OCI VM.Standard.E3.Flex unit is rebooting

After changing the VM Shape to VM.Standard.E3.Flex in OCI, the LoadMaster reboots by itself

Product: LoadMaster

Version: Any

Platform: Oracle Cloud (OCI)

Application: Any

The VM.Standard.1.2 shape is being decommissioned by Oracle in October 2023. 
An alternative VM shape is VM.Standard.E3.Flex. However, with this new shape, the LoadMaster will reboot by itself.

2023-10-03T18:40:27+00:00 lb100 logger: System Booted

Intel GenuineIntel
CPU: vendor_id 'AuthenticAMD' unknown, using generic init.
CPU: Your system may be unstable.

VM.Standard.1.2 units are Intel-based which are supported by the LoadMaster kernel. As seen below, by default VM.Standard.E3.Flex are AMD-based while VM.Standard.1.2 are Intel-based:

So, in order to get the LoadMaster to work with a VM.Standard.E3.Flex unit, the CPU must the changed to be Intel-based.

To do so, from OCI, flexible shape compability must be added to the custom image (opencloud-qcow2-kemp-vlm). This can be done by following the steps listed below:

https://docs.oracle.com/en-us/iaas/Content/Compute/Tasks/managingcustomimages.htm#To33

Once completed, the instance can be modified to use a VM.Standard.E3.Flex shape which should now be Intel-based:

Last, a reboot is recommened so the LoadMaster reflects the new CPU. To do so, navigate to the WUI > System Configuration > System Administration > System Reboot > Reboot.

After the LoadMaster comes up, the boot logs will show the updated CPU details:

KERNEL supported cpus: Intel GenuineIntel
smpboot: CPU0: Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz (family: 0x6, model: 0x6a, stepping: 0x6)

https://kemptechnologies.com/blog/load-balancer-oracle-cloud-infrastructure-oci

https://docs.oracle.com/en-us/iaas/Content/Compute/References/computeshapes.htm

https://docs.oracle.com/en-us/iaas/Content/Compute/Tasks/managingcustomimages.htm