About FACT Configuration Files

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===Wildcard Values===
===Wildcard Values===

Revision as of 23:14, 23 May 2008

FACT uses four types of configuration files that you must create. This section describes the files.

Contents

About Master Configuration Files

FACT reads a master configuration file, which may specify other subsidiary configuration files. FACT searches for the master configuration file in the following files, using the first master configuration file that it finds:

file specified by -c or --config-file command option
file specified by FACT_CONF environment variable
~/fact.conf (i.e., .fact.conf in user's home directory)
/etc/fact.conf
compiled-in defaults


The master configuration file contains name-value pairs, one per line. The parameter is separated from its value by a colon. Blank lines and comments that start with a pound character (#) are ignored. The following parameters are permitted:

  • repository: directory
The directory where FACT stores its data.
  • credential-file: file
A file containing credentials. (See About Credentials Files.)
  • managed-nodes: type pattern
A managed-node definition. (See About Managed Node Definitions Files.)
  • managed-node-file: file
A file containing managed node definitions. (See About Managed Node Definitions Files.)
  • guid-name: guid name
A GUID name definition. (See About GUID Name Definitions.)
  • guid-names-file: file
A file containing GUID name definitions. (See About GUID Name Definitions.)
  • log-file: file
A log file created by the syslog and monitored by FACT.
  • subnet-manager: domain name or IP address
The name of the Subnet Manager that FACT should use.
  • ibportstate-host: host
The host on which FACT should run ibportstate to control switch ports. The default is localhost.
  • ibportstate-command: path
The path to the ibportstate command on the ibportstate host. The default is ibportstate.
  • ibspark-host: host
The host on which FACT should run ibspark. The default is ibspark.
  • ibspark-command: path
The path to the ibspark command on the ibspark host. The default is localhost.


Note: The credential-file, log-file, managed-nodes, managed-node-file, guid-name, and guid-names-file parameters may be repeated any number of times, and their effects are cumulative.


The following example shows one possible master configuration file:

  repository: /var/local/db/fact
  credential-file: /etc/fact/cred


For information about creating master configuration files, see Creating a Master Configuration File.

About Managed Node Definitions Files

A managed node is either a host or a managed switch. FACT must know about all of the managed nodes in any given network so that it can scan the network. Managed node definitions tell FACT the hostname or IP address and the type of each managed node. If managed nodes are not defined, FACT cannot connect to the switch management ports and collect the necessary information.


Names may be specified using node-list expansions, which are separated by commas, with no spaces. FACT has three types of expansions:

  • Alternate—For example, leaf[A,C,D] expands to leafA, leafC, leafD.
  • Range—For example, leaf[1-10] expands to leaf1, leaf2...leaf10.
  • Combination of alternate and range—For example, rack[A,C]host[1-32] expands to rackAhost1, rackAhost1...rackChost32 (64 names total).


FACT managed-nodes have three types:

  • SFSOS switch—Any Cisco Server Fabric Switch running Cisco SFS operating system software
  • OEM switch—The Cisco SFS 7012 and Cisco SFS 7024
  • host—A host running Unix


Managed-nodes can be listed directly in the master configuration file using the "managed-nodes" directive or in a separate file. A separate managed-nodes file has a node type and a list, as shown in the following example:

  SFSOS switch switch[00-07] 
  host host-r[1-3,5]-[0-32] 

The ranges in square brackets are expanded.


FACT looks in the following places for managed node definitions, with the highest priority sources listed first:

  • Command options—managed-nodes=<type>:<pattern>
  • Files specified by—managed-nodes-from=<file> options
  • Definitions in the FACT_MANAGED_NODES environment variable
  • Files in FACT_MANAGED_NODE_FILES environment variable (colon-separated list)
  • Definitions in managed-nodes parameters in the master configuration file
  • Files in managed-node-file parameters in the master configuration file


The managed node definitions file expands to six switch names: rackAleaf1 through rackAleaf3 and rackCleaf1 through rackCleaf3. It also expands to 64 host names: rackBcompute01 through rackDcompute32. If your managed-nodes follow this type of simple name scheme, you may place them into a master configuration file, as shown in the following example with managed-node parameters in the master configuration file:

  managed-nodes: SFSOS switch rack[A,C]leaf[1-3] 
  managed-nodes: host rack[B,D]compute[01-32] 


For information about creating a managed node definitions file, see Creating a Separate Managed Node Definitions File.

About Credentials Files

For each managed node into which it logs, FACT must know which username and password to use. The credentials file provides this information. A credentials file consists of multiple stanzas. Each stanza begins with a device type line and is followed by several name-value pairs. Blank lines and comments starting with the pound sign (#) are ignored.


FACT looks in the following locations for credential files. The highest-priority locations, which are listed first, override definitions in later locations.

  • Command options—credentials-from=file
  • Files specified in FACT_CREDENTIAL_FILES environment variable (colon-separated list)
  • Files specified in credentials-file parameters in the master configuration file
  • Built-in defaults


FACT contains the following built-in default credentials:

SFS OS switch
method: ssh
user: super
password: super
OEM switch
method: ssh
user: admin
password: admin
host
method: ssh
HSM-command: sudo /usr/local/topspin/sbin/ib_sm_cli \ || sudo /usr/sbin/ib_sm_cli
vstat command: /usr/local/topspin/bin/vstat --verbose
password: no default password exists

For information about creating a credentials file, see Creating a Credentials File.


