CodePre offers a wide variety of tutorials on the topic Openstack.

How to create and configure a bridge network for KVM in Linux

In today’s guide we will look at how to create and configure a bridge network for KVM in Linux-RHEL / CentOS / Ubuntu / Debian / Arch Linuxe.t.c. When using Linux bridges in KVM, virtual machines can access external networks and services outside the virtual environment. There are multiple ways to configure bridged networks for… read more »

Installing a Three-Node OpenStack Queens Cluster-Part 6

Configure Neutron on the controller node Neutron is an OpenStack project designed to provide “network connection as a service” between interface devices (such as vNICs) managed by other OpenStack services (such as nova). It implements the Neutron API. Here are the reasons why we use Neutron: It provides an API for cloud tenants to build… read more »

Installing a Three-Node OpenStack Queens Cluster-Part 8

Configure Neutron on the compute nodes Neutron usually requires plug-in software, such as OpenVswitch. So far, on the Compute node, we have installed Libvirt and Nova Compute. We will add Openvswitch and L2 Agent. “Make sure there are no believers and unbelievers in the religion of love. Love embraces everyone.” ―Rumi step 1: Installing Neutron… read more »

Installing a Three-Node OpenStack Queens Cluster-Part 10

Create and launch Horizon’s virtual machine instance ad install step 1: Sign in with the new user we created earlier in the system and continue to create the instance [[email protected] ~(keystone)]# su – tech ##use your username [[email protected] ~]$ [[email protected] ~]$ vim ~/keystonerc export OS_PROJECT_DOMAIN_NAME=default export OS_USER_DOMAIN_NAME=default export OS_PROJECT_NAME=helloworld #remember the project we had created… read more »

OpenStack deployment on CentOS 7 with Packstack

How to use Packstack to deploy a private OpenStack Cloud on CentOS? OpenStack is a popular free and open source software platform for building public and private clouds. You can use the Packstack installation utility to run an all-in-one OpenStack cloud on CentOS 7 in minutes. After deployment, you have the option to add more… read more »

How to add RHEL 8 qcow2 image to OpenStack Glance

Are you looking for a quick way to add RHEL 8 qcow2 VM images to OpenStack Glance storage? OpenStack Image Service (Glance) Acts as the registry for the virtual disk image. As a user, you can add new images or create a snapshot (copy) of an existing server for immediate storage on Glance. Glance supports… read more »

How to resize an OpenStack instance / virtual machine

How easy is it to resize / scale an OpenStack instance or virtual machine? OpenStack Compute is the central component that provides virtual machines on demand. It enables Sysadmins to create instances with specific hardware specifications (Ram, CPU, and disk space). In OpenStack, each instance created has a style (resource template) that determines the size… read more »

How to create OpenStack projects, users and roles

As an OpenStack cloud administrator, you can create, delete, or modify projects, users, and roles in the Horizon dashboard or the OpenStack CLI. OpenStack users can be members of one or more projects. In OpenStack, a role-based access control (RBAC) mechanism is used to manage access to Cloud resources. This will force authorization if the… read more »

How to assign a floating IP address to an instance in OpenStack

Do you want to assign an OpenStack instance a floating IP address from a public network? After a virtual instance is created in OpenStack, it is automatically assigned a fixed IP address in the network. This IP address is permanently associated with the instance until the instance terminates. OpenStack also gives you an option to… read more »