Add support for installing TLJH on Arm64 systems and bump traefik (1.7.18 -> 1.7.33)

.circleci/config.yml

@@ -0,0 +1,142 @@
+# We use circleci to test our support for the Arm64 architecture. This file
+# should mimic what is done in the GitHub workflows.
+#
+# Configuration reference: https://circleci.com/docs/2.0/configuration-reference/
+#
+version: 2.1
+
+commands:
+  build_systemd_image:
+    steps:
+      - run:
+          name: build systemd image
+          command: |
+            .circleci/integration-test.py build-image
+
+  basic_tests:
+    parameters:
+      # Whether or not we should run update tests
+      upgrade:
+        type: string
+        default: ""
+
+    steps:
+      - run:
+          name: Run basic tests
+          command: |
+            if [ $CIRCLE_PR_USERNAME ]; then
+                BOOTSTRAP_PIP_SPEC=git+https://github.com/$CIRCLE_PR_USERNAME/the-littlest-jupyterhub.git@$CIRCLE_SHA1
+            else
+                BOOTSTRAP_PIP_SPEC=git+https://github.com/$CIRCLE_PROJECT_USERNAME/the-littlest-jupyterhub.git@$CIRCLE_SHA1
+            fi
+
+            .circleci/integration-test.py run-test \
+                --bootstrap-pip-spec "$BOOTSTRAP_PIP_SPEC" \
+                basic-tests test_hub.py test_proxy.py \
+                test_install.py test_extensions.py \
+                << parameters.upgrade >>
+
+  admin_tests:
+    parameters:
+      upgrade:
+        type: string
+        default: ""
+
+    steps:
+      - run:
+          name: Run admin tests
+          command: |
+            if [ $CIRCLE_PR_USERNAME ]; then
+                BOOTSTRAP_PIP_SPEC=git+https://github.com/$CIRCLE_PR_USERNAME/the-littlest-jupyterhub.git@$CIRCLE_SHA1
+            else
+                BOOTSTRAP_PIP_SPEC=git+https://github.com/$CIRCLE_PROJECT_USERNAME/the-littlest-jupyterhub.git@$CIRCLE_SHA1
+            fi
+
+            .circleci/integration-test.py run-test \
+                --installer-args "--admin admin:admin" \
+                --bootstrap-pip-spec $BOOTSTRAP_PIP_SPEC \
+                basic-tests test_admin_installer.py \
+                << parameters.upgrade >>
+
+  plugin_tests:
+    parameters:
+      upgrade:
+        type: string
+        default: ""
+
+    steps:
+      - run:
+          name: Run plugin tests
+          command: |
+            if [ $CIRCLE_PR_USERNAME ]; then
+                BOOTSTRAP_PIP_SPEC=git+https://github.com/$CIRCLE_PR_USERNAME/the-littlest-jupyterhub.git@$CIRCLE_SHA1
+            else
+                BOOTSTRAP_PIP_SPEC=git+https://github.com/$CIRCLE_PROJECT_USERNAME/the-littlest-jupyterhub.git@$CIRCLE_SHA1
+            fi
+
+            .circleci/integration-test.py run-test \
+                --bootstrap-pip-spec $BOOTSTRAP_PIP_SPEC \
+                --installer-args "--plugin /srv/src/integration-tests/plugins/simplest" \
+                plugins test_simplest_plugin.py \
+                << parameters.upgrade >>
+
+  bootstrap_checks:
+    steps:
+      - run:
+          name: Run bootstrap checks
+          command: |
+            py.test integration-tests/test_bootstrap.py -s
+
+
+jobs:
+  integration-test:
+    docker:
+      - image: docker:18.05.0-ce-git
+
+    steps:
+      - run:
+          name: setup python3
+          command: |
+            apk add --no-cache python3 pytest
+      - checkout
+      - setup_remote_docker
+      - build_systemd_image
+      - bootstrap_checks
+      - basic_tests
+      - admin_tests
+      - plugin_tests
+
+  upgrade-test:
+      docker:
+        - image: docker:18.05.0-ce-git
+
+      steps:
+        - run:
+            name: Check upgrade testing
+            command: |
+              if [ "$CIRCLE_BRANCH" == "master" ]; then
+                  echo "On master, no upgrade to test..."
+                  circleci-agent step halt
+              else
+                  echo "PR detected, testing upgrade..."
+              fi
+        - run:
+            name: setup python3
+            command: |
+              apk add --no-cache python3 pytest
+        - checkout
+        - setup_remote_docker
+        - build_systemd_image
+        - basic_tests:
+            upgrade: "--upgrade"
+        - admin_tests:
+            upgrade: "--upgrade"
+        - plugin_tests:
+            upgrade: "--upgrade"
+
+workflows:
+  version: 2
+  all-tests:
+    jobs:
+      - integration-test
+      - upgrade-test

docs/index.rst

@@ -17,8 +17,7 @@ might still make breaking changes that have no clear upgrade pathway.
 Installation
 ============
 
-The Littlest JupyterHub (TLJH) can run on any server that is running at least
-**Ubuntu 18.04**. Earlier versions of Ubuntu are not supported.
+The Littlest JupyterHub (TLJH) can run on any server that is running **Ubuntu 18.04** or **Ubuntu 20.04** on a amd64 or arm64 CPU architecture. Earlier versions of Ubuntu are not supported.
 We have a bunch of tutorials to get you started.
 
