Running update grub-pc in noninteractive mode

[Kathy L]

We are trying to update packages on several AWS servers via ansible. In the beginning of our playbook we have the environment to noninteractive like this:
    environment:
       DEBIAN_FRONTEND: noninteractive

When I run an update (or try to install anything, I get the error stating "/dev/sda does not exist". That is because for example, when provisioning AWS nodes, the disk type is not /dev/sda but something else.  

My question is how do i run update grub-pc with a specific disk?  I'm assuming I would get the disk "name" from ansible_facts (devices), grab the first disk, then run something similar to  "apt install grub-pc /dev/nvme01"

Is there a way to do this?  I tried the line above and it failed and I'm out of ideas. 

[Thanh Nguyen Duc]

You may try to gather fact, register the fact then execute the command in the next task. For me i usually  use shell to query what i need before proceeding next step, save a bit of time.

--- Example:

---
- name: Set location
  hosts: localhost
  connection: local
  gather_facts: false
  tasks:
  - name: Output disk information
    shell: fdisk -l /dev/sda | grep '^/dev' | cut -d' ' -f1
    register: myoutput
  - name: install
    shell: echo "{{myoutput.stdout_lines}}"

Vào Th 2, 23 thg 10, 2023 vào lúc 18:14 Kathy L <lyon...@gmail.com> đã viết:

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[Kathy Lyons]

The only issue is that I don't know what the name of the disk is - /dev/sda, dev/nvme0n1p1, etc.

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[Thanh Nguyen Duc]

Example if you know your command only need to execute from the first disk

fdisk -l | grep "^/dev/" | cut -d' ' -f1

You may need to custom abit then.

Vào Th 2, 23 thg 10, 2023 vào lúc 18:45 Kathy Lyons <lyon...@gmail.com> đã viết:

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[Dick Visser]

What exactly do you mean by 'update packages'?

We're using Debian EC2 instances and never had to bother with manually selecting disks/devices...

--

[Kathy Lyons]

That's great - thank you!

Now, does anyone know how I can do an "update grub-pc" with that particular hard drive so it doesn't prompt me for the disk drive?

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[Kathy Lyons]

Dick - just this morning I went to update packages on an AWS instance and it failed because the disk was not /dev/sda.  I had to logon to the box, issue apt update -y, then a dialog popped up asking me for the drive to install grub-pc on.

[Dick Visser]

What AMI are you using?

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[Kathy Lyons]

A generic Deb 11 image - not one we "own". 

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