This is a text-only version of the following page on https://raymii.org: --- Title : Openstack Glance Image Download, download Openstack images Author : Remy van Elst Date : 25-02-2015 URL : https://raymii.org/s/tutorials/Openstack_Glance_Image_Download.html Format : Markdown/HTML --- This guide shows you how download Openstack Images to your local machine using the command line Glance client. You can use this, for example, to download a copy of an image created from a VM, or to download the images your Openstack provider provides and adapt those. You can see all my [Openstack related articles here][1]. For example, how to use [Duplicity to create Encrypted backups to the Openstack Swift Object Store][2]

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### Command Line tools Make sure you have the Openstack command line tools installed. Follow the official openstack guide [here][4]. If you have `pip` installed you can use that to install the tools: pip install python-novaclient pip install python-cinderclient pip install python-glanceclient pip install python-keystoneclient pip install python-neutronclient pip install python-swiftclient Save yourself some time and create a file named `computerc` with the below contents: export OS_AUTH_URL="https://identity.stack.cloudvps.com/v2.0" export OS_TENANT_NAME="" export OS_USERNAME="" export OS_PASSWORD="" export OS_TENANT_ID="" When you are going to do stuff with the Openstack command line clients, load this file: source computerc That way, your authentication data are loaded and you don't have to give parameters like `--os-username` and such. ### Openstack Overview Openstack is a datacenter virtualization plaform consisting out of many different tools and services. Here is a short overview of the different services you might encounter. #### Compute (Nova) This is the virtualization service. It works with a hypervisor to create and manage virtual machines. You can create a VM based on a specific "Flavour", which is just a definition of specs like disk, cpu and ram. #### Block Storage (Cinder) This is the service which makes block devices (volumes) available to services. A flavour can not be changed, just resized. If you want extra storage you need to create a volume, attach it to the VM and mount it there for use. #### Images (Glance) This is the service which holds all the images. Images can be used to boot a VM from. Images can be prepared with tools like `cloud-init` to make them behave better in a cloud environment, for example, setting an SSH key or password at boot. ### Listing images When you've created a `computerc` file and loaded it up in your shell you can start the process. You need the UUID of the image you want to download. Get a list of all images using the `glance image-list` command: $ glance image-list Output: +------------+---------------------+--------+-----------+------------+--------+ | ID | Name | Disk | Container | Size | Status | +------------+---------------------+--------+-----------+------------+--------+ | 0a[...]5dd | example-test | raw | bare | 4843700224 | active | | 13[...]b30 | example-2 | qcow2 | bare | 4762632192 | active | | 22[...]eeb | FreeBSD-10.1 | qcow2 | bare | 736981504 | active | | d2[...]625 | pfSense 2.1.5 | iso | bare | 403243008 | active | +------------+---------------------+--------+-----------+------------+--------+ The `ID` part is what you need. In this example it is trimmed. ### Download Image Use the `glance image-download` command to download the image. By default it will go to STDOUT, use the `--file` parameter to place the output in a file. $ glance image-download --file ./example-test.img 0a[...]5dd The command syntax is: $ glance image-download --file $FILENAME $UUID If you get the following error: object of type 'generator' has no len() Try executing the command without the `--progress` option. [1]: https://raymii.org/s/tags/openstack.html [2]: https://raymii.org/s/tutorials/Encrypted_Duplicity_Backups_to_Openstack_Swift_Objectstore.html [3]: https://www.digitalocean.com/?refcode=7435ae6b8212 [4]: http://docs.openstack.org/user-guide/content/install_clients.html --- License: All the text on this website is free as in freedom unless stated otherwise. 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