OpenStack

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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. It supports all popular Hypervisors such as KVM, Xen, VMware, HyperV etc...and this integration is made using compute drivers ...

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 was executed. # nova hypervisor-list +----+----------------------------+-------+---------+ | ID | Hypervisor hostname | State | Status | +----+----------------------------+-------+---------+ But the command nova service-list didn't have any problem ...

Error in Sudoers file? Here’s how you can fix it.

It's quite common for an administrator to edit sudoers file and allow users to execute administrative commands. But what if you make an error? The sudo command is going to fail isn't? That's what exactly I did while installing ...

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. ucode: 500" while launching a VM in OpenStack Mitaka. If you are stuck with a similar issue, here's how you can solve ...

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 a button. To do that, you need to login to the Horizon interface and click NETWORK > Networks and ...

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. Here's another one on this topic. On excitement, I created an Instance with a flavor of m1.small and started ...

[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 you can fix the issue. +functions-common:service_check:1674 echo 'Error: Service n-net is not running' Error: Service n-net is not running +functions-common:service_check:1677 '' +functions-common:service_check:1678 die 1678 ...

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 do is to use --availability_zone zone:host argument while executing openstack server create command as shown below: $openstack server create --image --flavor m1.tiny --key_name test ...

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 menu in the dashboard provides summary of various compute hosts, its hypervisor type and usage details - where I was ...

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 complete error message. # apt-get install openstack-dashboard Error: apache2_invoke: Enable configuration openstack-dashboard.conf apache2.service is not active, cannot reload. invoke-rc.d: initscript apache2, action "reload" failed. Setting up ...

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[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 is booted, I tried to login through VNC console. Unfortunately, I didn't knew the username and password and the information was ...

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 neutron database, then here's how you can fix it. Before we see the solution, have a look at the snapshot ...

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 here's what I did to fix it. Before that, have a look at the snapshot of the error thrown while executing ...

[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 as shown below: root@cloudsec1:/usr/share/openstack/cloudgear# keystone tenant-create --name admin --description 'Admin Tenant' --enabled true |grep ' id '|awk '{print $4}' Traceback (most ...

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. Now I could able to boot the VM's. I selected the m1.medium flavor and booted the CentOS virtual image. Upon ...

How to Login to OpenStack Instance or VM via PuTTY using Key?

Question: I installed OpenStack Icehouse on my test bed and was able to create instances successfully. But I was not able to login to CentOS instance via PuTTY using the key file (.pem). However, I was able login via SSH ...

A Simple Guide to Install OpenStack Icehouse on CentOS – Two node Architecture

The word "OpenStack" is quite popular these days. You might have heard this word, even if you are not working in the area of Cloud computing. I have been working in Grid computing domain for the past 10 years and never ...

OpenStack Icehouse Installation Errors and Solutions – CentOS

I have been trying to install OpenStack Icehouse on CentOS for almost a week (Since I'm doing this for the first time, it took a week to complete the entire installation and configuration). Though I followed the official documentation, I still ...

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