[docker] introduce a pulsar standalone image (apache#2545)

## Motivation

`pulsar` and `pulsar-all` are designed for running pulsar components on production.
although it can be used for running standalone, people still need to run a separate docker container for pulsar dashboard.

 ## Changes

introduce a `pulsar-standalone` image to package everything into one image. so people can run launch a pulsar standalone in one line command
in docker, including dashboard.

docker/pom.xml

@@ -38,5 +38,6 @@
     <module>pulsar</module>
     <module>grafana</module>
     <module>pulsar-all</module>
+    <module>pulsar-standalone</module>
   </modules>
 </project>

docker/pulsar-standalone/Dockerfile

@@ -0,0 +1,55 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+FROM apachepulsar/pulsar-all:latest
+
+RUN apt-get update
+RUN apt-get -y install postgresql sudo nginx supervisor
+
+# Python dependencies
+RUN pip install uwsgi 'Django<2.0' psycopg2 pytz requests
+
+# Postgres configuration
+COPY conf/postgresql.conf /etc/postgresql/9.6/main/
+
+# Configure nginx and supervisor
+RUN echo "daemon off;" >> /etc/nginx/nginx.conf
+COPY conf/nginx-app.conf /etc/nginx/sites-available/default
+COPY conf/supervisor-app.conf /etc/supervisor/conf.d/
+
+# Copy web-app sources
+COPY . /pulsar/
+
+# Setup database and create tables
+RUN sudo -u postgres /etc/init.d/postgresql start && \
+    sudo -u postgres psql --command "CREATE USER docker WITH PASSWORD 'docker';" && \
+    sudo -u postgres createdb -O docker pulsar_dashboard && \
+    cd /pulsar/django && \
+    ./manage.py migrate && \
+    sudo -u postgres /etc/init.d/postgresql stop
+
+# Collect all static files needed by Django in a
+# single place. Needed to run the app outside the
+# Django test web server
+RUN cd /pulsar/django && ./manage.py collectstatic --no-input
+
+ENV SERVICE_URL http://127.0.0.1:8080
+EXPOSE 80
+
+CMD ["supervisord", "-n"]

docker/pulsar-standalone/conf/nginx-app.conf

@@ -0,0 +1,37 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+upstream django {
+    server unix:/tmp/uwsgi.sock;
+}
+
+server {
+    listen      80 default_server;
+
+    charset     utf-8;
+
+    location /static {
+        alias /pulsar/django/static;
+    }
+
+    location / {
+        uwsgi_pass  django;
+        include     /pulsar/conf/uwsgi_params;
+    }
+}

docker/pulsar-standalone/conf/postgresql.conf

@@ -0,0 +1,38 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+# Relax durability to increase write throughput
+fsync = off
+full_page_writes = off
+synchronous_commit = off
+
+# Default configs
+data_directory = '/var/lib/postgresql/9.6/main'
+hba_file = '/etc/postgresql/9.6/main/pg_hba.conf'
+ident_file = '/etc/postgresql/9.6/main/pg_ident.conf'
+external_pid_file = '/var/run/postgresql/9.6-main.pid'
+
+port = 5432
+max_connections = 100
+
+datestyle = 'iso, mdy'
+default_text_search_config = 'pg_catalog.english'
+stats_temp_directory = '/var/run/postgresql/9.6-main.pg_stat_tmp'
+timezone = 'UTC'
+log_timezone = 'UTC'

docker/pulsar-standalone/conf/supervisor-app.conf

@@ -0,0 +1,34 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+[program:postgres]
+command = /usr/lib/postgresql/9.6/bin/postgres -D /etc/postgresql/9.6/main
+user = postgres
+
+[program:uwsgi]
+command = /usr/local/bin/uwsgi --ini /pulsar/conf/uwsgi.ini
+
+[program:nginx]
+command = /usr/sbin/nginx
+
+[program:collector]
+command = /pulsar/django/collector.sh
+
+[program:pulsar]
+command = /pulsar/bin/pulsar standalone

docker/pulsar-standalone/conf/uwsgi.ini

@@ -0,0 +1,45 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+# django.ini file
+[uwsgi]
+
+uid  = www-data
+gid  = www-data
+
+# master
+master                  = true
+
+# maximum number of processes
+processes               = 10
+
+# the socket (use the full path to be safe)
+socket          = /tmp/uwsgi.sock
+
+# with appropriate permissions - *may* be needed
+# chmod-socket    = 664
+
+# the base directory
+chdir           = /pulsar/django
+
+# Django's wsgi file
+module          = dashboard.wsgi
+
+# clear environment on exit
+vacuum          = true

docker/pulsar-standalone/conf/uwsgi_params

@@ -0,0 +1,16 @@
+
+uwsgi_param  QUERY_STRING       $query_string;
+uwsgi_param  REQUEST_METHOD     $request_method;
+uwsgi_param  CONTENT_TYPE       $content_type;
+uwsgi_param  CONTENT_LENGTH     $content_length;
+
+uwsgi_param  REQUEST_URI        $request_uri;
+uwsgi_param  PATH_INFO          $document_uri;
+uwsgi_param  DOCUMENT_ROOT      $document_root;
+uwsgi_param  SERVER_PROTOCOL    $server_protocol;
+uwsgi_param  HTTPS              $https if_not_empty;
+
+uwsgi_param  REMOTE_ADDR        $remote_addr;
+uwsgi_param  REMOTE_PORT        $remote_port;
+uwsgi_param  SERVER_PORT        $server_port;
+uwsgi_param  SERVER_NAME        $server_name;