Added description of system parameters and related database tables.

diff --git a/doc/erd.obj b/doc/erd.obj
index 4ccd154..3f7fb30 100644 (file)
--- a/doc/erd.obj
+++ b/doc/erd.obj
@@ -1,7 +1,7 @@
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-% @(#)$Header: /src/cvsroot/gnucomo/doc/erd.obj,v 1.1 2002-09-05 13:21:45 arjen Exp $
+% @(#)$Header: /src/cvsroot/gnucomo/doc/erd.obj,v 1.2 2002-11-20 18:15:29 arjen Exp $

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@@ -474,7 +442,7 @@ str_seg('black','Helvetica-Bold',1,80640,45,14,3,0,-1,0,0,0,0,0,
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-       432,576,432,620,484,620,484,640],0,1,1,546,0,0,0,0,0,0,0,'1',0,0,
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diff --git a/doc/manifest.xml b/doc/manifest.xml
index d483283..4e9c7a5 100644 (file)
--- a/doc/manifest.xml
+++ b/doc/manifest.xml
@@ -11,9 +11,9 @@
 
    <author>Brenno J.S.A.A.F. de Winter, De Winter Information Solutions</author>
    <author>Arjen Baart, Andromeda Technology &amp; Automation</author>
 
    <author>Brenno J.S.A.A.F. de Winter, De Winter Information Solutions</author>
    <author>Arjen Baart, Andromeda Technology &amp; Automation</author>

-   <date>November 07, 2002.</date>
+   <date>November 15, 2002.</date>

    <docinfo>
    <docinfo>

-      <infoitem label="Version">0.21</infoitem>
+      <infoitem label="Version">0.22</infoitem>

    </docinfo>
 
 </titlepage>
    </docinfo>
 
 </titlepage>


@@ -117,6 +117,12 @@ and not run into unneeded disappointments.
       Combined chapters 4 through 7 into one chapter (4).
     </col>
   </row>
       Combined chapters 4 through 7 into one chapter (4).
     </col>
   </row>

+  <row>
+    <col>0.22</col><col>Arjen Baart</col><col>Nov 15, 2002</col>
+    <col>
+      Added parameters of monitored objects.
+    </col>
+  </row>

 </table>
 
 </section>
 </table>
 
 </section>


@@ -382,9 +388,26 @@ However it may be obvious that both sides of the application can very
 well be installed on a single system.
 </para>
 <para>
 well be installed on a single system.
 </para>
 <para>

-When events<footnote>A signal can be the outcome of process that finished,
+To monitor a system, Gnucomo uses two kinds of input: <emph>event</emph> and
+<emph>parameters</emph>. Events occur on a system while it is running and reflect
+the transient behaviour of the system.
+Parameters reflect the current state of the system.
+The most obvious way to gather events from a monitored system is to read
+the system log files.
+Examples of events are IP packets that are rejected by the firewall or clients
+that access the http daemon.
+Parameters are obtained for example by reading configuration files or kernel
+data structures.
+Examples of parameters are the size and free space of a filesystem or
+the users that are listed in the password file.
+Both kinds of input are obtained actively or passively, i.e. by installing probe
+agents in the system which regularly aquire the system's parameters or passively
+by sending the output of programs to the Gnucomo server.
+</para>
+<para>
+When signals<footnote>A signal can be the outcome of process that finished,

 logbook entries, warnings from intrusion detection systems,
 logbook entries, warnings from intrusion detection systems,

-etc. </footnote> happen they will be stored in a file.
+etc. </footnote> arrive they will be stored in a file.

