add devhub-traefik

.github/workflows/build-docker.yml

@@ -67,9 +67,22 @@
             --build-arg "BASE_IMG=node" \
             --build-arg "ARG_PROFILE_JUPYTER=hub"
           push_image dev-hub
+
+  job-dev-hub-traefik:
+    name: "dev-hub-traefik"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - run: |
+          source ./tool.sh
+          build_image dev-hub-traefik latest docker_devbox/hub.Dockerfile \
+            --build-arg "BASE_IMG=base" \
+            --build-arg "ARG_PROFILE_JUPYTER=hub" \
+            --build-arg "ARG_KEEP_NODEJS=false"
+          push_image dev-hub-traefik
 
   ## OpenResty as gateway
   job-openresty:
     name: "openresty"
     runs-on: ubuntu-latest
     steps:

docker_devbox/hub.Dockerfile

@@ -20,15 +20,21 @@ RUN set -eux \
  && for profile in $(echo $ARG_PROFILE_JUPYTER | tr "," "\n") ; do ( setup_jupyter_${profile} ) ; done \
  ## If not keeping NodeJS, remove NoedJS to reduce image size, and install Traefik instead
  && if [ ${ARG_KEEP_NODEJS} = "false" ] ; then \
-      echo "Removing Node/NPM..." && rm -rf /usr/bin/node /usr/bin/npm /usr/bin/npx /opt/node ; \
-      echo "Installing Traefik to server as proxy:" && source /opt/utils/script-setup-net.sh && setup_traefik ; \
+       # Using Traefik to server as proxy, which is a modern HTTP reverse proxy and load balancer that makes deploying microservices easy.
+       echo "Removing Node/NPM..." && rm -rf /usr/bin/node /usr/bin/npm /usr/bin/npx /opt/node ; \
+       echo "Installing Traefik to server as proxy:" && source /opt/utils/script-setup-net.sh && setup_traefik ; \
     else \
-      echo "Keep NodeJS as ARG_KEEP_NODEJS defiend as: ${ARG_KEEP_NODEJS}" ; \
+       # Using NodeJS to install configurable-http-proxy, which is a dependency of JupyterHub, and also used as the default proxy for JupyterHub.
+       echo "Keep NodeJS as ARG_KEEP_NODEJS defiend as: ${ARG_KEEP_NODEJS}" ; \
+       curl -fsSL -o /usr/local/bin/start-configurable-http-proxy.sh https://raw.githubusercontent.com/jupyterhub/configurable-http-proxy/refs/heads/main/chp-docker-entrypoint ; \
+       which npm && ( npm install -g npm configurable-http-proxy ) || ( echo "NPM not found!" && return 255 ) ; \
+       # Notes: there is also an python version of configurable-http-proxy available but has limited compatibility.
+       ln -sf $(which configurable-http-proxy) /usr/local/bin/configurable-http-proxy ; \
+       type configurable-http-proxy && echo "@ Configurable HTTP Proxy version: $(configurable-http-proxy --version)" || return -1 ; \
  fi \
  ## network-tools https://github.com/jupyterhub/zero-to-jupyterhub-k8s/blob/main/images/network-tools/Dockerfile
  && apt-get update && apt-get install -y --no-install-recommends \
       iptables dnsutils libcurl4 libpq5 sqlite3 \
- && curl -fsSL -o /usr/local/bin/start-configurable-http-proxy.sh https://raw.githubusercontent.com/jupyterhub/configurable-http-proxy/refs/heads/main/chp-docker-entrypoint \
  && mv /opt/utils/start-*.sh /usr/local/bin/ \
  && chmod +x /usr/local/bin/start-*.sh \
  ## Clean up and display components version information...

docker_devbox/work/script-devbox-jupyter.sh

@@ -103,8 +103,6 @@ setup_jupyter_hub() {
    # ref1: https://github.com/jupyterhub/jupyterhub
    # ref2: https://github.com/jupyterhub/jupyterhub/blob/main/Dockerfile
    # ref3: https://github.com/jupyterhub/zero-to-jupyterhub-k8s/blob/main/images/hub/unfrozen/requirements.txt
-   which npm && ( npm install -g npm configurable-http-proxy ) || ( echo "NPM not found!" && return 255 ) ;
-
    pip install -Uq --pre jupyterhub jupyter_client \
       dockerspawner jupyterhub-kubespawner jupyterhub-systemdspawner wrapspawner \
       jupyterhub-ldapauthenticator jupyterhub-kerberosauthenticator \
@@ -115,10 +113,5 @@ setup_jupyter_hub() {
       psutil pycurl py-spy \
       jupyterhub-traefik-proxy ;
 
-   # Notes: there is also an python version of configurable-http-proxy available but has limited compatibility.
-   ln -sf $(which configurable-http-proxy) /usr/local/bin/configurable-http-proxy ;
-
-   type configurable-http-proxy && echo "@ Configurable HTTP Proxy version: $(configurable-http-proxy --version)" || return -1 ;
-
    type jupyterhub && echo "@ JupyterHub version: $(jupyterhub --version)" || return -1 ;
 }