Add resource usage metrics collection for MIMO actuator #4498
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ArrisLee
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hawkowl
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Dec 8, 2025
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hawkowl
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hawkowl
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I don't think we need to explicitly produce these metrics. I'll follow up on Slack.
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Description
For JIRA: https://issues.redhat.com/browse/ARO-21063
Adds resource usage metrics collection for the MIMO actuator to monitor its CPU, memory, and I/O consumption when deployed on VMSS alongside the RP.
This addresses the "noisy neighbor" risk by providing visibility into MIMO's resource footprint for right-sizing and alerting.
Changes
pkg/mimo/metrics/resource_usage.go- collector that reads from Linux/procfilesystempkg/mimo/metrics/resource_usage_test.go- unit testscmd/aro/mimoactuator.go- start collector on actuator startupMetrics
mimo.resource.cpu.percentmimo.resource.memory.bytesmimo.resource.memory.percentmimo.resource.io.read_bytesmimo.resource.io.write_bytesMetrics are emitted every minute via the existing statsd/MDM infrastructure.
Testing