Instances not starting as c5.* with wheezy

[choseh]

3.2.0-4-amd64 #1 SMP Debian 3.2.96-2 x86_64 GNU/Linux

filename: /lib/modules/3.2.0-4-amd64/updates/dkms/ena.ko
version: 1.5.1g
license: GPL
description: Elastic Network Adapter (ENA)
author: Amazon.com, Inc. or its affiliates
srcversion: 121BE61723081CBF841045A
alias: pci:v00001D0Fd0000EC21svsdbcsci*
alias: pci:v00001D0Fd0000EC20svsdbcsci*
alias: pci:v00001D0Fd00001EC2svsdbcsci*
alias: pci:v00001D0Fd00000EC2svsdbcsci*
depends:
vermagic: 3.2.0-4-amd64 SMP mod_unload modversions
parm: debug:Debug level (0=none,...,16=all) (int)

unfortunately I can't provide additional logs, since the instances just plain hang and i have to force stop them and --no-ena-support them to work again

please let me know if there's a way to provide additional debug output

[zorikm]

Hello @choseh
May we ask you to provide your region and instance id?

Thanks

[choseh]

hi @zorikm I tried with i-e01d602e and yesterday with i-c8cf1a09 in eu-central-1

[zorikm]

Looks like you are using C4 instance type for your current instance and T2 for the previous one.
Both of these instance types DO NOT support ENA.
Please see https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html for the list of instance types that support ENA.

Thanks.

[choseh]

@zorikm I had to change the instance type back again, due to the instances hanging obviously. I'll set one to c5 and enable ena, so you can have a look.

i-e01d602e is now c5 and trying to boot.
edit2

looks like it booted, but it's not reachable (1/2 status checks)

also: no udev rules, and yes, I updated the initramfs

[zorikm]

Your issue doesn't seem to be related to ENA.
We suspect that your AMI doesn't suit C5 instance type.
Please contact AWS support.

Thanks

[zorikm]

@choseh,
To open EC2 support request, in your console, on the upper right corner select support center, and then you will see "create case".