for requested image"

Solution Unverified - Updated -

Issue

  • Launching an instance from openstack dashboard or command line fails with below error in /var/log/nova/compute.log.
2014-04-03 10:50:50.832 28855 TRACE nova.compute.manager [instance: 1d603521-ef14-4c98-8f2d-39bf518771b8] InstanceTypeDiskTooSmall: Instance type's disk is too small for requested image.

Environment

  • Red Hat Enterprise Linux Openstack Platform 4.0

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