Feat: enable DockerOperator usage (#4)

* mount docker.sock & set perms; required for DockerOperator usage 🧦

* Move docker/.env into docker/.env.example

.gitignore

@@ -5,3 +5,4 @@ dags/**/*.pyc
 /logs
 /db-data
 .DS_Store
+/docker/.env

docker/.env → docker/.env.example

@@ -3,4 +3,5 @@ DAGS_HOME=""
 PLUGINS_HOME=""
 REQS_HOME=""
 STARTUP_HOME=""
-RIKOLTI_DATA_HOME=""
+RIKOLTI_DATA_HOME=""
+DOCKER_SOCKET=""

docker/docker-compose-local.yml

@@ -31,6 +31,7 @@ services:
       - "${REQS_HOME}:/usr/local/airflow/requirements"
       - "${STARTUP_HOME}:/usr/local/airflow/startup"
       - "${RIKOLTI_DATA_HOME}:/usr/local/airflow/rikolti_data"
+      - "${DOCKER_SOCKET}:/var/run/docker.sock"
     ports:
       - "8080:8080"
     command: local-runner

docker/script/run-startup.sh

@@ -1,4 +1,8 @@
 #!/usr/bin/env bash
 
 source "$AIRFLOW_HOME/startup/startup.sh"
-declare -p | grep -v '^declare \-[aAilnrtux]*r ' > stored_env
+declare -p | grep -v '^declare \-[aAilnrtux]*r ' > stored_env
+
+# allows the airflow user on the airflow docker container to access 
+# the host's docker.sock. This is needed for the DockerOperator to work.
+sudo chmod 666 /var/run/docker.sock