Downtime Alert + PostgreSQL Integrations

Downtime Alert

Downtime Alert is a monitoring system that tracks the availability of PostgreSQL servers, and notifies the administrator when a server is down. Downtime Alert provides a web-based interface that lists available servers and their current status, as well as an email notification. Downtime Alert is written in Python and runs on Linux, and was developed by Brian Aker. It can also be used with MySQL and other databases.

PostgreSQL

PostgreSQL (also known as Postgres. is an open source database management system. It is a powerful, object-relational database system that supports a large part of the SQL standard, and many features that go beyond it. Postgres runs on multiple platforms, including several Unix variants (such as BSD/OS and AIX), Mac OS X, Microsoft Windows, and others. It includes most of the features found in other contemporary database systems. It includes a sophisticated query planner and optimizer, which can automatically choose an execution plan. The PostgreSQL query language is very similar to SQL, with an extended subset known as "SQL/PSM" intended for use with procedural languages such as Perl and PL/pgSQL.

Integration of Downtime Alert and PostgreSQL

To integrate Downtime Alert with PostgreSQL, you must first install Downtime Alert on the server hosting your database. A configuration file in /etc/downtime-alert/ contains the information required to make Downtime Alert monitor PostgreSQL for problems. You can add or change settings in this file so that Downtime Alert monitors your PostgreSQL installation. To set up Downtime Alert to monitor PostgreSQL, edit the fplowing lines in /etc/downtime-alert/config.py:

# Specify which database to monitor db_type = 'postgres' db_host = os.getenv('PGHOST'. db_port = os.getenv('PGPORT'. db_user = os.getenv('PGUSER'. db_password = os.getenv('PGPASSWORD'. db_name = os.getenv('PGDATABASE'. # Specify which database account to connect with db_account = os.getenv('PGUSER')

Since the settings specified here are environment variables, they will vary from one machine to another depending on how the machine is configured. Save the file, exit from your text editor, and type "sudo service downtime-alert restart" to start the process. If you have already started Downtime Alert, you must stop it before restarting it after making any changes to its configuration file. After restarting Downtime Alert, it will begin monitoring PostgreSQL for problems; if there are problems, it will send email alerts to the administrator(s. specified in the configuration file. It will also display a warning sign on the main page of its web interface to indicate that there are problems to be addressed.

Benefits of Integration of Downtime Alert and PostgreSQL

Downtime Alert provides benefits for admins who are trying to maintain a stable network environment for their users. An admin who uses Downtime Alert can receive alerts about problems with a database server much more easily than he would by manually checking every server regularly for problems. If Downtime Alert is configured correctly, an admin receives an alert about a problem with a database server within minutes of the problem arising. This reduces downtime at the server, which is vital to ensuring the availability of applications that rely on the server for data storage or processing.

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