 When this file is delivered to a certain directory a daemon will detect
 this and start the transfer of the file. The file will be transferred
 to the central application or the client. This transfer will be triggered
 When this file is delivered to a certain directory a daemon will detect
 this and start the transfer of the file. The file will be transferred
 to the central application or the client. This transfer will be triggered


@@ -412,6 +435,8 @@ only two mechanisms will be supported:
 <para>
 
   <picture src="architecture.png" eps="architecture"/>
 <para>
 
   <picture src="architecture.png" eps="architecture"/>

+</para>
+<para>

        Illustration 1 Basic overview of the processes on the server.
 </para>
 
        Illustration 1 Basic overview of the processes on the server.
 </para>
 


@@ -474,10 +499,56 @@ processing of the data.
     action is taken in a certain amount of time.
   </item>
 </itemize>
     action is taken in a certain amount of time.
   </item>
 </itemize>

+
+<subsection>
+<heading>System Parameters</heading>
+
+<para>
+Gnucomo maintains the operational parameters of a monitored system for a
+number of reasons.
+The most important reason is to create notifications when somthing about a
+parameter changes while the parameter is not supposed to change.
+Such a change may be intended by the system administrator, e.g. when a
+package is upgraded, or there may be something wrong.
+In any case, you will want to know about a change in your system when it happens.
+Furthermore, a change history of a parameter's values will come in
+handy when you want to look back in time and figure out
+what happened in the past.
+Another usefull application of parameters concerns the maintenance of a 
+large number of similar systems.
+When the parameters of each system are reported regularly to Gnucomo,
+deviations from the 'standard' system configuration can be easily spotted.
+</para>
+<para>
+Some properties of parameters are supposed to change regularly.
+A changed value of such a property will of course not lead to any
+notification.
+On the other hand, the change history of these parameters may provide
+interesting information about the monitored system.
+This leads to the distiction between static and dynamic properties of parameters.
+The difference between dynamic and static properties manifests itself mainly
+in the change history of the parameter's property.
+Dynamic properties typically have a change record once a day or even a couple
+of times a day.
+Change records for static properties are usually months apart.
+</para>
+<para>
+The state of parameters is scanned or probed regularly on a client system
+and reported to the Gnucomo server.
+These reports can be created in a variety of ways.
+For example, filesystems are reported with 'df', installled packages with 'rpm -qa',
+users by reading /etc/passwd, etc.
+Many other probing methods may be implemented.
+Each report from a probe holds the current value of several parameters.
+Gnucomo will check each property of these parameters against the stored knwon value.
+If the property's value changed, the actual value in the database is updated
+and a record is added to the change history of the parameter.
+</para>
+</subsection>

 </section>
 
 <section>
 </section>
 
 <section>

-  <heading>Web interface.</heading>
+  <heading>Web interface</heading>

 
 <para>
 The web interface will used to interact with the user.
 
 <para>
 The web interface will used to interact with the user.


@@ -519,7 +590,6 @@ of the issue. How each priority will be dealt with is something that can
 be set per server. The priority mechanism is a simple system of five
 categories (can be more or less).
 </para>
 be set per server. The priority mechanism is a simple system of five
 categories (can be more or less).
 </para>

-<para/>

 </section>
 
 <section>
 </section>
 
 <section>


@@ -1566,6 +1636,67 @@ Since no data is delivered automatically a couple of sample records are shown he
 </subsection>
 
