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{{{#!wiki caution '''This is a beta service''' Please note that we are currently deploying the Cloud infrastructure at IFCA, so work is still in progress. If you find any error, please open a ticket on the helpdesk. }}} |
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| 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. | IFCA uses [[https://openstack.org|OpenStack]] (Havana version) for managing the cloud service. You may get access upon [[https://support.ifca.es/rt/Ticket/Create.html?Queue=3&Subject=New Cloud Account|request]]. There are several ways to access the infrastructure, namely: |
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| We highly recommend to check this document frequently, since changes in the documentation may occur. | * [[http://portal.cloud.ifca.es|Horizon Web dashboard]] * [[http://api.openstack.org/|OpenStack API]], that can be used with the `nova` command line interface. * [[http://occi-wg.org/|OCCI API]], that can be used with [[https://github.com/gwdg/rOCCI-cli|rOCCI client]] |
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| Managing the cloud is made from the [[Cluster/Usage|GRIDUI Cluster]]. Ensure that you have the credentials properly installed by issuing the following command and checking that it returns something: | This documents focuses on the usage of the `nova` command. This and the web dashboard are the recommended client tools to use with our infrastructure. |
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| {{{ $ echo $NOVA_API_KEY |
== Documentation == The official, up to date documentation can be found in the following link: * http://docs.openstack.org/user-guide/content/ Plase refer to that documentation, since it contains the most up to date and accurate documentation for using OpenStack resources. {{{#!wiki caution Important: Do not hesitate in [[https://support.ifca.es/rt/Ticket/Create.html?Queue=3 | opening a ticket]] if you notice problems using cloud services. |
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It should return a string. If you do not see anything, please [[http://support.ifca.es|open an incidence]]. == Create a machine == To create a machine you have to perform several steps: * Decide which of the pre-built 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 === ==== Image 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, write down its identifier (ami-XXXXXXXX). ==== Instance types ==== You can choose the size of your machine (i.e. how many CPUs and how much memory) from the following instance types: ===== Standard machines ===== || '''Name''' || '''Memory''' || '''# CPU''' || '''Local storage''' || '''Swap''' || || m1.tiny || 512MB || 1 || 0GB || 0GB|| || m1.small || 2048MB || 1 || 20GB || 0GB|| || m1.medium || 4096MB || 2 || 40GB || 0GB|| || m1.large || 8192MB || 4 || 80GB || 0GB|| || m1.xlarge || 16384MB || 8 || 160GB || 0GB|| ===== High-memory machines ===== || '''Name''' || '''Memory''' || '''# CPU''' || '''Local storage''' || '''Swap''' || || m2.8g || 8192MG || 1 || 10GB || 0GB|| === 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 === === Authorize SSH connections and ping === If you decide not to use a VPN, but connect to your machines trough the GRIDUI cluster, you have to authorize such connections with: {{{ $ euca-authorize -P tcp -p 22 default $ euca-authorize -P icmp -t -1:-1 default }}} ==== SSH Connection ==== 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 }}} == Using Cloud Storage == The storage in the cloud use volumes. Volumes are raw block devices that can be created dynamically with a desired size and associated with cloud images to be used as data disk. After use the data in the volume you can detach from the image and save for a later use of the persisted data. === Creating a Volume === To create a volume you have to run `euca-create-volume` command. For instance, to create a volume that is 100GB in size: {{{ $ euca-create-volume -s 100 -z nova VOLUME vol-00000001 10 creating 2015-11-29 }}} === Using a Volume in an instance === You may attach block volumes to instances using `euca-attach-volume`. You will need to specify the local block device name (this will be used inside the instance) and the identified instance. Currently the devices to attach the volume should be `/dev/xvdc`, `/dev/xvdd`,... `/dev/xvdz`. Attaching volume `vol-00000001` to `image i-00000001` in device /dev/xvdc si done with: {{{ $ euca-attach-volume -i i-00000001 -d /dev/xvdc vol-00000001 }}} You can see the volume attached to the image with the command `euca-describe-volumes`. {{{ $ euca-describe-volumes VOLUME vol-00000001 100 nova in-use 2015-11-29 ATTACHMENT vol-0000000c i-00000051 /dev/xvdc }}} You can then use the new volume inside your running instance. As an example, the usage of the volume as an `ext4` filesystem in a Ubuntu image is described below. 