Difference between revisions of "Fedcloud-tf:CLI Environment"

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(List the contents of the CDMI storage)
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  $ ./bcdmi -e http://prisma-swift.ba.infn.it:8080/ stat
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  $ ./bcdmi -e http://prisma-swift.ba.infn.it:8080/ stat
 
  {
 
  {
 
   "objectName": "AUTH_113d9a9a671944648722e890ecb94d36/",
 
   "objectName": "AUTH_113d9a9a671944648722e890ecb94d36/",

Revision as of 14:32, 4 August 2014

Main Roadmap and Innovation Technology For Users For Resource Providers Media



This guide provides the information on how to setup a FedCloud command-line environment (using the Ruby OCCI Framework)

Setting up a command line structure basically consists of the following phases:

  1. Security setup
  2. Set up (r)OCCI tools
  3. Test

Requirements

This guide has been tested on the following systems (64 bits):

  • RedHat 6.x (x86_64)
  • Scientific Linux 6.x (x86_64)
  • CentOS 6.x (x86_64)
  • Mac OS X > 10.6
  • Debian >= 6 (amd64)
  • Ubuntu 12.04 (amd64)

NOTE: 32 bits OSes are not supported

Security setup

This section is the most fragile bit of the setup. It consists of setting up the following components:

  1. Obtain a Grid user certificate
  2. Configure the certificate based trust anchors
  3. Join the FedCloud Virtual Organisation
  4. Install VO client tools
  5. Configure VO membership information

Obtain a Grid user certificate

This step is fairly straight-forward in terms of processes. The goal is to obtain a digital certificate that is signed by a given certification authority, vouching for the validity of your real life identity encoded into the digital certificate issued to you.

Although each Certification Authority (including their affiliated Registration Authorities) follow individual procedures, you will eventually end up with a personal digital Grid certificate. More information on how to obtain a Grid certificate is available on the EGI website.

In any way, you now have (a) a digital certificate, and (b) a private key. Certificates use a cryptography technology called public key cryptography. Without going too much into details, the public key is contained in your certificate, and can be used and obtained by everyone on the Internet (including Grids and Clouds). It is safe to publish the public key (that's why it is called "public key"). There is exactly one pendant complementing the public key, and that is the private key. You must keep this private key safe at all circumstances, as it is the only token with which you can ensure that the identity stored in your certificate is you. Anyone who possesses the private key can claim your identity!

However, once you have obtained your certificate (during the Grid certificate enrollment process, your computer has generated the public and the private key), you will have those two digital files. To conclude the first step of setting up your security environment, you need to ensure that both are safely stored in your home directory as follows:

$ ls -al ~/.globus
total 48
drwxr-xr-x    14 michel  staff    476 Mar  7 13:57 .
drwxr-xr-x+   73 michel  staff   2482 Apr  3 11:41 ..
-rw-r--r--     1 michel  staff   1765 Feb  5 20:07 usercert.pem
-r--------     1 michel  staff   1751 Feb  5 20:07 userkey.pem
-r--------     1 michel  staff   1751 Feb  5 20:07 usercred.pem
-rw-r--r--     1 michel  staff   3254 Oct 20  2011 userrequest.pem

Notes:

  1. File userkey.pem is your encoded and encrypted private key - you can access it only with a password that you have used during enrolling for a certificate.
  2. File userkey.pem must have the shown permissions, i.e. that only the current user can read its contents, and nothing else. Other tools will depend on this setting.
  3. File usercert.pem contains your user certificate (with the public key). Note the different permissions on this file compared to userkey.pem.
  4. File usercred.pem contains your user certificate with the private and public key. To create it, you can execute the command " cat ~/.globus/usercert.pem ~/.globus/userkey.pem > ~/.globus/usercred.pem ". Note that this file shall have the same permissions as the userkey.pem.
  5. The directories shown in the listing contain archived previous versions of my own certificate (I maintain a Grid certificate for a number of years in the meantime).

If your system is set up this way, then the Grid certificate enrollment step is concluded.

