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hashicorp / nomad

Nomad is an easy-to-use, flexible, and performant workload orchestrator that can deploy a mix of microservice, batch, containerized, and non-containerized applications. Nomad is easy to operate and scale and has native Consul and Vault integrations.
https://www.nomadproject.io/
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Support specifying the machine type in qemu driver #17419

Open mrschyte opened 1 year ago

mrschyte commented 1 year ago

Proposal

The qemu driver should allow specifying the machine type for a vm. For example the config section could have a machine_type field which is copied to the qemu arguments when launching the vm.

Use-cases

Having an option to change the machine type would allow running microvms as well as virtual machines which require a specific machine type to be able to boot.

Attempted Solutions

I've tried specifying the machine type in the args array, however this is ignored since nomad automatically prepends a hard-coded machine type.

shoenig commented 1 year ago

related: https://github.com/hashicorp/nomad/pull/15510

FibreFoX commented 1 year ago

Depending on the hosting client, there might not be all machine types available, as they are QEMU version dependent. Maybe the QEMU-driver could discover the available machine types and expose them on the driver status list on the client detail page.

https://www.qemu.org/docs/master/system/invocation.html

/usr/bin/qemu-system-x86_64 -machine help

Example output when running that command on an raspberry pi running Debian Bookworm:

Supported machines are:
microvm              microvm (i386)
pc                   Standard PC (i440FX + PIIX, 1996) (alias of pc-i440fx-7.2)
pc-i440fx-7.2        Standard PC (i440FX + PIIX, 1996) (default)
pc-i440fx-7.1        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-7.0        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-6.2        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-6.1        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-6.0        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-5.2        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-5.1        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-5.0        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-4.2        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-4.1        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-4.0        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-3.1        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-3.0        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.9        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.8        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.7        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.6        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.5        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.4        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.3        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.2        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.12       Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.11       Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.10       Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.1        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.0        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.7        Standard PC (i440FX + PIIX, 1996) (deprecated)
pc-i440fx-1.6        Standard PC (i440FX + PIIX, 1996) (deprecated)
pc-i440fx-1.5        Standard PC (i440FX + PIIX, 1996) (deprecated)
pc-i440fx-1.4        Standard PC (i440FX + PIIX, 1996) (deprecated)
q35                  Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-7.2)
pc-q35-7.2           Standard PC (Q35 + ICH9, 2009)
pc-q35-7.1           Standard PC (Q35 + ICH9, 2009)
pc-q35-7.0           Standard PC (Q35 + ICH9, 2009)
pc-q35-6.2           Standard PC (Q35 + ICH9, 2009)
pc-q35-6.1           Standard PC (Q35 + ICH9, 2009)
pc-q35-6.0           Standard PC (Q35 + ICH9, 2009)
pc-q35-5.2           Standard PC (Q35 + ICH9, 2009)
pc-q35-5.1           Standard PC (Q35 + ICH9, 2009)
pc-q35-5.0           Standard PC (Q35 + ICH9, 2009)
pc-q35-4.2           Standard PC (Q35 + ICH9, 2009)
pc-q35-4.1           Standard PC (Q35 + ICH9, 2009)
pc-q35-4.0.1         Standard PC (Q35 + ICH9, 2009)
pc-q35-4.0           Standard PC (Q35 + ICH9, 2009)
pc-q35-3.1           Standard PC (Q35 + ICH9, 2009)
pc-q35-3.0           Standard PC (Q35 + ICH9, 2009)
pc-q35-2.9           Standard PC (Q35 + ICH9, 2009)
pc-q35-2.8           Standard PC (Q35 + ICH9, 2009)
pc-q35-2.7           Standard PC (Q35 + ICH9, 2009)
pc-q35-2.6           Standard PC (Q35 + ICH9, 2009)
pc-q35-2.5           Standard PC (Q35 + ICH9, 2009)
pc-q35-2.4           Standard PC (Q35 + ICH9, 2009)
pc-q35-2.12          Standard PC (Q35 + ICH9, 2009)
pc-q35-2.11          Standard PC (Q35 + ICH9, 2009)
pc-q35-2.10          Standard PC (Q35 + ICH9, 2009)
isapc                ISA-only PC
none                 empty machine

I am just toying with this a bit, I have tried adding args:

            config {
                args = [
                    # ...
                    "-machine",
                    "type=q35,accel=tcg"
                ]
            }