OpenStack can use diffirent backend technologies for Cinder Volumes Service to create volumes for Instances running in cloud. The default and most common backend used for Cinder Service is LVM (Logical Volume Manager), but it has one basic disadventage – […]
Pretty often after rebooting Controller node or powering it on after shutdown, the Horizon (OpenStack Dashboard) is not responding, but we know that it worked before reboot. This issue may be caused by httpd service (Apache), which entered failed state […]
Few times during KVM based OpenStack (Mitaka, Newton) automated installations using packstack we encountered DB synchronization errors. It turned out, that these installation errors appeared due to slow network and/or poor hardware performance of KVM virtualized hardware used to build […]
If you transfer qcow2 images very frequently across OpenStack Clouds or between KVM and Openstack environments, they can quickly grow larger. Luckily qcow2 image size can be decreased to reasonable values using qemu-img tool. During image conversion the empty sectors […]
Kali Linux is a Debian-derived Linux distribution designed for digital forensics and penetration testing. Kali Linux can run natively when installed on a computer’s hard disk, can be booted from a live CD or live USB, or it can run […]
The administration of the large-scale production cloud environments requires the management of dozens of customer’s virtual servers (OpenStack Instances) in the cloud on the daily basis. Manual configuration of the multiple newly created Instances in the OpenStack cloud at a […]
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 […]
After OpenStack installation it can turn out, that the IP allocation pool of the subnet, we have just created is too small. If the allocation pool refers to public / provider network, we will quickly run out of free Floating […]
In this tutorial we will install OpenStack Kilo release from RDO repository on three nodes (Controller, Network, Compute) based on CentOS 7 operating system using packstack automated script. The following installation utilizes VLAN based internal software network infrastructure for communication […]
In OpenStack Dashboard (Horizon), when I launch an Instance and I am trying to connect to the Instance via Dashboard VNC Console – I am getting error: Failed to connect to server (code: 1006). This is most often caused by […]
