Fed4Fire with Omni

Although omni is explicitly stated as a compatible tool for working with Fed4Fire, finding documentation on how to do so can be complicated.

This page presents a working configuration file for using Fed4fire with omni completed with any useful considerations.

Omni configuration

[omni]
default_cf = fedblock
users = userblock
aggregates=g5k

[fedblock]
type=chapi
cert=<path_to_federation_certificate_and_key>
key=<path_to_federation_certificate_and_key>
ch=https://
ma=https://www.wall2.ilabt.iminds.be:12369/protogeni/xmlrpc/geni-ma/2
sa=https://www.wall2.ilabt.iminds.be:12369/protogeni/xmlrpc/geni-sa/2

[userblock]
urn = urn:publicid:IDN+wall.ilabt.iminds.be+user+<username>
keys = ~/.ssh/id_rsa.pub

[aggregate_nicknames]
g5k=urn:publicid:IDN+am.grid5000.fr+authority+am,https://am.grid5000.fr/

Fields details

• [omni]
  • Fields within this block represents your default settings, they mostly point to other blocks in the configuration file.
• [fedblock]

  • type

  Must be chapi (not sfa) to communicate with the member and slice authority set up by Fed4Fire.

  (thanks to Brecht Vermeulen for this indication)

  • cert

  Path to the certificate provided by the Fed4Fire user authority, usually the same as the key.

  • key

  Path to the key provided by the Fed4Fire user authority, usually the same as the cert cert.

  • ch (Clearing House)

  Made useless by providing ma and sa but still mandatory, must at least contain a valid protocol.

  • ma (Member authority)

  Address of Fed4Fire Member Authority API.

  (as seen in jFed-probe)

  • sa (Slice authority)

  Address of Fed4Fire Slice Authority API.

  (as seen in jFed-probe)

• [userblock]

  • urn

  URN attributed by federation authority, can be found in the certificate under Subject Alternative Name.

  Usually "urn:publicid:IDN+wall.ilabt.iminds.be+user+<username>".

  • keys

  Path to ssh keys

• [aggregate_nicknames]
  • List of aliases for Aggregate Managers (AM) written as :

<alias>=<URN>,<address>

the URN is optional, do not forget the coma