How to Fix “nova.compute.manager Stderr: u”qemu-img: Could not open”
All of a sudden, the Hypervisor Summary page in Horizon dashboard was not updating the usage stats of vCPUs, RAM...
OpenStack
Openstack Tutorials
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Fix FTP Passive Mode problem on OpenStack & EC2 VMs
Have you installed VSFTP in your OpenStack or Amazon EC2 VM and getting errors such as “Entering passive mode…connection failed“?... -
Understanding Affinity/Anti-Affinity Group Policies in OpenStack Mitaka
Nova service controls where the instances are started within OpenStack cloud environment. It means, the nova-scheduler decides which hypervisor will... -
OpenStack Fake Driver for Cloud Simulations [Tutorial]
OpenStack is a popular cloud operating system that allows you to control large amount of compute, storage and networking resources.... -
OpenStack Compute Error – No compute node record for host [Solved]
OpenStack compute Error: Though the compute hosts had nova-compute service listening, those nodes were not displayed when ‘nova hypervisor-list‘ command... -
OpenStack VM Launch Error – Last exception: Binding failed for port [Solved]
Error: “Exceeded maximum number of retries. Exceeded max scheduling attempts 3 for instance <instance_id>. Last exception: Binding failed for port.... -
How to Fix OpenStack Error – Failed to delete network? [Solved]
OpenStack Horizon allows you to configure network, subnets, routers etc…It also allows users to delete network with a click of... -
How to resize an Instance in OpenStack Mitaka?
You would have read our earlier posts on Openstack installation and its various configuration setup’s and solutions to installation errors.... -
How to Create Kali Linux Image in QCOW2 format for OpenStack?
If you ever wanted to try Kali Linux in OpenStack, then you have landed on the right page. In this... -
[OpenStack-Devstack]: Error: Service n-net is not running when executing stack.sh
If you are stuck with an error “Service n-net is not running” while installing OpenStack using Devstack, then here’s how... -
How to start a VM on a Specified Host/Compute Node in OpenStack Mitaka?
With the appropriate permissions, the user can launch VM on a specified host/compute node in OpenStack Mitaka. All you need to... -
Why does OpenStack report Hypervisor type as QEMU when libvirt_type is KVM?
I installed OpenStack Mitaka and was curious to check various features in horizon dashboard. For instance, the System > Hypervisors... -
OpenStack Dashboard Installation Error – error processing package openstack-dashboard-ubuntu-theme [Solved]
While installing OpenStack Mitaka horizon module, I was stuck with an error processing package openstack-dashboard-ubuntu-theme. Below is the snapshot of the... -
[Openstack]: Set user password when launching cloud images
I recently installed OpenStack Mitaka on my test bed and imported few images from CentOS & Ubuntu repositories. Once the VM... -
OpenStack Neutron db_sync error – Cannot add a NOT NULL column with default value NULL [Solved]
If you are stuck with an error Cannot add a NOT NULL column with default value NULL while populating or syncing... -
OpenStack Error – Index column size too large. The maximum column size is 767 bytes [Solved]
If you are getting an error while syncing or populating database of services such as Keystone, Glance, Nova and Neutron, then... -
[OpenStack]: from keystoneclient.shell import main ImportError: No module named shell
During one node installation of OpenStack Kilo, I tried creating a tenant and the keystone service failed with an error... -
7 Ways to Detect Virtualization from your VM [Xen,VirtualBox,KVM,OpenStack with KVM]
At Techglimpse we frequently receive mails from our readers asking us to write a tutorial on ‘Virtualization Detection’ from a VPS or... -
How to Create Second Primary or Additional Partition in OpenStack Virtual Machine
Question: I had created a two-node architecture based on Openstack cloud reading your previous article. It was of great help.... -
How to detect Virtualization using Sys::Detect::Virtualization Perl script?
Off late, I started working on a Cloud security project where I need to detect the type of hypervisor that runs...