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Basic Management eXtensions for Apache
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mod_bmx Monitoring Module for Apache Copyright (c) 2007 Codemass, Inc. Copyright (c) 2007 Hyperic, Inc. All rights reserved. See the LICENSE.txt file distributed with this work for additional information regarding copyright ownership. ===================================================================== Please see the INSTALL.txt file for installation and configuration details. You will also find source code documentation in HTML form (generated by doxygen) within the docs/html directory. Overview: --------- BMX is a framework for Apache to provide internal runtime statistics and configuration information to interested remote agents. It can be used to report on the internal workings and status of Apache at runtime, such as performance metrics and current capacity. BMX comes with a number of Apache Modules, as well as an API for creating new BMX plugins. Provided Modules: ----------------- Core Module - mod_bmx The mod_bmx module is the core BMX module and must be loaded in order to support any BMX plugins. It provides base functionality for satisfying BMX queries. BMX Plugins: mod_bmx_status The mod_bmx_status module provides information similar to mod_status, such as runtime statistics about the overall health of the Apache server and its children. mod_bmx_vhost The mod_bmx_vhost module provides information on the virtual hosts running within Apache, such as per-page counts, byte counts, error counts, etc. Data is stored and collected for each vhost, and also across 3 different time ranges, including the time since Apache was last started, the time since Apache was last _restarted_, and also for all time. To clear the data that mod_bmx_vhost maintains, simply remove the DBM file and then restart Apache. See the INSTALL.txt document for details. Example BMX Plugins: mod_bmx_example The mod_bmx_example module is an example BMX plugin that shows various ways to satisfy BMX queries and various response data types. API Documentation: ------------------ The BMX Plugin API provides a querying mechanism and a response mechanism. The query mechanism allows plugins to decide at runtime if they would like to respond to a particular BMX query. The response mechanism provides a way for plugins to return data to a querying client without having to specify the transport mechanism. Terms: BMX Plugin An BMX Plugin is an Apache Module that depends on the presence of the mod_bmx module, and provides some specialized reporting of internal Apache metrics and information by returning one or more BMX Beans in response to an BMX Query. BMX Query An BMX Query is a request for information from one or more BMX Beans. There are three BMX Query types: - Request for All Beans For example, "*:*" - Request for a Specific Bean For example, "mod_bmx_vhost:*" - Request for a Bean with specific Bean Properties For example: "mod_bmx_vhost:ServerName=www.example.com" "mod_bmx_vhost:Port=80,ServerName=www.example.com" BMX Objectname An BMX Objectname is the name of an BMX Bean and a set of BMX Objectname Properties. When represented as a string, the name is followed by a colon followed by a comma-separated set of the Key=Value pairs from the BMX Properties. BMX Objectname Properties A set of Key-Value pairs that are used to differentiate between beans that have the same name. BMX Bean The base container of data metrics, and the smallest unit of data that can be requested in an BMX Query. Beans contain the BMX Objectname (with Properties) and a set of Bean Properties. BMX Bean Properties BMX Bean Properties are individual data keys and values. The keys are simple string names, and the values can represent any data that an BMX Plugin wishes to report about the internal metrics of Apache. The BMX API provides a number of portable data types, and also provides a way for developers to add their own data types. Supported Bean Types (mostly portable APR types): NULL A key without a value. boolean A simple 'true' or 'false'. byte A single byte (0-255). apr_int16 A signed 16-bit short. apr_uint16 An unsigned 16-bit short. apr_int32 A signed 32-bit integer. apr_uint32 An unsigned 32-bit integer. apr_int64 A signed 64-bit integer. apr_uint64 An unsigned 64-bit integer. float A native floating point. double A native double floating point. string A character string, null terminated. other A user-defined data type. $Id: README.txt,v 1.5 2007/11/05 22:15:44 aaron Exp $
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