[pve-devel] [PATCH ha-manager 3/5] scheduling: make static scheduling optional

[Daniel Kral]

On Mon Sep 22, 2025 at 2:04 PM CEST, Fabian Grünbichler wrote:
> it's not available in the simulator
>
> Signed-off-by: Fabian Grünbichler <f.gruenbichler at proxmox.com>
> ---
>  src/PVE/HA/Manager.pm | 21 +++++++++++++++------
>  1 file changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/src/PVE/HA/Manager.pm b/src/PVE/HA/Manager.pm
> index ba59f64..cfd509a 100644
> --- a/src/PVE/HA/Manager.pm
> +++ b/src/PVE/HA/Manager.pm
> @@ -14,7 +14,12 @@ use PVE::HA::Rules::NodeAffinity qw(get_node_affinity);
>  use PVE::HA::Rules::ResourceAffinity
>      qw(get_affinitive_resources get_resource_affinity apply_positive_resource_affinity apply_negative_resource_affinity);
>  use PVE::HA::Usage::Basic;
> -use PVE::HA::Usage::Static;
> +
> +my $have_static_scheduling;
> +eval {
> +    require PVE::HA::Usage::Static;
> +    $have_static_scheduling = 1;
> +};
>  
>  ## Variable Name & Abbreviations Convention
>  #
> @@ -244,11 +249,15 @@ sub recompute_online_node_usage {
>  
>      if (my $mode = $self->{crs}->{scheduler}) {
>          if ($mode eq 'static') {
> -            $online_node_usage = eval {
> -                my $scheduler = PVE::HA::Usage::Static->new($haenv);
> -                $scheduler->add_node($_) for $online_nodes->@*;
> -                return $scheduler;
> -            };
> +            if ($have_static_scheduling) {
> +                $online_node_usage = eval {
> +                    my $scheduler = PVE::HA::Usage::Static->new($haenv);
> +                    $scheduler->add_node($_) for $online_nodes->@*;
> +                    return $scheduler;
> +                };
> +            } else {
> +                $@ = "static scheduling not available\n";
> +            }

Since this cropped up almost 3 years after the static load scheduler was
added and the GTK-based ha-simulator might be on its way out already
[0], I think it would be nice to add a stub for
PVE::HA::Usage::Static here the same way as you did for PVE::Cluster as
otherwise it clutters the main code for the rather rarely used
standalone ha-simulator.

[0] https://bugzilla.proxmox.com/show_bug.cgi?id=6743

>              $haenv->log(
>                  'warning',
>                  "fallback to 'basic' scheduler mode, init for 'static' failed - $@",