Error while running a dockerized Airflow that uses Mesos as a distributed executor - FIXED

Dockerfile

FROM python:2.7-jessie
LABEL maintainer="Teralytics AG"
LABEL version=1

# Mesos-related image build-time arguments
ARG MESOS_VERSION=1.0.1
ARG MESOS_VERSION_QUALIFIER=2.0.93.debian81

# Airflow-related image build-time arguments
ARG AIRFLOW_VERSION=1.8.1
ARG AIRFLOW_PKG=apache-airflow
ARG AIRFLOW_EXTRAS=crypto:jdbc:hdfs:hive:postgres:slack

# Install Mesos and Airflow dependencies
RUN echo "deb http://repos.mesosphere.io/debian/ jessie main" > /etc/apt/sources.list.d/mesosphere.list && \
  apt-key adv --keyserver keyserver.ubuntu.com --recv E56151BF && \
  apt-get -y update && \
  apt-get -y install python-pandas mesos="$MESOS_VERSION"-"$MESOS_VERSION_QUALIFIER" && \
  apt-get clean && rm -rf /var/lib/apt/lists/* && \
  cp /usr/lib/python2.7/site-packages/mesos* -r /usr/local/lib/python2.7/site-packages/

# Install Airflow
RUN pip install "$AIRFLOW_PKG"=="$AIRFLOW_VERSION"

# Install extra package for Airflow
RUN echo "$AIRFLOW_EXTRAS" | tr ':' '\n' | xargs -i@ pip install "$AIRFLOW_PKG"[@]=="$AIRFLOW_VERSION"

# Default command for the container: run both the scheduler and the webserver
ENTRYPOINT airflow initdb && airflow scheduler & airflow webserver

stderr

Traceback (most recent call last):
  File "/usr/local/bin/airflow", line 17, in <module>
    from airflow import configuration
  File "/usr/local/lib/python2.7/site-packages/airflow/__init__.py", line 31, in <module>
    from airflow.models import DAG
  File "/usr/local/lib/python2.7/site-packages/airflow/models.py", line 63, in <module>
    from airflow.executors import DEFAULT_EXECUTOR, LocalExecutor
  File "/usr/local/lib/python2.7/site-packages/airflow/executors/__init__.py", line 47, in <module>
    from airflow.contrib.executors.mesos_executor import MesosExecutor
  File "/usr/local/lib/python2.7/site-packages/airflow/contrib/executors/mesos_executor.py", line 23, in <module>
    import mesos.native
ImportError: No module named native
Traceback (most recent call last):
  File "/usr/local/bin/airflow", line 17, in <module>
    from airflow import configuration
  File "/usr/local/lib/python2.7/site-packages/airflow/__init__.py", line 31, in <module>
    from airflow.models import DAG
  File "/usr/local/lib/python2.7/site-packages/airflow/models.py", line 63, in <module>
    from airflow.executors import DEFAULT_EXECUTOR, LocalExecutor
  File "/usr/local/lib/python2.7/site-packages/airflow/executors/__init__.py", line 47, in <module>
    from airflow.contrib.executors.mesos_executor import MesosExecutor
  File "/usr/local/lib/python2.7/site-packages/airflow/contrib/executors/mesos_executor.py", line 23, in <module>
    import mesos.native
ImportError: No module named native

Hey stefan, what are you achieving by doing:
cp /usr/lib/python2.7/site-packages/mesos* -r /usr/local/lib/python2.7/site-packages/