Openstack 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
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:
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
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.
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=
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
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
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
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