Merge pull request #1660 from mathbunnyru/asalikhov/add_healthcheck

Add healthcheck command to Dockerfile

Author: mathbunnyru

base-notebook/Dockerfile

@@ -171,6 +171,12 @@ RUN sed -re "s/c.ServerApp/c.NotebookApp/g" \
     /etc/jupyter/jupyter_server_config.py > /etc/jupyter/jupyter_notebook_config.py && \
     fix-permissions /etc/jupyter/
 
+# HEALTHCHECK documentation: https://docs.docker.com/engine/reference/builder/#healthcheck
+# This healtcheck works well for `lab`, `notebook`, `nbclassic`, `server` and `retro` jupyter commands
+# https://github.com/jupyter/docker-stacks/issues/915#issuecomment-1068528799
+HEALTHCHECK  --interval=15s --timeout=3s --start-period=5s --retries=3 \
+    CMD wget -O- --no-verbose --tries=1 http://localhost:8888/api || exit 1
+
 # Switch back to jovyan to avoid accidental container runs as root
 USER ${NB_UID}