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Bug 2105935

Summary: Persistent storage prerequisites is not correct as the number of alertmanager replicas has been reduced in OCP 4.10
Product: OpenShift Container Platform Reporter: yhe
Component: DocumentationAssignee: Claire Bremble <cbremble>
Status: CLOSED CURRENTRELEASE QA Contact: Xiaoli Tian <xtian>
Severity: low Docs Contact: Claire Bremble <cbremble>
Priority: unspecified    
Version: 4.10CC: cbremble
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Last Closed: 2022-10-24 17:27:35 UTC Type: Bug
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Description yhe 2022-07-11 09:02:23 UTC 
Document URL: 
https://docs.openshift.com/container-platform/4.10/monitoring/configuring-the-monitoring-stack.html#persistent-storage-prerequisites

--> Because Prometheus has two replicas and Alertmanager has three replicas, you need five PVs to support the entire monitoring stack.

Section Number and Name: 
Persistent storage prerequisites

Describe the issue: 
In OCP 4.10, the number of Alertmanager replicas has been reduced from three to two, so the statement "Because Prometheus has two replicas and Alertmanager has three replicas, you need five PVs to support the entire monitoring stack." is not correct anymore. Please refer to the following release note.

https://docs.openshift.com/container-platform/4.10/release_notes/ocp-4-10-release-notes.html#ocp-4-10-monitoring-added-hard-anti-affinity-rules-and-pod-distruption-budgets

--> Alertmanager

    As part of this change, the number of Alertmanager replicas has been reduced from three to two.

Suggestions for improvement: 
Modify the statement to meet the correct number of Alertmanager replicas in OCP 4.10.

Additional information:
Comment 1 Claire Bremble 2022-10-24 17:27:35 UTC 
This was closed with https://issues.redhat.com/browse/RHDEVDOCS-4349