MetaCloud testbed - workflow example

Z MetaCentrum
Přejít na: navigace, hledání

THIS PART OF WIKI IS OUTDATED AND UNDER CONSTRUCTION. PLEASE BE PATIENT.

(Czech version) For better understanding of how to work with cloud, we prepared a simple use case for you, where we will illustrate the basic functionality of MetaCloud.

Web interface usage example

The easiest way is to use one of the templates and images we prepared for you. You can find their lists in the Virtual Resources section in the left menu within the section Templates and Images. Choose the template you want to start and click on the Initiate button in the top right menu.Now, you can connect via ssh to your virtual machine which address you can find in column VM's IP(s). All our virtual machines' images are non-persistent. That means all data stored on the virtual machine are lost after its shutdown. If you need a virtual machine which keep data aftre its shutdown you have to upload your own image to MetaCloud [[upload image or copy one of our images. You can do that in images section by clicking on the Clone button in the top right menu. Now you can set your image to persistent in Persistent column. Don't forget that your new image has different ID (ID column) so you have to support it with right template. You can create a new one or you can copy and modify one of our prepared templates. Again you can choose the template from the list and click on Clone button in the top right menu. Click on the Update properties button and you will be shown a dialogue with templates properties. Find the row IMAGE_ID and set to the ID of your new image. Now when you start the virtual machine with your peristent image all chages and data will be stored aftre the machine shutdown. You can start only one virtual machine with persistent image. If you need more virtual machines with this modified image, change the image back to non-persistent and than you can run more of them.

List of available images
List of available templates
Copy image
Copy and modify template

Command line usage example

We suppose you have correctly configured and functioning environment with OpenNebula client tools. The easiest way is to use one of the templates and images we prepared for you.

$ oneimage list
 ID USER       GROUP      NAME            DATASTORE     SIZE TYPE PER STAT RVMS
  8 oneadmin   users      debian6         default         8G OS    No rdy     0
 41 oneadmin   users      scilinux5       default        10G OS    No rdy     0
 42 oneadmin   users      scilinux6       default        10G OS    No rdy     0
$ onetemplate list
  ID USER            GROUP       NAME                    REGTIME
  5 oneadmin         users       debianvm         02/15 18:27:09
 55 oneadmin         users       scilinux5vm      04/24 13:04:17
 56 oneadmin         users       scilinux6vm      04/24 13:05:04

Now you can start a virtual machine.

$ onetemplate instantiate 5
 VM ID: 1977

When the machine is running you can establish a connection via ssh.

$ onevm show 1977
 VIRTUAL MACHINE 1977 INFORMATION 
 -----------------------------
 ...
 NIC=[
   BRIDGE=xenbr0,
   CLUSTER_ID="100",
   IP=<IP_ADRESA_VM>,               # address for SSH connction with VM
   MAC=02:00:c0:a8:fe:03,
   NETWORK=public,
   NETWORK_ID="1",
   VLAN="NO",
   WHITE_PORTS_TCP="22",
   WHITE_PORTS_UDP="67,68" ]
 ...

All our virtual machines' images are non-persistent. That means all data stored on the virtual machine are lost after its shutdown. If you need a virtual machine keep data aftre its shutdown you have to upload your own image to MetaCloud [[upload image or copy one of our images.

$ oneimage clone debian6 MyImage
 ID: 371

Now you can set image persistence.

$ oneimage persistent 371

Don't forget that your new image has different ID (ID column) so you have to support it with right template. You can create a new one or you can copy and modify one of our prepared templates.

$ onetemplate clone debianvm MyTemplate
 ID: 584
$ onetemplate update 584

Find the row IMAGE_ID and set to the ID of your new image. Now when you start the virtual machine with your peristent image all chages and data will be stored aftre the machine shutdown. You can start only one virtual machine with persistent image. If you need more virtual machines with this modified image, change the image back to non-persistent and than you can run more of them.