inistal commit of dockers, basic all-in-one setup

dockers/docker-compose.yaml

+# 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.
+#
+
+# Basic Airflow cluster configuration for CeleryExecutor with Redis and PostgreSQL.
+#
+# WARNING: This configuration is for local development. Do not use it in a production deployment.
+#
+# This configuration supports basic configuration using environment variables or an .env file
+# The following variables are supported:
+#
+# AIRFLOW_IMAGE_NAME           - Docker image name used to run Airflow.
+#                                Default: apache/airflow:master-python3.8
+# AIRFLOW_UID                  - User ID in Airflow containers
+#                                Default: 50000
+# AIRFLOW_GID                  - Group ID in Airflow containers
+#                                Default: 50000
+#
+# Those configurations are useful mostly in case of standalone testing/running Airflow in test/try-out mode
+#
+# _AIRFLOW_WWW_USER_USERNAME   - Username for the administrator account (if requested).
+#                                Default: airflow
+# _AIRFLOW_WWW_USER_PASSWORD   - Password for the administrator account (if requested).
+#                                Default: airflow
+# _PIP_ADDITIONAL_REQUIREMENTS - Additional PIP requirements to add when starting all containers.
+#                                Default: ''
+#
+# Feel free to modify this file to suit your needs.
+---
+version: '2.4'
+x-airflow-common:
+  &airflow-common
+  image: ${AIRFLOW_IMAGE_NAME:-apache/airflow:2.1.2}
+  environment:
+    &airflow-common-env
+    AIRFLOW__CORE__EXECUTOR: CeleryExecutor
+    AIRFLOW__CORE__SQL_ALCHEMY_CONN: postgresql+psycopg2://airflow:airflow@postgres/airflow
+    AIRFLOW__CELERY__RESULT_BACKEND: db+postgresql://airflow:airflow@postgres/airflow
+    AIRFLOW__CELERY__BROKER_URL: redis://:@redis:6379/0
+    AIRFLOW__CORE__FERNET_KEY: ''
+    AIRFLOW__CORE__DAGS_ARE_PAUSED_AT_CREATION: 'true'
+    AIRFLOW__CORE__LOAD_EXAMPLES: 'true'
+    AIRFLOW__API__AUTH_BACKEND: 'airflow.api.auth.backend.basic_auth'
+    _PIP_ADDITIONAL_REQUIREMENTS: ${_PIP_ADDITIONAL_REQUIREMENTS:-}
+  volumes:
+    - ./dags:/opt/airflow/dags
+    - ./logs:/opt/airflow/logs
+    - ./plugins:/opt/airflow/plugins
+  user: "${AIRFLOW_UID:-50000}:${AIRFLOW_GID:-50000}"
+  depends_on:
+    redis:
+      condition: service_healthy
+    postgres:
+      condition: service_healthy
+
+services:
+  postgres:
+    image: postgres:13
+    environment:
+      POSTGRES_USER: airflow
+      POSTGRES_PASSWORD: airflow
+      POSTGRES_DB: airflow
+    volumes:
+      - postgres-db-volume:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD", "pg_isready", "-U", "airflow"]
+      interval: 5s
+      retries: 5
+    restart: always
+
+  redis:
+    image: redis:latest
+    ports:
+      - 6379:6379
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 5s
+      timeout: 30s
+      retries: 50
+    restart: always
+
+  airflow-webserver:
+    <<: *airflow-common
+    command: webserver
+    ports:
+      - 7001:8080
+    healthcheck:
+      test: ["CMD", "curl", "--fail", "http://localhost:7001/health"]
+      interval: 10s
+      timeout: 10s
+      retries: 5
+    restart: always
+
+  airflow-scheduler:
+    <<: *airflow-common
+    command: scheduler
+    healthcheck:
+      test: ["CMD-SHELL", 'airflow jobs check --job-type SchedulerJob --hostname "$${HOSTNAME}"']
+      interval: 10s
+      timeout: 10s
+      retries: 5
+    restart: always
+
+  airflow-worker:
+    <<: *airflow-common
+    command: celery worker
+    healthcheck:
+      test:
+        - "CMD-SHELL"
+        - 'celery --app airflow.executors.celery_executor.app inspect ping -d "celery@$${HOSTNAME}"'
+      interval: 10s
+      timeout: 10s
+      retries: 5
+    restart: always
+
+  airflow-init:
+    <<: *airflow-common
+    command: version
+    environment:
+      <<: *airflow-common-env
+      _AIRFLOW_DB_UPGRADE: 'true'
+      _AIRFLOW_WWW_USER_CREATE: 'true'
+      _AIRFLOW_WWW_USER_USERNAME: ${_AIRFLOW_WWW_USER_USERNAME:-airflow}
+      _AIRFLOW_WWW_USER_PASSWORD: ${_AIRFLOW_WWW_USER_PASSWORD:-airflow}
+
+  flower:
+    <<: *airflow-common
+    command: celery flower
+    ports:
+      - 5555:5555
+    healthcheck:
+      test: ["CMD", "curl", "--fail", "http://localhost:5555/"]
+      interval: 10s
+      timeout: 10s
+      retries: 5
+    restart: always
+
+volumes:
+  postgres-db-volume:

dockers/install.md

+== Setup instance
+Based on Christians cloud-init file:
+#cloud-config
+
+# upgrade packages
+package_upgrade: true
+
+# install relevant packages
+packages:
+  - python3
+  - python3-pip
+  - docker.io
+  - docker-compose
+
+runcmd:
+  - usermod -aG docker ubuntu
+
+Think about the security group for the isntance (e.g. to enable access to webgut 7001 port should be open). There is airflows group in HDF. 
+
+== Prepare env
+mkdir ./dags ./logs ./plugins
+echo -e "AIRFLOW_UID=$(id -u)\nAIRFLOW_GID=0" > .env
+docker-compose up airflow-init
+
+== Start-up
+docker-compose up -d