# Zabbix PostgreSQL Partitioning Monitoring

This template relies on Zabbix Agent 2 and its PostgreSQL plugin. It allows you to monitor the health of your partitioned PostgreSQL database tables. It uses a single master item to pull all metrics in bulk over a single database connection, dynamically distributing the numbers to Zabbix using Dependent Items.
There are three item prototypes:
1. Future Partitions Buffer: Number of future partitions to be created
2. Total Size Bytes: Total size of the partitioned table in bytes
3. Time Since Last Maintenance: Time since the last maintenance script was run
They allows to monitor all the critical metrics and also they do have a triggers, which will create a problem in case something is wrong with the partitioning. 

### Setup
1. Copy the SQL file (`template/partitions.get_all.sql`) into a directory on your Agent machine. E.g., `/etc/zabbix/zabbix_agent2.d/postgresql/`.
2. Install  zabbix-agent2-plugin-postgresql package.
3. Open your Plugin configuration file `/etc/zabbix/zabbix_agent2.d/plugins.d/postgresql.conf` and add these lines to establish your custom query module AND a secure named session (e.g., `AWS_RDS`). Adjust the parameters to match your environment. You can use uri instead of named session if you want. In this case you will need to modify the item keys to use the correct parameters.
   ```ini
   # 1. Enable Loadable Custom Queries (Mandatory in Zabbix 7.4+)
   Plugins.PostgreSQL.CustomQueriesPath=/etc/zabbix/zabbix_agent2.d/postgresql/
   Plugins.PostgreSQL.CustomQueriesEnabled=true

   # 2. Establish a Secure Backend Session
   Plugins.PostgreSQL.Sessions.AWS_RDS.Uri=tcp://your-cluster-endpoint.amazonaws.com:5432
   Plugins.PostgreSQL.Sessions.AWS_RDS.User=zabbix
   Plugins.PostgreSQL.Sessions.AWS_RDS.Password=<YOUR_ZABBIX_PASSWORD>
   Plugins.PostgreSQL.Sessions.AWS_RDS.TLSConnect=verify_full
   Plugins.PostgreSQL.Sessions.AWS_RDS.TLSCAFile=/etc/zabbix/global-bundle.pem
   ```
4. Restart your agent to apply the changes: 
   ```bash
   systemctl restart zabbix-agent2
   ```
5. Import the `zbx_pg_partitions_monitor_agent2.yaml` template into your Zabbix.
6. Link the template to your Host, navigate to its "Macros" tab, and define the needed macros (in this case it's just named session):
   * `{$PG.CONNSTRING.AGENT2}`: `AWS_RDS`
