feat(msd): adding label for api boundary nodes

.github/workflows/msd-diff.yaml

@@ -15,6 +15,8 @@ jobs:
   msd-diff:
     runs-on:
       labels: dre-runner-custom
+    # This image is based on ubuntu:20.04
+    container: ghcr.io/dfinity/dre/actions-runner:0.2.1
     steps:
       - uses: actions/checkout@v4
         with:
@@ -32,6 +34,7 @@ jobs:
 
       - name: "🔭 Compute MSD"
         id: msd-diff
+        shell: bash
         run: |
           set -exuo pipefail
           REGISTRY_DIR_MAIN="$HOME/tmp/main-registry"

rs/ic-observability/multiservice-discovery-shared/src/builders/prometheus_config_structure.rs

@@ -33,6 +33,7 @@ pub const IC_NAME: &str = "ic";
 pub const IC_NODE: &str = "ic_node";
 pub const IC_SUBNET: &str = "ic_subnet";
 pub const JOB: &str = "job";
+pub const API_BOUNDARY_NODE: &str = "api_boundary_node";
 // TODO: Re-add the labels below once we resolve the issues with the public dashboard queries
 // https://dfinity.atlassian.net/browse/OB-442
 // const DC: &str = "dc";
@@ -65,6 +66,10 @@ pub fn map_target_group(target_groups: Vec<TargetDto>) -> Vec<PrometheusStaticCo
                             Some(subnet_id) => vec![(IC_SUBNET.into(), subnet_id.to_string())],
                             None => vec![],
                         })
+                        .chain(match tg.is_api_bn {
+                            true => vec![(API_BOUNDARY_NODE.into(), "1".into())],
+                            false => vec![],
+                        })
                         .chain(tg.custom_labels.clone().into_iter())
                         .collect()
                         // TODO: Re-add the labels below once we resolve the issues with the public dashboard queries