Launching QEMU / KVM with ignition file each time?

[Thomas Schneider]

Hi,

in the Getting Started guide
https://docs.fedoraproject.org/en-US/fedora-coreos/getting-started/
"Launching with QEMU" it is recommended to
"Specify the Ignition file to the hypervisor. In the case of QEMU, this
is done with the -fw_cfg parameter, which sets the opt/com.coreos/config
key".

Question:
Is it recommended to startup VMs every time with this -fw_cfg parameter?
Is this true for ISO installations on KVM, too?
Or must this -fw_cfg parameter only be used for initial startup?

Regards
Thomas

[Jonathan Lebon]

On Thu, Jan 23, 2020 at 8:22 AM Thomas Schneider  wrote:
> Question:
> Is it recommended to startup VMs every time with this -fw_cfg parameter?

You only technically need to specify it on first boot. Though often
time, it's easier to just leave it in, and that doesn't hurt either
(e.g. if you're launching the VM from a script or using libvirt).
> Is this true for ISO installations on KVM, too?

When installing via the ISO, you specify the Ignition config directly
to the installer, using `--ignition`. See:

https://docs.fedoraproject.org/en-US/fedora-coreos/bare-metal/#_installing_f...

Hope that helps!

[Thomas Schneider]

Great.

This basically answers my questions and confirms my assumption.

In the meantime I have "enabled" toolbox and will continue using this
for package installation instead of directly installing to FCOS.

THX

Am 23.01.2020 um 17:28 schrieb Jonathan Lebon:
> On Thu, Jan 23, 2020 at 8:22 AM Thomas Schneider  wrote:
> > Question:
> > Is it recommended to startup VMs every time with this -fw_cfg parameter?
>
> You only technically need to specify it on first boot. Though often
> time, it's easier to just leave it in, and that doesn't hurt either
> (e.g. if you're launching the VM from a script or using libvirt).
> > Is this true for ISO installations on KVM, too?
>
> When installing via the ISO, you specify the Ignition config directly
> to the installer, using `--ignition`. See:
>
> https://docs.fedoraproject.org/en-US/fedora-coreos/bare-metal/#_installing_f...
>
> Hope that helps!