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Questions tagged [openstack]

OpenStack is a collection of open source projects that enables an open, scalable cloud infrastructure. The core of OpenStack is meant to provide consistent APIs and interfaces to a variety of potential back-ends.

OpenStack is an open-source platform for building infrastructure-as-a-service (IaaS) clouds. It is implemented including several components, most notable being:

  • a Compute service (codenamed Nova) that has functionality similar to EC2 AWS (and implements an EC2-compatible API, as well as a separate OpenStack API)
  • an Object Storage service (codenamed Swift) that has functionality similar to EC2 S3.
  • An Image service (codenamed Glance) that manages virtual machine images used by the Compute service
  • An Identity service (codenamed Keystone) that manages user names and groups (known as tenants) across the OpenStack projects
  • A Dashboard service (codenamed Horizon) that provides a web interface.
  • A Network service (codenamed Neutron) that provides a set of components for makings SDN networking between VM's inside a project.

Official page

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Openstack: Is it possible to migrate an instance from a dead compute server to a live one?

I've got a cluster with 84 Openstack Essex compute nodes, one of which decided to pine for the fjords about 2 hours ago, with 8 running instances on it. The instances are all running off qcow2 disks on an NFS share, so the disk images are still…
cas
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What is the correct network configuration for a devStack VM (virtualbox)?

Usually when I setup a new Ubuntu VM, i keep the eth0 in NAT mode to get the internet & I add a eth1 interface in HostOnly mode so that I can ssh. But using this devStack guide : Running a Cloud in a VM, it looks like it tried to use eth0 as the…
Olivier
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How does OpenStack Glance work with Keystone and what exactly are these configuration options for?

I am configuring Glance to authenticate against Keystone. It works but I am unsure exactly how some of the authentication options interact. I started with the configuring glance documentation, but this doesn't actually document any of these…
larsks
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libvirtError that domain already exists, but virsh list doesn't show it

When I try to launch an instance with OpenStack, I get the following error in nova-compute.log: (nova.rpc): TRACE: libvirtError: operation failed: domain 'instance-0000000a' already exists with uuid 5f81a7d2-1b0f-8c72-4e1e-377c275e9289 However,…
Lorin Hochstein
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Migration between OpenStack and RackSpace cloud

So I am deploying a OpenStack private cloud in my business. As I understand from research the OpenStack project was created by RackSpace and that their own cloud platform uses OpenStack. So my question is would it be possible to migrate or move…
David Maitland
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Do prometheus metrics have some sort of "freshness" lifetime?

I'm scraping some metrics (openstack cinder volume sizes) every 15 minutes, and the results produce a discontinuous graph, like this: (That's the result of the simple query cinder_volume_size_gb). The metrics "exist" for about five minutes, but…
larsks
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Exhausted all hosts available for retrying build failures for instance

Trying to make a proof of concept cloud by following this guide https://www.rdoproject.org/install/packstack/ I managed to get OpenStack installed and I'm able to access the dashboard. When I go to make an instance, I get an error. Error: Failed to…
sfxworks
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Permission denied error when launching instance ("Could not open backing file")

Working with OpenStack, installed from packages available on Debian testing (buster). When I try to launch an instance, it fails after building with this message in nova-compute.log: Could not open backing file: Could not open…
d3query
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Openstack redundant architecture on three servers

I would like to deploy an Openstack architecture on three (super)servers in a way that if one of server is down the Openstack infrastructure is still functionning. What is the best way to deploy this ? Is deploying Control, Network and Compute…
SwissFr
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Traffic via static route on router does not find its way back

this one bugs me for a couple of days now and I cannot find a solution. Sorry for the strange title. This isn't my main field of work and I currently cannot think of a better title. Some facts: I'm a user on a shared openstack environment I cannot…
malte
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OpenVSwitch with Libvirt

Here's my situation: I'm running CentOS 7 with Openvswitch and Libvirt/Qemu. My domains are configured to use the virtualport type openvswitch, so when I start a VM it creates a port in the ovs bridge. Nothing too complicated. My problem is if I…
user165222
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How to make a linux VM working as a router

I have access to an openstack account where I can create Linux 14.04 VMs. I have created two network interfaces. "public-net" which is connected to the internet through a router "private-net" which is not exposed the internet Now, I have created…
psaha4
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How cleanup openstack orphan stuff and manage trash?

We start use Openstack some months ago, and realize that delete projects does not delete project content! we periodically create projects for users groups and delete when are not needed anymore, but there are orphan vms, keypairs and other stuff…
martinkenneth
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HTTP failure within Docker container hosted in OpenStack

I've currently got Docker running on a couple of OpenStack-hosted VMs. When attempting to make HTTP requests from within containers on those machines, the request almost invariably hangs waiting for a response. When making HTTPS requests, the…
Mac
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How to restore a guest Windows 2012 R2 VM installation/backup from VMWare to OpenStack?

I have a VMWare VM with Windows 2012 R2 installed in DC#1. The machine has terminal services set up with user accounts and permissions, lots of software installed and bunch of things configured that would probably take me many hours or even days to…
Mihail Russu
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