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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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675 questions
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Are DNAT and REDIRECT equivalent when applied to locally destined traffic?

In setting up our OpenStack environment, I ran into a problem that was preventing instances from contacting a server running on the host. The metadata service (which exposes an HTTP API) runs on port 8775 on the host, and the OpenStack networking…
larsks
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Syncing / backup from S3 buckets to openstack swift containers

I need to backup/sync few hundred GB of files in S3 buckets to openstack swift containers. I have thousands of files in several S3 buckets I want to copy/sync over openstack swift containers but I don't want to copy them over on the disk server then…
ict4ngo
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How to attach an interface to an instance with the openstack client?

According to the OpenStack docs the individual clients are deprecated in favor for the openstack client. The following individual clients are deprecated in favor of a common client. (source) So I started using the openstack client. With the nova…
Robin
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QCOW2 virtual size lowering

I'm trying to get the virtual size of a qcow2 container down so that it can fit in a openstack flavor with 10GB disk. root@node-10:~# qemu-img info zztop.qcow image: zztop.qcow file format: qcow2 virtual size: 80G (85899345920 bytes) disk size:…
Duncan Fairley
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Openstack: What the difference between nova migrate and nova evacuate?

On liberty, I've been searching for a way to "empty" a hypervisor from all its VMs. At the nova client docs, I've found the following commands related to this: nova evacuate : Evacuate server from failed host. nova migrate : Migrate a server. The…
gekaklam
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Promiscuous mode in KVM

I have cloud system based on Openstack Icehouse-version. Now I want to test newer version of Openstack (Juno) inside my existing cloud. All hosts and guests use Ubuntu 14.04 as their OS. KVM is hypervisor I am using. So I created virtual machines on…
Madoc Comadrin
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OpenStack - assign security group to existing instance

I want to assign a security group to an existing instance. Is this possible?
Alex
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Erase GPU memory

We have Nvidia GPU cards that can be used by different users in an OpenStack environment. A first user creates a VM with access to a GPU card, then deletes the VM when done. Another user then creates a VM which is given access to the same card.…
J. Chorin
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Windows port forwarding, local machine to server

I'm working on Windows 8. I'm trying to connect to an OpenStack cloud which is hosted on a remote server but has a public IP to the API. However, making API calls require calls to additional services inside the cloud which still have the internal…
little.toblerone
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Is it possible to monitor how OpenStack is allocating virtual infrastructure on a physical one?

I've been wondering whether there's a tool for monitoring how OpenStack is using physical resources (cluster [cpus, ram], network [interfaces, switches]) for its virtual infrastructures? The virtual infrastructures are visible in Horizon, however…
Michal
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Extremely slow qemu storage performance with qcow2 images

I'm running some images using libvirt on a small Openstack cluster. Storage performance on these machines is extremely poor: my monitoring tool shows 100% utilisation (usually on writes but sometimes on reads) with throughputs as low as ~50KB/s - up…
Cera
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Automating Configuration of VMware's vSwitch (OpenStack/libvirt/Nova)

There's a lot of talk now about VMware integrating with OpenStack now. I've noticed that Nova network service is working with VMware's standard and vDS. Deploying a full OpenStack instance is not currently viable in our environment, but we would…
cheesesticksricepuck
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Is OpenStack live migration possible without shared storage?

Like many people I am considering creating 'private cloud' using either OpenStack or VMware. VMware vMotion has a nice feature which allows Live Migration of VMs even without shared storage. I have tried this feature in a lab environment and it…
Stefan Lasiewski
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Deploying Openstack without internet access

I have about a dozen rather beefy machines on a separate network. This network is not (will not be, cannot be) connected to the internet. I'd like to deploy Openstack on them so that they can be used as a sort of internal cloud hosting solution.…
user181241
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Cannot connect to Openstack Instance via horizon, but SSH works?

I've got an OpenStack deployment running inside a VM for testing purposes. My setup is as follows: Host Ubuntu x64 with Virtualbox -> Guest Ubuntu x64 with OpenStack -> Ubuntu X64 Server Test Instances through Openstack. I realize it is of no…
user991710
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