Cloud Computing at IFCA

Introduction

This is a beta service, since the deployment and development is ongoing. However, to test the functionality, access to the infrastructure can be granted to certain users.

We highly recommend to check this document frequently, since changes in the documentation may occur.

Start working with the cloud

Managing the cloud is made from the GRIDUI Cluster. Ensure that you have the credentials properly installed by issuing the following command and checking that it returns something:

$ echo $NOVA_API_KEY

Creating a machine

To create a machine you have to perform several steps:

• Decide which of the prebuilt images you are going to use.
• Decide which with of the available sizes is suitable for you.
• Decide (and create if not ready) with keypair should be used to connect to the machine.

Image and size selection

There are several pre-built images available. To check them, use the euca-describe-images command:

$ euca-describe-images 
IMAGE   ami-00000008    None (cloudpipe)                available       public                  machine                 instance-store
IMAGE   ami-00000007    None (Debian Wheezy (2011-08))          available       public                  machine                 instance-store
IMAGE   ami-00000006    None (lucid-server-uec-amd64.img)               available       public                  machine                 instance-store
IMAGE   ami-00000003    None (Scientific Linux 5.5)             available       public                  machine                 instance-store
IMAGE   ami-00000001    None (Scientific Linux 5.5)             available       public                  machine                 instance-store

Once you have decided with image to use, you can write down its identifier (ami-XXXXXXXX). You also have to decide with image size to use from the following:

Create SSH credentials

For most of the users this is a one-time step (although you can create as much SSH credentials as you want). You have to create an SSH-keypair so as to inject it to the newly created machine with the following command (it will create a keypair named cloudkey and store it under ~/.cloud/cloudkey.pem):

$ euca-add-keypair cloudkey > ~/.cloud/cloudkey.pem

Make sure that you keep safe the file ~/.cloud/cloudkey.pem, since it will contain the private key needed to access your cloud machines. You can check the name later with the euca-describe-keypairs command.

Launching the instance

To launch the instance, you have to issue euca-run-instances, specifying:

• wich keypair to use (in the example cloudkey).

• wich size should be used (in the example m1.tiny).

• with image should be used (in the example ami-00000001).

$ euca-run-instances -k cloudkey -t m1.tiny ami-00000001
RESERVATION     r-1zdwog0m      ACES    default
INSTANCE        i-00000048      ami-00000001                    scheduling      cloudkey (ACES, None)   2011-09-02T12:19:41Z    None    None

You can check its status with euca-describe-instances

$ euca-describe-instances i-00000048
RESERVATION     r-vmfu1xq2      ACES    default
INSTANCE        i-00000048      ami-00000001    172.16.1.8      172.16.1.8      blocked         cloudkey (ACES, cloud01)        0       m1.tiny         2011-09-02T12:15:32Z    nova

Connect to the server

You have to use the private identify file that you created before (~/.cloud/cloudkey.pem) and pass it to the SSH client. To check the IP to with you should connect, check it with euca-describe-instances

$ ssh -i ~/.cloud/cloudkey.pem root@172.16.1.8

Stopping the server

Images can be stopped with euca-terminate-instances

$ euca-terminate-instances i-00000048

Advanced topics

Attach to the project's VPN

Manage multiple credentials

• and checking that NOVA_API, NOVA_CERT, NOVA_PROJECT, NOVA_URL, NOVA_USERNAME,