Add support for annotations and labels in spec. (#739)

```
stack: webapp-deployer-backend
deploy-to: k8s
annotations:
  foo.bar.annot/{name}: baz
labels:
  a.b.c/{name}.blah: "value"
```

Reviewed-on: cerc-io/stack-orchestrator#739
Co-authored-by: Thomas E Lackey <telackey@bozemanpass.com>
Co-committed-by: Thomas E Lackey <telackey@bozemanpass.com>

stack_orchestrator/deploy/k8s/cluster_info.py

@@ -281,13 +281,37 @@ class ClusterInfo:
                     env=envs,
                     ports=[client.V1ContainerPort(container_port=port)],
                     volume_mounts=volume_mounts,
+                    security_context=client.V1SecurityContext(
+                        privileged=self.spec.get_privileged(),
+                        capabilities=client.V1Capabilities(
+                            add=self.spec.get_capabilities()
+                        ) if self.spec.get_capabilities() else None
+                    ),
                     resources=to_k8s_resource_requirements(resources),
                 )
                 containers.append(container)
         volumes = volumes_for_pod_files(self.parsed_pod_yaml_map, self.spec, self.app_name)
         image_pull_secrets = [client.V1LocalObjectReference(name="laconic-registry")]
+
+        annotations = None
+        labels = {"app": self.app_name}
+
+        if self.spec.get_annotations():
+            annotations = {}
+            for key, value in self.spec.get_annotations().items():
+                for service_name in services:
+                    annotations[key.replace("{name}", service_name)] = value
+
+        if self.spec.get_labels():
+            for key, value in self.spec.get_labels().items():
+                for service_name in services:
+                    labels[key.replace("{name}", service_name)] = value
+
         template = client.V1PodTemplateSpec(
-            metadata=client.V1ObjectMeta(labels={"app": self.app_name}),
+            metadata=client.V1ObjectMeta(
+                annotations=annotations,
+                labels=labels
+            ),
             spec=client.V1PodSpec(containers=containers, image_pull_secrets=image_pull_secrets, volumes=volumes),
         )
         spec = client.V1DeploymentSpec(

stack_orchestrator/deploy/spec.py

@@ -106,3 +106,15 @@ class Spec:
                 if self.obj and constants.network_key in self.obj
                 and constants.http_proxy_key in self.obj[constants.network_key]
                 else None)
+
+    def get_annotations(self):
+        return self.obj.get("annotations", {})
+
+    def get_labels(self):
+        return self.obj.get("labels", {})
+
+    def get_privileged(self):
+        return "true" == str(self.obj.get("security", {}).get("privileged", "false")).lower()
+
+    def get_capabilities(self):
+        return self.obj.get("security", {}).get("capabilities", [])

stack_orchestrator/deploy/webapp/undeploy_webapp_from_registry.py

@@ -147,6 +147,7 @@ def command(ctx, laconic_config, deployment_parent_dir,
 
     previous_requests = load_known_requests(state_file)
     requests.sort(key=lambda r: r.createTime)
+    requests.reverse()
 
     # Find deployments.
     deployments = {}