Bring Your Own Resources

.gitignore

@@ -28,3 +28,4 @@ src/*
 # py.test's .cache/ directory
 .cache/*
 .idea/*
+.vscode/*

etc/byor_config.py

@@ -0,0 +1,9 @@
+c = get_config()
+load_subconfig('etc/base_config.py')
+load_subconfig('etc/github_auth.py')
+
+c.JupyterHub.spawner_class = 'everware.ByorDockerSpawner'
+
+from os.path import join as pjoin
+with open(pjoin(c.JupyterHub.template_paths[0], '_byor_options_form.html')) as form:
+    c.ByorDockerSpawner.options_form = form.read()

everware/__init__.py

@@ -1,5 +1,6 @@
 __version__ = "0.11.0"
 from .spawner import *
+from .byor_spawner import *
 from .authenticator import *
 from .user_spawn_handler import *
 from .user_wait_handler import *

everware/byor_spawner.py

@@ -0,0 +1,82 @@
+import docker
+from docker.errors import DockerException
+from traitlets import Int
+from tornado import gen
+
+from .spawner import CustomDockerSpawner
+
+
+class ByorDockerSpawner(CustomDockerSpawner):
+    def __init__(self, **kwargs):
+        self._byor_client = None
+        CustomDockerSpawner.__init__(self, **kwargs)
+
+    @property
+    def client(self):
+        if self._byor_client is not None:
+            return self._byor_client
+        return super(ByorDockerSpawner, self).client
+
+    @property
+    def byor_is_used(self):
+        return self.user_options.get('byor_is_needed', False)
+
+    def _reset_byor(self):
+        self.container_ip = str(self.__class__.container_ip)
+        self._byor_client = None
+
+    byor_timeout = Int(20, min=1, config=True,
+                       help='Timeout for connection to BYOR Docker daemon')
+
+    def options_from_form(self, formdata):
+        options = {}
+        options['byor_is_needed'] = formdata.pop('byor_is_needed', [''])[0].strip() == 'on'
+        for field in ('byor_docker_ip', 'byor_docker_port'):
+            options[field] = formdata.pop(field, [''])[0].strip()
+        options.update(
+            super(ByorDockerSpawner, self).options_from_form(formdata)
+        )
+        return options
+
+    @gen.coroutine
+    def _configure_byor(self):
+        """Configure BYOR settings or reset them if BYOR is not needed."""
+        if not self.byor_is_used:
+            self._reset_byor()
+            return
+        byor_ip = self.user_options['byor_docker_ip']
+        byor_port = self.user_options['byor_docker_port']
+        try:
+            # version='auto' causes a connection to the daemon.
+            # That's why the method must be a coroutine.
+            self._byor_client = docker.Client('{}:{}'.format(byor_ip, byor_port),
+                                              version='auto',
+                                              timeout=self.byor_timeout)
+        except DockerException as e:
+            self._is_failed = True
+            message = str(e)
+            if 'ConnectTimeoutError' in message:
+                log_message = 'Connection to the Docker daemon took too long (> {} secs)'.format(
+                    self.byor_timeout
+                )
+                notification_message = 'BYOR timeout limit {} exceeded'.format(self.byor_timeout)
+            else:
+                log_message = "Failed to establish connection with the Docker daemon"
+                notification_message = log_message
+            self._add_to_log(log_message, level=2)
+            yield self.notify_about_fail(notification_message)
+            self._is_building = False
+            raise
+
+        self.container_ip = byor_ip
+
+    @gen.coroutine
+    def _prepare_for_start(self):
+        super(ByorDockerSpawner, self)._prepare_for_start()
+        yield self._configure_byor()
+
+    @gen.coroutine
+    def start(self, image=None):
+        yield self._prepare_for_start()
+        ip_port = yield self._start(image)
+        return ip_port

everware/spawner.py

@@ -58,7 +58,6 @@ def executor(self):
 
     def _docker(self, method, *args, **kwargs):
         """wrapper for calling docker methods
-
         to be passed to ThreadPoolExecutor
         """
         # methods that return a generator object return instantly
@@ -320,7 +319,6 @@ def generate_image_name(self):
             self.commit_sha
         )
 
