= Fedd Commands =

These are the various user level programs that the fedd package installs, including fedd itself.

== Fedd.py ==

The main federation daemon; when this documentation refers to `fedd` is is the `fedd.py` executable that is running.  It can run on any host as any user, provided permissions and keys are correct.  Most of `fedd`'s behavior is controlled by its [FeddConfig configuration files] and [FeddDatabases databases], there are a few command line arguments.

 '''--config='''''filename''::
  Use ''filename'' as the configuration file rather than the default `/usr/local/etc/fedd.conf`
 '''--debug'''::
  Produce additional error output
 '''--logfile='''''filename''::
  Redirect log output to ''filename'' rather than the default standard output

== Confirm_sshkey.py ==

The `confirm_sshkey.py` command is used by `fedd` to confirm that a local account can be accessed using an SSH public key.  It does this by accessing the Emulab database, and must run on `boss`.  It is included in the distribution for administrators who want to be able to confirm keys without patching `addpubkey`.

The command takes the same arguments as the extended version of `addpubkey`, which is to say the same arguments as the unextended `addpubkey` plus '''-C'''.  Other than installing it and adjusting the '''confirmkey''' parameter in the  [allocation] section of the [FeddConfig#AllocationOptions configuration file] users should rarely need this command.  By default the fedd package `confirm_sshkey.py` in `/usr/local/bin`.

== Exp_access_db.py ==

The `exp_access_db.py` command is a helper to generate [FeddDatabases#ExperimentControlComponentAccessDB experiment control component access databases].  It can be run on `boss` to print data in that database's format that can be redirected into a file for use as a database.  With no options it converts the entire users table of the database into an experiment control access database with an entry for each local project of which the user is a member.  The [FeddAbout#GlobalIdentifiers:Fedids fedid's] are generated from the user's SSL certificates as they appear in the Emulab database.

That behavior can be constrained using the following options.

 '''--user='''''username'''::
  Extract the information for ''username''.  Once '''--user''' is given once, only the users selected will be output.  The option may be specified more than once.
 '''--project='''''projectname''::
  Extract information only for the given project.  The option may be specified multiple times.
 '''--no-project-access'''::
  Do not generate a line for any of the projects a user is in.  Only generate lines of the form
{{{
fedid:xxx -> user
}}}
 '''--no-user-access'''::
  Do not generate a line without an enclosing project.  Only generate lines of the form
{{{
fedid:xxx -> (project,user)
}}}

Multiple user constraints are or-ed with each other as are multiple project constraints.  Then the resulting or clauses are and-ed together.  For example, the invocation
{{{
$ exp_access_db.py --user=faber --user=lahey --project=Deter --project=emulab-ops
}}}

produces output like

{{{
# faber
fedid:12ecc7415746281efa0ed58e180c51a5cba13a57->faber
fedid:12ecc7415746281efa0ed58e180c51a5cba13a57->(Deter,faber)
fedid:12ecc7415746281efa0ed58e180c51a5cba13a57->(emulab-ops,faber)
# lahey
fedid:d7da471ff2ba5b205d31ae379b1cf634c8dce1c6->lahey
fedid:d7da471ff2ba5b205d31ae379b1cf634c8dce1c6->(emulab-ops,lahey)
}}}

If the users are in other projects, those lines are suppressed; if the projects contain other users, those lines are suppressed.  The comment lines before each cluster of output help administrators understand which data corresponds to a given user.

As with other commands in the fedd package, it is installed in `/usr/local/bin` by default.

== Fedd_client.py ==

The `fedd_client.py` command is a simple command line interface to most of `fedd`'s interfaces.  It allows users to create terminate and interrogate experiments as well as to make access requests and request experiment splits.  The access and splitting commands are primarily for debugging.  Users who wish to make use of that function can consult the command's internal help message, by issuing one of

{{{
$ fedd_client.py split --help 
$ fedd_client.py access --help
}}}

The general syntax for invoking the command is:

{{{
$ fedd_client.py operation parameters
}}}

where operation is one of '''create, terminate, info, vtopo, vis, info, split, or access''' and the parameters are described below.

All commands take the following parameters:
 '''--cert='''''filename''::
  Certificate from which to derive the user's [FeddAbout#GlobalIdentifiers:Fedids fedid].  By default the contents of `.ssl/emulab.pem` in the user's home directory is used.
 '''--debug'''::
  Produce additional debugging output.
 '''--serializeOnly'''::
  Do not contact the `fedd`, but just print the SOAP or XMLRPC message to the standard output.
 '''--trusted='''''filename''::
  Use the certificates in ''filename'' as certificate authorities to confirm the server's identity.  Optional.
 '''--url='''''fedd_url'''::
  Fedd to contact.
 '''--transport=[xmlrpc|soap]'''::
  Use the given encoding of the service request.
 '''--trace'''::
  Print the SOAP exchanges to stderr.  Currently only the SOAP transport is supported.