Configure the certificate based trust anchors

The tools you are going to use will need to know which Certification Authorities you trust. For sure you will want to trust the CA that issued your own Grid certificate, but that is not enough. A number of services run in the EGI infrastructure use certificates issued by different CAs, and in order to access these services, you will have to trust those CAs as well. This act of establishing trust in s CA is represented in your system by making the CA's certificate available to your tools. In a nutshell, if your tool can through some algorithms establish the fact that a given CA certificate was used to issue another certificate that is about to be verified, then the verified certificate is said to be trusted.

EGI adopts the list of endorsed Certificate Authorities that is maintained by the EUGridPMA initiative. This list is made available in the EGI Software Repository and is updated regularly. So, what is left to you is to

  • Obtain these certificates, and
  • install them into a default location

This is, again, different for different platforms that you may use. EGI directly supports Scientific Linux5 SL6 and Debian6 with a repository service available in the EGI Software Repository.

The paragraphs below will give a quick demo on how to install the Grid CA certificates on the most widely used operating systems

Debian >= 6 and Ubuntu 12.04

Follow the EGI UMD repository installation guide

Install the Grid certificates via

apt-get update
apt-get install ca-policy-egi-core
RedHat Linux 6 and Scientific Linux 6

Follow the EGI UMD repository installation guide

Install the Grid certificates via

yum install lcg-CA
Linux Generic and Mac OS X

Browse to the CA trust anchor's TGZ directory at http://repository.egi.eu/sw/production/cas/1/current/tgz/ and download all the certificate archives.( TODO - Add a simple script to automate that.)

Unpack all individual certificate archive into the same temporary directory. (TODO - provide a simple script for that.) Each certificate archive should expand into five individual files, plus a number of symbolic links to these, for example:

  44 Jan 21 11:00 ca_KEK-1.52.tar.gz 
   7 Feb  1 13:55 2f2f573f.0 -> KEK.pem
  14 Feb  1 13:55 2f2f573f.namespaces -> KEK.namespaces
  18 Feb  1 13:55 2f2f573f.signing_policy -> KEK.signing_policy
   7 Feb  1 13:55 617ff41b.0 -> KEK.pem
  14 Feb  1 13:55 617ff41b.namespaces -> KEK.namespaces
  18 Feb  1 13:55 617ff41b.signing_policy -> KEK.signing_policy
  44 Jan 21 11:00 KEK.crl_url
 239 Jan 21 11:00 KEK.info
 464 Jan 21 11:00 KEK.namespaces
1273 Jan 21 11:00 KEK.pem
1299 Jan 21 11:00 KEK.signing_policy

Once completed, you need to make this directory available to your tools.

The agreed default location for these CA certificates is /etc/grid-security/certificates. It is possible to store the certificates in a different location, but that would require much of configuration hassle. So:

# sudo cp your_temporary_ca_dir /etc/grid-security/certificates

with your_temporary_ca_dir being the directory into which you have extracted the individual CA certificate archives in the previous step.


Install the fetch-crl utility

The fetch-crl utility will retrieve certificate revocation lists (CRLs) for a set of installed trust anchors.

Debian >= 6 and Ubuntu 12.04
apt-get install fetch-crl
RedHat Linux 6 and Scientific Linux 6
yum install fetch-crl
chkconfig fetch-crl on

Join the Virtual Organisation

In EGI, one need to be a member of a Virtual Organisation (VO) to be able to access EGI resources. Often, but not always, VOs are organised in Virtual Research Communities (VRCs). The EGI.eu website provides some information and guidance on Virtual Research Communities and Virtual Organisations including how to join or found VOs.

To tell resources (mainly for access and accounting purposes) which with which VO membership one would like to use the resources, the user needs to provide a proxy certificate, that is signed using one's one certificate, and which carries the proper VO attributes with it. The user then uses this proxy certificate instead of her own real Grid Certificate to access the resources. This is the reason why users need to be member of a VO, and must create proxy certificates for EGI resource access.

For Cloud purposes, EGI currently maintains multiple VOs, mapping the different user communities and experiments. A generic VO, called fedcloud.egi.eu, addresses the needs for testers, developers and generic users. EGI.eu provides a description of this VO on its own page.

