MWPW-193327 - [infra] make nala test GH runners more stable and robust

.github/actions/prep-apt/action.yml

@@ -0,0 +1,43 @@
+name: Install Playwright system dependencies
+description: >
+    Stops background apt services, waits for dpkg/apt locks to clear, then
+    installs Playwright system dependencies with retry logic. Intended for
+    self-hosted Linux runners where unattended-upgrades can cause intermittent
+    apt lock contention or mirror-sync failures.
+
+runs:
+    using: composite
+    steps:
+        - name: Stop background apt services
+          shell: bash
+          run: |
+              sudo systemctl stop unattended-upgrades apt-daily.service apt-daily-upgrade.service 2>/dev/null || true
+              echo "Waiting for apt locks to clear..."
+              timeout 120 bash -c '
+                while sudo fuser /var/lib/dpkg/lock /var/lib/dpkg/lock-frontend \
+                                 /var/lib/apt/lists/lock /var/cache/apt/archives/lock \
+                                 2>/dev/null; do
+                  echo "  apt lock held, retrying in 5s..."
+                  sleep 5
+                done
+              ' || {
+                echo "Lock wait timed out — force-killing lock holders"
+                sudo fuser -k /var/lib/dpkg/lock /var/lib/dpkg/lock-frontend \
+                              /var/lib/apt/lists/lock /var/cache/apt/archives/lock 2>/dev/null || true
+                sudo dpkg --configure -a 2>/dev/null || true
+              }
+
+        - name: Install Playwright system dependencies (with retry)
+          shell: bash
+          run: |
+              for attempt in 1 2 3; do
+                echo "Attempt $attempt: npx playwright install-deps"
+                npx playwright install-deps && break
+                if [ $attempt -lt 3 ]; then
+                  echo "Failed, retrying in 15s..."
+                  sleep 15
+                else
+                  echo "All attempts failed"
+                  exit 1
+                fi
+              done

.github/workflows/run-nala-daily.yml

@@ -45,12 +45,16 @@ jobs:
             - name: Cache Playwright browsers
               uses: actions/cache@v4
               id: playwright-cache
+              continue-on-error: true
               with:
                   path: ~/.cache/ms-playwright
                   key: playwright-${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}-${{ hashFiles('**/playwright.config.js') }}
 
-            - name: Install Playwright dependencies
-              run: npx playwright install --with-deps
+            - name: Install Playwright system dependencies
+              uses: ./.github/actions/prep-apt
+
+            - name: Install Playwright browsers
+              run: npx playwright install
 
             - name: Set execute permission for gh.run.sh
               run: chmod +x ./nala/utils/gh.run.sh

.github/workflows/run-nala-milolibs.yaml

@@ -49,12 +49,16 @@ jobs:
             - name: Cache Playwright browsers
               uses: actions/cache@v4
               id: playwright-cache
+              continue-on-error: true
               with:
                   path: ~/.cache/ms-playwright
                   key: playwright-${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}-${{ hashFiles('**/playwright.config.js') }}
 
-            - name: Install Playwright dependencies
-              run: npx playwright install --with-deps
+            - name: Install Playwright system dependencies
+              uses: ./.github/actions/prep-apt
+
+            - name: Install Playwright browsers
+              run: npx playwright install
 
             - name: Set environment variables
               run: |

.github/workflows/run-nala.yml

@@ -65,7 +65,7 @@ jobs:
                   key: playwright-${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}-${{ hashFiles('**/playwright.config.js') }}
 
             - name: Install Playwright system dependencies
-              run: npx playwright install-deps
+              uses: ./.github/actions/prep-apt
 
             - name: Install/verify Playwright browsers
               run: |
@@ -162,6 +162,8 @@ jobs:
                   path: ~/.cache/ms-playwright
                   key: playwright-${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}-${{ hashFiles('**/playwright.config.js') }}
 
+            # Docs tests run on GitHub-hosted runners (ubuntu-latest) — no unattended-upgrades
+            # lock contention, so the prep-apt composite action is not needed here.
             - name: Install Playwright system dependencies
               if: steps.playwright-cache.outputs.cache-hit != 'true'
               run: npx playwright install-deps