 - Tutorials to create a new server from scratch on a cloud provider & run TLJH

docs/topic/installer-actions.rst

@@ -30,7 +30,7 @@ of `traefik <http://traefik.io/>`_. This virtual environment is completely manag
 User environment
 ================
 
-By default, a ``miniconda`` environment is installed in ``/opt/tljh/user``. This contains
+By default, a ``mambaforge`` conda environment is installed in ``/opt/tljh/user``. This contains
 the notebook interface used to launch all users, and the various packages available to all
 users. The environment is owned by the ``root`` user. JupyterHub admins may use
 to ``sudo -E conda install`` or ``sudo -E pip install`` packages into this environment.

tests/test_conda.py

@@ -11,11 +11,15 @@
 @pytest.fixture(scope='module')
 def prefix():
     """
-    Provide a temporary directory with a conda environment
+    Provide a temporary directory with a mambaforge conda environment
     """
+    # see https://github.com/conda-forge/miniforge/releases
     mambaforge_version = '4.10.3-7'
-    installer_sha256 = "fc872522ec427fcab10167a93e802efaf251024b58cc27b084b915a9a73c4474"
-    installer_url = "https://github.com/conda-forge/miniforge/releases/download/{v}/Mambaforge-{v}-Linux-x86_64.sh".format(v=mambaforge_version)
+    if os.uname().machine == 'aarch64':
+        installer_sha256 = "ac95f137b287b3408e4f67f07a284357b1119ee157373b788b34e770ef2392b2"
+    elif os.uname().machine == 'x86_64':
+        installer_sha256 = "fc872522ec427fcab10167a93e802efaf251024b58cc27b084b915a9a73c4474"
+    installer_url = "https://github.com/conda-forge/miniforge/releases/download/{v}/Mambaforge-{v}-Linux-{arch}.sh".format(v=mambaforge_version, arch=os.uname().machine)
     with tempfile.TemporaryDirectory() as tmpdir:
         with conda.download_miniconda_installer(installer_url, installer_sha256) as installer_path:
             conda.install_miniconda(installer_path, tmpdir)

tljh/installer.py

@@ -170,7 +170,14 @@ def ensure_user_environment(user_requirements_txt_file):
     # Install mambaforge using an installer from
     # https://github.com/conda-forge/miniforge/releases
     mambaforge_new_version = '4.10.3-7'
-    installer_sha256 = "fc872522ec427fcab10167a93e802efaf251024b58cc27b084b915a9a73c4474"
+    # Check system architecture, set appropriate installer checksum
+    if os.uname().machine == 'aarch64':
+        installer_sha256 = "ac95f137b287b3408e4f67f07a284357b1119ee157373b788b34e770ef2392b2"
+    elif os.uname().machine == 'x86_64':
+        installer_sha256 = "fc872522ec427fcab10167a93e802efaf251024b58cc27b084b915a9a73c4474"
+    # Check OS, set appropriate string for conda installer path
+    if os.uname().sysname != 'Linux':
+        raise OSError("TLJH is only supported on Linux platforms.")
     # Then run `mamba --version` to get the conda and mamba versions
     # Keep these in sync with tests/test_conda.py::prefix
     mambaforge_conda_new_version = '4.10.3'
@@ -185,7 +192,7 @@ def ensure_user_environment(user_requirements_txt_file):
     # If no prior miniconda installation is found, we can install a newer version
     else:
         logger.info('Downloading & setting up user environment...')
-        installer_url = "https://github.com/conda-forge/miniforge/releases/download/{v}/Mambaforge-{v}-Linux-x86_64.sh".format(v=mambaforge_new_version)
+        installer_url = "https://github.com/conda-forge/miniforge/releases/download/{v}/Mambaforge-{v}-Linux-{arch}.sh".format(v=mambaforge_new_version, arch=os.uname().machine)
         with conda.download_miniconda_installer(installer_url, installer_sha256) as installer_path:
             conda.install_miniconda(installer_path, USER_ENV_PREFIX)
         conda_version = '4.10.3'

tljh/traefik.py

@@ -12,13 +12,21 @@
 from .config import CONFIG_DIR
 from tljh.configurer import load_config, _merge_dictionaries
 
-# FIXME: support more than one platform here
-plat = "linux-amd64"
-traefik_version = "1.7.18"
+# traefik 2.7.x is not supported yet, use v1.7.x for now
+# see: https://github.com/jupyterhub/traefik-proxy/issues/97
+machine = os.uname().machine
+if machine == 'aarch64':
+    plat = "linux-arm64"
+elif machine == 'x86_64':
+    plat = "linux-amd64"
+else:
+    raise OSError(f"Error. Platform: {os.uname().sysname} / {machine} Not supported.")
+traefik_version = "1.7.33"
 
 # record sha256 hashes for supported platforms here
 checksums = {
-    "linux-amd64": "3c2d153d80890b6fc8875af9f8ced32c4d684e1eb5a46d9815337cb343dfd92e"
+    "linux-amd64": "314ffeaa4cd8ed6ab7b779e9b6773987819f79b23c28d7ab60ace4d3683c5935",
+    "linux-arm64": "0640fa665125efa6b598fc08c100178e24de66c5c6035ce5d75668d3dc3706e1"
 }
 
 def checksum_file(path):
@@ -40,7 +48,7 @@ def fatal_error(e):
     giveup=fatal_error
 )
 def ensure_traefik_binary(prefix):
-    """Download and install the traefik binary"""
+    """Download and install the traefik binary to a location identified by a prefix path such as '/opt/tljh/hub/'"""
     traefik_bin = os.path.join(prefix, "bin", "traefik")
     if os.path.exists(traefik_bin):
         checksum = checksum_file(traefik_bin)
@@ -57,6 +65,7 @@ def ensure_traefik_binary(prefix):
         "https://github.com/containous/traefik/releases"
         f"/download/v{traefik_version}/traefik_{plat}"
     )
+
     print(f"Downloading traefik {traefik_version}...")
     # download the file
     response = requests.get(traefik_url)