Add simple deployment example using docker compose

Dockerfile

@@ -0,0 +1,35 @@
+FROM ubuntu:xenial
+
+RUN apt-get update && \
+  apt-get install -qy software-properties-common python-software-properties && \
+  apt-get update && apt-get install -qy \
+    build-essential \
+    wget \
+    python \
+    libffi-dev \
+    libssl-dev \
+    libjpeg-dev \
+    zlib1g-dev \
+    libpython-dev && \
+  apt-get clean && rm -rf /var/lib/apt/lists/*
+
+RUN wget https://bootstrap.pypa.io/get-pip.py && python get-pip.py
+
+WORKDIR /girder_worker
+COPY setup.py /girder_worker/setup.py
+COPY requirements.txt /girder_worker/requirements.txt
+COPY README.rst /girder_worker/README.rst
+COPY examples /girder_worker/examples
+COPY scripts /girder_worker/scripts
+COPY girder_worker /girder_worker/girder_worker
+
+RUN pip install -r requirements.txt -e .
+
+RUN useradd -D --shell=/bin/bash && useradd -m worker
+RUN sed -i girder_worker/worker.local.cfg \
+   -e '/^broker/ s/guest@localhost/%(RABBITMQ_USER)s:%(RABBITMQ_PASS)s@%(RABBITMQ_HOST)s/'
+RUN girder-worker-config set girder_worker tmp_root /tmp
+
+USER worker
+
+ENTRYPOINT ["python", "-m", "girder_worker"]

docker-compose.yml

@@ -0,0 +1,15 @@
+version: '2'
+
+
+services:
+   broker:
+      image: rabbitmq:3
+      env_file: ./docker.env
+
+   worker:
+      build:
+         context: .
+         dockerfile: Dockerfile
+      links:
+         - broker:broker
+      env_file: ./docker.env

docker.env

@@ -0,0 +1,5 @@
+RABBITMQ_DEFAULT_USER=user
+RABBITMQ_DEFAULT_PASS=password
+RABBITMQ_USER=user
+RABBITMQ_PASS=password
+RABBITMQ_HOST=broker

girder_worker/__init__.py

@@ -6,7 +6,7 @@
 
 from girder_worker.format import (
     converter_path, get_validator_analysis, Validator)
-from ConfigParser import ConfigParser
+from ConfigParser import SafeConfigParser
 from executors.python import run as python_run
 from executors.workflow import run as workflow_run
 from networkx import NetworkXNoPath
@@ -16,7 +16,7 @@
 
 # Read the configuration files
 _cfgs = ('worker.dist.cfg', 'worker.local.cfg')
-config = ConfigParser()
+config = SafeConfigParser(os.environ)
 config.read([os.path.join(PACKAGE_DIR, f) for f in _cfgs])
 
 # Maps task modes to their implementation