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How To Configure DB Nodes to Generate VMCore on iSCSI Boot Disk

in Linux 2 comments

Applies to: 

Oracle Cloud Infrastructure - Version N/A and later

Linux x86-64

 

Goal

Database nodes that boot from iSCSI need special configuration to be able to create vmcore in the boot disk.


Solution


The size of the memory reserved to the crashkernel might be insufficient to boot the kdump initramfs.

By default, when building an Kdump initramfs with kdumpctl, the ip=dhcp kernel parameter is removed. Also, some extra modules used by the database can make the initramfs too large to the system memory.

The kdump service needs to be tuned to work.

·       To reduce the size of the initramfs:

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