PromQL error

[yuanbohan]

What type of bug is this?

Unexpected error

What subsystems are affected?

Frontend, Datanode

What happened?

I tried some PromQL expressions of node-exporter dashboard, but failed to query expected results for some expressions.

• [ ] avg(node_load5) / count(count(node_cpu_seconds_total) by (cpu))

Error: No field named cpu. Valid fields are node_load5.greptime_timestamp, "AVG(node_load5.greptime_value)".

• [ ] node_memory_SwapTotal_bytes - node_memory_SwapFree_bytes

No field named node_memory_swapfree_bytes.instance. Valid fields are "node_memory_SwapTotal_bytes".instance, "node_memory_SwapTotal_bytes".job, "node_memory_SwapTotal_bytes".greptime_timestamp, "node_memory_SwapTotal_bytes".greptime_value, "node_memory_SwapFree_bytes".instance, "node_memory_SwapFree_bytes".job, "node_memory_SwapFree_bytes".greptime_timestamp, "node_memory_SwapFree_bytes".greptime_value.

What operating system did you use?

Linux beelink 6.4.7-arch1-2 #1 SMP PREEMPT_DYNAMIC Mon, 31 Jul 2023 11:41:04 +0000 x86_64 GNU/Linux

Relevant log output and stack trace

No response

How can we reproduce the bug?

• use GreptimeCloud preview, and exec docker run --rm -e GREPTIME_URL='' -e GREPTIME_USERNAME='' -e GREPTIME_PASSWORD='' --name greptime-node-exporter greptime/node-exporter from quick start without prometheus
• directly exec the expressions above

[waynexia]

I've verified this is fixed on the current latest HEAD, the corresponding PR should be https://github.com/GreptimeTeam/greptimedb/pull/2297