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Bug 1996785

Summary: Unused rules in CMO
Product: OpenShift Container Platform Reporter: Haoyu Sun <hasun>
Component: MonitoringAssignee: Haoyu Sun <hasun>
Status: CLOSED ERRATA QA Contact: hongyan li <hongyli>
Severity: low Docs Contact:
Priority: medium    
Version: 4.9CC: amuller, anpicker, aos-bugs, arajkuma, erooth, hongyli, mrobson
Target Milestone: ---   
Target Release: 4.9.0   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-10-18 17:47:55 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Haoyu Sun 2021-08-23 16:37:00 UTC 
Description of problem:

The recording rules that are not unused in alerts, telemetry metrics, console, or dashboard definitions are wasting resources in Openshift Cluster. We need them removed.

The following rules are not used:
- build_error_rate
- cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
- code:registry_api_request_count:rate:sum
- instance:node_cpu:ratio
- kube_pod_status_ready:etcd:sum
- kube_pod_status_ready:image_registry:sum
- namespace:container_spec_cpu_shares:sum
- node:node_num_cpu:sum
- pod:container_spec_cpu_shares:sum


Version-Release number of selected component (if applicable):


How reproducible:
N/A

Steps to Reproduce:
N/A

Actual results:
The rules above are present in CMO.

Expected results:
The rules above are removed from CMO.

Additional info:
Comment 8 hongyan li 2021-09-06 04:17:04 UTC 
$ oc -n openshift-monitoring get cm prometheus-k8s-rulefiles-0 -oyaml|grep -E '.yaml|build_error_rate|cluster_quantile:apiserver_request_duration_seconds:histogram_quantile|code:registry_api_request_count:rate:sum|instance:node_cpu:ratio|kube_pod_status_ready:etcd:sum|kube_pod_status_ready:image_registry:sum|namespace:container_spec_cpu_shares:sum|node:node_num_cpu:sum|pod:container_spec_cpu_shares:sum'

  openshift-kube-apiserver-kube-apiserver-slos.yaml: |
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile


$ oc -n openshift-monitoring get cm telemetry-config -oyaml|grep -E 'build_error_rate|cluster_quantile:apiserver_request_duration_seconds:histogram_quantile|code:registry_api_request_count:rate:sum|instance:node_cpu:ratio|kube_pod_status_ready:etcd:sum|kube_pod_status_ready:image_registry:sum|namespace:container_spec_cpu_shares:sum|node:node_num_cpu:sum|pod:container_spec_cpu_shares:sum'
no result

$ for i in $(oc -n openshift-monitoring get cm | grep grafana | awk '{print $1}'); do echo $i; oc -n openshift-monitoring get cm $i -oyaml | grep  -E "build_error_rate|cluster_quantile:apiserver_request_duration_seconds:histogram_quantile|code:registry_api_request_count:rate:sum|instance:node_cpu:ratio|kube_pod_status_ready:etcd:sum|kube_pod_status_ready:image_registry:sum|namespace:container_spec_cpu_shares:sum|node:node_num_cpu:sum|pod:container_spec_cpu_shares:sum"; echo -e "\n"; done
grafana-dashboard-cluster-total
no result

$ oc -n openshift-monitoring get cm prometheus-k8s-rulefiles-0 -oyaml|grep -E -C20 cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
---
      - expr: |
          histogram_quantile(0.99, sum by (le, resource) (rate(apiserver_request_duration_seconds_bucket{job="apiserver",verb=~"LIST|GET"}[5m]))) > 0
        labels:
          quantile: "0.99"
          verb: read
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
      - expr: |
          histogram_quantile(0.99, sum by (le, resource) (rate(apiserver_request_duration_seconds_bucket{job="apiserver",verb=~"POST|PUT|PATCH|DELETE"}[5m]))) > 0
        labels:
          quantile: "0.99"
          verb: write
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
      - expr: |
          histogram_quantile(0.99, sum(rate(apiserver_request_duration_seconds_bucket{job="apiserver",subresource!="log",verb!~"LIST|WATCH|WATCHLIST|DELETECOLLECTION|PROXY|CONNECT"}[5m])) without(instance, pod))
        labels:
          quantile: "0.99"
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
      - expr: |
          histogram_quantile(0.9, sum(rate(apiserver_request_duration_seconds_bucket{job="apiserver",subresource!="log",verb!~"LIST|WATCH|WATCHLIST|DELETECOLLECTION|PROXY|CONNECT"}[5m])) without(instance, pod))
        labels:
          quantile: "0.9"
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
      - expr: |
          histogram_quantile(0.5, sum(rate(apiserver_request_duration_seconds_bucket{job="apiserver",subresource!="log",verb!~"LIST|WATCH|WATCHLIST|DELETECOLLECTION|PROXY|CONNECT"}[5m])) without(instance, pod))
        labels:
          quantile: "0.5"
        record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile

$ oc -n openshift-kube-apiserver get prometheusrules kube-apiserver-slos -oyaml | grep "cluster_quantile:apiserver_request_duration_seconds:histogram_quantile"
      record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
      record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
      record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
      record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile
      record: cluster_quantile:apiserver_request_duration_seconds:histogram_quantile

The above recording rules under namespace openshift-kube-apiserver that are not unused in alerts, telemetry metrics, console, or dashboard definitions are wasting resources in Openshift Cluster, they should be removed, but they are not shipped by monitoring, will file a new bug.
Comment 9 hongyan li 2021-09-06 04:41:30 UTC 
Test with payload 4.9.0-0.nightly-2021-09-05-192114
Comment 14 errata-xmlrpc 2021-10-18 17:47:55 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: OpenShift Container Platform 4.9.0 bug fix and security update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2021:3759