diff --git a/deploy/Dockerfile b/deploy/Dockerfile
index b5866c0c..a03794b1 100644
--- a/deploy/Dockerfile
+++ b/deploy/Dockerfile
@@ -88,7 +88,9 @@ FROM php-base AS runtime
 
 # Keep the existing PHP/Composer cache layers when adding PostgreSQL support.
 RUN apt-get -o Acquire::Retries=3 update \
-    && apt-get -o Acquire::Retries=3 install -y --no-install-recommends libpq-dev \
+    && apt-get -o Acquire::Retries=3 install -y --no-install-recommends \
+        acl \
+        libpq-dev \
     && docker-php-ext-install -j2 pdo_pgsql \
     && rm -rf /var/lib/apt/lists/*
 
diff --git a/deploy/entrypoint.sh b/deploy/entrypoint.sh
index 422e0dd2..7d86eeb9 100644
--- a/deploy/entrypoint.sh
+++ b/deploy/entrypoint.sh
@@ -22,8 +22,31 @@ if [ "$(id -u)" = "0" ]; then
     fi
 fi
 
+grant_web_process_acl() {
+    command -v setfacl >/dev/null 2>&1 || return 0
+
+    for path in \
+        storage/framework/cache \
+        storage/framework/sessions \
+        storage/framework/views \
+        storage/logs \
+        bootstrap/cache
+    do
+        [ -e "$path" ] || continue
+        setfacl -R -m u:www-data:rwx "$path"
+        find "$path" -type d -exec \
+            setfacl -m d:u:www-data:rwx,d:u::rwx,d:g::rwx,d:m::rwx,d:o::rx {} +
+    done
+}
+
+if [ "$(id -u)" = "0" ]; then
+    grant_web_process_acl
+fi
+
 assert_web_writable() {
     runuser -u www-data -- test -w storage/app
+    runuser -u www-data -- test -w storage/framework/cache/data
+    runuser -u www-data -- test -w storage/framework/sessions
     runuser -u www-data -- test -w storage/framework/views
     runuser -u www-data -- test -w storage/logs
     runuser -u www-data -- test -w bootstrap/cache
@@ -72,4 +95,8 @@ if [ "${1:-}" = "apache2-foreground" ]; then
     fi
 fi
 
+if [ "$(id -u)" = "0" ] && [ "${1:-}" != "apache2-foreground" ]; then
+    exec runuser -u www-data -- "$@"
+fi
+
 exec "$@"
diff --git a/tests/Unit/Deployment/WebProcessOwnershipTest.php b/tests/Unit/Deployment/WebProcessOwnershipTest.php
index 12130d05..273873e4 100644
--- a/tests/Unit/Deployment/WebProcessOwnershipTest.php
+++ b/tests/Unit/Deployment/WebProcessOwnershipTest.php
@@ -20,9 +20,28 @@ class WebProcessOwnershipTest extends TestCase
             $entrypoint
         );
         $this->assertStringContainsString('assert_web_writable', $entrypoint);
+        $this->assertStringContainsString('grant_web_process_acl', $entrypoint);
+        $this->assertStringContainsString(
+            'setfacl -m d:u:www-data:rwx,d:u::rwx,d:g::rwx,d:m::rwx,d:o::rx',
+            $entrypoint
+        );
+        $this->assertStringContainsString(
+            'exec runuser -u www-data -- "$@"',
+            $entrypoint
+        );
         $this->assertDoesNotMatchRegularExpression('/^\s*php artisan /m', $entrypoint);
     }
 
+    public function test_runtime_image_installs_acl_tools_for_persistent_storage(): void
+    {
+        $dockerfile = file_get_contents(base_path('deploy/Dockerfile'));
+
+        $this->assertIsString($dockerfile);
+        $this->assertStringContainsString("--no-install-recommends \\\n", $dockerfile);
+        $this->assertStringContainsString("        acl \\\n", $dockerfile);
+        $this->assertStringContainsString('libpq-dev', $dockerfile);
+    }
+
     public function test_local_worker_healthcheck_and_initialization_use_web_user(): void
     {
         $compose = file_get_contents(base_path('docker-compose.local.yml'));