OpenStack tutorials

  • Nov 12, 2020 8 Min read

    All about Availability Zones and Host Aggregates in OpenStack

    You can use OpenStack availability zones and host aggregates to deploy applications more resiliently.

  • Oct 20, 2020 4 Min read

    Introduction to the concept of SR-IOV

    Virtualization enables sharing of physical resources in a host compute, with multiple virtual machines. The physical resources includes CPU, memory, storage, and IO devices connected via PCI-e bus.

  • Sep 23, 2020 8 Min read

    Introduction to cloud-init

    Cloud OS images from Ubuntu, Fedora, Centos and most other Linux distributions have their password authentication disabled by default. So, every time when creating a VM instance on OpenStack with a Heat template, I have been using user_data directive to set the default password, without really understanding what’s going on inside.

  • Aug 5, 2020 5 Min read

    Cinder with Heat

    Nova adapts ephemeral storage for VMs by default. The ephemeral storage resides on the local hard disks of the host computes and present a virtual disk for each VM. These virtual disks are created at the time of the VM creation, and are deleted with the VM, so are called ephemeral. If the host machine crashes, you lose the VM with all its data stored in disk.

  • Jun 4, 2020 6 Min read

    OpenStack port security

    IP level access control of VMs in OpenStack is implemented via Security Groups. A firm grip on the fundamentals of this security feature, is essental for working with VMs.
  • Feb 25, 2020 5 Min read

    Working with OpenStack API

    OpenStack API could be a bit daunting at the beginning. So, let's deal with that.**
  • Feb 13, 2020 5 Min read

    A Real World HOT File

    Heat is a template based resource orchestration service for OpenStack. It can be used to deploy cloud applications of any complexity.