1. log into the image and check that the device is visible (as either `root` or as `ubuntu` user and use `sudo` for commands): . {{{ server-1 $ sudo fdisk -l | grep Disk Disk /dev/xvda doesn't contain a valid partition table Disk /dev/xvdb doesn't contain a valid partition table Disk /dev/xvdc doesn't contain a valid partition table Disk /dev/xvda: 10.7 GB, 10737418240 bytes Disk identifier: 0x00000000 Disk /dev/xvdb: 21.5 GB, 21474836480 bytes Disk identifier: 0x00000000 Disk /dev/xvdc: 107.4 GB, 107374182400 bytes Disk identifier: 0x00000000 }}} 1. Create a single ext4 partition on the device, an mount in the /srv mount point (-o sync is safe in case of image crashs): . {{{ server-1 $ sudo mkfs.ext4 /dev/xvdc (...) server-1 $ sudo mount -t ext4 -o sync /dev/xvdc /srv }}} 1. Check that the volume is visible as a mounted filesystem: . {{{ server-1 $ df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda 9.9G 622M 8.8G 7% / none 996M 144K 995M 1% /dev none 1001M 0 1001M 0% /dev/shm none 1001M 48K 1001M 1% /var/run none 1001M 0 1001M 0% /var/lock none 1001M 0 1001M 0% /lib/init/rw /dev/xvdb 20G 173M 19G 1% /mnt /dev/xvdc 99G 188M 94G 1% /srv }}} After you are done with the volume yo can detach from image with (you should `umount` it first on your instance): {{{ $ euca-detach-volume vol-00000001 }}} You must detach a volume before terminating an instance or deleting a volume. If you fail to detach a volume, it may leave the volume in an inconsistent state and you risk losing data. === Reusing an Old Volume === Attach with the new image: {{{ $ euca-attach-volume -i i-00000002 -d /dev/xvdc vol-00000001 }}} Because the filesystem is already created on the volume, you only need to mount it to access: {{{ server-1 $ sudo mount -t ext4 -o sync /dev/xvdc /srv }}} After you are done with the volume yo can detach from image: {{{ $ euca-detach-volume vol-00000001 }}} === Other uses of Volumes === With volume you can create snapshots of the data, recover it, delete volumes,...etc. More on volumes [[http://open.eucalyptus.com/wiki/Euca2oolsStorage]] == Advanced topics == === Attach to the project's VPN === Each project has a VPN assigned to it. You can attach any computer to it, thus having it connected to your project's internal network. So as to do so, you have to perform several steps (instructions only for GNU/Linux): 1. Copy your `~.cloud` to the machine that you want to attach to your project's VPN. 1. Install [[https://www.openvpn.net/|OpenVPN]] on that machine. 1. Launch openvpn with the `nova-vpn.conf` configuration file. {{{ # cd cloud_credentials # openvpn --config nova-vpn.conf }}} Please note that there are several paths in the `nova-vpn.conf` configuration file that are relative to the directory in which it is located. Should you wish to use different/separated paths, please edit `nova-vpn.conf` and adjust the `cert`, `key` and `ca` parameters. MacOS users may use [[http://code.google.com/p/tunnelblick/| Tunnelblick]] (a GUI interface to OpenVPN) that can use the `nova-vpn.conf` and certificate files without any changes. # === Manage multiple credentials === # and checking that `NOVA_API`, `NOVA_CERT`, `NOVA_PROJECT`, `NOVA_URL`, `NOVA_USERNAME`, |
Cloud Computing at IFCA
Contents
1. Introduction
IFCA uses OpenStack (Havana version) for managing the cloud service. You may get access upon request. There are several ways to access the infrastructure, namely:
OpenStack API, that can be used with the nova command line interface.
OCCI API, that can be used with rOCCI client
This documents focuses on the usage of the nova command. This and the web dashboard are the recommended client tools to use with our infrastructure.
2. Documentation
The official, up to date documentation can be found in the following link:
Plase refer to that documentation, since it contains the most up to date and accurate documentation for using OpenStack resources.
Important: Do not hesitate in opening a ticket if you notice problems using cloud services.