build(repo): restructure repository into postgresql subdirectory with template and script
This commit is contained in:
Maksym Buz
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postgresql/template/README.md
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32
postgresql/template/README.md
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# Zabbix PostgreSQL Partitioning Monitoring
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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.
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There are three item prototypes:
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1. Future Partitions Buffer: Number of future partitions to be created
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2. Total Size Bytes: Total size of the partitioned table in bytes
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3. Time Since Last Maintenance: Time since the last maintenance script was run
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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.
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### Setup
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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/`.
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2. Install zabbix-agent2-plugin-postgresql package.
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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.
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```ini
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# 1. Enable Loadable Custom Queries (Mandatory in Zabbix 7.4+)
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Plugins.PostgreSQL.CustomQueriesPath=/etc/zabbix/zabbix_agent2.d/postgresql/
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Plugins.PostgreSQL.CustomQueriesEnabled=true
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# 2. Establish a Secure Backend Session
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Plugins.PostgreSQL.Sessions.AWS_RDS.Uri=tcp://your-cluster-endpoint.amazonaws.com:5432
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Plugins.PostgreSQL.Sessions.AWS_RDS.User=zabbix
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Plugins.PostgreSQL.Sessions.AWS_RDS.Password=<YOUR_ZABBIX_PASSWORD>
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Plugins.PostgreSQL.Sessions.AWS_RDS.TLSConnect=verify_full
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Plugins.PostgreSQL.Sessions.AWS_RDS.TLSCAFile=/etc/zabbix/global-bundle.pem
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```
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4. Restart your agent to apply the changes:
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```bash
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systemctl restart zabbix-agent2
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```
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5. Import the `zbx_pg_partitions_monitor_agent2.yaml` template into your Zabbix.
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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):
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* `{$PG.CONNSTRING.AGENT2}`: `AWS_RDS`
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6
postgresql/template/partitions.get_all.sql
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postgresql/template/partitions.get_all.sql
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SELECT
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table_name,
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future_partitions,
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total_size_bytes,
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EXTRACT(EPOCH FROM (now() - last_updated)) AS age_seconds
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FROM partitions.monitoring;
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105
postgresql/template/zbx_pg_partitions_monitor_agent2.yaml
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postgresql/template/zbx_pg_partitions_monitor_agent2.yaml
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zabbix_export:
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version: '7.0'
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template_groups:
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- uuid: 748ad4d098d447d492bb935c907f652f
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name: Templates/Databases
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templates:
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- uuid: a1d5f8c3b2e44a7c9d6b1f2e8a3c5b4d
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template: 'PostgreSQL Partitioning by Zabbix Agent 2'
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name: 'PostgreSQL Partitioning by Zabbix Agent 2'
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description: 'Monitors the custom partitions.monitoring view via the native Zabbix Agent 2 PostgreSQL plugin. Using a single master to minimize the DB connections and load.'
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vendor:
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name: Zabbix Support
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version: 7.0-0
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groups:
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- name: Templates/Databases
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items:
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- uuid: b8c7d6e5f4a34b2c8d2e3f4a5b6c7d8e
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name: 'PostgreSQL: Get Partitioning Data'
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key: 'pgsql.custom.query["{$PG.CONNSTRING.AGENT2}",,,"{$PG.DBNAME}","partitions.get_all"]'
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history: '0'
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value_type: TEXT
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description: 'Master item that queries all partition statistics in a single bulk JSON sequence.'
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tags:
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- tag: component
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value: raw
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discovery_rules:
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- uuid: b7c2a5d8f1e44b9c8a3f6d2e1c5b4a7d
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name: 'Partitioned Tables Discovery'
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type: DEPENDENT
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key: db.partitions.discovery.dependent
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item_prototypes:
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- uuid: f1a2b3c4d5e64f7a9b8c7d6e5f4a3b2c
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name: '{#TABLE_NAME}: Time Since Last Maintenance'
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type: DEPENDENT
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key: 'db.partitions.age["{#TABLE_NAME}"]'
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units: s
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preprocessing:
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- type: JSONPATH
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parameters:
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- '$.[?(@.table_name == "{#TABLE_NAME}")].age_seconds.first()'
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master_item:
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key: 'pgsql.custom.query["{$PG.CONNSTRING.AGENT2}",,,"{$PG.DBNAME}","partitions.get_all"]'
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tags:
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- tag: metric
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value: age
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- tag: table
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value: '{#TABLE_NAME}'
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trigger_prototypes:
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- uuid: a9b8c7d6e5f44a3b8c1d2e3f4a5b6c7d
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expression: 'last(/PostgreSQL Partitioning by Zabbix Agent 2/db.partitions.age["{#TABLE_NAME}"])>{$PARTITIONS.AGE}'
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name: 'Table {#TABLE_NAME}: Maintenance script has not run successfully in over 48 hours'
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priority: WARNING
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- uuid: c4b9e2a5f1d84c7a9f3b6d1e5a2c8b4d
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name: '{#TABLE_NAME}: Future Partitions Buffer'
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type: DEPENDENT
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key: 'db.partitions.future["{#TABLE_NAME}"]'
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preprocessing:
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- type: JSONPATH
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parameters:
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- '$.[?(@.table_name == "{#TABLE_NAME}")].future_partitions.first()'
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master_item:
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key: 'pgsql.custom.query["{$PG.CONNSTRING.AGENT2}",,,"{$PG.DBNAME}","partitions.get_all"]'
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tags:
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- tag: metric
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value: partitions
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- tag: table
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value: '{#TABLE_NAME}'
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trigger_prototypes:
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- uuid: d6e3a5c8b2f14d9e8a7b6c5d4e3f2a1b
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expression: 'last(/PostgreSQL Partitioning by Zabbix Agent 2/db.partitions.future["{#TABLE_NAME}"])<{$PARTITIONS.LOW}'
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name: 'Table {#TABLE_NAME}: Future partitions buffer is critically low (< 2)'
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priority: HIGH
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- uuid: e8f2a1b3c4d54e6f9a8b7c6d5e4f3a2b
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name: '{#TABLE_NAME}: Total Size Bytes'
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type: DEPENDENT
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key: 'db.partitions.size["{#TABLE_NAME}"]'
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units: B
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preprocessing:
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- type: JSONPATH
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parameters:
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- '$.[?(@.table_name == "{#TABLE_NAME}")].total_size_bytes.first()'
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master_item:
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key: 'pgsql.custom.query["{$PG.CONNSTRING.AGENT2}",,,"{$PG.DBNAME}","partitions.get_all"]'
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tags:
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- tag: metric
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value: size
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- tag: table
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value: '{#TABLE_NAME}'
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master_item:
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key: 'pgsql.custom.query["{$PG.CONNSTRING.AGENT2}",,,"{$PG.DBNAME}","partitions.get_all"]'
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lld_macro_paths:
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- lld_macro: '{#TABLE_NAME}'
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path: $.table_name
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macros:
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- macro: '{$PARTITIONS.AGE}'
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value: 24h
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description: 'The maximum period during which no new partitions may be created'
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- macro: '{$PARTITIONS.LOW}'
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value: '2'
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description: 'The minimum number of partitions that must exist in the future'
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- macro: '{$PG.CONNSTRING.AGENT2}'
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value: AWS_RDS
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description: 'Session name or URI of the PostgreSQL instance'
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- macro: '{$PG.DBNAME}'
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value: zabbix
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