Await for backend to be ready before showing link

packaging/nginx.conf.template

@@ -41,6 +41,16 @@ http {
             proxy_send_timeout                 360000s;
             proxy_read_timeout                 360000s;
         }
+
+        location /management {
+                    client_max_body_size   16G;
+                    proxy_pass http://localhost:9000;
+                    proxy_http_version                 1.1;
+
+                    proxy_connect_timeout              360000s;
+                    proxy_send_timeout                 360000s;
+                    proxy_read_timeout                 360000s;
+                }
     }
 }
 

python-client/giskard/commands/cli_server.py

@@ -1,5 +1,6 @@
 import logging
 import os
+import time
 from pathlib import Path
 from typing import Optional
 from urllib.parse import urlparse
@@ -91,6 +92,33 @@ def get_container(version=None, quit_if_not_exists=True) -> Optional[Container]:
             return None
 
 
+def _is_backend_ready(endpoint) -> bool:
+    try:
+        response = requests.get(endpoint)
+        response.raise_for_status()
+        return "UP" == response.json()["status"]
+    except KeyboardInterrupt:
+        raise click.Abort()
+    except BaseException:
+        return False
+
+
+def _wait_backend_ready(port: int) -> bool:
+    endpoint = f"http://localhost:{port}/management/health"
+    backoff_time = 2
+    max_duration_second = 3 * 60
+    started_time = time.time()
+    up = False
+
+    while not up or time.time() - started_time > max_duration_second:
+        time.sleep(backoff_time)
+        up = _is_backend_ready(endpoint)
+        click.echo(".", nl=False)
+
+    click.echo(".")
+    return up
+
+
 def _start(attached=False, version=None):
     logger.info("Starting Giskard Server")
 
@@ -115,7 +143,16 @@ def _start(attached=False, version=None):
             volumes={home_volume.name: {"bind": "/home/giskard/datadir", "mode": "rw"}},
         )
     container.start()
-    logger.info(f"Giskard Server {version} started. You can access it at http://localhost:{port}")
+
+    up = _wait_backend_ready(port)
+
+    if up:
+        logger.info(f"Giskard Server {version} started. You can access it at http://localhost:{port}")
+    else:
+        logger.warning(
+            "Giskard backend takes unusually long time to start, please check the logs with `giskard server "
+            "logs backend"
+        )
 
 
 def _check_downloaded(version: str):