feat: add secrets support for k8s deployments

Adds a `secrets:` key to spec.yml that references pre-existing k8s
Secrets by name. SO mounts them as envFrom.secretRef on all pod
containers. Secret contents are managed out-of-band by the operator.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

stack_orchestrator/constants.py

@@ -29,6 +29,7 @@ network_key = "network"
 http_proxy_key = "http-proxy"
 image_registry_key = "image-registry"
 configmaps_key = "configmaps"
+secrets_key = "secrets"
 resources_key = "resources"
 volumes_key = "volumes"
 security_key = "security"

stack_orchestrator/deploy/deployment_create.py

@@ -477,6 +477,9 @@ def init_operation(
             spec_file_content["volumes"] = {**volume_descriptors, **orig_volumes}
         if configmap_descriptors:
             spec_file_content["configmaps"] = configmap_descriptors
+        if "k8s" in deployer_type:
+            if "secrets" not in spec_file_content:
+                spec_file_content["secrets"] = {}
 
     if opts.o.debug:
         print(

stack_orchestrator/deploy/k8s/cluster_info.py

@@ -483,6 +483,16 @@ class ClusterInfo:
                         )
                     )
                 ]
+                # Mount user-declared secrets from spec.yml
+                for user_secret_name in self.spec.get_secrets():
+                    env_from.append(
+                        client.V1EnvFromSource(
+                            secret_ref=client.V1SecretEnvSource(
+                                name=user_secret_name,
+                                optional=True,
+                            )
+                        )
+                    )
                 container = client.V1Container(
                     name=container_name,
                     image=image_to_use,

stack_orchestrator/deploy/spec.py

@@ -115,6 +115,9 @@ class Spec:
     def get_configmaps(self):
         return self.obj.get(constants.configmaps_key, {})
 
+    def get_secrets(self):
+        return self.obj.get(constants.secrets_key, {})
+
     def get_container_resources(self):
         return Resources(
             self.obj.get(constants.resources_key, {}).get("containers", {})