You can apply for membership for the generic EGI Cloud Federation VO here. Note: This requires your Grid Certificate and private key be also stored in your Web Browser! Your membership should be granted fairly soon, so what's left is to set up VO information and VO trust for your command line environment.

Install VO client tools

To access the federated cloud you will need to install tools to create proxy certificates, and configure these so that they can create proper proxy certificates for you. The tools to be installed are the VOMS client tools that are developed as part of the EMI project.

These tools are available in the EGI UMD Repository for Scientific Linux 5, SL6 and Debian 6.

Debian >= 6 and Ubuntu 12.04

Follow the EGI UMD repository installation guide

Install the VOMS client via

apt-get update
apt-get install voms-clients3
RedHat Linux 6 and Scientific Linux 6

Follow the EGI UMD repository installation guide

Install the VOMS client via

yum install voms-clients3
Linux generic and Mac OS X
  • Obtain the latest snapshot (they are stable, though) from the IGI repository.
  • Unpack the archive into a directory of your choice (can be in your home directory):
$ tar xvzf voms-clients-3.0.0.tar.gz
  • Update your shell's $PATH variable to include the bin subdirectory of the voms clients, e.g.
$ export PATH=$PATH:~/voms-clients/bin

Adapt the path to your local needs.

You should now have a working VOMS Clients environment. Try it out using:

$ voms-proxy-info
Proxy not found: /tmp/x509up_u501 (No such file or directory)

This error message is normal, certainly for the first time, when no proxy certificate could be found. The path to the certificate file is composed of a default prefix, and the user id in the system (in my case, I have the user id of 501).

Configure VO membership information

The VOMS client tools require some configuration information to be able to create proxy certificates for you. For this, it needs access to your Grid Certificate (by default it looks in ~/.globus/usercert.pem) and your certificate's private key (by default in ~/.globus/userkey.pem) and configuration information for each VO membership service (VOMS) you need to create proxy certificates for.

Provided that you kept your Grid Certificate and private key in ~/.globus, the only thing you need to do is to set up the VOMS information for your VO. Again, the accepted default location makes it easy to use to use the tools. You have two choices for providing the configuration information:

  1. local to you, within your home directory, or
  2. global on your system, for all users

This guide will set up global VOMS VO information for the VO. To do so, you need the VO name and the VO VOMS information (server name, server port, certificate and CA subject). You can find this information in the VO ID card. For the generic EGI Federated Cloud VO, the VO name is fedcloud.egi.eu and the VOMS information are voms1.egee.cesnet.cz, 15002, /DC=org/DC=terena/DC=tcs/OU=Domain Control Validated/CN=voms2.grid.cesnet.cz, /C=NL/O=TERENA/CN=TERENA eScience SSL CA . The following part of the guide will refer to the fedcloud.egi.eu VO, but the same applies to all the other VOs (using the VO ID card information)

VO information is kept in two pivotal locations :

  • /etc/grid-security/vomsdir directlry, and
  • /etc/vomses file.

Each file serves a specific purpose that can be read up on elsewhere. The guide will explain how to create or amend these two locations for the fedcloud VO as follows:

Creating the vomsdir information

Usually, this information is provided by the VO manager. In this case, we will create it by hand as follows:

# mkdir -p /etc/grid-security/vomsdir/fedcloud.egi.eu
# cd /etc/grid-security/vomsdir/fedcloud.egi.eu
# cat >voms1.egee.cesnet.cz.lsc <<EOF 
/DC=org/DC=terena/DC=tcs/OU=Domain Control Validated/CN=voms1.egee.cesnet.cz
/C=NL/O=TERENA/CN=TERENA eScience SSL CA
EOF
# cat >voms2.grid.cesnet.cz <<EOF 
/DC=org/DC=terena/DC=tcs/OU=Domain Control Validated/CN=voms2.grid.cesnet.cz
/C=NL/O=TERENA/CN=TERENA eScience SSL CA
EOF
Extending/creating vomses file

This file is a list of VO contact informations to obtain any VO specific attributes and roles for your proxy certificate:

