From c24b536bd954fe1263004e58302c3a84df6cfb2c Mon Sep 17 00:00:00 2001
From: Romain Primet <romain.primet@inria.fr>
Date: Fri, 13 Jul 2018 16:29:30 +0200
Subject: [PATCH] handle 503 as well

---
 tljh/installer.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tljh/installer.py b/tljh/installer.py
index 0ceb417..51205e3 100644
--- a/tljh/installer.py
+++ b/tljh/installer.py
@@ -153,7 +153,7 @@ def ensure_jupyterhub_running(times=4):
             # Everything else should immediately abort
             raise
         except HTTPError as h:
-            if h.code == 404:
+            if h.code in [404, 503]:
                 # May be transient
                 time.sleep(1)
                 continue