CPUSHIMAGE

Section: C3 User Manual (4)
Updated: 4.0
Index Return to Main Contents
 

NAME

cpushimage - A utility to push hard drive images created by SystemImager from a server to the cluster nodes.  

SYNOPSIS

Usage: cpushimage [OPTIONS] [MACHINE DEFINITIONS] image_name  

DESCRIPTION

cpushimage is a utility to push hard drive images created by SystemImager from a server to the cluster nodes by executing the SystemImager updateclient script on each node. The updateclient script then retrieves the specified image from the server and updates the cluster node. In order to use cpushimage, you must be the root user.  

OPTIONS

--help -h
:display help message

--nolilo
:don't run LILO after update

--reboot -r
:reboot nodes after updates complete

--file -f
:alternate cluster configuration file if one is not supplied then /etc/c3.conf will be used

-i
:interactive mode, ask once before executing

--all
:execute command on all nodes in all clusters that are accessible. When specifying --head only the head nodes will participate. This ignores the [MACHINE_DEFINITIONS] section.
 

GENERAL

There are ways to call cpushimage:

1. To push an image to the local cluster:

cpushimage base_image

2. to push an image on a remote cluster

cpushimage cluster2: weather_image

Note: when pushing an image on a remote cluster the image must reside on the head node of that cluster, that is the image being pushed to any given cluster MUST reside on that clusters head node.

3. to push an image to a subset of a cluster

cpushimage cluster3:0-3 test_image

Only pushes the image to the first four nodes of the cluster (0 , 1, 2, 3)
 

SETUP

See the C3 INSTALL file for installation instructions. Also see C3-range for help on node ranges on the command line. If using the scalable setup please see c3-scale

 

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 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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Computer Science and Math Division
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Last Modified: Fri 08-22-2014