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OCI VM.Standard.E3.Flex unit is rebooting

 

Information

 

Summary:

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

Environment:

Product: LoadMaster

Version: Any

Platform: Oracle Cloud (OCI)

Application: Any

Question/Problem Description:

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.

Steps to Reproduce:  
Error Message:

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.

Defect Number:  
Enhancement Number:  
Cause: The LoadMaster current kernel does not support AMD.
Resolution:

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:

CPU details.png

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

custom image.png

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

E3 shape.png

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)

Workaround:  
Notes:

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


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