As I mentioned yesterday here, there is an issue with current scheme of
metrics.
With current scheme you cannot do simple math like
> SELECT num_osd - num_osd_up FROM "ceph_cluster_stats"
Instead you will need query like
> SELECT (SELECT last("value") FROM "ceph_cluster_stats" WHERE
"type_instance" = 'num_osd') - (SELECT last("value") FROM
"ceph_cluster_stats" WHERE "type_instance" = 'num_osd_up')
which is not supported by InfluxDB.
I know this type of queries works perfectly in prometheus or SQL world,
but AFAIK you unfortunately cannot easily combine multiple series in
InfluxDB.
To Mario's issue with alerting - maybe you can try to use kapacitor for
alerting purposes. I have no direct experiences with it, but it should
be easily controlled via chronograf and could solve your issue.
M.
On 12/11/19 4:58 AM, Konstantin Shalygin wrote:
>
>> But it is very difficult/complicated to make simple queries because, for
>> example I have osd up and osd total but not osd down metric.
>>
> To determine how much osds down you don't need special metric, because
> you already
>
> have osd_up and osd_in metrics. Just use math.
>
>
>
>
> k
>
>
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--
Miroslav Kalina
Systems developement specialist
miroslav.kal...@livesport.eu
+420 773 071 848
Livesport s.r.o.
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