Hi folks, we use Ceph Dumpling as storage backend for Openstack Havana. However our instances are not able to resize its root filesystem. This issue just occurs for the virtual root disk. If we start instances with an attached volume, the virtual volume disks size is correct. Our infrastructure: - 1 OpenStack Controller - 1 OpenStack Neutron Node - 1 OpenStack Cinder Node - 4 KVM Hypervisors - 4 Ceph-Storage Nodes including mons - 1 dedicated mon As OS we use Ubuntu 12.04. Our cinder.conf on Cinder Node: volume_driver = cinder.volume.driver.RBDDriver rbd_pool = volumes rbd_secret = SECRET rbd_user = cinder rbd_ceph_conf = /etc/ceph/ceph.conf rbd_max_clone_depth = 5 glance_api_version = 2 Our nova.conf on hypervisors: libvirt_images_type=rbd libvirt_images_rbd_pool=volumes libvirt_images_rbd_ceph_conf=/etc/ceph/ceph.conf rbd_user=admin rbd_secret_uuid=SECRET libvirt_inject_password=false libvirt_inject_key=false libvirt_inject_partition=-2 In our instances we see that the virtual disk isn't _updated_ in its size. It still uses the size specified in the images. We use growrootfs in our images as described in the documentation + verified its functionality (we switched temporarly to LVM as the storage backend, that works). Our images are manually created regarding the documention (means only 1 partition, no swap, cloud-utils etc.). Does anyone has some hints how to solve this issue? Cheers, Hauke