Install rearc requirements at build time instead of launch time... th…

…is doesn't remove the check at runtime, to match cloud mwaa, but it does speed up restarts a LOT.

docker/Dockerfile

@@ -48,6 +48,11 @@ RUN chmod +x /entrypoint.sh
 
 EXPOSE 8080 5555 8793
 
+# Rearc requirements
+COPY config/rearc-constraints.txt /rearc-requirements/constraints.txt
+COPY config/rearc-requirements.txt /rearc-requirements/requirements.txt
+RUN pip3 install $PIP_OPTION -r /rearc-requirements/requirements.txt
+
 #USER airflow
 WORKDIR ${AIRFLOW_USER_HOME}
 ENTRYPOINT ["/entrypoint.sh"]

docker/config/.gitignore

@@ -0,0 +1,2 @@
+rearc-constraints.txt
+rearc-requirements.txt

docker/config/airflow.cfg

@@ -387,6 +387,7 @@ default_cpus = 1
 default_ram = 512
 default_disk = 512
 default_gpus = 0
+default_deferrable = True
 
 # Default queue that tasks get assigned to and that worker listen on.
 default_queue = default