Oracle VM: OVS (Dom0) Node Failed to Survive STORAGE Controller Outage Due to Wrong DMMP (multipath.conf) and o2cb timeout Settings (Doc ID 2022679.1)

Last updated on OCTOBER 10, 2022

Applies to:

Oracle Cloud Infrastructure - Version N/A and later
Oracle VM - Version 3.1.1 to 3.4.6 [Release OVM31 to OVM34]
Linux x86-64
Linux x86

Symptoms

Customer Example scenario:

3 OVS nodes
Each Node connected to NetAPP Storage Unit

While there was Storage outage each OVS node started to report LUN paths issue but one of the node (node3) restarted automatically while other two 'survived' Storage Outage:

Node1:

Cause

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In this Document

Symptoms

Cause

Solution

1. Multipath configuration and SCSI timeout

2. O2CB Disk heartbeat timeout

3. As side note: Keep your kernel and device-mapper-multipath updated

References

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Oracle VM: OVS (Dom0) Node Failed to Survive STORAGE Controller Outage Due to Wrong DMMP (multipath.conf) and o2cb timeout Settings (Doc ID 2022679.1)

Applies to:

Symptoms

Cause

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Don't have a My Oracle Support account? Click to get started!