[Q] - Graphite Dropping Metrics

[RJSOG]

Hi, i am a junior sys admin so please be comprehensive and kind ! I am building a monitoring infrastructure composed of :

Centreon v20.04 Graphite v1.2.0 Grafana v7.3.6 InfluxDB v1.8.3 I coded a python middleware beetween graphite and grafana allowing to execute sql queries on InfluxDB who is storing metrics status. My middleware is using graphite API to get the metrics, but 271metrics / 1,5K are ignored by the script because the value are set to "[ ]" or "None" ! I've tried to "play" with the "retentions" and the "xFilesFactor" parameters and resizing my metrics to fix the issue but he didn't worked !

So i have some questions :

At what interval Centreon_broker is sending metrics to graphite ? Can the broker send "None" values to Graphite ? What are the needed values in graphite parameters to not dropping centreon metrics ? Can there be a link beetween all the metrics that graphite is dropping (in my case the 271 metrics are comming from the same poller) Thanks a lot !

[deniszh]

Hi @Eli0ttD0NATIEN

Looks like these questions more relatred to Centreon itself instead of Graphite. Unfortunately, I know nothing about Centreon and can't help you with that. If you need InfluxDB compatible storage for Graphite you can use influxgraph but probably it's not what you're looking for.

[RJSOG]

Hi @deniszh, surely but in my case, graphite is dropping metrics from centreon, so i thinks both communities can answer ! I saw on the internet that Graphite Dropping Metrics is a commun issues so maybe its Graphite fault and not Centreon's

[deniszh]

Hi @Eli0ttD0NATIEN

I mean, I can't answer on questions above, because I don't know what Centreon even is. I.e:

At what interval Centreon_broker is sending metrics to graphite ?

Probably, Centreon support knows.

Can the broker send "None" values to Graphite ?

Probably, Centreon support knows.

What are the needed values in graphite parameters to not dropping centreon metrics ?

Probably, Centreon support knows. Graphite is not dropping metrics usually, except case when it's overloaded. And overloading it by 217 metrics is not very probable...

[deniszh]

My middleware is using graphite API to get the metrics, but 271metrics / 1,5K are ignored by the script because the value are set to "[ ]" or "None" !

Which exact values do you mean in this case? Metrics values? Graphite stores only numeric values, so, it can's store metric with non-numeric value - that's probably the reason it's dropped.

[RJSOG]

Centreon is a montioring services, the metrics value send by Centreon can't be Null, Carbon are setting them to None that's why i'm a little "blocked" and i am assuming this is a Graphite issue and not centreon's...