AWS China AMI use wrong linux kernel

[nouse]

Ubuntu 16.04 and 18.04 images in AWS China install generic kernel instead of AWS kernel, we have to install AWS kernel manually. I expect AMI can switch to AWS kernel so we can skip that step.

[Philip Roche (philroche)]

Hi,

Thank you for filing this bug. Can you provide details on which AMI you are using and in which region you are launching?

Phil

[nouse (masterwujiang)]

We use cn-northwest-1 region, latest AMI of 16.04 is ami-032ddff247c0bae9e, 18.04 is ami-0a22b8776bb32836b, owner is 837727238323

[Philip Roche (philroche)]

All current Canonical (837727238323) published 18.04 Bionic images do have the linux-aws kernel installed.

```
ubuntu@ip-172-31-47-200:~$ curl -w '\n' http://169.254.169.254/latest/meta-data/ami-id
ami-0a22b8776bb32836b
ubuntu@ip-172-31-47-200:~$ cat /etc/cloud/build.info
build_name: server
serial: 20200323
ubuntu@ip-172-31-47-200:~$ uname -a
Linux ip-172-31-47-200 4.15.0-1063-aws #67-Ubuntu SMP Mon Mar 2 07:24:29 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
ubuntu@ip-172-31-47-200:~$ dpkg -l | grep linux-aws
ii linux-aws 4.15.0.1063.64 amd64 Complete Linux kernel for Amazon Web Services (AWS) systems.
ii linux-aws-headers-4.15.0-1063 4.15.0-1063.67 all Header files related to Linux kernel version 4.15.0
```

You are correct that our 16.04 Xenial AMIs in aws-cn partition still have the generic kernel and fixing this delta between aws and aws-cn for 16.04 Xenial AMIs is something we are actively working on. Until that work lands it is still possible to install the linux-aws kernel and reboot.

```
sudo apt-get update
sudo apt-get remove --purge --assume-yes '^linux-.*' 'linux-base+'
sudo apt-get install --assume-yes linux-aws
sudo reboot
```

```
ubuntu@ip-172-31-36-173:~$ uname -a
Linux ip-172-31-36-173 4.4.0-1113-aws #126-Ubuntu SMP Fri Aug 14 13:24:17 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
```