How to query Multiple Metric with PromQL

[Mạnh Nguyễn Tiến]

I have many Query Request using PromQL like:

- Collect disk read rate: sum by (instance) (irate(node_disk_read_bytes_total[2m])) / 1024 / 1024

- Collect CPU Available:  (avg by(instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100)

If just with metrics, I can do it using operator "|": 

http://Prometheus_IP_Address/api/v1/query?query={__name__=~”node_memory_Buffers_bytes|node_cpu_seconds_total”,instance=”Node_Exporter_IPAddress”}

But with PromQL I cannot. Please help me, how can I collect all query request above with only one Query Request.

[tgug...@redhat.com]

Have you tried using the "or" operator to combine these two queries?

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tgug...@redhat.com

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[Mạnh Nguyễn Tiến]

I tried, but the operator "or" will return just one value with "or" of multiple values from multiple queries.

Vào 16:50:16 UTC+7 Thứ Tư, ngày 11 tháng 9 năm 2019, tgug...@redhat.com đã viết:

Have you tried using the "or" operator to combine these two queries? 

On Wed, 2019-09-11 at 02:36 -0700, Mạnh Nguyễn Tiến wrote: 

> I have many Query Request using PromQL like: 

> - Collect disk read rate: sum by (instance) 

> (irate(node_disk_read_bytes_total[2m])) / 1024 / 1024 

> - Collect CPU Available:  (avg by(instance) 

> (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) 

> If just with metrics, I can do it using operator "|": 

> http://Prometheus_IP_Address/api/v1/query?query={__name__=~”node_memory_Buffers_bytes|node_cpu_seconds_total”,instance=”Node_Exporter_IPAddress”} 

> 

> But with PromQL I cannot. Please help me, how can I collect all query 

> request above with only one Query Request. 

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> You received this message because you are subscribed to the Google 

> Groups "Prometheus Users" group. 

> To unsubscribe from this group and stop receiving emails from it, 

> send an email to promethe...@googlegroups.com. 

[tgug...@redhat.com]

Oops, missed that.

That's because both queries get exactly the same label set in their
responses. You can work around that by adding an additional label to
each result and then combine them using or:

label_replace(sum by (instance) (irate(node_disk_read_bytes_total[2m]))
/ 1024 / 1024, "device", "disk", "instance", ".*") or label_replace(avg
by(instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100,
"device", "cpu", "instance", ".*")

On Wed, 2019-09-11 at 03:02 -0700, Mạnh Nguyễn Tiến wrote:
> I tried, but the operator "or" will return just one value with "or"
> of multiple values from multiple queries.
>
>
>

> send an email to prometheus-use...@googlegroups.com.

> To view this discussion on the web visit

> https://groups.google.com/d/msgid/prometheus-users/ba05cf8f-ce65-4b5d-9864-49536ae77b1c%40googlegroups.com
> .