CNAME
Section: C3 User Manual (1)
Updated: 4.0
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NAME
cname - A utility that returns the node names specified by the range specified on the command line.
SYNOPSIS
Usage: cname [OPTIONS] [MACHINE DEFINITIONS]
DESCRIPTION
cname is a utility that returns the node names specified by the command line. Node ranges are specified as explained in the c3-range(5) man page
OPTIONS
- --help -h
-
:display help message
- --file -f <filename>
-
:alternate cluster configuration file if one is not supplied then /etc/c3.conf will be used
GENERAL
There are two ways to call cname:
1. To search the default cluster:
-
cname :0-5
This prints the node names one per line (note, if cname is typed in with no range specified the entire cluster is printed)
2. To search specific clusters
-
cname cluster1: cluster2:4-8
This prints the node names on per line
SETUP
See the C3 INSTALL file for installation instructions. Also see C3-range for help on node ranges on the command line
ENVIRONMENT
C3_RSH
-
By default, the C3 tools will use ssh to issue the remote commands. If you would like to have them use rsh instead, you must set the C3_RSH environment variable to rsh.
-
For example, if you are using the bash shell you would do the following:
export C3_RSH=rsh
any program that behaves like rsh or ssh is acceptable
C3_PATH
-
The default install path for C3 is /opt/c3-4. If you install C3 in an alternate location this variable must point to that installation. For remote clusters C3 must be installed in the same directory on each cluster.
-
For example, if you installed C3 in your home directory you might use the following:
export C3_PATH=/home/sgrundy/c3-4
C3_CONF
-
C3's default configuration file is /etc/c3.conf. If you wish an alternate default configuration file set this to point to the file
-
For example, if you keep a special c3.conf file in your home directory you may use:
export C3_CONF=/home/sgrundy/.c3conf
C3_USER
-
By default, the C3 tools will use your local username to access a remote cluster. If you wish to use a different default then set this variable to it
-
For example, this will change the example user from sgrundy to mmanhunter:
export C3_USER=mmanhunter
FILES
/etc/c3.conf
-
This file is the cluster configuration file that contains the names of the nodes to which commands will be sent. The cluster configuration file of nodes may also be specified from the command line. The format of both files is identical.
-
See the c3.conf(5) man page for the format
SEE ALSO
cexec(1), c3(1), cget(1), ckill(1), cpush(1
), cpushimage(4), crm(1), cshutdown(4), cname(1), cnum(1), clist(1), c3.conf(5), c3-scale(5)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- GENERAL
-
- SETUP
-
- ENVIRONMENT
-
- FILES
-
- SEE ALSO
-
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