LibreNMS - snmp extend check postgres

check_postgres.pl

Get the script:

wget https://github.com/bucardo/check_postgres/archive/master.zip

Unzip and copy it where you need. Make it executable.

LibreNMS script

wget https://github.com/librenms/librenms-agent/raw/master/snmp/postgres -O /etc/snmp/postgres

In case of bug on the user/service, adapt $cpg --dbservice=$DBuser --action dbstats | awk -F ' ' \'

Verify the path to check_postgres.pl in /etc/snmp/postgres is correct.

pg_service

Modify/create and adapt to your configuration /etc/postgresql-common/pg_service.conf:

[yourServiceName]
host=127.0.0.1
port=5432
user=your_adapted_user
password=your_password
dbname=your_db_name
sslmode=require

Restart the service.

.pgpass

The file .pgpass in a user's home directory or the file referenced by PGPASSFILE can contain passwords to be used if the connection requires a password (and no password has been specified otherwise).

This file should contain lines of the following format:

hostname:port:database:username:password

SNMP Configuration

Adapt your /etc/snmp/snmpd.conf with:

extend postgres /etc/snmp/postgres

Restart the service.

Check Command

Adapt the user and path to your configuration:

sudo -u Debian-snmp /etc/snmp/postgres

Sources

• https://docs.librenms.org/Extensions/Applications/#postgres
• https://github.com/bucardo/check_postgres
• https://bucardo.org/check_postgres/
• https://bucardo.org/check_postgres/check_postgres.pl.html
• https://www.digitalocean.com/community/tutorials/how-to-monitor-your-managed-postgresql-database-using-nagios-core-on-ubuntu-18-04
• https://docs.postgresql.fr/8.1/libpq-pgpass.html

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