Device Types

The device type line in the credentials file contains a device type, followed by a wildcard value that matches a set of device names. Table 1 lists the device types that may appear in the device type line, and Table 2 lists the wildcard values.


Table 1: Device Types
Device Type Description
host A host running Unix
SFSOS switch A switch running SFS OS
OEM switch A Cisco OEM switch (SFS 7012 and SFS 7024 only)

Wildcard Values

A wildcard is matched against managed-node names using a specific set of values. Table 2 lists the wildcard values against which the managed-node names are matched.

Note: In the wildcard values represented below, where letters are used, actual wildcards can be either letters or numbers.


Table 2: Wildcard Values
Wildcard Value Description
* Matches any substring
? Matches any single character
[a,b] Matches either a or b
[a-b] Matches anything in the range of a through b, where a and b can be either letters or numbers
[a,c-e] Matches either a, c, d, or e


Name-Value Pairs

The credentials file must contain name-value pairs that have specific, allowed parameters. Table 3 lists the legal parameters for the name-value pairs in the credentials file.

Table 3: Parameters for Name-Value Pairs
Name-Value Pair Description
user Login username. The default is "super" on SFS OS switches and "admin" on OEM switches. No default exits on the host.

Most users do use this parameter.

password Login password. The default is "super" on SFS OS switches and "admin" on OEM switches. No default exists on other devices.

Most users do use this parameter.

method Method in which FACT connects to the device

Legal values are "SSH" to "direct." The default is "direct for the localhost and "SSH" for others. Most users do not user this parameter.

port TCP port number to user for SSH. The default is 22.

Most users do not use this parameter

ssh-identity The SSH identity file to use for authentication. FACT does not use the default identity file, yet, SSH defaults to ~/.ssh/id_rsa or id_dsa.

Most Users do not use this parameter.

HSM-command The executable program to invoke the HSM CLI. The default is /usr/local/topspin/sbin/ib_sm_cli or /usr/sbin/ib_sm_cli.

Most users do not use this parameter.

vstat-command The vstat command, used to invoke vstat, includes the full path to the command and the verbose argument, which returns more information.The default is /usr/local/topspin/bin/vstat --verbose.

Note: The vstate parameter is part of the Cisco host driver stack. If you are using OFED host drivers and your Cisco stack is installed in the normal way, you do not need to use the verbose parameter.

Most users do not use this parameter.


Note: The SSH method uses SSH to connect to the managed node. The direct method is only used to scan the host upon which FACT is running. (See Understanding Secure Shell for more information about SSH.)


The following example shows a possible credentials file:

(#) This is a comment.
SFSOS switch switch4*
user: jsmith
password: t0psekr1t
host hsm-[1-3]
method: ssh
user: fact
ssh-identity: ~/.ssh/id_rsa


FACT looks in the following locations for credentials files. The highest-priority locations, which are listed first, override definitions in later locations.

  • Command options—credentials-from=file
  • Files specified in FACT_CREDENTIAL_FILES environment variable (colon-separated list)
  • Files specified in credentials-file parameters in the master configuration file
  • Built-in defaults

About GUID Name Definitions

A GUID is a 64-bit number that is used to identify several types of InfiniBand components. Components that have GUIDs are Host Channel Adapters, switch chips, ports, and switch chassis. GUIDs are usually displayed as hexadecimal octets separated by colons, as shown in the following example:


  00:02:c9:02:00:22:2a:c4


FACT uses GUID name definitions to associate GUIDs with names. FACT automatically builds its own associations between GUIDs and names. If FACT knows the host domain name or IP address, or the switch management port domain name or IP address, it uses this information as the switch name. If FACT does not know the GUID name of a switch, FACT refers to the switch by its system image GUID.


Optionally, you can augment and override the user-generated list and assign any name that you choose to a GUID by creating a GUID name definitions file in the master configuration file. FACT uses that GUID name when referring to that object and when showing information from a scan. Assigned GUID name definitions are most useful when you work with unmanaged switches. Without an assigned GUID name definition, there is no way for FACT to refer to an unmanaged switch except by its node GUID.


FACT looks in the following locations for GUID name definitions. Higher-priority sources are listed first in the following list, and they override lower priority sources:

  • Command options—guid-name=guid:name
  • Files specified by—guid-names-from=file command options
  • Definitions in the FACT_GUID_NAMES environment variable (comma-separated list)
  • Files in FACT_GUID_NAME_FILES environment variable (colon-separated list)
  • Definitions in guid-name parameters in the master configuration file
  • Files in guid-names-file parameters in the master configuration file


The GUID name definition contains two pieces of information, the eight-byte GUID name and the name you assign to it, separated by spaces or commas. The following example shows a possible name definition file:

  00:11:22:33:44:55:66:77 myswitch01
  00:11:22:33:44:55:66:78 myswitch02
  00:11:22:33:44:55:66:79 myswitch03
  11:22:33:44:55:66:77:88 myhost01


If you do not want FACT to log in to each host in your cluster, and if FACT cannot determine the host names from the Subnet Manager, you can use GUID names to help FACT display useful names for your hosts.


Note: You can also attach a name to a system image GUID, a chassis GUID, or a port GUID.


For information about creating GUID name definitions files, see Creating a GUID Name Definition File.

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