PromQL Note for Adding JVM Version Information to Micrometer Metrics

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This is a PromQL note for adding JVM version information to Micrometer's Prometheus metrics.

JVM information can be obtained from the following metric.

jvm_info{app="lognroll"}

I want to add this information to the following metric.

jvm_memory_used_bytes{app="lognroll"}

We will use the * operator for multiplication. Since the value of jvm_info is 1, the result will ultimately return the value of jvm_memory_used_bytes. We specify the matching labels with on (...) and keep the left labels with group_left.

jvm_memory_used_bytes{app="lognroll"} * on (app, instance) group_left(version, runtime, vendor) jvm_info{app="lognroll"}