AWS C5 (and other) instances

BillBuilt

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Mar 6, 2018
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Hello,
I went to launch a cPanel instance on AWS using the cPanel AWS AMI but it will not let me launch it on a C5 instance? I have successfully manually installed cPanel on a C5 / CentOS 7 but wanted to use the "official" AMI. Ay idea why it isn't allowed?

The message given is: "This instance type requires ENA support. To enable this instance type, return to the previous step and select an AMI that is enabled for ENA. This instance type is not compatible with the selected AMI."

The C4 instances are selectable as well as the M4 instances.

Thanks
 

SS-Maddy

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Hello @BillBuilt ENA driver may be missing or flag may not enabled in the "Official" AMI. cPanel may need to build a new AMI with ENA enabled. It may not be purposeful as this flag needs to be manually enabled and iirc haven't seen the options listed while building AMI from console. You would need to raise a support ticket with them. Since you have installed cPanel on a C5 using CentOS 7 AMI, I think you are good.

Still if you want to use AMI, I guess you first have to check whether the ena driver is on cPanel AMI using the command ethtool -I eth0 and if it is listed, what you would need is to launch cPanel official AMI in C4 or any instance which is not insisting on the new ENA driver. And then modify the instance attribute like below and then build an AMI from that instance.
aws ec2 modify-instance-attribute --instance-id "I-instance-id-of-c4" --ena-support --region your-region-of-c4

Raising a support ticket with cPanel is recommended though as it is better they relaunch the AMI with ENA support.
 

BillBuilt

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Hello, Thanks for the reply.

>Since you have installed cPanel on a C5 using CentOS 7 AMI, I think you are good.

Yes it is working and running fine. I was just worried about getting support with such an instance since i was not able to install the "official" AMI. It's stated everywhere that cPanel will not offer support on anything other than that AMI, but if I can't use it, then......?
 

BillBuilt

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Thanks, i"ll do that. Although I wonder, at least in my case, if it even matters since i did not purchase my cPanel license directly from cPanel but rather a 3rd party.
 

SS-Maddy

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Thanks, i"ll do that. Although I wonder, at least in my case, if it even matters since i did not purchase my cPanel license directly from cPanel but rather a 3rd party.
cPanel cares about the product and it's partners :) So no worries man! They will take care of your issue
 

BillBuilt

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For anyone else worried about support on a non-cPanel CentOS AMI, here is the reply:

If you are worried about support, fear not. So long as cPanel is running on CentOS, and you have a valid license, we will support the software, even if you aren't using AMI on Amazon.
 
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cPanel Scott

cPanel Systems Engineering Manager
Jul 31, 2007
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Hi Bill!
The current cPanel AMI does not support C5 (and similar instance types) because they don't support network devices other than ENA. We are not actively working on this, but it is on our backlog to pick up as a part of improving the overall Amazon AMI experience. Would you find it acceptable to use a C4 instance in the meantime?

Thanks!

Scott
 

BillBuilt

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It's all good - just worried about getting support if I need it - and according to the ticket reply I got I should be fine. C4 is more expensive than C5, plus C5 is the latest generation of compute optimized instances so I'd rather stay with C5. The C5 is working fine with a manual cPanel installation. Thanks
 

osvi

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Any update on this? I would like to buy a C5 reserved instance, so I cannot start a C4 and migrate it to C5.
What could I do?
 

cPanelLauren

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osvi

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Is that ok to spin up a C5 instance using Centos provided by AWS, then install cPanel using your installer? Is that supported?
 

cPanelLauren

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Hi @osvi

Again at this time the C5 instances aren't supported due to the networking configuration - my assumption is when the above-referenced CentOS case is resolved we'll be able to work towards getting this supported.


**Edit**

It would appear that I was actually incorrect here, we recently did add support for the AWS C5 instances. You should be able to build this out using our image which can be found here: AWS Marketplace: cPanel & WHM for Linux
 
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