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Does devstack completely install openstack? I read somewhere that devStack is not and has never been intended to be a general OpenStack installer. So what does devstack actually install? Is there any other scripted method available to completely install openstack(grizzly release) or I need to follow the manual installation steps given on openstack website?
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DevStack is, in many ways, the OKD (formerly Minishift) or Minikube of OpenStack. It's designed for development and testing, and while it's very flexible in what it lets you do, it's also not meant for production use. DevStack can help you understand the many OpenStack components and how to customize them.
First, to install OpenStack user needs a Linux machine. It can be either a virtual machine (VM) on a regular PC or a separate one.
OpenStack is an open-source cloud platform that manages distributed compute, network and storage resources, aggregates them into pools, and allows on-demand provisioning of virtual resources through a self-service portal.
devstack does completely install from git openstack.
for lesser values of completely anyways. devstack is the version of openstack used in jenkins gate testing by developers committing code to the openstack project.
devstack as the name suggests is specifically for developing for openstack. as such it's existence is ephemeral. in short, after running stack.sh the resulting ( probably ) functioning openstack is setup... but upon reboot it will not come back up. there are no upstart or systemd or init.d scripts for restarting services. there is no high availability, no backups, no configuration management. And following the latest git releases in the development branch of openstack can be a great way to discover just how unstable openstack is before a feature freeze.
there are several vagrant recipes in the world for deploying openstack, and openstack-puppet is a puppet recipe for deploying openstack. chef also maintains an openstack recipe as well.
Grizzly is a bit old now. Havana is the current stable release.
https://github.com/stackforge/puppet-openstack http://docs.opscode.com/openstack.html http://cloudarchitectmusings.com/2013/12/01/deploy-openstack-havana-on-your-laptop-using-vagrant-and-chef/
and ubuntu even maintains a system called maas and juju for deploying openstack super quickly on their OS.
https://help.ubuntu.com/community/UbuntuCloudInfrastructure http://www.youtube.com/watch?v=mspwQfoYQks
so lots of ways to install openstack.
however most folks pushing a production cloud use some form of configuration management system. that way they can deploy compute nodes automatically. and recover systems quickly.
also check out openstack on openstack.
https://wiki.openstack.org/wiki/TripleO
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