Lag summary per topic [question]

Hello

Currently when querying for lag i receive information in form:
"status" -> "partitions" -> "partition topic".

When topic is located on multiple partitions i need to summarize (correct me if i am wrong) current_lag from all partition containing particular topic.
The issue that when gathering data using collectd topic is part of partition hash:

`{
"topic": "sometopic",
"partition": 1,
"owner": "",
"status": "OK",
"start": {
"offset": 25836605,
"timestamp": 1519389278989,
"lag": 0
},
"end": {
"offset": 25836701799,
"timestamp": 1519389368055,
"lag": 0
},
"current_lag": 190,
"complete": 1
},
`
making it impossible to sum current_lag value from only single topic.

Am i missing a simple way of getting summary lag per topic using ELK + collectd?

No source file or test is named. Start by reproducing the partition-level lag response described in the issue and checking how Burrow output is consumed by collectd and ELK. Done should be a confirmed answer about topic-level aggregation, with any required implementation or usage guidance explicitly identified.

Written by the indexing model from the issue text.