docker-compose.yml

version: '3.9'

x-kong-config:
  &kong-env
  KONG_DATABASE: ${KONG_DATABASE:-postgres}
  KONG_PG_DATABASE: ${KONG_PG_DATABASE:-kong}
  KONG_PG_HOST: db
  KONG_PG_USER: ${KONG_PG_USER:-kong}
  KONG_PG_PASSWORD_FILE: /run/secrets/kong_postgres_password

volumes:
  kong_data: {}
  kong_prefix_vol:
    driver_opts:
      type: tmpfs
      device: tmpfs
  kong_tmp_vol:
    driver_opts:
      type: tmpfs
      device: tmpfs

networks:
  kong-net:
    external: false

services:
  kong-migrations:
    image: "${KONG_DOCKER_TAG:-kong:latest}"
    command: kong migrations bootstrap
    profiles: [ "database" ]
    depends_on:
      - db
    environment:
      <<: *kong-env
    secrets:
      - kong_postgres_password
    networks:
      - kong-net
    restart: on-failure

  kong:
    image: "${KONG_DOCKER_TAG:-kong:latest}"
    user: "${KONG_USER:-kong}"
    environment:
      <<: *kong-env
      KONG_ADMIN_ACCESS_LOG: /dev/stdout
      KONG_ADMIN_ERROR_LOG: /dev/stderr
      KONG_PROXY_LISTEN: "${KONG_PROXY_LISTEN:-0.0.0.0:8000}"
      KONG_ADMIN_LISTEN: "${KONG_ADMIN_LISTEN:-0.0.0.0:8001}"
      KONG_ADMIN_GUI_LISTEN: "${KONG_ADMIN_GUI_LISTEN:-0.0.0.0:8002}"
      KONG_PROXY_ACCESS_LOG: /dev/stdout
      KONG_PROXY_ERROR_LOG: /dev/stderr
      KONG_PREFIX: ${KONG_PREFIX:-/var/run/kong}
      KONG_DECLARATIVE_CONFIG: "/opt/kong/kong.yaml"
    secrets:
      - kong_postgres_password
    networks:
      - kong-net
    ports:
      # The following two environment variables default to an insecure value (0.0.0.0)
      # according to the CIS Security test.
      - "${KONG_INBOUND_PROXY_LISTEN:-0.0.0.0}:8000:8000/tcp"
      - "${KONG_INBOUND_SSL_PROXY_LISTEN:-0.0.0.0}:8443:8443/tcp"
      # Making them mandatory but undefined, like so would be backwards-breaking:
      # - "${KONG_INBOUND_PROXY_LISTEN?Missing inbound proxy host}:8000:8000/tcp"
      # - "${KONG_INBOUND_SSL_PROXY_LISTEN?Missing inbound proxy ssl host}:8443:8443/tcp"
      # Alternative is deactivating check 5.13 in the security bench, if we consider Kong's own config to be enough security here

      - "127.0.0.1:8001:8001/tcp"
      - "127.0.0.1:8444:8444/tcp"
      - "127.0.0.1:8002:8002/tcp"
    healthcheck:
      test: [ "CMD", "kong", "health" ]
      interval: 10s
      timeout: 10s
      retries: 10
    restart: on-failure:5
    read_only: true
    volumes:
      - kong_prefix_vol:${KONG_PREFIX:-/var/run/kong}
      - kong_tmp_vol:/tmp
      - ./kong/config:/opt/kong
    security_opt:
      - no-new-privileges

  db:
    image: postgres:9.5
    profiles: [ "database" ]
    environment:
      POSTGRES_DB: ${KONG_PG_DATABASE:-kong}
      POSTGRES_USER: ${KONG_PG_USER:-kong}
      POSTGRES_PASSWORD_FILE: /run/secrets/kong_postgres_password
    secrets:
      - kong_postgres_password
    healthcheck:
      test:
        [
          "CMD",
          "pg_isready",
          "-d",
          "${KONG_PG_DATABASE:-kong}",
          "-U",
          "${KONG_PG_USER:-kong}"
        ]
      interval: 30s
      timeout: 30s
      retries: 3
    restart: on-failure
    stdin_open: true
    tty: true
    networks:
      - kong-net
    volumes:
      - kong_data:/var/lib/postgresql/data
      - ./kong/backup:/backup

  prometheus:
    image: prom/prometheus:latest
    volumes:
      - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
      - ./prometheus/data:/prometheus
    networks:
      - kong-net
    ports:
      - "9090:9090"
    depends_on:
      - kong
    restart: always
  
# SSH-based proxies
  proxy-kisski:
    build: ./proxy-hpc
    image: proxy-hpc:latest
    secrets:
      - kisski-ssh-key
    network_mode: "host"
    environment:
    - PORT=${PORT}
    - HPC_HOST=${HPC_HOST}
    - HPC_USER=${HPC_USER}
    - KEY_NAME=${KEY_NAME}
    volumes:
      - "./proxy-hpc/log:/root/log"
    restart: on-failure

# External proxies
  proxy-azure:
    build: ./proxy-azure
    image: proxy-azure:latest
    secrets:
      - openai_key
      - openai_deployment_name_gpt35
      - openai_deployment_name_gpt4
      - openai_endpoint
    network_mode: "host"
    environment:
      - PORT=8731
    volumes:
      - "./proxy-azure/log:/root/log"
    restart: on-failure

secrets:
  ## Database password
  kong_postgres_password:
    file: ./secrets/POSTGRES_PASSWORD
  ## OpenAI/Microsoft Azure integration
  openai_key:
    file: ./secrets/OPENAI_KEY
  openai_deployment_name_gpt35:
    file: ./secrets/OPENAI_DEPLOYMENT_NAME_GPT35
  openai_deployment_name_gpt4:
    file: ./secrets/OPENAI_DEPLOYMENT_NAME_GPT4
  openai_endpoint:
    file: ./secrets/OPENAI_ENDPOINT
  ## HPC integration
  kisski-ssh-key:
    file: ./secrets/kisski-ssh-key # Path to SSH key