 <subsection>
 </subsection>
 
 <subsection>

+<heading>history</heading>
+<para>
+The history table records all changes to properties of parameters.
+</para>
+
+<subsubsection>
+<heading>The fields</heading>
+<para>
+The fields of the <emph>history</emph> table are listed below:
+</para>
+<table cpos='lllp{6cm}'>
+      <thead>
+        <col> Fieldname </col> <col> Fieldtype </col> <col> Size </col>
+        <col> Remarks </col>
+      </thead>
+      <row>
+        <col>paramid</col><col>bigint</col><col>8</col>
+        <col>The parameter to which this history belongs. Refers to the parameter table</col>
+      </row>
+      <row>
+        <col>modified</col><col>timestamp</col><col> </col>
+        <col>Time at which the property value or parameter changed</col>
+      </row>
+      <row>
+        <col>change_nature</col><col>enum</col><col> </col>
+        <col>Parameter created to destroyed; property value changed</col>
+      </row>
+      <row>
+        <col>changed_property</col><col>text</col><col> </col>
+        <col>Name of the parameter's property that changed.</col>
+      </row>
+      <row>
+        <col>new_value</col><col>text</col><col> </col>
+        <col>The new actual value of the property at the time of modification</col>
+      </row>
+      <row>
+        <col>remark</col><col>text</col><col> </col>
+        <col>A short explanation of why the property changed</col>
+      </row>
+</table>
+
+<para>
+Each time something about a parameter changes, this is recorded in the
+change history of the paraneter.
+When such a change happens, one of three things may occur to a parameter,
+as stated in the 'change_nature' field:
+
+<enumerate>
+<item>A new parameter is created.</item>
+<item>The value of one of the properties was altered.</item>
+<item>The parameter is removed.</item>
+</enumerate>
+
+When  a parameter is created or destroyed, the fields 'changed_property' and
+'new_value' are irrelevant.
+</para>
+
+</subsubsection>
+</subsection>
+
+<subsection>

   <heading>log &amp; log_adv. </heading>
 
 <para>
   <heading>log &amp; log_adv. </heading>
 
 <para>


@@ -2554,115 +2685,59 @@ left column and the data in the right column.
 </para>
 <table cpos='lp{6cm}'>
       <thead>
 </para>
 <table cpos='lp{6cm}'>
       <thead>

-        <col>
-          <para>Fieldname</para>
-        </col>
-        <col>
-          <para>Sample data</para>
-        </col>
+        <col> Fieldname </col>
+        <col> Sample data </col>

       </thead>
       <row>
       </thead>
       <row>

-        <col>
-          <para>Objectid</para>
-        </col>
-        <col>
-          <para>1</para>
-        </col>
+        <col> Objectid </col>
+        <col> 1 </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Objectname</para>
-        </col>
-        <col>
-          <para>webber.dewinter.com</para>
-        </col>
+        <col> Objectname </col>
+        <col> webber.dewinter.com </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Objectcode</para>
-        </col>
-        <col>
-          <para>7f0100</para>
-        </col>
+        <col> Objectcode </col>
+        <col> 7f0100 </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Scp_enabled</para>
-        </col>
-        <col>
-          <para>T</para>
-        </col>
+        <col> Scp_enabled </col>
+        <col> T </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Scp_inet</para>
-        </col>
-        <col>
-          <para>192.168.221.212</para>
-        </col>
+        <col> Scp_inet </col>
+        <col> 192.168.221.212 </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Mail_enabled</para>
-        </col>
-        <col>
-          <para>T</para>
-        </col>
+        <col> Mail_enabled </col>
+        <col> T </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Mail_from</para>
-        </col>
-        <col>
-          <para>
-            <reference href="mailto:gnucomo@maintenance.dewinter.com">gnucomo@maintenance.dewinter.com</reference>
-          </para>
-        </col>
+        <col> Mail_from </col>
+        <col> <reference href="mailto:gnucomo@maintenance.dewinter.com">gnucomo@maintenance.dewinter.com</reference> </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Sms_enabled</para>
-        </col>
-        <col>
-          <para>T</para>
-        </col>
+        <col> Sms_enabled </col>
+        <col> T </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Sms_number</para>
-        </col>
-        <col>
-          <para>06-XXXXXXXX</para>
-        </col>
+        <col> Sms_number </col>
+        <col> 06-XXXXXXXX </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Fax_enabled</para>
-        </col>
-        <col>
-          <para>T</para>
-        </col>
+        <col> Fax_enabled </col>
+        <col> T </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Fax_number</para>
-        </col>
-        <col>
-          <para>0318-XXXXXX</para>
-        </col>
+        <col> Fax_number </col>
+        <col> 0318-XXXXXX </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Object_description</para>
-        </col>
-        <col>
-          <para>19 inch 4 units, AMD-300 with two 27Gb disks (RAID-0), 256Mb memory</para>
-        </col>
+        <col> Object_description </col>
+        <col> 19 inch 4 units, AMD-300 with two 27Gb disks (RAID-0), 256Mb memory </col>

