Tag Archives: devstack

Vagrant and Devstack

Cloud Platforms, DevOps & Automation, ,

Openstack is a Cloud Orchestration software. Devstack script provides a development environment for Openstack. Devstack provides a great way to get hands-on with Openstack. I had written 2 earlier blogs on installing Devstack for Openstack Icehouse and Openstack Juno. I received multiple queries on installation related issues. To make this simple, I created Vagrant images for different Openstack releases. With this, VM creation and Devstack installation can all be done with a single script. In this blog, I will walk-thru the steps for the installation.

Vagrant makes it easier to create and share VMs and this makes Vagrant Devops friendly. For getting started on Vagrant, you can refer  to my earlier blog on Vagrant.

My Development environment:

Windows 7 machine with Virtualbox 4.3.28 and Vagrant 1.7.2.

Pre-requisites:

Following are typical issues I have seen folks facing when running Devstack:

  • There are some pre-requisite software that needs to be installed before running Devstack like setting up Python environment etc.
  • It is needed to setup VM with atleast 4G RAM and 8G hard disk. Otherwise, either Stacking will fail or instance creation will fail.

Continue reading Vagrant and Devstack →

Openstack Juno – Management interfaces

Cloud Platforms, DevOps & Automation, Programming, , , ,

This blog is part of my series on Openstack Juno. In this blog, I will cover different management interfaces to Openstack. Following are the different management interfaces available.

  • Horizon web interface
  • CLI interface to each service. CLI interface is provided by Python script. Internally, the script calls the REST interface.
  • REST interface. This is accessible either through Curl or a POSTMAN kind of client.
  • Programmatic interface using Python SDK.

Horizon interface:

On the host where stacking is done, webserver runs on port 80 and all Openstack services can be configured using this interface. Login to Horizon can be done with either tenant userid or admin userid. Based on the userid, privileges are granted.

CLI interface:

CLI interface is provided for each service. Nova services are accessible through “nova” client, Swift services are accessible with “swift” client and so on. Following example lists running VMs. Continue reading Openstack Juno – Management interfaces →

Openstack Juno – Group based policy

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This blog is part of my series on Openstack Juno. In this blog, I will cover Group based policy in Openstack Juno. For more information on Group based policy(GBP), please refer to my earlier blogs on GBP basics and ODL integration.

Group based policy(GBP) support in Juno:

Preliminary support for GBP is available in Juno, more functionality will come in Kilo release. We need to pull a GBP label based devstack to get the GBP functionality. I followed the instructions in Openstack GBP wiki to try out GBP functionality with devstack. The exercise walks through a dummy application stack with 2 client groups and 1 web server group and having some policies between the 3 group application to control the interactions.

Following are some advantages that I realized as part of trying the exercise:

Continue reading Openstack Juno – Group based policy →

Openstack Juno – Multihost Networking

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This blog is part of my series on Openstack Juno.

In this blog, I will cover adding a compute host to the Openstack Devstack cluster and connect the 2 hosts using either vxlan or gre encapsulation.
Lets first do the stacking on the controller host using the steps mentioned in my previous blog.
Lets look at the hypervisor list. As expected, we see only 1 host.

$ nova hypervisor-list
+----+-------------------------+
| ID | Hypervisor hostname     |
+----+-------------------------+
| 1  | sreeubuntu14-VirtualBox |
+----+-------------------------+

Lets look at the networks created by default:

Continue reading Openstack Juno – Multihost Networking →

Openstack Juno services – Swift, Glance, Heat, Ceilometer

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This blog is part of my series on Openstack Juno. In this blog, I will cover the usage of Openstack services Swift, Glance, Heat, Ceilometer.

Swift:

Swift is used for Object based storage. Its similar to AWS S3 service.
First, create a container to store objects:

$ swift post mycont

Upload a file to the container

$ swift upload mycont local.conf

List container and objects.

$ swift list
mycont
$ swift list mycont
local.conf

List status of created container.

Continue reading Openstack Juno services – Swift, Glance, Heat, Ceilometer →

Openstack Juno services – Nova, Cinder

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This blog is part of my series on Openstack Juno. In this blog, I will cover the usage of Openstack services Nova, Cinder.

I found this blog on Openstack services good in giving a highlevel overview of services and comparing individual Openstack services with Amazon AWS services.

Nova basics:

Nova is the Openstack compute service.
Following command shows the flavors available by default. Flavors are different configurations(CPU, memory, hard disk) for the VMs that can be created from Nova.

Continue reading Openstack Juno services – Nova, Cinder →

Openstack Juno Install using Devstack

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Earlier, I had written 2 blogs on Openstack devstack Icehouse installation and networking. The feedback was positive on these blogs. This prompted me to do a series on different aspects of Openstack Juno. Openstack Juno is the 10th and latest release of Openstack that got released in October 2014. In the next series of blogs, I will cover the following aspects of Openstack Juno.

  • Openstack Juno devstack installation and debugging.
  • Accessing Openstack services through CLI, API and SDK.
  • Overview of different Openstack services along with a demo of their usage.
  • Multi-node devstack installation.

In this blog, I will cover the steps to install Openstack Juno in Devstack.

My environment:

  • Windows 7 with Virtualbox 4.3.20
  • 24 GB RAM (Devstack install per VM requires a minimum of 4GB)

Installation steps:

Continue reading Openstack Juno Install using Devstack →

Openstack Networking Demo

Cloud Platforms, Storage & Virtualization, ,

This blog covers a hands-on session demonstrating Openstack networking capabilities. This is a followup to my previous blog where I covered the Openstack Icehouse installation and basic usage. I have covered the following in the video.

  • Connectivity between VMs in a single subnet.
  • Connectivity between VMs across different subnets by having a router between the 2 subnets.
  • Connectivity between VMs across 2 different hosts and establish connectivity between the VMs using GRE tunnel between the 2 hosts.
  • Using Access security control policies to control access to VM.

VMs used are same as previous blog:

Controller localrc can be found here. Compute localrc can be found here. I had some issues getting connectivity across hosts working with network type vlan and vxlan. I am not clear if the issues are with the ovs switch version that I have or with the localrc configuration. Open vswitch version I am using is 1.4.6.

Continue reading Openstack Networking Demo →

Openstack Icehouse install using Devstack

Cloud Platforms, DevOps & Automation, ,

In this blog, I will cover steps to install Openstack Icehouse release using Devstack. I will cover Single node installation as well as Multi-node installation. In a single node installation, both control and compute instance runs in the same VM. In multi-node install, control and compute instance runs in 1 VM/host and a compute instance runs in another separate VM/host. In multi-node install, we can spin as many compute instances as needed. With 12GB RAM in my host, I was running out of memory with single control and compute instance and a bunch of host applications running in my system.

My environment:

  • Windows 7 with Virtualbox 4.3.10
  • 12 GB RAM

Downloadable VM:

I have created OVA files for both the controller and compute instance that can be downloaded from below links. Import the OVA files into any VM manager software like Virtualbox to try this out. These VMs are running Ubuntu 12.04.

Alternate locations for downloading VMs in case the Dropbox link above does not work:

Following are the steps that I did to create the VMs above. If you are downloading the OVA files, you don’t need to follow the steps below. Continue reading Openstack Icehouse install using Devstack →