Home / server / Questions / 983803
In Process
David Barranco
Asked: 2019-09-12 03:05:50 +0800 CST

Issues upgrading a c3 instance to a c5

  • 772

This week I'm working on some cost-saving tasks and I'm moving up some instances from the c3 family (c3.8xlarge) to the c5 family (c5.4xlarge).

I'm facing some issues at the boot time of the c5 family, this is what Cloudwatch shows:

CPU graph

And the same with the network out bytes:

network out bytes

The rest of the dashboards show the same behaviour, a huge spike at the boot time and then zero.

From the SSH perspective, the instance is totally unresponsive. This is what I have tried so far:

  • Use the Launch more like this feature to get an instance to test.
  • Moved up Ubuntu generic Kernel to 4.4.0-1067.77
  • Moved the Ubuntu AWS Kernel to 4.4.0-1085-aws
  • Followed these AWS docs to check if the instance is compatible with a c5, no errors so far.

I have tried with some instances from the c4 family (c4.4xlarge) and didn't face any issue. This seems to be related with the Nitro kernel that the c5 family has.

Could you please point me to any other thing I could try here? Thanks in advance

amazon-web-services

0 Answers