Add workflow to define runner name

Author: MaxBed4d

.github/workflows/runs-on-preq.yml

@@ -0,0 +1,36 @@
+---
+name: Create output for `runs-on` variable
+
+on:
+  workflow_call:
+    inputs:
+      runner_env:
+        description: 'The environment input from caller workflow'
+        default: 'SMS Lab'
+        required: True
+        type: string
+    outputs:
+      runner_name_image_build:
+        description: "Image builder runner name"
+        value: ${{ jobs.define_runner.outputs.image-build-runner }}
+      runner_name_aio:
+        description: "AiO runner name"
+        value: ${{ jobs.define_runner.outputs.aio-runner }}
+
+jobs:
+  define_runner:
+    environment: ${{ inputs.runner_env }}
+    runs-on: ubuntu-latest
+    outputs:
+      image-build-runner: ${{ steps.builder-runner.outputs.runner_name_image_build }}
+      aio-runner: ${{ steps.aio-runner.outputs.runner_name_aio }}
+    steps:
+      - name: Set output for image builder runner
+        run: echo "Setting runner for ${{ inputs.runner_env }} -> ${{ vars.RUNS_ON_TARGET_IMAGE_BUILDER }}"
+      - id: builder-runner
+        run: echo "runner_name_image_build=${{ vars.RUNS_ON_TARGET_IMAGE_BUILDER }}" >> $GITHUB_OUTPUT
+      - name: Set output for aio runner
+        run: echo "Setting runner for ${{ inputs.runner_env }} -> ${{ vars.RUNS_ON_TARGET_AIO }}"
+      - id: aio-runner
+        run: echo "runner_name_aio=${{ vars.RUNS_ON_TARGET_AIO }}" >> $GITHUB_OUTPUT
+      

.github/workflows/stackhpc-container-image-build.yml

@@ -52,7 +52,6 @@ jobs:
   generate-tag:
     name: Generate container image tag
     if: github.repository == 'stackhpc/stackhpc-kayobe-config'
-    environment: ${{ inputs.runner_env }}
     runs-on: ubuntu-latest
     permissions: {}
     outputs:
@@ -109,22 +108,23 @@ jobs:
         run: |
           echo "${{ steps.datetime_tag.outputs.datetime_tag }}"
 
-      - name: Verify environment
-        run : |
-          echo "Environment variable RUNS_ON_TARGET_IMAGE_BUILDER: ${{ vars.RUNS_ON_TARGET_IMAGE_BUILDER }}"
+  runner-preqs:
+    uses: ./.github/workflows/runs-on-preq.yml
+    with:
+      runner_env: ${{ inputs.runner_env }}
 
   container-image-build:
     name: Build Kolla container images
     if: github.repository == 'stackhpc/stackhpc-kayobe-config'
-    environment: ${{ inputs.runner_env }}
-    runs-on: ${{ vars.RUNS_ON_TARGET_IMAGE_BUILDER }}
+    runs-on: ${{ needs.runner-preqs.outputs.runner_name_image_build }}
     timeout-minutes: 720
     permissions: {}
     strategy:
       fail-fast: false
       matrix: ${{ fromJson(needs.generate-tag.outputs.matrix) }}
     needs:
       - generate-tag
+      - runner-preqs
     steps:
       - name: Install package dependencies
         run: |