06-19-2008
Unless your XML document is very small, you should use an XML processor to extract the required elements and attributes. Classic UNIX tools such as sed and awk are not really suited to manipulating XML documents nor were they designed or intended for this purpose.
xsltproc is one such processor which uses an XSL stylesheet to transform the document into the required output. There are a large number of other XML document transformation tools available. Just do a Web search.
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LEARN ABOUT CENTOS
crm_diff
PACEMAKER(8) System Administration Utilities PACEMAKER(8)
NAME
Pacemaker - Part of the Pacemaker cluster resource manager
SYNOPSIS
crm_diff original_xml operation [options]
DESCRIPTION
crm_diff - A utility for comparing Pacemaker configurations (XML format)
The tool produces a custom (diff-like) output which it can also apply like a patch
OPTIONS
-?, --help
This text
-$, --version
Version information
-V, --verbose
Increase debug output
Original XML:
-o, --original=value
XML is contained in the named file
-O, --original-string=value
XML is contained in the supplied string
Operation:
-n, --new=value
Compare the original XML to the contents of the named file
-N, --new-string=value
Compare the original XML to the contents of the supplied string
-p, --patch=value
Patch the original XML with the contents of the named file
Additional Options:
-c, --cib
Compare/patch the inputs as a CIB (includes versions details)
-f, --filter
Suppress irrelevant differences between the two inputs
EXAMPLES
Obtain the two different configuration files by running cibadmin on the two cluster setups to compare:
# cibadmin --query > cib-old.xml
# cibadmin --query > cib-new.xml
Calculate and save the difference between the two files:
# crm_diff --original cib-old.xml --new cib-new.xml > patch.xml
Apply the patch to the original file:
# crm_diff --original cib-old.xml --patch patch.xml > updated.xml
Apply the patch to the running cluster:
# cibadmin --patch patch.xml
AUTHOR
Written by Andrew Beekhof
REPORTING BUGS
Report bugs to pacemaker@oss.clusterlabs.org
Pacemaker 1.1.10-29.el7 June 2014 PACEMAKER(8)