OpenStack Snapshots can be utilized to backup Instance before some critical changes are made on Instance OS or to migrate Instance to the new OpenStack Cloud. In this tutorial we will create snapshot from existing Instance to launch it in […]
qemu-img is a QEMU disk image utility, which allows us to create, convert and modify images offline. It can handle all image formats supported by QEMU (including qcow2 and raw image format).
Sometimes I need to edit files inside qcow2 or raw image, but for some reason I don’t want to launch the image in KVM or in Openstack cloud. The image can be edited offline using virt-edit tool.
Docker is a software which automates the deployment of applications inside Linux containers, by providing an additional layer of abstraction. This guarantees that it will always run the same, regardless of the environment it is running in. Docker uses the […]
Typical OpenStack cloud setup consists of more than one node (usually one Controller node and several Compute nodes), which requires lot of physical computers / servers available to perform the installation. This complicates the situation, especially if we need to […]