CRM_DIFF(8)							  [FIXME: manual]						       CRM_DIFF(8)

NAME

       crm_diff - identify changes to the cluster configuration and apply patches to the configuration files

SYNOPSIS

	   crm_diff [-?|-V] [-o filename] [-O string] [-p filename] [-n filename] [-N string]

DESCRIPTION

       The crm_diff command assists in creating and applying XML patches. This can be useful for visualizing the changes between two versions of
       the cluster configuration or saving changes so they can be applied at a later time using cibadmin.

OPTIONS

       --help, -?
	   Print a help message.

       --original filename, -o filename
	   Specify the original file against which to diff or apply patches.

       --new filename, -n filename
	   Specify the name of the new file.

       --original-string string, -O string
	   Specify the original string against which to diff or apply patches.

       --new-string string, -N string
	   Specify the new string.

       --patch filename, -p filename
	   Apply a patch to the original XML. Always use with -o.

       --cib, -c
	   Compare or patch the inputs as a CIB. Always specify the base version with -o and provide either the patch file or the second version
	   with -p or -n, respectively.

       --stdin, -s
	   Read the inputs from stdin.

EXAMPLES

       Use crm_diff to determine the differences between various CIB configuration files and to create patches. By means of patches, easily reuse
       configuration parts without having to use the cibadmin command on every single one of them.

	1. Obtain the two different configuration files by running cibadmin on the two cluster setups to compare:

	       cibadmin -Q > cib1.xml
	       cibadmin -Q > cib2.xml

	2. Determine whether to diff the entire files against each other or compare just a subset of the configurations.

	3. To print the difference between the files to stdout, use the following command:

	       crm_diff -o cib1.xml -n cib2.xml

	4. To print the difference between the files to a file and create a patch, use the following command:

	       crm_diff -o cib1.xml -n cib2.xml > patch.xml

	5. Apply the patch to the original file:

	       crm_diff -o cib1.xml -p patch.xml

FILES

       /var/lib/heartbeat/crm/cib.xml--the CIB (minus status section) on disk. Editing this file directly is strongly discouraged.

SEE ALSO

       ???

AUTHOR

       crm_diff was written by Andrew Beekhof.

[FIXME: source] 						    07/05/2010							       CRM_DIFF(8)