[BUG] Directors flagged as undefined variables

[tibbon]

When linting my VCL with falco (via Terraform) I'm getting this error:

🔥 [ERROR] Undefined variable "alb_main"
in main.vcl at line 358, position 21
 358|  set req.backend = alb_main;

Relevant bits of VCL:

director alb_main random {
   .quorum = 10%;
   .retries = 5;
   {
    .backend = F_alb_main_0;
    .weight  = 100;
   }
}

In both my custom vcl_recv (and in the snippet Fastly auto-inserts, i should probably de-dupe them) I have:

set req.backend = alb_main;

Expected behavior

Fastly's Director documentation says:

Like backends, directors can be assigned to req.backend, and can also be used as a backend in other directors.

so I'd expect this to be ok.

Desktop

required

• OS: MacOS 14.6.1
• Shell zsh

[tibbon]

🔥 [ERROR] Function "alb_main.backend" is not defined
in main.vcl at line 358, position 25
 358 |      set req.backend = alb_main.backend();
                             ^^^^^^^^^^^^^^^^

When I try to use the .backend() function, I'm getting this error.

[tibbon]

I downloaded my actual VCL file from Fastly and ran the linting, and it didn't find these errors at all. I wonder if the way my backends are being generated from VCL don't include them, and they all get squashed together via Fastly's templating.

[ysugimoto]

Hi @tibbon, thank you for reaching out to our project.

Just to confirm - Is your director will be created via Terraform using this block?

Currently we're fetch Fastly resources only backend, dictionary, acls, snippets, and logging endpoints so director won't be fetched.

I downloaded my actual VCL file from Fastly and ran the linting, and it didn't find these errors at all. I wonder if the way my backends are being generated from VCL don't include them, and they all get squashed together via Fastly's templating.

On the actual generated VCL, Fastly will generate with registered directors so probably the linting will be fine.

If true for my confirmation, we will support director to solve it.