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SomethingDigital_InfluxDb

A set of tools that are useful when connecting Magento to InfluxDb

Features

  • "InfluxDB" section under the "Advanced" tab for configuring connection
  • SomethingDigital_InfluxDb_Model_Api class for communicating with InfluxDB
  • SomethingDigital_InfluxDb_Model_MeasurementInterface interface for creating measurements
  • Measurements in app/code/community/SomethingDigital/InfluxDb/Model/Measurement
  • SomethingDigital_Shell_Influxdb script for executing measurement groups
  • Send a customer response header (Sd-Influxdb-Route) with routing information

Sending Measurements

The Magento cron has a bad habit of getting stuck. In fact, it's one of the most important things that you should be monitoring! As such we don't rely on it delivery of measurements to InfluxDb. Instead, we add additional crontab entries to execute specific measurement groups via shell/sd_influxdb.php. For example...

crontab

* * * * * php /var/www/html/shell/sd_influxdb.php --group one_minute

local.xml

<config>
    <sd_influxdb>
        <groups>
            <one_minute>
                <inventory>sd_influxdb/measurement_inventory</inventory>
            </one_minute>
        </groups>
    </sd_influxdb>
</config>

The send method will be called on each model specified under the measurement group. In send you can get the data you need and send it to InfluxDB using SomethingDigital_InfluxDb_Model_Api. See the measurements in app/code/community/SomethingDigital/InfluxDb/Model/Measurement for reference.

You can add additional groups and add additional measurements to groups as needed.

Sending Routing info in custom response header

Routing information for a given request can be sent in a response header. A common use case for this would be to see response codes counts on a route-by-route basis. A new Apache CustomLog format can be used to save the response headers to the log files.

Turning on the custom header

local.xml

<config>
    <sd_influxdb>
        <route_response_headers>
            <enabled>1</enabled>
        </route_response_headers>
    </sd_influxdb>
</config>

In order to add a response headers to full page cache hits SomethingDigital_InfluxDb_Model_RequestProcessor also needs to be registered as a request processor and must go last.

enterprise.xml

<config>
    <global>
        <cache>
            <request_processors>
                <ee>Enterprise_PageCache_Model_Processor</ee>
                <zz_sd_influxdb>SomethingDigital_InfluxDb_Model_RequestProcessor</zz_sd_influxdb>
            </request_processors>
        </cache>
    </global>
</config>

Compatibility with custom request processors

If, for some reason, your site is not using Enterprise_PageCache_Model_Processor as the processor for FPC, you'll need to declare that processor as the metadata_source.

local.xml

<config>
    <sd_influxdb>
        <route_response_headers>
            <enabled>1</enabled>
            <metadata_source>Elastera_EnterprisePageCacheSSL_Model_Processor</metadata_source>
        </route_response_headers>
    </sd_influxdb>
</config>

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Base module for sending data for InfluxDB.

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