Add ingress to the charm

src/charm.py

@@ -8,6 +8,11 @@ import logging
 import time
 
 import ops
+from charms.traefik_k8s.v2.ingress import (
+    IngressPerAppReadyEvent,
+    IngressPerAppRequirer,
+    IngressPerAppRevokedEvent,
+)
 
 # A standalone module for workload-specific logic (no charming concerns):
 import charmed_server
@@ -24,6 +29,16 @@ class CharmedServerCharm(ops.CharmBase):
         framework.observe(self.on.start, self._on_start)
         framework.observe(self.on.config_changed, self._on_config_changed)
 
+        self.ingress = IngressPerAppRequirer(self, port=80)
+        framework.observe(self.ingress.on.ready, self._on_ingress_ready)
+        framework.observe(self.ingress.on.revoked, self._on_ingress_revoked)
+
+    def _on_ingress_ready(self, event: IngressPerAppReadyEvent):
+        logger.info("This app's ingress URL: %s", event.url)
+
+    def _on_ingress_revoked(self, event: IngressPerAppRevokedEvent):
+        logger.info("This app no longer has ingress")
+
     def _on_install(self, event: ops.InstallEvent):
         """Install the workload on the machine."""
         charmed_server.install()

src/charmed_server.py

@@ -24,6 +24,7 @@ STATIC_SOURCE_DIR = CHARM_DIR / "src" / "static"
 CONFIG_FILE = pathops.LocalPath("/etc/nginx/nginx.conf")
 PID_FILE = pathops.LocalPath(CHARM_DIR / "nginx.pid")
 
+
 def ensure_config() -> bool:
     """Ensure that nginx is configured. Return True if any changes were made."""
     config = f"""\
@@ -53,11 +54,12 @@ http {{
 def install() -> None:
     """Install nginx apt package."""
     apt.update()
-    apt.add_package("nginx", "1.18.0-6ubuntu14.7")
+    apt.add_package("nginx", "1.18.0-6ubuntu14.8")
     subprocess.check_output(["service", "nginx", "stop"])
     os.remove("/etc/nginx/nginx.conf")
     os.unlink("/etc/nginx/sites-enabled/default")
 
+
 def is_installed() -> bool:
     """Check if nginx is installed."""
     return shutil.which("nginx") is not None

src/static/index.html

@@ -44,6 +44,7 @@
         <li>This is particularly useful for riscv64 Flutter builds that Google doesn't host yet</li>
         <li>Flutter can be built for riscv64 using the following patch: <a href="https://github.com/flutter/flutter/pull/178712">PR #178712</a> (as well as a Swiftshader patch)</li>
         <li>The upstream/master Flutter tool supports riscv64, but older versions will need: <a href="https://github.com/flutter/flutter/pull/178711">PR #178711</a></li>
+        <li>The first version of the Flutter tool that supports riscv64 will be 3.42</li>
     </ul>
 
     <h2>Hosted artifacts:</h2>