Thanks to this article – how to create a Windows Image for OpenStack Glance repository.  After uploading the image, I created a separate flavor for Windows VMs with 2 vCPUs, 4GB RAM, and 40GB disk. However, when the Windows VM is booted, I noticed the hard disk space of 20GB,…

While installing pip packages through the requirements file on the minimal CentOS Stream 8 server with python v3.7, encountered the error “No such file or directory c++” during the installation of grpcio package. Below is the complete error message: # pip3 install -r requirements.txt WARNING: Running pip install with root…

Followed the guide from server-world for installing the OpenStack Train version on the CentOS server. Configuring neutron services requires physical access to the terminal, as it requires a restart of the network services. But sometimes, you don’t get to be present in front of the physical terminal and end up…

While finalizing the installation of neutron on controller node, the operation to populate the database failed with Too many connections for neutron-db-manage. Below is the complete error: # su -s /bin/bash neutron -c “neutron-db-manage –config-file /etc/neutron/neutron.conf –config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade head” Traceback (most recent call last): File “/usr/bin/neutron-db-manage”, line 10, in…

On my CentOS 7 minimal server installation, I installed python-pip using YUM. However, the version it has installed is 8.1.2 for Python version 2.7 though the latest version is 22.3.1. Some of the packages needs a higher version of pip atleast above 9.0.1. When tried to upgrade using pip install…

I am trying to install python-pip on CentOS 7 minimal server. However, I got the error No package python-pip available. Below is the complete error message. # yum install python-pip Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.vhost.vn * centos-ceph-nautilus: mirrors.vhost.vn * centos-nfs-ganesha28: mirrors.vhost.vn * centos-qemu-ev:…

As part of OpenStack Yoga release, installed and configured noVNC – a VNC client library based on JavaScript. Essentially, noVNC allows the web browser to act as a VNC client to remotely access a machine. When tried to access the virtual machine console using the console url through browser it…

I was given a task to install OpenStack Yoga release on CentOS Stream 8 Server (minimal Server). I followed the Server World guide for the installation. While installing Keystone using the below command, encountered the error “Unknown repo epel“. # dnf –enablerepo=centos-openstack-yoga,epel,powertools -y install openstack-keystone python3-openstackclient httpd mod_ssl python3-mod_wsgi python3-oauth2client…

After the successful installation of OpenStack Glance, connecting to the Glance API (on port 9292) fails with an error message “failed to contact the endpoint at https://controller.tg.com:9292 for discovery. Fallback to using that endpoint as the base url“. Below is the complete error message: Failed to contact the endpoint at…

While executing the below command, encountered the error “Unknown repo crb“. # dnf –enablerepo=centos-openstack-yoga,epel,crb -y install openstack-glance Error: Unknown repo: ‘crb’ Solution: CRB is known as  CodeReady Linux Builder. However, it is trademarked, and as such, available only in CentOS which has a different name – PowerTools. The PowerTools repository…

While installing the OpenStack Yoga release, after the yum repository setup from the server-world guide, RabbitMQ server installation error showed up as below: [root@controller ~]# dnf -y install rabbitmq-server memcached nginx-mod-stream Last metadata expiration check: 0:00:34 ago on Mon 14 Nov 2022 10:25:26 AM IST. Error: Problem: package erlang-lager-3.8.0-2.el8.noarch requires…

In recent times, on Firefox v102.3.0esr (64-bit) encountered trouble in viewing GMAIL and few other SSL enabled websites with the error message  SSL ERROR HANDSHAKE UNEXPECTED ALERT. However, the same is working fine on Chrome browser. I tried disabling, Anti-Virus, cleared browser cache, etc., but all in VAIN! Secure Connection…

I’m experiencing a Windows10 VM on OpenStack that automatically restarts on successful autologon. Struggling with this for a while and hours spent in search of this topic on google went in vain. Followed the below step-by-step procedure to find the root cause and stop Windows10 VM on OpenStack from automatically…

Recently I created a windows image using QEMU-KVM and ported it onto OpenStack for one of my clients. While creating the windows image I had set the virtual disk size as 40GB. However, the client requested an additional virtual disk of 10GB. In this article, we shall learn how to…

Before we proceed, please read Why does Windows 10 VM show 100% CPU utilization always on QEMU-KVM? The same issue holds for Windows10 VM on OpenStack making it slow and using 100% CPU utilization always. This article shows how to configure OpenStack to run Windows10 VM on a multicore processor utilizing…

You might have read my article on How to Create Windows image for OpenStack and its related articles such as fixing Windows could not parse or process the unattended answer file for Pass Specialize, and How to configure Windows VM Autologin for OpenStack Cloud. To add to the series, here…

I used WebSockify in my web application to connect to the VNC server using noVNC to enable remote access to Linux servers via the browser. It was an easy implementation as there was no firewall involved and the WebSocket port was opened. However, recently I had to migrate to another…

I installed owncloud with all the necessary pre-requisites and when tried to access over the browser encountered error: Cannot write into “Config” directory! Below is the complete error list. How to fix Cannot write into “Config” directory! [OwnCloud] The error above clearly conveys that, the webserver is unable to write…

Earlier I had written an article on How to start GUI on CentOS 8. After this article was read by one of my readers, he asked me to write a similar article for Ubuntu. Typically any Linux servers (CentOS or Ubuntu) don’t provide Graphical User Interface (GUI) as it adds…