feat: run itests using ARM runners

.github/workflows/_charm-quality-checks.yaml

@@ -33,6 +33,13 @@ on:
           Sets the `automatically-retry-hooks` in the model-defaults config.
         required: true
         type: boolean
+      integration-tests-runners:
+          description: |
+            Json matrix of the runners to use to run the integration tests for the charm.
+            Example: ["ubuntu-latest","Ubuntu_ARM64_4C_16G_03"]
+          type: string
+          required: false
+          default: '["ubuntu-latest"]'
     secrets:
       CHARMHUB_TOKEN:
         required: false
@@ -164,7 +171,10 @@ jobs:
 
   pack-charm:
     name: Pack the charm
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      matrix:
+        runner: ${{ fromJSON(inputs.integration-tests-runners) }}
     needs:
       - linting
       - linting-rules
@@ -194,13 +204,16 @@ jobs:
       - name: Upload charm artifact
         uses: actions/upload-artifact@v4
         with:
-          name: charms-tests${{ (inputs.charm-path && inputs.charm-path != '.') && format('-{0}', inputs.charm-path) || '' }}
+          name: charms-tests-${{ runner.arch }}${{ (inputs.charm-path && inputs.charm-path != '.') && format('-{0}', inputs.charm-path) || '' }}
           path: ${{ inputs.charm-path }}/*.charm
 
   integration-mono:
     name: Integration Tests (sequential)
     if: ${{ ! inputs.parallelize-integration }}
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      matrix:
+        runner: ${{ fromJSON(inputs.integration-tests-runners) }}
     needs: [snap-channels, pack-charm]
     env:
       CONCIERGE_JUJU_CHANNEL: ${{ needs.snap-channels.outputs.juju-channel }}
@@ -218,7 +231,7 @@ jobs:
       - name: Download charm artifact
         uses: actions/download-artifact@v4
         with:
-          name: charms-tests${{ (inputs.charm-path && inputs.charm-path != '.') && format('-{0}', inputs.charm-path) || '' }}
+          name: charms-tests-${{ runner.arch }}${{ (inputs.charm-path && inputs.charm-path != '.') && format('-{0}', inputs.charm-path) || '' }}
           path: ${{ inputs.charm-path }}
       - name: Run integration tests
         run: |
@@ -249,12 +262,13 @@ jobs:
   integration-test:
     name: Integration Tests (parallel)
     if: ${{ inputs.parallelize-integration }}
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.runner }}
     needs: [snap-channels, pack-charm, integration-matrix]
     strategy:
       fail-fast: false
       matrix:
         suite: ${{ fromJSON(needs.integration-matrix.outputs.suites) }}
+        runner: ${{ fromJSON(inputs.integration-tests-runners) }}
     env:
       CONCIERGE_JUJU_CHANNEL: ${{ needs.snap-channels.outputs.juju-channel }}
       CONCIERGE_MICROK8S_CHANNEL: 1.32-strict/stable
@@ -271,7 +285,7 @@ jobs:
       - name: Download charm artifact
         uses: actions/download-artifact@v4
         with:
-          name: charms-tests${{ (inputs.charm-path && inputs.charm-path != '.') && format('-{0}', inputs.charm-path) || '' }}
+          name: charms-tests-${{ runner.arch }}${{ (inputs.charm-path && inputs.charm-path != '.') && format('-{0}', inputs.charm-path) || '' }}
           path: ${{ inputs.charm-path }}
       - name: Run integration tests
         run: |

.github/workflows/charm-pull-request.yaml

@@ -82,6 +82,32 @@ jobs:
           echo "Modified files: ${{ steps.changed-files.outputs.all_modified_files }}"
           echo "any_modified=${{ steps.changed-files.outputs.any_modified }}" >> "$GITHUB_OUTPUT"
 
+  define-matrix:
+    name: Define runner matrix
+    runs-on: ubuntu-latest
+    needs: [ci-ignore]
+    if: needs.ci-ignore.outputs.any_modified == 'true'
+    outputs:
+      runners: ${{ steps.runner-matrix.outputs.runners }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+          sudo snap install yq
+      - name: Define runner matrix
+        id: runner-matrix
+        run: |
+          cd "${{ inputs.charm-path }}"
+          runners="$( \
+            yq -o json '.platforms | to_entries | map(.key)' charmcraft.yaml | \
+            sed 's/".*amd64.*"/"ubuntu-latest"/' | \
+            sed 's/".*arm64.*"/"self-hosted-linux-arm64-noble-medium"/' | \
+            jq -rc 'unique' \
+          )"
+          echo "runners=$runners"
+          echo "runners=$runners" >> "$GITHUB_OUTPUT"
+
   lib-check:
     name: Check libraries  # Check if the charm libraries are updated and add the relevant label to the PR
     runs-on: ubuntu-latest
@@ -115,8 +141,10 @@ jobs:
     name: Quality Checks
     needs:
       - ci-ignore
+      - define-matrix
     if: needs.ci-ignore.outputs.any_modified == 'true'
-    uses: canonical/observability/.github/workflows/_charm-quality-checks.yaml@v1
+    # FIXME: point at v1
+    uses: canonical/observability/.github/workflows/_charm-quality-checks.yaml@OPENG-3328
     secrets: inherit
     with:
       charm-path: ${{ inputs.charm-path }}
@@ -125,4 +153,5 @@ jobs:
       juju-channel: ${{ inputs.juju-channel }}
       parallelize-integration: ${{ inputs.parallelize-integration }}
       automatically-retry-hooks: ${{ inputs.automatically-retry-hooks }}
+      integration-tests-runners: ${{ needs.define-matrix.outputs.runners }}
 

.github/workflows/charm-release.yaml

@@ -114,7 +114,7 @@ jobs:
           runners="$( \
             yq -o json '.platforms | to_entries | map(.key)' charmcraft.yaml | \
             sed 's/".*amd64.*"/"ubuntu-latest"/' | \
-            sed 's/".*arm64.*"/"Ubuntu_ARM64_4C_16G_03"/' | \
+            sed 's/".*arm64.*"/"self-hosted-linux-arm64-noble-medium"/' | \
             jq -rc 'unique' \
           )"
           echo "runners=$runners"
@@ -135,7 +135,8 @@ jobs:
 
   quality-checks:
     name: Quality Checks
-    uses: canonical/observability/.github/workflows/_charm-quality-checks.yaml@v1
+    # FIXME: point at v1
+    uses: canonical/observability/.github/workflows/_charm-quality-checks.yaml@OPENG-3328
     needs: [define-matrix]
     secrets: inherit
     with:
@@ -145,6 +146,7 @@ jobs:
       juju-channel: ${{ inputs.juju-channel }}
       parallelize-integration: ${{ inputs.parallelize-integration }}
       automatically-retry-hooks: ${{ inputs.automatically-retry-hooks }}
+      integration-tests-runners: "${{ needs.define-matrix.outputs.runners }}"
 
   release-charm:
     name: Release the charm