[postgres] schema violation (fields: expected an array)

[ssaldarriaga]

I'm trying to configure the openwhisk plugin with Kong 2.0.5 and docker; when I restart the container I see in the container logs the next error:

init_by_lua error: /usr/local/share/lua/5.1/kong/init.lua:446: error loading plugin schemas: on plugin 'openwhisk': [postgres] schema violation (fields: expected an array)
stack traceback:
        [C]: in function 'assert'
        /usr/local/share/lua/5.1/kong/init.lua:446: in function 'init'
        init_by_lua:3: in main chunk

This is my docker-compose:

version: "3.7"

volumes:
  kong_data: {}

networks:
 kong-net:

services:

  #######################################
  # Postgres: The database used by Kong
  #######################################
  kong-database:
    image: postgres:9.6
    container_name: kong-postgres
    restart: on-failure
    networks:
      - kong-net
    volumes:
      - kong_data:/var/lib/postgresql/data
    environment:
      POSTGRES_USER: kong
      POSTGRES_PASSWORD: ${KONG_PG_PASSWORD:-kong}
      POSTGRES_DB: kong
    ports:
      - "5432:5432"
    healthcheck:
      test: ["CMD", "pg_isready", "-U", "kong"]
      interval: 30s
      timeout: 30s
      retries: 3

  #######################################
  # Kong database migration
  #######################################
  kong-migration:
    image: ${KONG_DOCKER_TAG:-kong:2.0.5}
    command: kong migrations bootstrap
    networks:
      - kong-net
    restart: on-failure
    environment:
      KONG_DATABASE: postgres
      KONG_PG_HOST: kong-database
      KONG_PG_DATABASE: kong
      KONG_PG_USER: kong
      KONG_PG_PASSWORD: ${KONG_PG_PASSWORD:-kong}
    depends_on:
      - kong-database

  #######################################
  # Kong: The API Gateway
  #######################################
  kong:
    image: ${KONG_DOCKER_TAG:-kong:2.0.5}
    restart: on-failure
    networks:
      - kong-net
    environment:
      KONG_DATABASE: postgres
      KONG_PG_HOST: kong-database
      KONG_PG_DATABASE: kong
      KONG_PG_USER: kong
      KONG_PG_PASSWORD: ${KONG_PG_PASSWORD:-kong}
      KONG_PROXY_LISTEN: 0.0.0.0:8000
      KONG_PROXY_LISTEN_SSL: 0.0.0.0:8443
      KONG_ADMIN_LISTEN: 0.0.0.0:8001
    depends_on:
      - kong-database
    healthcheck:
      test: ["CMD", "kong", "health"]
      interval: 10s
      timeout: 10s
      retries: 10
    ports:
      - "8000:8000"
      - "8001:8001"
      - "8443:8443"
      - "8444:8444"