enhancement: Daskgateway deployment with Helm charts/kustomize

src/_nebari/stages/kubernetes_daskgateway/__init__.py

@@ -0,0 +1,45 @@
+import contextlib
+from typing import Any, Dict, List, Type
+
+from _nebari.stages.base import NebariKustomizeStage
+from nebari import schema
+from nebari.hookspecs import NebariStage, hookimpl
+
+
+class InputSchema(schema.Base):
+    pass
+
+
+class OutputSchema(schema.Base):
+    pass
+
+
+class DaskGatewayStage(NebariKustomizeStage):
+    name = "10-kubernetes-daskgateway"
+    priority = 100
+
+    input_schema = InputSchema
+    output_schema = OutputSchema
+
+    @property
+    def kustomize_vars(self):
+        return {
+            "namespace": self.config.namespace,
+            "daskgateway_helm_version": self.config.monitoring.healthchecks.daskgateway_helm_version,
+        }
+
+    @contextlib.contextmanager
+    def deploy(
+        self, stage_outputs: Dict[str, Dict[str, Any]], disable_prompt: bool = False
+    ):
+        if self.config.monitoring.healthchecks.enabled:
+            with super().deploy(stage_outputs, disable_prompt):
+                yield
+        else:
+            with self.destroy(stage_outputs, {}):
+                yield
+
+
+@hookimpl
+def nebari_stage() -> List[Type[NebariStage]]:
+    return [DaskGatewayStage]

src/_nebari/stages/kubernetes_daskgateway/template/kustomization.yaml.tmpl

@@ -0,0 +1,11 @@
+# kustomization.yaml
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+helmCharts:
+- name: daskgateway
+  repo: https://helm.dask.org/
+  releaseName: daskgateway
+  namespace: {{ namespace }}
+  version: "{{ daskgateway_helm_version }}"
+  valuesFile: values.yaml

src/_nebari/stages/kubernetes_daskgateway/template/values.yaml

@@ -0,0 +1,29 @@
+metadata:
+  name: ${var.name}-daskgateway-gateway
+  namespace: var.namespace
+
+spec:
+  replicas: 1
+  selector:
+    match_labels:
+      app.kubernetes.io/component: dask-gateway-gateway
+
+  template:
+    metadata:
+
+      labels:
+        app.kubernetes.io/component: dask-gateway-gateway
+
+      annotations:
+        checksum/config-map: sha256(jsonencode(kubernetes_config_map.gateway.data))
+        checksum/secret: sha256(jsonencode(kubernetes_secret.gateway.data))
+
+    spec:
+      affinity:
+        node_affinity:
+          required_during_scheduling_ignored_during_execution:
+            node_selector_term:
+              match_expressions:
+                key: var.general-node-group.key
+                operator: In
+                values: var.general-node-group.value