-
     @gen.coroutine
     def remove_old_container(self):
         try:
@@ -333,14 +331,16 @@ def remove_old_container(self):
         except APIError as e:
             self.log.info("Can't erase container %s due to %s" % (self.container_name, e))
 
-    @gen.coroutine
-    def start(self, image=None):
-        """start the single-user server in a docker container"""
+    def _prepare_for_start(self):
         self._user_log = []
         self._is_up = False
         self._is_failed = False
         self._is_building = True
         self._is_empty = False
+
+    @gen.coroutine
+    def _start(self, image):
+        """start the single-user server in a docker container"""
         try:
             f = self.build_image()
             image_name = yield gen.with_timeout(
@@ -393,9 +393,14 @@ def start(self, image=None):
         return self.user.server.ip, self.user.server.port  # jupyterhub 0.7 prefers returning ip, port
 
     @gen.coroutine
+    def start(self, image=None):
+        self._prepare_for_start()
+        ip_port = yield self._start(image)
+        return ip_port
+
+    @gen.coroutine
     def stop(self, now=False):
         """Stop the container
-
         Consider using pause/unpause when docker-py adds support
         """
         self._is_empty = True

share/static/html/_byor_options_form.html

@@ -0,0 +1,85 @@
+<div style="margin-bottom: 0px;">
+<div class="mdl-textfield mdl-js-textfield mdl-textfield--floating-label" style="width: 50%;">
+<input
+    id="repository_input"
+    type="text"
+    autocapitalize="off"
+    autocorrect="off"
+    name="repository_url"
+    tabindex="1"
+    autofocus="autofocus"
+    class="mdl-textfield__input"
+style="margin-bottom: 3px;" />
+<label class="mdl-textfield__label" for="repository_input">Git repository</label>
+</div>
+
+<label for="need_remove" class="mdl-checkbox mdl-js-checkbox mdl-js-ripple-effect" >
+<input type="checkbox"
+        name="need_remove"
+        class="mdl-checkbox__input"
+        id="need_remove"
+        checked />
+<span class="mdl-checkbox__label">Remove previous container if it exists</span>
+</label>
+
+<label for="byor_is_needed" class="mdl-checkbox mdl-js-checkbox mdl-js-ripple-effect" >
+<input type="checkbox"
+        name="byor_is_needed"
+        class="mdl-checkbox__input"
+        id="byor_is_needed"
+        unchecked />
+<span class="mdl-checkbox__label">I want to run the repository on my own server</span>
+</label>
+<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
+<script>
+window.onload = function () {
+    byor_is_needed = document.getElementById("byor_is_needed");
+    byor_input = document.getElementById("byor_input");
+    if (byor_is_needed.checked) {
+        byor_input.style.display = "inline";
+    } else {
+        byor_input.style.display = "none";
+    }
+}
+$('#byor_is_needed').on('change', function() {
+    $('#byor_input').toggle(speed='normal');
+});
+</script>
+
+<div id='byor_input' style="display: none;">
+<p style="margin-bottom: 0px;">
+    For a successful run <a href="https://www.docker.com/" target="_black">Docker</a>
+    must be installed on your server.<br />
+    Enter IP address and port of the Docker daemon running on your server.<br />
+    (Click <a href="https://docs.docker.com/engine/reference/commandline/dockerd/#daemon-socket-option"
+            target="_blank">
+    here</a> to learn how to run Docker daemon on a particular port)
+</p>
+<div class="mdl-textfield mdl-js-textfield mdl-textfield--floating-label"
+        style="width: 9%; margin-right: 20px;">
+    <input
+    id="byor_docker_ip"
+    type="text"
+    autocapitalize="off"
+    autocorrect="off"
+    name="byor_docker_ip"
+    tabindex="1"
+    autofocus="autofocus"
+    class="mdl-textfield__input"/>
+    <label class="mdl-textfield__label" for="byor_docker_ip">ip</label>
+</div>
+<div class="mdl-textfield mdl-js-textfield mdl-textfield--floating-label"
+        style="width: 9%;">
+    <input
+    id="byor_docker_port"
+    type="text"
+    autocapitalize="off"
+    autocorrect="off"
+    name="byor_docker_port"
+    tabindex="1"
+    autofocus="autofocus"
+    class="mdl-textfield__input"/>
+    <label class="mdl-textfield__label" for="byor_docker_port">port</label>
+</div>
+</div>
+</div>