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authorNarayan Desai <desai@mcs.anl.gov>2008-01-16 16:21:17 +0000
committerNarayan Desai <desai@mcs.anl.gov>2008-01-16 16:21:17 +0000
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-<chapter id='chap:reports'>
- <title>BCFG2 Reports</title>
-
- <para>
- Reports play an important role in effectively managing systems
- with BCFG. There are two primary functions they fulfill; providing
- otherwise unobtainable information, and presenting common
- information in a compact, effective format that allows for easier
- admistration. Reports can contain system statistics, discrepancies
- between specified and actual configuration, invalid configuration
- notices, and auditing information, among other things. </para>
-
- <para>
- The flexible XML configuration file allows reports to be configured
- to deliver only the information that is important. Additional reports
- can easily be created, providing site-specific capability to manage
- at record effiency. The capability to harvest information regarding
- statistics, configuration, and problems in a single location should
- prove to be powerful.
- </para>
-
- <section id='sec:reports-how'>
- <title>How it works</title>
-
- <para>
- The BCFG2 Reporting System consists of a number of elements
- including the <command>bcfg2-build-reports</command> Executable, a
- configuration file, and XSLT transform
- files. <command>bcfg2-build-reports</command> reads a default
- configuration file (or a config file specified on the command
- line) then prepares and delivers the reports according to the
- format defined in the transform files. It is expected that this
- executable will be run by the adminstrator periodically via
- <command>cron</command> or similar facility. The executable can
- also be run manually on demand for a special sort of report that
- needs to be generated immediately. </para>
-
- <para>
- <command>bcfg2-build-reports</command> gets the data it reports from a
- number of sources. <filename>Metadata/clients.xml</filename>
- contains information about if a host is currently pingable or
- not. <command>bcfg2-ping-sweep</command> will be run
- automatically by <command>bcfg2-build-reports</command> if the
- <filename>Metadata/clients.xml</filename> file is out of date
- with pingability information.
- </para>
-
- <para>
- The next place <command>bcfg2-build-reports</command> gets data from is
- the <filename>statistics.xml</filename> file. This file is
- maintained by bcfgd, and is updated whenever a client updates,
- therefore is always up to date and no maintainance is required
- on this file. Most of the information in the predefined reports
- come from this file.
- </para>
-
- <para>
- Finally <command>bcfg2-build-reports</command> is able to pull information
- from the <filename>Metadata/groups.xml</filename> file as well.
- This allows reports to describe the configured profile for each client.
- </para>
- </section>
-
- <section id='sec:report-types'>
- <title>Report Types</title>
-
- <para>
- There are a number of report types and delivery styles to
- present and transmit the reported data. The reporting structure
- lends itself best to structuring reports around groups of
- machines. For any group of machines any number of reports are
- generated. Each report may be delivered via Mail, WWW, or RSS
- (or any combination of the three.) In the future additional
- report types will be added, and if necessary, additional types
- of deliveries will be created. It is easy to create your own
- custom report using XSLT. Tables describing report types and
- report delivery mechanisms follow: </para>
-
- <table id='table:report-types'>
- <title>Bcfg2 Report Types</title>
- <tgroup cols='2'>
- <colspec colnum='1' colwidth='1*'/>
- <colspec colnum='2' colwidth='4*'/>
- <thead>
- <row><entry>Report Type</entry><entry>Description</entry></row>
- </thead>
- <tbody>
- <row><entry>Overview-Stats</entry>
- <entry>
- <para>
- This report provides information about a large number
- of machines and their states. It is often found to be
- useful when the constituent machines are simply
- specified as All Nodes, which gives an overall outlook
- on your network's health. It makes sense to get this
- report via any mechanism.
- </para>
- </entry></row>
- <row><entry>Nodes-Digest</entry>
- <entry>
- <para>
- This report includes details about each node,
- specifically what packages, files, etc are broken, and
- other node specific info. It makes sense to recieve
- this via any mechanism.
- </para>
- </entry></row>
- <row><entry>Nodes-Individual</entry>
- <entry>
- <para>
- This report includes details about each node, but
- information is separated in to separate sections (such
- as separate e-mails or RSS articles) for delivery.
- This works well with e-mail (using filters on the
- client side) and for error detection (getting e-mail
- when there is a problem. Currently WWW is not a supported
- delivery mechanism for this type of report, because it is
- not completely clear how such a report could be used.
