Add support for Ignition File using FedoraCoreOS (FCOS) or RHCOS

[ovirt]

Add support for Ignition File using FedoraCoreOS (FCOS) or RHCOS

[mnecas]

Hi @anibal-aguila,
thanks for the issue!
We already support the Ignition File but it is not documented.
You need to set the operating_system to rhcos_x64 and then you can use cloud_init to pass data to the Ignition File.
Here is an example:

    - name: ignition file example
      ovirt_vm:
        auth: "{{ ovirt_auth }}"
        name: test
        cluster: Default
        operating_system: rhcos_x64
        cloud_init_persist: True
        cloud_init:
          host_name: example.com
          custom_script: |
            write_files:
             - content: |
                 Hello, world!
               path: /tmp/greeting.txt
               permissions: '0644'
          user_name: root
          root_password: super_password

(cloud_init_persist if you want to check the values or have it permanent, or you can use state running and have the cloud_init_persist false)

[anibal-aguila]

Hi @mnecas,

I tried your guide but get the same result, "Ignition: no config provided by user" the module sems to by working, as result I send a capture whit the the loaded config from OvirtEngine (Manager). But on the creation time the fedora coreos qcow2 look like don't load this file.

Could you tell me how fix it?
Thanks in advance,

Ovirt version: 4.4.2.6-1.el8
FedoraCoreOS version: fedora-coreos-32.20201004.3.0-qemu.x86_64

[mnecas]

You probably need to authenticate the user use the user_name and root_password.
But this is the "input data" issue ansible the only work is to pass the data (in this case) to the engine which did.
(not an expert on Ignition Files)

[anibal-aguila]

I found this references about two flags calling to the API on the starting time, did you know if I can pass this booleans with the module ovirt_vm?

Thanks :)

:use_ignition (Boolean) —
# If set to true, the initialization type is set to Ignition. The default value is false. See this for details.

:use_initialization (Boolean) —
# If set to true, the initialization type is set by the VM’s OS. Windows will set to Sysprep, Linux to cloud-init and RedHat CoreOS to Ignition. If any of the initialization-types are explicitly set (useCloudInit, useSysprep or useIgnition), they will be prioritized and this flag will be ignored. The default value is false.

https://www.ovirt.org/develop/release-management/features/virt/coreos-ignition-support.html
https://www.rubydoc.info/gems/ovirt-engine-sdk/OvirtSDK4/VmService

[anibal-aguila]

Hi @mnecas,
I tried the stable OpenStack qcow2 version and its working, here the link for future uses:
https://builds.coreos.fedoraproject.org/browser?stream=stable

Thanks for your support,