update

spawnerdockerfile/docker_healthcheck.py

@@ -3,6 +3,7 @@
 # Distributed under the terms of the Modified BSD License.
 import json
 import os
+import subprocess
 from pathlib import Path
 
 import requests
@@ -10,7 +11,19 @@ import requests
 # Several operations below deliberately don't check for possible errors
 # As this is a healthcheck, it should succeed or raise an exception on error
 
-runtime_dir = Path("/home/") / os.environ["NB_USER"] / ".local/share/jupyter/runtime/"
+# Docker runs healtchecks using an exec
+# It uses the default user configured when running the image: root for the case of a custom NB_USER or jovyan for the case of the default image user.
+# We manually change HOME to make `jupyter --runtime-dir` report a correct path
+# More information: <https://github.com/jupyter/docker-stacks/pull/2074#issuecomment-1879778409>
+result = subprocess.run(
+    ["jupyter", "--runtime-dir"],
+    check=True,
+    capture_output=True,
+    text=True,
+    env=dict(os.environ) | {"HOME": "/home/" + os.environ["NB_USER"]},
+)
+runtime_dir = Path(result.stdout.rstrip())
+
 json_file = next(runtime_dir.glob("*server-*.json"))
 
 url = json.loads(json_file.read_bytes())["url"]
@@ -23,4 +36,4 @@ proxies = {
 
 r = requests.get(url, proxies=proxies, verify=False)  # request without SSL verification
 r.raise_for_status()
-print(r.content)
+print(r.content)