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Managing your cloud resources with OpenStack: Difference between revisions
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Managing your cloud resources with OpenStack (view source)
Revision as of 19:02, 13 September 2016
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* <volume_name> can be found from the OpenStack dashboard by clicking on the volume name, and | * <volume_name> can be found from the OpenStack dashboard by clicking on the volume name, and | ||
* <image_name> is a name you choose for the image. | * <image_name> is a name you choose for the image. | ||
You can then download the image as described in [[OpenStack#Downloading an image into a local VirtualBox | Downloading an image into a local VirtualBox]]. | You can then download the image as described in [[OpenStack#Downloading an image into a local VirtualBox | Downloading an image into a local VirtualBox]]. It is best to detach the volume from the VM before you create an image from the volume. If the volume is a boot volume you will likely need to delete your VM to detach it, however, make sure you have not checked "Delete Volume on Instance Delete" when creating the VM. | ||
=Creating an Image From a VM= | |||
Using the [[command line interface]] issue the command | |||
{{Command| openstack server image create <server-name>}} | |||
where <code><server-name></code> should be replaced with the name of your server. The command only includes the VM's root drive (e.g. /dev/vda) in the image. This means that ephemeral drives and non-boot attached volumes are not included in the image and additional measures should be taken to preserve this data. In addition, a running VM which is writing to disk while the image is being created, may leave the file system in an inconsistent state. It is recommended that a VM be shutdown (not terminated) before an image is created from it. | |||
=Accessing a VM with Multiple Users= <!--T:28--> | =Accessing a VM with Multiple Users= <!--T:28--> | ||
[[File:VM multi user cloud init.png|400px|thumb| Cloud init to add multiple users (Click for larger image)]] | [[File:VM multi user cloud init.png|400px|thumb| Cloud init to add multiple users (Click for larger image)]] | ||
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Once this is done, users can log into the VM with their private keys as usual (see [[ssh keys]]). | Once this is done, users can log into the VM with their private keys as usual (see [[ssh keys]]). | ||
=Downloading an image | =Downloading an image= <!--T:38--> | ||
The first step is to install the OpenStack client and download the OpenStack RC file and source it (see [[OpenStack Command Line Clients]]). | The first step is to install the OpenStack client and download the OpenStack RC file and source it (see [[OpenStack Command Line Clients]]). | ||
The OpenStack client can list the available images on your OpenStack project with | The OpenStack client can list the available images on your OpenStack project with | ||
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where <format> matches that given in the table above for your selected image andthe last argument is the <code>ID</code> of the image you wish to download. | where <format> matches that given in the table above for your selected image andthe last argument is the <code>ID</code> of the image you wish to download. | ||
=Creating VirtualBox VM from a Cloud Image= | |||
<!--T:41--> | <!--T:41--> | ||
To use this image in VirtualBox you will need to convert the image in the qcow2 format to the vmdk format. This can be done with the <code>qemu-img</code> tool. This can be installed with something like | |||
{{Command|sudo apt-get install qemu-img}} | {{Command|sudo apt-get install qemu-img}} | ||
then do the conversion with | then do the conversion with | ||