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How L3 and DHCP agents HA work in Red Hat OSP7

In Red Hat Openstack Platform 7, l3-agent and dhcp-agents are running in active-active on each controller node, instead of active-standby in OSP6. [[email protected] ~]# pcs status | grep 'l3-agent\|dhcp-agent' -A1 Clone Set: neutron-l3-agent-clone

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Cinder

NFS backend for Openstack Glance/Cinder/Instance-store

In this post, let’s go through how to configure NFS as unified storage backend for Openstack Glance, Cinder and shared instance-store, also we look at how it works under the hood. Setup:

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Ditributed

Building redundant and distributed L3 network in Juno

Before Juno, when we deploy Openstack in production, there always is a painful point about L3 Agent:   High availability and performance bottleneck. Now Juno comes with new Neutron features to provide HA L3-agent

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cloud-init

How to inject file/meta/ssh key/root password/userdata/config drive to a VM during nova boot

There are possibilities to inject something into the VM during nova boot, let’s go through them one by one: The test above is done on Openstack Havana 2012.2.1 @CentOS 6.

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diskless

Create PXE-Boot image for Openstack

Openstack doesn’t support launching a diskless PXE-boot VM, we have to make an image with PXE-boot capability to achieve this. 1.Create a small empty disk file, create dos filesystem. dd if=

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availability zone

Openstack Zoning - Region/Availability Zone/Host Aggregate

Openstack cloud can be zoned from top to down levels, into Regions, Availability Zones and Host Aggregates -Region Each Region has its own full Openstack deployment, including its own API endpoints, networks and

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block

Openstack VM live migration

This post is based assumption that KVM as hypervisor, and Openstack is running in Grizzly on top of RHEL6.4 Openstack VM live migration can have 3 categories: Block live migration without shared

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HA

Openstack Heat try-out

What’s Heat ? Heat is a service to orchestrate multiple composite cloud applications using the AWS CloudFormation template format, it’s Openstack’s implementation of CloudFormation and CloudWatch. Heat integrates other core components

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Network

Openstack Quantum supported network topologies

Quantum support very flexible network topologies, this section we talk about several typical modes. 1. No L3-agent, physical network takes L3 function directly For this kind of network, we only need to create

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