# cd /etc
# cat >>vomses <<EOF 
"fedcloud.egi.eu" "voms1.egee.cesnet.cz" "15002" "/DC=org/DC=terena/DC=tcs/OU=Domain Control Validated/CN=voms1.egee.cesnet.cz" "fedcloud.egi.eu" "24"
"fedcloud.egi.eu" "voms2.grid.cesnet.cz" "15002" "/DC=org/DC=terena/DC=tcs/OU=Domain Control Validated/CN=voms2.grid.cesnet.cz" "fedcloud.egi.eu" "24"
EOF
Testing the VO membership setup
$ voms-proxy-init -voms fedcloud.egi.eu --rfc --dont_verify_ac
Enter GRID pass phrase for this identity:

Created proxy in /tmp/x509up_u501.

Your proxy is valid until Thu Apr 04 04:02:38 CEST 2013

And finally list the info about your proxy certificate:

$ voms-proxy-info
subject   : /O=dutchgrid/O=users/O=egi/CN=Michel Drescher/CN=1746347155
issuer    : /O=dutchgrid/O=users/O=egi/CN=Michel Drescher
identity  : /O=dutchgrid/O=users/O=egi/CN=Michel Drescher
type      : RFC3820 compliant impersonation proxy
strength  : 1024
path      : /tmp/x509up_u501
timeleft  : 11:59:46
key usage : Digital Signature, Key Encipherment, Data Encipherment

Set up (r)OCCI tools

This tutorial uses the rOCCI client provided mainly by GWDG and CESNET. It is maintained as a GitHub project.

Ubuntu 12.04 LTS

sudo -s
wget -O /etc/apt/sources.list.d/occi-cli-ubuntu-precise-amd64.list http://repository.egi.eu/community/software/rocci.cli/4.2.x/releases/repofiles/ubuntu-precise-amd64.list
wget -qO - http://repository.egi.eu/community/keys/APPDBCOMM-DEB-PGP-KEY.asc | apt-key add -
apt-get update
apt-get -y install occi-cli

ln -s /opt/occi-cli/bin/occi /usr/bin/occi

Debian 6

sudo -s
wget -O /etc/apt/sources.list.d/occi-cli-debian-squeeze-amd64.list http://repository.egi.eu/community/software/rocci.cli/4.2.x/releases/repofiles/debian-squeeze-amd64.list
wget -qO - http://repository.egi.eu/community/keys/APPDBCOMM-DEB-PGP-KEY.asc | apt-key add -
apt-get update
apt-get -y install occi-cli

ln -s /opt/occi-cli/bin/occi /usr/bin/occi

Debian 7

sudo -s
wget -O /etc/apt/sources.list.d/occi-cli-debian-wheezy-amd64.list http://repository.egi.eu/community/software/rocci.cli/4.2.x/releases/repofiles/debian-wheezy-amd64.list
wget -qO - http://repository.egi.eu/community/keys/APPDBCOMM-DEB-PGP-KEY.asc | apt-key add -
apt-get update
apt-get -y install occi-cli

ln -s /opt/occi-cli/bin/occi /usr/bin/occi

RedHat 6 or SL6

sudo -s
wget -O /etc/yum.repos.d/rocci-cli.repo http://repository.egi.eu/community/software/rocci.cli/4.2.x/releases/repofiles/sl-6-x86_64.repo
yum install -y occi-cli

ln -s /opt/occi-cli/bin/occi /usr/bin/occi

Mac OS X

Detailed Mac OS X instruction are available here.

Other

On any system with Ruby >= 1.9.3 and Rubygems present, you can install the client by running

gem install occi-cli

Set up (b)CDMI tools

This tutorial uses the bCDMI client provided mainly by the Federated Cloud task force to access CDMI storage. It is maintained as a GitHub project.

bCDMI client is still in an experimental status. Please, install it only if you are aware about the latest developments. Otherwise skip this section.

bCDMI is implemented in Bash, using cURL and other UNIX tools, thus it can run on almost any Linux OS. To install the client:

