render manifests for ms (llm-d#902)

Signed-off-by: vezio <tyler.rimaldi@ibm.com>

Author: Vezio

llmdbenchmark/standup/steps/step_09_deploy_modelservice.py

@@ -84,6 +84,14 @@ def execute(  # pylint: disable=too-many-branches,too-many-locals,too-many-state
         helmfile_work = helm_dir / "helmfile.yaml"
 
         if helmfile_work.exists():
+            # Render modelservice manifests to workspace for inspection
+            # before applying.  This gives full visibility into what the
+            # Helm chart produces and enables post-render patching.
+            self._render_ms_manifests(
+                cmd, context, helmfile_work, namespace,
+                model_id_label, stack_name, helm_dir,
+            )
+
             result = cmd.helmfile(
                 "--namespace",
                 namespace,
@@ -100,6 +108,10 @@ def execute(  # pylint: disable=too-many-branches,too-many-locals,too-many-state
         else:
             main_helmfile = self._find_yaml(stack_path, "10_helmfile-main")
             if main_helmfile:
+                self._render_ms_manifests(
+                    cmd, context, main_helmfile, namespace,
+                    model_id_label, stack_name, helm_dir,
+                )
                 result = cmd.helmfile(
                     "--namespace",
                     namespace,
@@ -314,6 +326,46 @@ def execute(  # pylint: disable=too-many-branches,too-many-locals,too-many-state
             stack_name=stack_name,
         )
 
+    def _render_ms_manifests(
+        self,
+        cmd: CommandExecutor,
+        context: ExecutionContext,
+        helmfile_path,
+        namespace: str,
+        model_id_label: str,
+        stack_name: str,
+        helm_dir: Path,
+    ) -> None:
+        """Render modelservice Helm chart manifests to workspace for inspection.
+
+        Runs ``helmfile template`` to produce the fully rendered K8s manifests
+        that the chart would create, and writes them to
+        ``{helm_dir}/rendered-modelservice.yaml``.  This gives users full
+        visibility into decode/prefill Deployments, Services, ConfigMaps, etc.
+        before they are applied to the cluster.
+        """
+        if context.dry_run:
+            return
+
+        rendered_path = helm_dir / "rendered-modelservice.yaml"
+        result = cmd.helmfile(
+            "--namespace", namespace,
+            "--selector", f"name={model_id_label}-ms",
+            "template", "-f", str(helmfile_path),
+            "--skip-schema-validation",
+        )
+        if result.success and result.stdout.strip():
+            rendered_path.write_text(result.stdout, encoding="utf-8")
+            context.logger.log_info(
+                f"📄 Rendered modelservice manifests to {rendered_path.name} "
+                f"({len(result.stdout.splitlines())} lines)"
+            )
+        elif not result.success:
+            context.logger.log_warning(
+                f"Could not render modelservice manifests (non-fatal): "
+                f"{result.stderr[:200]}"
+            )
+
     def _check_priority_class(
         self,
         cmd: CommandExecutor,