The '''create''' command takes the following additional parameters:
 '''--experiment_cert='''''filename''::
  Store the certificate used to access the resulting experiment in ''filename''.  This certificate can be used as an input parameter to the terminate and informational commands below, but is an output parameter here.
 '''--experiment_name='''''exp_name''::
  Suggest ''exp_name'' to the `fedd` as a local identifier for the federated experiment.  The actual local name chosen will be returned from the command.
 '''--file='''''filename''::
  File containing the [FeddAbout#ExperimentDescriptions experiment description].
 '''--project='''''export_project''::
  The local project to export from the master testbed.
 '''--master='''''master_testbed''::
  The master testbed.  This should correspond to one of the annotations used for testbed names in the experiment.  The `fedd` will use its [FeddDatabases#ExperimentNameMappingDB experiment name mapping DB] to resolve that name to a testbed.
 '''--ssh_key='''''file''::
  Use the contents of ''file'' as the SSH key for service access in the experiment.  By default the contents of `.ssh/id_rsa.pub` is used.

An example of experiment creation is:

{{{
$ fedd_client.py create --file=test_fedd.tcl --master=deter --project=emulab-ops --url=https://users.isi.deterlab.net:23235 --transport=xmlrpc
}}}

The results are the local name of the experiment and its fedid printed to standard output.  If ''--experiment_file'' is given an X.509 certificate and private key are saved to the given file that can be used as a capability to access the experiment state.

The commands to access data about an experiment or to terminate it all take only two non-generic options:

 '''--experiment_file='''''filename''::
  The ''filename'' must contain a certificate valid for the experiment's fedid.  If so it is used to authenticate access to the experiment.  A password may be required if one has been added to the private key.
 '''--experiment_name='''''name''::
  The local name of the experiment to terminate.  Only the experiment creator can use this for access.

The informational commands are '''vtopo''', '''vis''', and '''info'''.  '''Vtopo''' and '''vis''' are equivalent to the analogous Emulab XMLRPC commands, and `fedd_client.py` prints thier results in raw XML.  '''Info''' provides more information about the experiment, and it is printed as a python hash.  These are primarily used for debugging rather than operations.

The '''image''', '''ns_image''' and '''status''' commands are more useful to users.  The first two create simple image files from either an existing federated experiment or from the experiment description.  '''image''' takes the same parameters as '''vtopo''', '''vis''', and '''info''' as well as:

 '''--output='''''file''::
 A file to store the image in.  The output format is determined by the file suffix.
 '''--format='''''fmt''::
 The image format to use.  Valid choices are '''jpg''', '''png''', '''svg''', and '''dot'''.  '''dot''' is graphviz input.
 '''--labels'''::
 Include node names and IP address information in the image.  This is the default.
 '''--no-labels'''::
  Omit node names and IP address information in the image.
 '''--pixels='''''pix''::
  Output an image that is ''pix'' pixels, square.

'''ns_image''' takes the same additional parameters as '''image''', but is takes '''create''' parameters instead.  It generates the image from the description rather than the existing experiment.  It does not create a federated experiment.

The '''status''' command is a modified '''info''' command that prints a single word that describes the status of an experiment:
 '''active'''::
 The experiment exists
 '''inactive'''::
 The experiment is not swapped in, or the user does not have the right to acces it
 '''swapping'''::
 The experiment is swapping in.
 '''unknown'''::
 The experiment state could not be determined

The '''terminate''' command stops a federated experiment and removes the access granted from the federants.

The '''split''' and  '''access''' commands are really only for developers.  They are not described here, but

{{{
$ fedd_client.py access --help
$ fedd_client.py split --help
}}}

provides information on their use.

== Fedid.py ==

The `fedid.py` command prints the [Feddabout#Globalidentifiers:Fedids fedid] of the public key of an X.509 certificate to the standard output.  This is handy in getting fedids for the various [FeddDatabases databases] that `fedd` uses.  The command is invoked with 0 or more '''--attribute='''''attr'' parameters and 0 or more filenames.  The command prints the fedids and the attributes in the format of a [FeddDatabases#GlobalAccessDB global access database] and can be used directly to construct those files.  For example, this invocation:

{{{
$ fedid.py --attribute=split --attribute=allocate fedd.pem deterboss.pem
}}}

produces

{{{
fedid:ce90957dd5b7d20f9c3890c4599313b7f1cf31ea split,allocate
fedid:9b8e7f2b114956ad516befc93fa7e7eae3751bf9 split,allocate
}}}

== User_to_project.py ==

The `user_to_project.py` command exists to provide command line functionality that Emulab keeps in a web page.  It attaches a user to a project.  It is called by a `fedd` running on `boss` when a project is dynamically created.  Its default installation destination and the default value for the [experiment_control] parameter '''user_to_project''' both default to `/usr/local/bin/user_to_project.py`.  It is unlikely a user will ever need to run this command.