Alloy does not recognize "queue_config" block

[hmahdiany]

What's wrong?

I'm using Grafana Alloy version "1.4.3" running as a deamon-set on a Kubernetes cluster version 1.26.16. Here is my remote write configuration:

prometheus.remote_write "remote_write" {
        external_labels = {
        cluster = env("CLUSTER"),
        source_exporter = "alloy",
        }
        queue_config {
          max_samples_per_send = 8000
          batch_send_deadline  = "60s"
        }
        endpoint {
          url = env("REMOTE_WRITE_URL")
            basic_auth {
              username = env("REMOTE_WRITE_USERNAME")
              password = env("REMOTE_WRITE_PASSWORD")
            }
        }
      }

I get this error message:

Error: /etc/alloy/config.alloy:7:3: unrecognized block name "queue_config"

 6 |     }
 7 |     queue_config {
   |  ___^^^^^^^^^^^^^^
 8 | |     max_samples_per_send = 8000
 9 | |     batch_send_deadline  = "60s"
10 | |   }
   | |_^^^
11 |     endpoint {
interrupt received
Error: could not perform the initial load successfully

As documentation suggests "queue_config" should work from version "1.3.0" but it doesn't.

Steps to reproduce

Deploy Grafana Alloy via it's Helm chart with following configuration for remote write:

alloy:
  configMap:
    # -- Create a new ConfigMap for the config file.
    create: true
    # -- Content to assign to the new ConfigMap.  This is passed into `tpl` allowing for templating from values.
    content: |
      prometheus.remote_write "remote_write" {
        external_labels = {
        cluster = env("CLUSTER"),
        source_exporter = "alloy",
        }
        queue_config {
          max_samples_per_send = 8000
          batch_send_deadline  = "60s"
        }
        endpoint {
          url = env("REMOTE_WRITE_URL")
            basic_auth {
              username = env("REMOTE_WRITE_USERNAME")
              password = env("REMOTE_WRITE_PASSWORD")
            }
        }
      }

It creates a configmap on your cluster called "alloy" and when you get Alloy log it shows that "queue_config" is not a valid block.

System information

Kubernetes 1.26.16

Software version

Grafana Alloy v1.4.3

Configuration

prometheus.remote_write "remote_write" {
        external_labels = {
        cluster = env("CLUSTER"),
        source_exporter = "alloy",
        }
        queue_config {
          max_samples_per_send = 8000
          batch_send_deadline  = "60s"
        }
        endpoint {
          url = env("REMOTE_WRITE_URL")
            basic_auth {
              username = env("REMOTE_WRITE_USERNAME")
              password = env("REMOTE_WRITE_PASSWORD")
            }
        }
      }

Logs

`Error: /etc/alloy/config.alloy:7:3: unrecognized block name "queue_config"

 6 |     }
 7 |     queue_config {
   |  ___^^^^^^^^^^^^^^
 8 | |     max_samples_per_send = 8000
 9 | |     batch_send_deadline  = "60s"
10 | |   }
   | |_^^^
11 |     endpoint {
interrupt received
Error: could not perform the initial load successfully`

[dehaansa]

The queue_config block belongs inside the endpoint block, that should resolve your issue.

[hmahdiany]

Thank you @dehaansa. It definitely solved my problem. I think this document should be updated.

[wildum]

hi, the blocks table has a hierarchy column with "endpoint > queue_config".
"The > symbol indicates deeper levels of nesting. For example, endpoint > basic_auth refers to a basic_auth block defined inside an endpoint block."
This seems easy to miss in big docs though. Maybe nested block descriptions should mention their parent block? @clayton-cornell any thoughts on this?