Install the script

Debian > 6 or Ubuntu > 11.04
sudo apt-get install curl sed gawk
curl -o bcdmi https://raw.github.com/EGI-FCTF/bCDMI/master/bcdmi
curl -o bcdmi.auth https://raw.github.com/EGI-FCTF/bCDMI/master/bcdmi.auth
RedHat 6 or SL6
sudo yum install -y curl sed gawk
curl -o ~/bcdmi https://raw.github.com/EGI-FCTF/bCDMI/master/bcdmi
curl -o ~/bcdmi.auth https://raw.github.com/EGI-FCTF/bCDMI/master/bcdmi
Mac OS X
curl -o ~/bcdmi https://raw.github.com/EGI-FCTF/bCDMI/master/bcdmi
curl -o ~/bcdmi.auth https://raw.github.com/EGI-FCTF/bCDMI/master/bcdmi
Others

A Windows version of the client is available here.

Configure the bCDMI script

The default configuration of the bCDMI script should be is enough for most of the users. With this configuration, bCDMI automatically uses a X509 proxy for authentication and detects your VO from the proxy VOMS extensions.

Anyway, bCDMI has a wide set of authentication options who can be set into the bcdmi.auth file. Have a look to the contents of the default bcdmi.auth for more information.

Test

To test your command-line environment, you can run try to list the resources in one of the FedCloud sites. To do so:

Create a proxy certificate

$ voms-proxy-init -voms fedcloud.egi.eu --rfc --dont_verify_ac
Enter GRID pass phrase for this identity:

Created proxy in /tmp/x509up_u501.

Your proxy is valid until Thu Apr 04 04:02:38 CEST 2013

Check that your proxy certificate is valid

$ voms-proxy-info
subject   : /O=dutchgrid/O=users/O=egi/CN=Michel Drescher/CN=1746347155
issuer    : /O=dutchgrid/O=users/O=egi/CN=Michel Drescher
identity  : /O=dutchgrid/O=users/O=egi/CN=Michel Drescher
type      : RFC3820 compliant impersonation proxy
strength  : 1024
path      : /tmp/x509up_u501
timeleft  : 11:59:46
key usage : Digital Signature, Key Encipherment, Data Encipherment

Select a FedCloud site

Get the URL of the OCCI interface of one of the FedCloud sites, for example https://carach5.ics.muni.cz:11443/ and of the CDMI interface of one of the FedCloud sites, for example http://prisma-swift.ba.infn.it:8080/

List the image and resource templates

$ occi --endpoint https://carach5.ics.muni.cz:11443/ --action list --resource os_tpl --auth x509 --user-cred /tmp/x509up_u501 --voms

https://occi.carach5.ics.muni.cz/occi/infrastructure/os_tpl#monitoring
https://occi.carach5.ics.muni.cz/occi/infrastructure/os_tpl#egi_sl6goldenimage_cesnet
https://occi.carach5.ics.muni.cz/occi/infrastructure/os_tpl#generic_vm
https://occi.carach5.ics.muni.cz/occi/infrastructure/os_tpl#octave
https://occi.carach5.ics.muni.cz/occi/infrastructure/os_tpl#r
https://occi.carach5.ics.muni.cz/occi/infrastructure/os_tpl#metacloud_debian_7_0_x86_64_0001_fedcloud_dukan
https://occi.carach5.ics.muni.cz/occi/infrastructure/os_tpl#metacloud_ubuntu_12_04_lts_x86_64_0001_fedcloud_dukan
https://occi.carach5.ics.muni.cz/occi/infrastructure/os_tpl#metacloud_scilinux_6_5_x86_64_0001_fedcloud_dukan

List the contents of the CDMI storage

$ ./bcdmi -e http://prisma-swift.ba.infn.it:8080/ list
test/
test2/
test3/

$ ./bcdmi -e http://prisma-swift.ba.infn.it:8080/ stat
{
 "objectName": "AUTH_113d9a9a671944648722e890ecb94d36/",
 "capabilitiesURI": "/cdmi/AUTH_113d9a9a671944648722e890ecb94d36/cdmi_capabilities/rootcontainer/",
 "parentURI": "/cdmi/",
 "childrenRange": "0-2",
 "objectType": "application/cdmi-container",
 "children": [
   "test/",
   "test2/",
   "test3/"
 ],
 "metadata": {}
}