F #228: Add cputune_shares setting for FE VMs

[sk4zuzu]

No description provided.

[dann1]

Hi @sk4zuzu 👋

Can cputune_shares_max be hardcoded ? It is something that the user can't change really. Since we don't want to support legacy things, we can use the cgv2 cap.

[dann1]

Also, not related to these changes, but related to the role in question. Looks like ETH0_SEARCH_DOMAIN is mandatory now. Not setting it yields an error while generating the context.sh contents

TASK [opennebula.deploy.infra : Create context.sh files] *************************************************************************************************************************
Tuesday 07 July 2026  17:00:51 +0200 (0:00:00.315)       0:00:08.304 **********
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: ansible.errors.AnsibleUndefinedVariable: 'dict object' has no attribute 'ETH0_SEARCH_DOMAIN'. 'dict object' has no attribute 'ETH0_SEARCH_DOMAIN'
failed: [i1] (item=0) =>
    ansible_loop_var: item
    changed: false
    item: 0
    msg: 'AnsibleUndefinedVariable: ''dict object'' has no attribute ''ETH0_SEARCH_DOMAIN''.
        ''dict object'' has no attribute ''ETH0_SEARCH_DOMAIN'''

Can this behavior be changed so it becomes optional, or has a default value, or an assertion, to avoid an exception. I'd say it should be optional, as it was before #173. The documentation of the parameter looks like copy pasted from DNS. Should be updated accordingly.

[dann1]

Maybe a review of these previous changes is needed, the dpdk socket path, could be made transparent now, for example. And the queues of that nic is set to static 2, could be tied to vcpu count instead.

[sk4zuzu]

@dann1 Yes, definitely, previous changes where more about how to combine OVS with FE VMs, so some things may be not optimal. Actually I'm working on bigger refactor of the whole role (from the templates to structures) and ability to run those FE VMs on isolated cpu and hugepages as a requirement. I think let's postpone this PR a bit. 🤗

[dann1]

If the nitpick about hardcoding the shares cap is deemed unnecessary, then LGTM