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---------- NDO README ---------- *************** !! IMPORTANT !! *************** This code is still an alpha/beta quality, so expect problems if you intend to use it. Make sure that you aren't using it with your only production installation of Nagios, or it could take down the Nagios process if the NDOMOD module segfaults. Nagios could segfault silently and you might never know that Nagios crashed... **************** ABOUT THIS ADDON **************** The NDOUTILS (Nagios Data Output Utils) addon allows you to move status and event information from Nagios to a database for later retrieval and processing. This addon consists of several parts. Here are the most interesting ones... 1. The NDOMOD event broker module. This module is intended to be loaded by the Nagios process at runtime. Its only role is to dump all events and data from Nagios to a TCP socket or a regular file or Unix domain socket on the local filesystem somewhere. If you want realtime transfer of data to MySQL, dump the data to a TCP or Unix domain socket. If you want delayed transfer of data into MySQL (i.e. you need to transfer the data to another host first), dump the data to a regular file. 2. The NDO2DB daemon. This standalone daemon reads input (that was produced by the NDOMOD broker module) from a TCP or Unix domain socket, parses that data, and then dumps it into one or more MySQL databases. The daemon is capable of handling multiple client connections simultaneously, so you can have multiple instances of the NDOMOD module writing to the same TCP or Unix domain socket at the same time. 3. The FILE2SOCK utility. This simple utility reads data from a standard file and dumps it to either a TCP or a Unix domain socket. This is useful if you are having the NDOMOD module write to a standard file that you later want to send to the NDO2DB daemon. If the module and the daemon are running on different machines, you can periodically use SSH to transfer the file from the monitoring machine to the machine running the NDO2DB daemon, and then use the FILE2SOCK utility to send the contents of that file to the TCP socket or Unix domain socket that the NDO2DB daemon is reading. 4. The LOG2NDO utility. This utility is used for importing historical log archives from NetSaint and Nagios and sending them to the NDO2DB daemon. It takes a single log file as its input and can output data to either a TCP socket, a Unix domain socket or standard output. ********************** COMPILING INSTRUCTIONS ********************** Use the following commands to compile the NDO broker module, NDO2DB daemon, and additional utilities: ./configure make If the configure script is unable to locate your MySQL or PostgreSQL development libraries, you may need to help it out by using the --with-mysql-lib or --with-pgsql-lib options. Here's an example: ./configure --with-mysql-lib=/usr/lib/mysql ***************************** INITIALIZING THE SQL DATABASE ***************************** Before you start using the NDO utilities, you should create the database where you will be storing all Nagios-related information. NOTE: As of 02/12/2006, only MySQL databases are supported. PostgreSQL support will likely be added in the future. 1. Create a database for storing the data (e.g. 'nagios') 2. Create a username/password that has at least the following privileges for the database: SELECT, INSERT, UPDATE, DELETE 3. Run the DB installation script in the db/ subdirectory of the NDO distribution to create the necessary tables in the database. cd db ./installdb 4. Make sure the database name, prefix, and username/password you just created and setup match the variable specified in the NDO2DB config file (see below). *********************************** INSTALLING THE NDOMOD BROKER MODULE *********************************** NOTE: There are two different versions of the NDOMOD module that get compiled, so make sure you use the module that matches the version of Nagios you are running, and adjust the directions given below to fit the name of the module version you're using. ndomod-2x.o = NDOMOD module for Nagios 2.x ndomod-3x.o = NDOMOD module for Nagios 3.x (unstable) 1. Copy the compiled NDOMOD module to your Nagios installation: cp src/ndomod-2x.o /usr/local/nagios/bin/ndomod.o The command above assumes that you are using Nagios 2.x, and thus are installing the 2.x version of the NDOMOD module. 2. Copy the sample NDOMOD config file to your Nagios installation after modifying it to suit your needs: cp config/ndomod.cfg /usr/local/nagios/etc 3. Add a line similiar to the following to the *main* Nagios config file (usually /usr/local/nagios/etc/nagios.cfg): broker_module=/usr/local/nagios/bin/ndomod.o config_file=/usr/local/nagios/etc/ndomod.cfg The config directive above will cause Nagios to load the NDOMOD event broker the next time it starts. Of course, this requres that you compiled Nagios with support for the event broker in the first place. :-) 4. Make sure you have a line similar to the following in the *main* Nagios config file (usually /usr/local/nagios/etc/nagios.cfg): event_broker_options=-1 That directive will cause the Nagios daemon to send data to the NDOMOD module. Without that option, NDOMOD won't get any information. **************************** INSTALLING THE NDO2DB DAEMON **************************** NOTE: There are two different versions of the NDO2DB daemon that get compiled, so make sure you use the daemon that matches the version of Nagios you are running, and adjust the directions given below to fit the name of the daemon you're using. ndo2db-2x.o = NDO2DB daemon for Nagios 2.x ndo2db-3x.o = NDO2DB daemon for Nagios 3.x 1. Copy the compiled NDO2DB daemon to your Nagios installation: cp src/ndo2db-2x /usr/local/nagios/bin/ndo2db The command above assumes that you are using Nagios 2.x, and thus are installing the 2.x version of the NDO2DB daemon. 2. Copy the sample NDO2DB config file to your Nagios installation after modifying it to suit your needs (pay attention to the DB config settings). cp config/ndo2db.cfg /usr/local/nagios/etc 3. Start the daemon running! An init script will be developed soon... /usr/local/nagios/bin/ndo2db -c /usr/local/nagios/etc/ndo2db.cfg
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