crunchy-collect
The crunchy-collect container provides real time metrics about the PostgreSQL database via an API. These metrics are scraped and stored by a Prometheus time-series database and are then graphed and visualized through the open source data visualizer Grafana.
The crunchy-collect container uses pgMonitor for advanced metric collection.
It is required that the crunchy-postgres container has the PGMONITOR_PASSWORD environment
variable to create the appropriate user (ccp_monitoring) to collect metrics.
Custom queries to collect metrics can be specified by the user. By mounting a queries.yml file to /conf on the container, additional metrics can be specified for the API to collect. For an example of a queries.yml file, see here
Packages
The crunchy-collect Docker image contains the following packages (versions vary depending on PostgreSQL version):
- PostgreSQL (11.5, 10.10, 9.6.15 and 9.5.19)
- CentOS7 - publicly available
- RHEL7 - customers only
- PostgreSQL Exporter
Environment Variables
Required
| Name | Default | Description |
|---|---|---|
| COLLECT_PG_PASSWORD | none | Provides the password needed to generate the PostgreSQL URL required by the PostgreSQL Exporter to connect to a PG database. Should typically match the PGMONITOR_PASSWORD value set in the crunchy-postgres container. |
Optional
| Name | Default | Description |
|---|---|---|
| COLLECT_PG_USER | ccp_monitoring | Provides the username needed to generate the PostgreSQL URL required by the PostgreSQL Exporter to connect to a PG database. Should typically be ccp_monitoring per the crunchy-postgres container specification (see environment varaible PGMONITOR_PASSWORD). |
| COLLECT_PG_HOST | 127.0.0.1 | Provides the host needed to generate the PostgreSQL URL required by the PostgreSQL Exporter to connect to a PG database |
| COLLECT_PG_PORT | 5432 | Provides the port needed to generate the PostgreSQL URL required by the PostgreSQL Exporter to connect to a PG database |
| COLLECT_PG_DATABASE | postgres | Provides the name of the database used to generate the PostgreSQL URL required by the PostgreSQL Exporter to connect to a PG database |
| DATA_SOURCE_NAME | None | Explicitly defines the URL for connecting to the PostgreSQL database (must be in the form of postgresql://). If provided, overrides all other settings provided to generate the connection URL. |
| CRUNCHY_DEBUG | FALSE | Set this to true to enable debugging in logs. Note: this mode can reveal secrets in logs. |
| POSTGRES_EXPORTER_PORT | 9187 | Set the postgres-exporter port to listen on for web interface and telemetry. |
Volumes
| Name | Description |
|---|---|
| /collect-pguser | Volume containing PG credentials stored in username and password files (e.g. mounted using a Kubernetes secret) |