       </row>
       <row>
       </row>
       <row>

-        <col>
-          <para>Object_owner</para>
-        </col>
+        <col> Object_owner </col>

         <col>
           <para>Brenno de Winter</para>
           <para>De Winter Information Solutions</para>
         <col>
           <para>Brenno de Winter</para>
           <para>De Winter Information Solutions</para>


@@ -2673,23 +2748,19 @@ left column and the data in the right column.
         </col>
       </row>
       <row>
         </col>
       </row>
       <row>

-        <col>
-          <para>Physical_location</para>
-        </col>
+        <col> Physical_location </col>

         <col>
           <para>Internet Provider XYZ</para>
           <para>Your street here 38</para>
           <para>9999 XX YOUR CITY</para>
           <para>THE NETHERLANDS</para>
           <para>Phone: +31 XXX XXX XXX</para>
         <col>
           <para>Internet Provider XYZ</para>
           <para>Your street here 38</para>
           <para>9999 XX YOUR CITY</para>
           <para>THE NETHERLANDS</para>
           <para>Phone: +31 XXX XXX XXX</para>

-          <para/>
+          

           <para>Dataroom. System: Q7845</para>
         </col>
       </row>
       <row>
           <para>Dataroom. System: Q7845</para>
         </col>
       </row>
       <row>

-        <col>
-          <para>Remark</para>
-        </col>
+        <col> Remark </col>

         <col>
           <para>A replacement system is available at the office location. The following persons have been authorized to enter the data room at the ISP:</para>
           <para>* Arjen Baart</para>
         <col>
           <para>A replacement system is available at the office location. The following persons have been authorized to enter the data room at the ISP:</para>
           <para>* Arjen Baart</para>


@@ -3981,7 +4052,7 @@ The indices of the <emph>object_user</emph> table:
   <heading>The relationships.</heading>
 
 <para>
   <heading>The relationships.</heading>
 
 <para>

-Relationshiips with other tables:
+Relationships with other tables:

 </para>
 
 <table cpos='llp{8cm}'>
 </para>
 
 <table cpos='llp{8cm}'>


@@ -4027,6 +4098,79 @@ Relationshiips with other tables:
 </subsection>
 
 <subsection>
 </subsection>
 
 <subsection>

+<heading>parameter</heading>
+<para>
+The parameter table stores the operational parameters of a monitored object.
+The parameters of an object describe the object's resources and configurations.
+For each object, a large set of parameters can be defined. They range from
+anything like file systems and installed packages to the system's users.
+</para>
+
+<subsubsection>
+<heading>The fields</heading>
+<para>
+The fields of the <emph>parameter</emph> table are listed below:
+</para>
+<table cpos='lllp{6cm}'>
+      <thead>
+        <col> Fieldname </col> <col> Fieldtype </col> <col> Size </col>
+        <col> Remarks </col>
+      </thead>
+      <row>
+        <col>paramid</col><col>bigserial</col><col>8</col>
+        <col>Uniquely identifies the parameter. Used in property and history tables.</col>
+      </row>
+      <row>
+        <col>objectid</col><col>bigint</col><col>8</col>
+        <col>The object of which this is a parameter. Refers to the object table.</col>
+      </row>
+      <row>
+        <col>name</col><col>text</col><col> </col>
+        <col>Name of the parameter to identify the resource</col>
+      </row>
+      <row>
+        <col>class</col><col>text</col><col> </col>
+        <col>Similar parameters are in the same class</col>
+      </row>
+      <row>
+        <col>description</col><col>text</col><col> </col>
+        <col>A verbose description of the parameter</col>
+      </row>
+      
+</table>
+
+<para>
+The combination of objectid, name and class must be unique.
+</para>
+
+</subsubsection>
+<subsubsection>
+<heading>Sample data</heading>
+
+<para>
+The table below lists a few examples of parameters
+</para>
+<table cpos='lllll'>
+   <thead>
+      <col>paramid</col><col>objectid</col><col>name</col><col>class</col><col>description</col>
+   </thead>
+   <row>
+      <col>1</col><col>1</col><col>/</col><col>filesystem</col><col>The root filesystem</col>
+   </row>
+   <row>
+      <col>2</col><col>1</col><col>/home</col><col>filesystem</col><col>Our users' homedirs</col>
+   </row>
+   <row>
+      <col>3</col><col>1</col><col>glibc</col><col>package</col><col>The standard C library</col>
+   </row>
+   <row>
+      <col>4</col><col>1</col><col>arjen</col><col>user</col><col>Arjen Baart</col>
+   </row>
+</table>
+</subsubsection>
+</subsection>
+
+<subsection>

