https://github.com/debugloop/moodledb_exporter

Minimal Prometheus Metrics for Moodle Databases
https://github.com/debugloop/moodledb_exporter

Last synced: about 1 month ago
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Minimal Prometheus Metrics for Moodle Databases

• Host: GitHub
• URL: https://github.com/debugloop/moodledb_exporter
• Owner: debugloop
• Created: 2020-04-22T10:47:12.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2021-01-11T12:38:15.000Z (almost 4 years ago)
• Last Synced: 2024-06-20T09:23:33.783Z (6 months ago)
• Language: Go
• Size: 4.88 KB
• Stars: 1
• Watchers: 4
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
This is a very simple exporter that connects to a local MySQL database on

scrape. It then looks for all databases matching the prefix filter which are

supposed to contain the typical Moodle tables. From these, a count of

non-deleted users is exported for each database.

It is very simple, but it works well enough. It could also serve as a basis for

other SQL query based exporters, if necessary.

| Option   | Explanation |

|----------|-------------|

| `web.listen-address` | same as every other exporter out there, default is port `9720` |

| `web.telemetry-path` | same as every other exporter out there, default is `/metrics`  |

| `mysql.prefix`       | the prefix used to filter databases, as not every database contains a Moodle. We use a `db_` prefix to our `db_customername` scheme, so thats the default |

Further, you'll have to set `DATA_SOURCE_NAME` to some [MySQL DSN

spec](https://github.com/go-sql-driver/mysql#dsn-data-source-name). You'll

likely use something like this invocation (SystemD Unit Sytnax) in the end:

```

Environment="DATA_SOURCE_NAME=exporter:S0meS3curePass@(localhost:3306)/"

ExecStart=/opt/moodledb_exporter/moodledb_exporter --mysql.prefix="customer_"

```

The output/the metrics will look like:

```

# HELP moodle_users_total Number of users found in a MoodleDB

# TYPE moodle_users_total gauge

moodle_users_total{dbname="customer_1"} 191

moodle_users_total{dbname="customer_2"} 10

...

```

Along with the usual `promhttp` stuff.