https://techglimpse.com For all your Tech Needs! Tue, 12 Sep 2023 16:40:35 +0000 en-US hourly 1 https://wordpress.org/?v=5.4.6 How to configure VM resizing and migration between hypervisors [OpenStack] https://techglimpse.com/configure-vm-resizing-and-migration-hypervisors-openstack/ https://techglimpse.com/configure-vm-resizing-and-migration-hypervisors-openstack/#respond Tue, 12 Sep 2023 09:15:58 +0000 https://techglimpse.com/?post_type=ht_kb&p=43643 When VM resizing or cold migrating between hypervisors, it’s highly probable that you will come across an SSH error indicating “Permission denied” as below in /var/log/nova/nova-compute.log of host that is running the instance for cold migration. ERROR oslo_messaging.rpc.server Traceback (most recent call last): ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 165, in...

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]]> 0 Openstack Live Migration error with Unacceptable CPU info: CPU doesn’t have compatibility https://techglimpse.com/openstack-live-migration-error-with-unacceptable-cpu-info-cpu-doesnt-have-compatibility/ https://techglimpse.com/openstack-live-migration-error-with-unacceptable-cpu-info-cpu-doesnt-have-compatibility/#respond Tue, 12 Sep 2023 04:42:45 +0000 https://techglimpse.com/?post_type=ht_kb&p=43639 I hope you know that OpenStack, offers a valuable feature called “live migration” that allows to move virtual machines (VMs) from one physical host to another without causing downtime. It is an essential capability for maintaining high availability and optimizing resource usage in cloud environments. However, while configuring and performing...

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]]> 0 How to customize OpenStack Horizon Dashboard https://techglimpse.com/customize-openstack-horizon-dashboard/ https://techglimpse.com/customize-openstack-horizon-dashboard/#respond Fri, 08 Sep 2023 04:54:20 +0000 https://techglimpse.com/?post_type=ht_kb&p=43457 Customize OpenStack Horizon Dashboard allows you to tailor the interface to your specific needs and preferences such as its appearance, including logos, colors, and styles, to match the organization’s branding. Let’s dive into start rebrand OpenStack Horizon dashboard. How to customize OpenStack Horizon Dashboard? Following guide will help to customize...

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]]> 0 [Openstack nova]: No valid host found for resize https://techglimpse.com/openstack-nova-error-no-valid-host-found-for-resize/ https://techglimpse.com/openstack-nova-error-no-valid-host-found-for-resize/#respond Tue, 05 Sep 2023 09:27:36 +0000 https://techglimpse.com/?post_type=ht_kb&p=43583 On my OpenStack setup with 2-nodes, 1-controller+compute and 1-compute node, I got the error message “No valid host was found. No valid host found for resize” during resize of a VM. Below are the detailed message in nova-api.log nova-scheduler.log & nova-conductor.log: # vim /var/log/nova/nova-api.log 2023-03-23 10:45:19.441 3219 INFO nova.api.openstack.wsgi [req-4d2542f9-38f4-4900-88d9-b1c987651ebf...

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]]> 0 How to automatically extend windows virtual disk size [Openstack] https://techglimpse.com/automatically-extend-windows-storage-disk-size-openstack/ https://techglimpse.com/automatically-extend-windows-storage-disk-size-openstack/#respond Thu, 08 Dec 2022 08:17:51 +0000 https://techglimpse.com/?post_type=ht_kb&p=43466 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,...

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]]> 0 How to configure Open vSwitch bridge for OpenStack https://techglimpse.com/open-vswitch-bridge-openstack/ https://techglimpse.com/open-vswitch-bridge-openstack/#respond Wed, 07 Dec 2022 04:43:04 +0000 https://techglimpse.com/?post_type=ht_kb&p=43433 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...

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]]> 0 Too many connections for neutron-db-manage [MySQL] https://techglimpse.com/too-many-connections-neutron-db-manage/ https://techglimpse.com/too-many-connections-neutron-db-manage/#respond Tue, 06 Dec 2022 11:29:22 +0000 https://techglimpse.com/?post_type=ht_kb&p=43441 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...

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]]> 0 [OpenStack noVNC]: Code 400, message Client must support ‘binary’ or ‘base64’ protocol [Solved] https://techglimpse.com/openstack-novnc-code-400-base64-protocol-error/ https://techglimpse.com/openstack-novnc-code-400-base64-protocol-error/#respond Thu, 24 Nov 2022 08:52:41 +0000 https://techglimpse.com/?post_type=ht_kb&p=43409 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...

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]]> 0 [OpenStack Glance]: Failed to contact the endpoint at https://localhost:9292 for discovery. https://techglimpse.com/openstack-image-discovery-failed-contact-endpoint/ https://techglimpse.com/openstack-image-discovery-failed-contact-endpoint/#respond Mon, 21 Nov 2022 09:56:01 +0000 https://techglimpse.com/?post_type=ht_kb&p=43394 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...

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]]> 0 [OpenStack]: Yum RabbitMQ installation error on CentOS Stream 8 https://techglimpse.com/rabbitmq-server-installation-error-yum-centos8stream/ https://techglimpse.com/rabbitmq-server-installation-error-yum-centos8stream/#respond Fri, 18 Nov 2022 09:39:24 +0000 https://techglimpse.com/?post_type=ht_kb&p=43382 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...

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