add nginx workload and some config

metadata.yaml

@@ -9,19 +9,19 @@ summary: Mimir coordinator
 description: |
     Mimir coordinator.
 
-#containers:
-#  nginx:
-#    resource: nginx-image
+containers:
+  nginx:
+    resource: nginx-image
 
 storage:
   data:
     type: filesystem
 
-#resources:
-#  nginx-image:
-#    type: oci-image
-#    description: OCI image for nginx
-#    upstream-source: ubuntu/nginx:1.18-22.04_beta
+resources:
+  nginx-image:
+    type: oci-image
+    description: OCI image for nginx
+    upstream-source: ubuntu/nginx:1.18-22.04_beta
 #  agent-image:
 #    type: oci-image
 #    upstream-source: ghcr.io/canonical/grafana-agent:latest

requirements.txt

@@ -1,2 +1,4 @@
 ops
 pydantic
+# crossplane is a package from nginxinc to interact with the Nginx config
+crossplane

src/charm.py

@@ -19,6 +19,7 @@
     PrometheusRemoteWriteConsumer,
 )
 from mimir_coordinator import MimirCoordinator
+from nginx import Nginx
 from ops.charm import CharmBase, CollectStatusEvent
 from ops.main import main
 from ops.model import ActiveStatus, BlockedStatus, Relation
@@ -32,6 +33,10 @@ class MimirCoordinatorK8SOperatorCharm(CharmBase):
 
     def __init__(self, *args):
         super().__init__(*args)
+
+        self._nginx_container = self.unit.get_container("nginx")
+        self._nginx_config_path = "/etc/nginx/nginx.conf"
+
         self.framework.observe(self.on.config_changed, self._on_config_changed)
         self.framework.observe(self.on.collect_unit_status, self._on_collect_status)
 
@@ -42,6 +47,12 @@ def __init__(self, *args):
         self.cluster_provider = MimirClusterProvider(self)
         self.coordinator = MimirCoordinator(cluster_provider=self.cluster_provider)
 
+        self.nginx = Nginx()
+        self.framework.observe(
+            self.on.nginx_pebble_ready,  # pyright: ignore
+            self._on_nginx_pebble_ready,
+        )
+
         self.framework.observe(
             self.on.mimir_cluster_relation_changed,  # pyright: ignore
             self._on_mimir_cluster_changed,
@@ -123,6 +134,12 @@ def _on_loki_relation_changed(self, _):
         # TODO Update rules relation with the new list of Loki push-api endpoints
         pass
 
+    def _on_nginx_pebble_ready(self, _event) -> None:
+        self._nginx_container.push(self.nginx.config_path, self.nginx.config, make_dirs=True)
+
+        self._nginx_container.add_layer("nginx", self.nginx.layer, combine=True)
+        self._nginx_container.autostart()
+
 
 if __name__ == "__main__":  # pragma: nocover
     main(MimirCoordinatorK8SOperatorCharm)