Administrators can build wrapper commands around pdsh for commands that are frequently used across multiple
systems and Serviceguard clusters. Several such wrapper commands are
provided with DSAU. These wrappers are Serviceguard cluster-aware
and default to fanning out cluster-wide when used in a Serviceguard
environment. These wrappers support most standard pdsh command line options and also support long options (--option syntax) .
- cexec
cexec is a general purpose pdsh wrapper. In addition
to the standard pdsh features, cexec includes a reporting feature. Use the --report_loc option to have cexec display the report location
for a command. The command report records the command issued in addition
to the nodes where the command succeeded, failed, or the nodes that
were unreachable. The report can be used with the --retry option to replay the command against nodes that failed, succeeded,
were unreachable, or all nodes.
- ccp
ccp is a wrapper for pdcp and copies files cluster-wide
or to the specified set of systems.
- cps
cps fans out a ps command across a set of systems
or cluster.
- ckill
ckill allows the administrator to signal a process by name since the pid
of a specific process will vary across a set of systems or the members
of a cluster.
- cuptime
cuptime displays the uptime statistics for a set of systems or a cluster.
- cwall
cwall displays a wall(1M) broadcast message on multiple
hosts.
All the wrappers support the CFANOUT_HOSTS environment variable
when not executing in a Serviceguard cluster. The environment variable
specifies a file containing the list of hosts to target, one hostname
per line. This will be used if no other host specifications are present
on the command line. When no target nodelist command line options
are used and CFANOUT_HOSTS is undefined, the command will be executed
on the local host.
For more information on these commands, refer
to their reference manpages.
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