   <heading>priority</heading>
 
 <para>
   <heading>priority</heading>
 
 <para>


@@ -4218,6 +4362,86 @@ Relationships with other tables:
 </subsection>
 
 <subsection>
 </subsection>
 
 <subsection>

+<heading>property</heading>
+<para>
+The property table stores the actual values of the properties of
+operational parameters of a monitored object.
+</para>
+
+<subsubsection>
+<heading>The fields</heading>
+<para>
+The fields of the <emph>property</emph> table are listed below:
+</para>
+<table cpos='lllp{6cm}'>
+      <thead>
+        <col> Fieldname </col> <col> Fieldtype </col> <col> Size </col>
+        <col> Remarks </col>
+      </thead>
+      <row>
+        <col>paramid</col><col>bigint</col><col>8</col>
+        <col>The parameter to which this property belongs. Refers to the parameter table</col>
+      </row>
+      <row>
+        <col>name</col><col>text</col><col> </col>
+        <col>Name of the property</col>
+      </row>
+      <row>
+        <col>value</col><col>text</col><col> </col>
+        <col>The current value of the property</col>
+      </row>
+      <row>
+        <col>type</col><col>enum</col><col> </col>
+        <col>Dynamic or Static</col>
+      </row>
+      <row>
+        <col>minimum</col><col>float</col><col>8</col>
+        <col>The minimum value of the property (for numerical properties only)</col>
+      </row>
+      <row>
+        <col>maximum</col><col>float</col><col>8</col>
+        <col>The maximum value of the property (for numerical properties only)</col>
+      </row>
+      
+</table>
+
+</subsubsection>
+<subsubsection>
+<heading>Sample data</heading>
+
+<para>
+The table below lists a few examples of properties
+</para>
+<table cpos='llllll'>
+   <thead>
+      <col>paramid</col><col>name</col><col>value</col>
+      <col>type</col><col>minimum</col><col>maximum</col>
+   </thead>
+   <row>
+      <col>1</col><col>size</col><col>400000</col>
+      <col>STATIC</col><col>100000</col><col>999999999</col>
+   </row>
+   <row>
+      <col>1</col><col>used</col><col>200000</col>
+      <col>DYNAMIC</col><col>50000</col><col>400000</col>
+   </row>
+   <row>
+      <col>2</col><col>size</col><col>3000000</col>
+      <col>STATIC</col><col>100000</col><col>999999999</col>
+   </row>
+   <row>
+      <col>2</col><col>used</col><col>2000000</col>
+      <col>DYNAMIC</col><col>50000</col><col>2700000</col>
+   </row>
+   <row>
+      <col>3</col><col>version</col><col>2.2.5-39</col>
+      <col>STATIC</col><col>0</col><col>0</col>
+   </row>
+</table>
+</subsubsection>
+</subsection>
+
+<subsection>

   <heading>service</heading>
 
 <para>
   <heading>service</heading>
 
 <para>