check_sql

check_sql

http://exchange.nagios.org/directory/Plugins/Databases/Others/check_sql/details

check_sql is a nagios plugin to check SQL queries using perl DBI.

check_sql is database agnostic and the support depends only on what DBI can support.

I've personally tested check_sql with the following:

• MySQL
• PostgreSQL
• SQL Server

It should support also:

• Oracle databases
• SQLite
• CSV
• Many other databases I've never used :)

check_sql is based on work done by Nagios Plugin Development Team and Thomas Guyot-Sionnest, I've decided to inherit it and add generic DBI support. I promise to do my best to maintain it...

Features

check_sql features the following:

• Support any database supported by DBI
• Run any query you'd like
• Compare values returned in queries
• Regular expression matching on returned queries
• Return warning or critical based on thresholds (numeric results only)

Simple Usage

./check_sql -v -s -d DSN -U USERNAME -P PASSWORD -q "select count(*) from some_table"

DSN is the DBI connection string to connect to the database. Some examples:

# mysql database at localhost:3306
DBI:mysql:database=users;host=localhost;port=3306

# postgresql database at localhost:5432
DBI:Pg:dbname=homes;host=localhost;port=5432

# SQL server at cakes.microsoft.com:1433
DBI:Sybase:server=cakes.microsoft.com:1433

Refer to the specific tutorial to find the right DSN for your DB.

Expecting Results

Expecting "Awesome" at the result (-e):

./check_sql -v -s -d DSN -U USERNAME -P PASSWORD -e "Awesome" -q "select 'Awesome'"

Expect a regular expression (-r and -e):

./check_sql -v -s -d DSN -U USERNAME -P PASSWORD -r -e "Awesome" -q "select 'Awesome yiiiiiiiiiiha'"

Threshold results

Show a warning if larger than 10 (-W 10) and critical if larger than 100 (-C 100):

# will show an OK
./check_sql -v -s -d DSN -U USERNAME -P PASSWORD -W 10 -C 100 -q "select 9"
# will show a warning
./check_sql -v -s -d DSN -U USERNAME -P PASSWORD -W 10 -C 100 -q "select 11"
# will show an error
./check_sql -v -s -d DSN -U USERNAME -P PASSWORD -W 10 -C 100 -q "select 101"

Plugin Specifics

MySQL

Things you'll need:

• perl DBD::MySQL

Example:

./check_sql -v -s -d "DBI:mysql:database=DB_NAME;host=DB_HOSTNAME;port=DB_PORT" -U USERNAME -P PASSWORD -q "select count(*) from some_table"

PostgreSQL

Things you'll need:

• perl DBD::Pg

Example:

./check_sql -v -s -d "DBI:Pg:dbname=DB_NAME" -U USERNAME -P PASSWORD -q "select count(*) from some_table"

SQL Server

Things you'll need:

• perl DBD::Sybase
• FreeTDS (compiled with --with-tdsver=8.0)

Example:

./check_sql -v -s -d DBI:Sybase:server=SERVER_NAME:PORT -U DB_USERNAME -P DB_PASSWORD -q "select count(*) from some_table"

Limitations

Please open me issues if you find any. I promise to address them as soon as I can.