- </para>
- </entry></row>
- </tbody>
- </tgroup>
- </table>
-
- <table id='table:report-delivery'>
- <title>Bcfg2 Report Delivery Mechanisms</title>
- <tgroup cols='2'>
- <colspec colnum='1' colwidth='1*'/>
- <colspec colnum='2' colwidth='3*'/>
- <thead>
- <row><entry>Name</entry><entry>Description</entry></row>
- </thead>
- <tbody>
- <row><entry>www</entry><entry>an XHTML file</entry></row>
- <row><entry>rss</entry><entry>an RSS file <comment>(links do
- not point at real web links, since they may not exist)</comment></entry></row>
- <row><entry>mail</entry><entry>A plaintext e-mail
- message</entry></row>
- </tbody>
- </tgroup>
- </table>
-
- </section>
-
- <section id='sec:reports-configuration'>
- <title>Configuration</title>
-
- <para>The <filename>report-configuration.xml</filename> file is
- the standard file that the <command>bcfg2-build-reports</command>
- executable uses when it is run without any command line
- arguments. Alternate configuration files, formatted identically,
- can be used by specifing -c flag. This can be useful for
- running different types of reports at different intervals. For
- example:</para>
-
- <programlisting>
- Run this hourly: bcfg2-build-reports -c WebAndRssReport-config.xml
- Run this daily: bcfg2-build-reports -c emailReports-config.xml
- </programlisting>
-
- <para>The <filename>report-configuration.xml</filename>
- file is structured with a root
- <![CDATA[<Reports/>]]> tag at the top level. Within this tag any number
- of
- <![CDATA[<Report/>]]> tags can be inserted. Each report is structured
- around a group of machines. <![CDATA[<Machine/>]]> tags may individually
- reference a machine by hostname, or by a Python Regular
- Expression describing a group of hostnames. ".*" is especially helpful
- to describe all hosts. More information can be found about such Regexes
- at: <ulink url="http://docs.python.org/lib/re-syntax.html"/>.</para>
-
- <para>Any number of <![CDATA[<Delivery/>]]> elements can be
- defined for a given report. A delivery consists of a mechanism
- and type. The mechanism would be something like Mail or Web,
- and the type would describe the intended content of the
- report. Some are tailored to overall machine health, while
- others could be best fit for auditing purposes</para>
-
- <para>Finally, each <![CDATA[<Delivery/>]]> element contains one
- or more <![CDATA[<Destination/>]]> elements. In the case of an
- RSS or WWW report, the destination should be a complete path to
- the output file including the file's name. In e-mail based
- reports the destination should be a valid e-mail address.</para>
-
- </section>
-
- <section id='sec:reports-quick-start'>
- <title>Reporting Quick Start</title>
-
- <para>
- The following configuration will generate two separate reports
- and deliver them in a number of different ways. For more
- information on exactly what each section does, please refer to
- the Configuration section above. </para>
-
- <example id='ex:report-config'>
- <title>etc/report-configuration.xml</title>
- <programlisting><![CDATA[<Reports>
- <Report name='core_stats' good='Y' modified='Y'>
- <Delivery mechanism='mail' type='nodes-digest'>
- <Destination address='user@domain.tld'/>
- <Destination address='user@otherdomain.tld'/>
- </Delivery>
- <Delivery mechanism='www' type='nodes-digest'>
- <Destination address='/var/www/core_stats.html'/>
- </Delivery>
- <Machine name='.*'/>
- </Report>
-
- <Report name='stats_for_a_machines' good='N' modified='Y'>
- <Delivery mechanism='mail' type='nodes-digest'>
- <Destination address='user@domain.tld'/>
- </Delivery>
- <Delivery mechanism='mail' type='overview-stats'>
- <Destination address='user@otherdomain.tld'/>
- </Delivery>
- <Machine name='a.*'/>
- <Machine name='x-aim'/>
- </Report>
- </Reports>]]>
- </programlisting>
- </example>
-
- <para>
- Once configured correctly, just wait for the e-mail or view the
- outputed html files with a web browser.
- <command>bcfg2-build-reports</command> to recieve your reports
- immediately, or configure cron to run it perodically. E-mail
- reports will deliver the appropriate content directly to your
- mail client, and the html files should be viewable with any web
- browser. It is suggested those files be accessable via a
- webserver for convenience to other interested parties.
-
- </para>
-
- <mediaobject>
- <imageobject>
- <imagedata fileref='./images/composed.tif'/>
- </imageobject>
-
- <caption>
- <para>Examples of the performance and overview reports.</para>
- </caption>
- </mediaobject>
- </section>
-</chapter>