migration_python.yaml

---
replicated_api_version: 1.3.2
name: Migration Example
version: "1"
properties:
  console_title: "Basic Python App"
cmds:
- name: generate_pw
  cmd: random
  args:
  - "32"
components:
- name: db
  containers:
  - source: public
    image_name: postgres
    version: 9.5
    env_vars:
    - name: POSTGRES_DB
      static_val: pythonapp
    - name: POSTGRES_USER
      static_val: 'pythonapp_user'
    - name: POSTGRES_PASSWORD
      static_val: '{{repl ConfigOption "postgres_pw" }}'
    volumes:
    - host_path: /data/postgresql/data
      container_path: /var/lib/postgresql/data
    ports:
    - private_port: "5432"
      public_port: "5432"
      port_type: tcp
    publish_events:
    - name: Postgres started and waiting for connections
      trigger: port-listen
      data: "5432"
      subscriptions:
      - component: db-migration
        container: pythonapp
        action: start
- name: db-migration
  containers:
  - source: replicated
    image_name: pythonapp
    version: 1.4.2
    ephemeral: true
    env_vars:
      - name: DB_URL
        static_val: "postgresql://pythonapp:{{repl ConfigOption \"postgres_pw\"}}@{{repl HostPrivateIpAddress \"db\" \"postgres\" }}:{{repl ContainerExposedPort \"db\" \"postgres\" \"5432\"}}/pythonapp"
    cmd: '["python", "manage.py", "db", "upgrade"]'
    publish_events:
    - name: db migration complete
      trigger: container-stop
      data: ""
      subscriptions:
      - component: python-app
        container: pythonapp
        action: start
- name: python-app
  containers:
  - source: replicated
    image_name: pythonapp
    version: 1.4.2
    cmd: '["python", "manage.py", "app", "start"]'
    env_vars:
      - name: DB_URL
        static_val: "postgresql://pythonapp:{{repl ConfigOption \"postgres_pw\"}}@{{repl HostPrivateIpAddress \"db\" \"postgres\" }}:{{repl ContainerExposedPort \"db\" \"postgres\" \"5432\"}}/pythonapp"
config:
- name: database
  title: Database Settings
  description: Setup your local postgres server
  items:
  - name: postgres_pw
    title: Postgres Password
    type: text
    recommended: false
    default: ""
    value_cmd:
      name: generate_pw
      value_at: 0
    required: true